init

2026-03-22 12:40:33 +03:00
commit 28a5d51389
61 changed files with 6085 additions and 0 deletions
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -0,0 +1,16 @@
+FROM python:3.12-slim
+
+WORKDIR /app
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY . .
+
+EXPOSE 8000
+
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]
--- a/backend/alembic.ini
+++ b/backend/alembic.ini
@@ -0,0 +1,36 @@
+[alembic]
+script_location = alembic
+sqlalchemy.url = postgresql+asyncpg://print3d:print3d@db:5432/print3d
+
+[loggers]
+keys = root,sqlalchemy,alembic
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARN
+handlers = console
+
+[logger_sqlalchemy]
+level = WARN
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S
--- a/backend/alembic/env.py
+++ b/backend/alembic/env.py
@@ -0,0 +1,49 @@
+import asyncio
+from logging.config import fileConfig
+
+from sqlalchemy import pool
+from sqlalchemy.ext.asyncio import async_engine_from_config
+from alembic import context
+
+from app.database import Base
+from app.models import Material, Calculation, Order
+
+config = context.config
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+target_metadata = Base.metadata
+
+
+def run_migrations_offline():
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(url=url, target_metadata=target_metadata, literal_binds=True)
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def do_run_migrations(connection):
+    context.configure(connection=connection, target_metadata=target_metadata)
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+async def run_async_migrations():
+    connectable = async_engine_from_config(
+        config.get_section(config.config_ini_section, {}),
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+    async with connectable.connect() as connection:
+        await connection.run_sync(do_run_migrations)
+    await connectable.dispose()
+
+
+def run_migrations_online():
+    asyncio.run(run_async_migrations())
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()
--- a/backend/alembic/script.py.mako
+++ b/backend/alembic/script.py.mako
@@ -0,0 +1,23 @@
+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+"""
+from typing import Sequence, Union
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+revision: str = ${repr(up_revision)}
+down_revision: Union[str, None] = ${repr(down_revision)}
+branch_labels: Union[str, Sequence[str], None] = ${repr(branch_labels)}
+depends_on: Union[str, Sequence[str], None] = ${repr(depends_on)}
+
+
+def upgrade() -> None:
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    ${downgrades if downgrades else "pass"}
--- a/backend/app/init.py
+++ b/backend/app/init.py
--- a/backend/app/config.py
+++ b/backend/app/config.py
@@ -0,0 +1,21 @@
+from pydantic_settings import BaseSettings
+
+
+class Settings(BaseSettings):
+    DATABASE_URL: str = "postgresql+asyncpg://print3d:P3D_PASSWORD@31.59.58.220:5432/print3d"
+    GOOGLE_API_KEY: str = ""
+    TELEGRAM_BOT_TOKEN: str = ""
+    TELEGRAM_CHAT_ID: str = ""
+    UPLOAD_DIR: str = "/app/uploads"
+    MAX_FILE_SIZE_MB: int = 50
+
+    MINIO_ENDPOINT: str = "localhost:9000"
+    MINIO_ACCESS_KEY: str = "minioadmin"
+    MINIO_SECRET_KEY: str = "minioadmin"
+    MINIO_BUCKET: str = "filam3d"
+    MINIO_SECURE: bool = False
+
+    model_config = {"env_file": ["../.env", ".env"]}
+
+
+settings = Settings()
--- a/backend/app/database.py
+++ b/backend/app/database.py
@@ -0,0 +1,24 @@
+import logging
+
+from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
+from sqlalchemy.orm import DeclarativeBase
+
+from app.config import settings
+
+logger = logging.getLogger("app.database")
+
+logger.info("Initializing database engine: %s", settings.DATABASE_URL.split("@")[-1])  # log host only, not password
+
+engine = create_async_engine(settings.DATABASE_URL, echo=False)
+async_session = async_sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+async def get_db() -> AsyncSession:
+    logger.debug("Opening database session")
+    async with async_session() as session:
+        yield session
+    logger.debug("Database session closed")
--- a/backend/app/main.py
+++ b/backend/app/main.py
@@ -0,0 +1,90 @@
+import logging
+import sys
+from contextlib import asynccontextmanager
+
+from fastapi import FastAPI, Request
+from fastapi.middleware.cors import CORSMiddleware
+from sqlalchemy import select
+
+from app.database import async_session, engine, Base
+from app.models import Material
+from app.seed.materials import MATERIALS
+from app.routers import calculate, materials, orders, ai_advisor
+
+# Configure logging
+logging.basicConfig(
+    level=logging.DEBUG,
+    format="%(asctime)s | %(levelname)-8s | %(name)-30s | %(message)s",
+    datefmt="%Y-%m-%d %H:%M:%S",
+    stream=sys.stdout,
+)
+logger = logging.getLogger("app.main")
+
+# Reduce noise from third-party libs
+logging.getLogger("uvicorn.access").setLevel(logging.INFO)
+logging.getLogger("sqlalchemy.engine").setLevel(logging.WARNING)
+logging.getLogger("httpx").setLevel(logging.INFO)
+logging.getLogger("httpcore").setLevel(logging.INFO)
+logging.getLogger("trimesh").setLevel(logging.WARNING)
+
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    logger.info("=== Application startup ===")
+
+    logger.info("Creating database tables...")
+    async with engine.begin() as conn:
+        await conn.run_sync(Base.metadata.create_all)
+    logger.info("Database tables created successfully")
+
+    logger.info("Checking seed data...")
+    async with async_session() as session:
+        result = await session.execute(select(Material).limit(1))
+        if result.scalar_one_or_none() is None:
+            logger.info("No materials found, seeding %d materials...", len(MATERIALS))
+            for mat_data in MATERIALS:
+                session.add(Material(**mat_data))
+                logger.debug("  Seeded material: %s", mat_data["name"])
+            await session.commit()
+            logger.info("Materials seeded successfully")
+        else:
+            logger.info("Materials already exist, skipping seed")
+
+    logger.info("=== Application ready ===")
+    yield
+    logger.info("=== Application shutdown ===")
+
+
+app = FastAPI(title="3D Print Calculator", version="1.0.0", lifespan=lifespan)
+
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+
+@app.middleware("http")
+async def log_requests(request: Request, call_next):
+    logger.info("--> %s %s (client: %s)", request.method, request.url.path, request.client.host if request.client else "unknown")
+    logger.debug("    Headers: %s", dict(request.headers))
+    logger.debug("    Query params: %s", dict(request.query_params))
+
+    response = await call_next(request)
+
+    logger.info("<-- %s %s -> %d", request.method, request.url.path, response.status_code)
+    return response
+
+
+app.include_router(calculate.router, prefix="/api")
+app.include_router(materials.router, prefix="/api")
+app.include_router(orders.router, prefix="/api")
+app.include_router(ai_advisor.router, prefix="/api")
+
+
+@app.get("/api/health")
+async def health():
+    logger.debug("Health check requested")
+    return {"status": "ok"}
--- a/backend/app/models/init.py
+++ b/backend/app/models/init.py
@@ -0,0 +1,5 @@
+from app.models.material import Material
+from app.models.calculation import Calculation
+from app.models.order import Order
+
+__all__ = ["Material", "Calculation", "Order"]
--- a/backend/app/models/calculation.py
+++ b/backend/app/models/calculation.py
@@ -0,0 +1,34 @@
+import uuid
+from sqlalchemy import Float, Integer, String, Boolean, ForeignKey, func
+from sqlalchemy.dialects.postgresql import JSONB, UUID
+from sqlalchemy.orm import Mapped, mapped_column
+from datetime import datetime
+
+from app.database import Base
+
+
+class Calculation(Base):
+    __tablename__ = "calculations"
+
+    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    file_name: Mapped[str] = mapped_column(String(255), nullable=False)
+    file_format: Mapped[str] = mapped_column(String(10), nullable=False)
+    file_path: Mapped[str | None] = mapped_column(String(500))
+    volume_cm3: Mapped[float] = mapped_column(Float, nullable=False)
+    surface_area_cm2: Mapped[float | None] = mapped_column(Float)
+    bounding_box: Mapped[dict | None] = mapped_column(JSONB)
+    is_watertight: Mapped[bool | None] = mapped_column(Boolean)
+    triangle_count: Mapped[int | None] = mapped_column(Integer)
+    material_id: Mapped[int] = mapped_column(Integer, ForeignKey("materials.id"), nullable=False)
+    infill_percent: Mapped[int] = mapped_column(Integer, default=30)
+    layer_height_mm: Mapped[float] = mapped_column(Float, default=0.2)
+    quantity: Mapped[int] = mapped_column(Integer, default=1)
+    post_processing: Mapped[dict] = mapped_column(JSONB, default=list)
+    weight_grams: Mapped[float | None] = mapped_column(Float)
+    material_cost_rub: Mapped[float | None] = mapped_column(Float)
+    time_cost_rub: Mapped[float | None] = mapped_column(Float)
+    print_time_hours: Mapped[float | None] = mapped_column(Float)
+    post_processing_cost_rub: Mapped[float | None] = mapped_column(Float)
+    total_rub: Mapped[float | None] = mapped_column(Float)
+    estimated_days: Mapped[int | None] = mapped_column(Integer)
+    created_at: Mapped[datetime] = mapped_column(default=func.now())
--- a/backend/app/models/material.py
+++ b/backend/app/models/material.py
@@ -0,0 +1,28 @@
+from sqlalchemy import Boolean, Float, Integer, String, Text, func
+from sqlalchemy.dialects.postgresql import JSONB
+from sqlalchemy.orm import Mapped, mapped_column
+from datetime import datetime
+
+from app.database import Base
+
+
+class Material(Base):
+    __tablename__ = "materials"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    name: Mapped[str] = mapped_column(String(100), nullable=False)
+    category: Mapped[str] = mapped_column(String(50), nullable=False)
+    density_g_cm3: Mapped[float] = mapped_column(Float, nullable=False)
+    price_per_gram: Mapped[float] = mapped_column(Float, nullable=False)
+    flow_rate_mm3_s: Mapped[float] = mapped_column(Float, nullable=False)
+    max_temp_c: Mapped[int | None] = mapped_column(Integer)
+    min_temp_c: Mapped[int | None] = mapped_column(Integer)
+    strength: Mapped[str | None] = mapped_column(String(20))
+    flexibility: Mapped[str | None] = mapped_column(String(20))
+    chemical_resistance: Mapped[str | None] = mapped_column(String(20))
+    uv_resistance: Mapped[str | None] = mapped_column(String(20))
+    food_safe: Mapped[bool] = mapped_column(Boolean, default=False)
+    description: Mapped[str | None] = mapped_column(Text)
+    color_options: Mapped[dict] = mapped_column(JSONB, default=list)
+    is_active: Mapped[bool] = mapped_column(Boolean, default=True)
+    created_at: Mapped[datetime] = mapped_column(default=func.now())
--- a/backend/app/models/order.py
+++ b/backend/app/models/order.py
@@ -0,0 +1,25 @@
+import uuid
+from sqlalchemy import Float, Integer, String, Text, ForeignKey, func
+from sqlalchemy.dialects.postgresql import UUID
+from sqlalchemy.orm import Mapped, mapped_column
+from datetime import datetime
+
+from app.database import Base
+
+
+class Order(Base):
+    __tablename__ = "orders"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True)
+    order_id: Mapped[str] = mapped_column(String(20), unique=True, nullable=False)
+    calculation_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("calculations.id"), nullable=False)
+    client_name: Mapped[str] = mapped_column(String(200), nullable=False)
+    client_phone: Mapped[str] = mapped_column(String(20), nullable=False)
+    client_email: Mapped[str | None] = mapped_column(String(200))
+    client_company: Mapped[str | None] = mapped_column(String(200))
+    delivery_method: Mapped[str] = mapped_column(String(50), default="pickup")
+    comment: Mapped[str | None] = mapped_column(Text)
+    status: Mapped[str] = mapped_column(String(30), default="pending")
+    total_rub: Mapped[float] = mapped_column(Float, nullable=False)
+    created_at: Mapped[datetime] = mapped_column(default=func.now())
+    updated_at: Mapped[datetime] = mapped_column(default=func.now(), onupdate=func.now())
--- a/backend/app/routers/init.py
+++ b/backend/app/routers/init.py
--- a/backend/app/routers/ai_advisor.py
+++ b/backend/app/routers/ai_advisor.py
@@ -0,0 +1,76 @@
+import logging
+
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.database import get_db
+from app.models.material import Material
+from app.schemas.calculate import AdvisorRequest, AdvisorResponse, AdvisorAlternative
+from app.services.ai_advisor import get_material_recommendation
+
+logger = logging.getLogger("app.routers.ai_advisor")
+
+router = APIRouter()
+
+
+@router.post("/advisor", response_model=AdvisorResponse)
+async def advisor(request: AdvisorRequest, db: AsyncSession = Depends(get_db)):
+    logger.info("===== POST /api/advisor =====")
+    logger.info("Task description: %s", request.task_description)
+    logger.info("Budget preference: %s", request.budget_preference)
+    logger.info("File info: %s", request.file_info)
+
+    logger.info("Fetching materials from database...")
+    result = await db.execute(select(Material).where(Material.is_active == True).order_by(Material.id))
+    materials = result.scalars().all()
+    logger.info("Found %d active materials", len(materials))
+
+    materials_data = [
+        {
+            "id": m.id,
+            "name": m.name,
+            "category": m.category,
+            "density_g_cm3": m.density_g_cm3,
+            "price_per_gram": m.price_per_gram,
+            "max_temp_c": m.max_temp_c,
+            "min_temp_c": m.min_temp_c,
+            "strength": m.strength,
+            "flexibility": m.flexibility,
+            "chemical_resistance": m.chemical_resistance,
+            "uv_resistance": m.uv_resistance,
+            "food_safe": m.food_safe,
+            "description": m.description,
+        }
+        for m in materials
+    ]
+
+    logger.info("Calling AI advisor service...")
+    try:
+        rec = await get_material_recommendation(
+            task_description=request.task_description,
+            materials_data=materials_data,
+            budget_preference=request.budget_preference,
+            file_info=request.file_info,
+        )
+        logger.info("AI advisor returned recommendation: material_id=%s, name=%s",
+                     rec.get("recommended_material_id"), rec.get("recommended_material_name"))
+    except ValueError as e:
+        logger.error("AI advisor ValueError: %s", str(e))
+        raise HTTPException(400, str(e))
+    except Exception as e:
+        logger.error("AI advisor unexpected error: %s", str(e), exc_info=True)
+        raise HTTPException(500, f"Ошибка AI-сервиса: {str(e)}")
+
+    response = AdvisorResponse(
+        recommended_material_id=rec.get("recommended_material_id", 1),
+        recommended_material_name=rec.get("recommended_material_name", ""),
+        reasoning=rec.get("reasoning", ""),
+        alternatives=[
+            AdvisorAlternative(**alt) for alt in rec.get("alternatives", [])
+        ],
+        questions=rec.get("questions", []),
+    )
+
+    logger.info("===== /api/advisor complete =====")
+    return response
--- a/backend/app/routers/calculate.py
+++ b/backend/app/routers/calculate.py
@@ -0,0 +1,200 @@
+import logging
+import os
+import tempfile
+import uuid
+
+from fastapi import APIRouter, Depends, File, Form, HTTPException, UploadFile
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.config import settings
+from app.database import get_db
+from app.models.material import Material
+from app.models.calculation import Calculation
+from app.schemas.calculate import (
+    BoundingBox,
+    CalculateResponse,
+    CalculationResult,
+    FileInfoResponse,
+    MaterialInfo,
+)
+from app.services.file_parser import FileInfo, parse_3d_file, SUPPORTED_EXTENSIONS
+from app.services.price_engine import calculate_price
+from app.services.storage import upload_file, delete_file
+
+logger = logging.getLogger("app.routers.calculate")
+
+router = APIRouter()
+
+MAX_FILE_SIZE = 50 * 1024 * 1024  # 50 MB
+
+
+@router.post("/calculate", response_model=CalculateResponse)
+async def calculate(
+    file: UploadFile = File(...),
+    material_id: int = Form(...),
+    infill_percent: int = Form(30),
+    layer_height_mm: float = Form(0.2),
+    quantity: int = Form(1),
+    post_processing: str = Form(""),
+    db: AsyncSession = Depends(get_db),
+):
+    logger.info("===== /api/calculate request =====")
+
+    # Validate extension
+    filename = file.filename or "unknown"
+    ext = os.path.splitext(filename)[1].lower()
+    logger.info("File: name=%s, ext=%s, content_type=%s", filename, ext, file.content_type)
+
+    if ext not in SUPPORTED_EXTENSIONS:
+        logger.warning("Unsupported file extension: %s (allowed: %s)", ext, SUPPORTED_EXTENSIONS)
+        raise HTTPException(400, f"Неподдерживаемый формат файла. Допустимые: {', '.join(SUPPORTED_EXTENSIONS)}")
+
+    # Validate params
+    logger.info("Params: material_id=%d, infill=%d%%, layer=%.2fmm, qty=%d, post_processing='%s'",
+                material_id, infill_percent, layer_height_mm, quantity, post_processing)
+
+    if not 10 <= infill_percent <= 100:
+        logger.warning("Invalid infill_percent: %d", infill_percent)
+        raise HTTPException(400, "infill_percent должен быть от 10 до 100")
+    if not 0.08 <= layer_height_mm <= 0.4:
+        logger.warning("Invalid layer_height_mm: %.2f", layer_height_mm)
+        raise HTTPException(400, "layer_height_mm должен быть от 0.08 до 0.4")
+    if not 1 <= quantity <= 500:
+        logger.warning("Invalid quantity: %d", quantity)
+        raise HTTPException(400, "quantity должен быть от 1 до 500")
+
+    # Read file
+    logger.info("Reading uploaded file...")
+    content = await file.read()
+    file_size = len(content)
+    logger.info("File read: %d bytes (%.2f MB)", file_size, file_size / 1024 / 1024)
+
+    if file_size > MAX_FILE_SIZE:
+        logger.warning("File too large: %d bytes (max %d)", file_size, MAX_FILE_SIZE)
+        raise HTTPException(413, "Файл слишком большой (максимум 50 MB)")
+
+    # Save to temp file for parsing, then upload to MinIO
+    file_id = str(uuid.uuid4())
+    object_name = f"uploads/{file_id}{ext}"
+    tmp_path = None
+
+    logger.info("Generated file_id: %s, object_name: %s", file_id, object_name)
+
+    try:
+        logger.debug("Writing to temp file for parsing...")
+        with tempfile.NamedTemporaryFile(suffix=ext, delete=False) as tmp:
+            tmp.write(content)
+            tmp_path = tmp.name
+        logger.debug("Temp file created: %s", tmp_path)
+
+        logger.info("Parsing 3D file...")
+        file_info = parse_3d_file(tmp_path, ext)
+        logger.info("File parsed successfully: volume=%.2f cm3, triangles=%d, watertight=%s",
+                     file_info.volume_cm3, file_info.triangle_count, file_info.is_watertight)
+    except Exception as e:
+        logger.error("File parsing failed: %s", str(e), exc_info=True)
+        raise HTTPException(400, f"Ошибка парсинга файла: {str(e)}")
+    finally:
+        if tmp_path and os.path.exists(tmp_path):
+            os.remove(tmp_path)
+            logger.debug("Temp file removed: %s", tmp_path)
+
+    # Upload to MinIO
+    try:
+        logger.info("Uploading to MinIO: %s", object_name)
+        upload_file(object_name, content)
+        logger.info("MinIO upload complete")
+    except Exception as e:
+        logger.error("MinIO upload failed: %s", str(e), exc_info=True)
+        raise HTTPException(500, f"Ошибка загрузки файла в хранилище: {str(e)}")
+
+    # Get material
+    logger.info("Looking up material id=%d...", material_id)
+    result = await db.execute(select(Material).where(Material.id == material_id))
+    material = result.scalar_one_or_none()
+    if not material:
+        logger.warning("Material not found: id=%d", material_id)
+        raise HTTPException(400, f"Материал с id={material_id} не найден")
+    logger.info("Material found: id=%d, name=%s, density=%.2f, price=%.1f RUB/g",
+                material.id, material.name, material.density_g_cm3, material.price_per_gram)
+
+    # Parse post_processing
+    pp_list = [p.strip() for p in post_processing.split(",") if p.strip()] if post_processing else []
+    logger.info("Post-processing options: %s", pp_list)
+
+    # Calculate price
+    logger.info("Calculating price...")
+    price = calculate_price(
+        file_info=file_info,
+        density_g_cm3=material.density_g_cm3,
+        price_per_gram=material.price_per_gram,
+        flow_rate_mm3_s=material.flow_rate_mm3_s,
+        infill_percent=infill_percent,
+        layer_height_mm=layer_height_mm,
+        quantity=quantity,
+        post_processing=pp_list,
+    )
+
+    # Save calculation to DB
+    logger.info("Saving calculation to database...")
+    calc = Calculation(
+        file_name=filename,
+        file_format=ext.lstrip("."),
+        file_path=object_name,
+        volume_cm3=file_info.volume_cm3,
+        surface_area_cm2=file_info.surface_area_cm2,
+        bounding_box=file_info.bounding_box_mm,
+        is_watertight=file_info.is_watertight,
+        triangle_count=file_info.triangle_count,
+        material_id=material.id,
+        infill_percent=infill_percent,
+        layer_height_mm=layer_height_mm,
+        quantity=quantity,
+        post_processing=pp_list,
+        weight_grams=price.weight_grams,
+        material_cost_rub=price.material_cost_rub,
+        time_cost_rub=price.time_cost_rub,
+        print_time_hours=price.print_time_hours,
+        post_processing_cost_rub=price.post_processing_cost_rub,
+        total_rub=price.total_rub,
+        estimated_days=price.estimated_days,
+    )
+    db.add(calc)
+    await db.commit()
+    await db.refresh(calc)
+    logger.info("Calculation saved: id=%s, total=%.2f RUB", calc.id, price.total_rub)
+
+    logger.info("===== /api/calculate complete: %s -> %.2f RUB =====", filename, price.total_rub)
+
+    return CalculateResponse(
+        success=True,
+        calculation_id=str(calc.id),
+        file_info=FileInfoResponse(
+            filename=filename,
+            format=ext.lstrip("."),
+            volume_cm3=round(file_info.volume_cm3, 2),
+            surface_area_cm2=round(file_info.surface_area_cm2, 2),
+            bounding_box_mm=BoundingBox(**file_info.bounding_box_mm),
+            is_watertight=file_info.is_watertight,
+            triangle_count=file_info.triangle_count,
+        ),
+        calculation=CalculationResult(
+            material=MaterialInfo(
+                id=material.id,
+                name=material.name,
+                density_g_cm3=material.density_g_cm3,
+                price_per_gram=material.price_per_gram,
+            ),
+            weight_grams=price.weight_grams,
+            material_cost_rub=price.material_cost_rub,
+            print_time_hours=price.print_time_hours,
+            time_cost_rub=price.time_cost_rub,
+            post_processing_cost_rub=price.post_processing_cost_rub,
+            subtotal_rub=price.subtotal_rub,
+            quantity=price.quantity,
+            quantity_discount_percent=price.quantity_discount_percent,
+            total_rub=price.total_rub,
+            estimated_days=price.estimated_days,
+        ),
+    )
--- a/backend/app/routers/materials.py
+++ b/backend/app/routers/materials.py
@@ -0,0 +1,52 @@
+import logging
+
+from fastapi import APIRouter, Depends
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.database import get_db
+from app.models.material import Material
+from app.schemas.material import MaterialResponse, MaterialProperties
+
+logger = logging.getLogger("app.routers.materials")
+
+router = APIRouter()
+
+
+@router.get("/materials", response_model=list[MaterialResponse])
+async def get_materials(db: AsyncSession = Depends(get_db)):
+    logger.info("GET /api/materials")
+
+    result = await db.execute(select(Material).where(Material.is_active == True).order_by(Material.id))
+    materials = result.scalars().all()
+    logger.info("Found %d active materials", len(materials))
+
+    response = [
+        MaterialResponse(
+            id=m.id,
+            name=m.name,
+            category=m.category,
+            price_per_gram=m.price_per_gram,
+            density_g_cm3=m.density_g_cm3,
+            flow_rate_mm3_s=m.flow_rate_mm3_s,
+            properties=MaterialProperties(
+                max_temp_c=m.max_temp_c,
+                min_temp_c=m.min_temp_c,
+                strength=m.strength,
+                flexibility=m.flexibility,
+                chemical_resistance=m.chemical_resistance,
+                uv_resistance=m.uv_resistance,
+                food_safe=m.food_safe,
+            ),
+            description=m.description,
+            color_options=m.color_options or [],
+        )
+        for m in materials
+    ]
+
+    for m in materials:
+        logger.debug("  Material: id=%d, name=%s, category=%s, price=%.1f RUB/g",
+                      m.id, m.name, m.category, m.price_per_gram)
+
+    logger.info("Returning %d materials", len(response))
+    return response
--- a/backend/app/routers/orders.py
+++ b/backend/app/routers/orders.py
@@ -0,0 +1,106 @@
+import logging
+import uuid
+from datetime import datetime, timedelta
+
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy import select, func
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.database import get_db
+from app.models.calculation import Calculation
+from app.models.material import Material
+from app.models.order import Order
+from app.schemas.order import OrderCreate, OrderResponse
+from app.services.telegram_notify import notify_new_order
+
+logger = logging.getLogger("app.routers.orders")
+
+router = APIRouter()
+
+
+async def generate_order_id(db: AsyncSession) -> str:
+    year = datetime.now().year
+    result = await db.execute(
+        select(func.count(Order.id)).where(Order.order_id.like(f"ORD-{year}-%"))
+    )
+    count = result.scalar() or 0
+    order_id = f"ORD-{year}-{count + 1:04d}"
+    logger.debug("Generated order_id: %s (existing count: %d)", order_id, count)
+    return order_id
+
+
+@router.post("/orders", response_model=OrderResponse)
+async def create_order(order_data: OrderCreate, db: AsyncSession = Depends(get_db)):
+    logger.info("===== POST /api/orders =====")
+    logger.info("Client: name=%s, phone=%s, email=%s, company=%s",
+                order_data.client_name, order_data.client_phone,
+                order_data.client_email, order_data.client_company)
+    logger.info("Calculation ID: %s", order_data.calculation_id)
+    logger.info("Delivery: %s, comment: %s", order_data.delivery_method, order_data.comment)
+
+    # Get calculation
+    try:
+        calc_uuid = uuid.UUID(order_data.calculation_id)
+    except ValueError:
+        logger.warning("Invalid calculation_id format: %s", order_data.calculation_id)
+        raise HTTPException(400, "Некорректный calculation_id")
+
+    logger.info("Looking up calculation: %s", calc_uuid)
+    result = await db.execute(select(Calculation).where(Calculation.id == calc_uuid))
+    calc = result.scalar_one_or_none()
+    if not calc:
+        logger.warning("Calculation not found: %s", calc_uuid)
+        raise HTTPException(404, "Расчёт не найден")
+    logger.info("Calculation found: total=%.2f RUB, material_id=%d, estimated_days=%s",
+                calc.total_rub, calc.material_id, calc.estimated_days)
+
+    # Get material name for notification
+    logger.debug("Looking up material id=%d for notification...", calc.material_id)
+    mat_result = await db.execute(select(Material).where(Material.id == calc.material_id))
+    material = mat_result.scalar_one_or_none()
+    material_name = material.name if material else "Неизвестный"
+    logger.info("Material for notification: %s", material_name)
+
+    order_id = await generate_order_id(db)
+    estimated_ready = datetime.now() + timedelta(days=calc.estimated_days or 3)
+    logger.info("Order ID: %s, estimated ready: %s", order_id, estimated_ready.strftime("%Y-%m-%d"))
+
+    order = Order(
+        order_id=order_id,
+        calculation_id=calc.id,
+        client_name=order_data.client_name,
+        client_phone=order_data.client_phone,
+        client_email=order_data.client_email,
+        client_company=order_data.client_company,
+        delivery_method=order_data.delivery_method,
+        comment=order_data.comment,
+        total_rub=calc.total_rub,
+    )
+    db.add(order)
+    await db.commit()
+    await db.refresh(order)
+    logger.info("Order saved to database: id=%d, order_id=%s", order.id, order_id)
+
+    # Send Telegram notification
+    logger.info("Sending Telegram notification...")
+    try:
+        await notify_new_order(
+            order_id=order_id,
+            client_name=order_data.client_name,
+            client_phone=order_data.client_phone,
+            material_name=material_name,
+            total_rub=calc.total_rub,
+            comment=order_data.comment,
+        )
+        logger.info("Telegram notification sent successfully")
+    except Exception:
+        logger.exception("Telegram notification failed (order still created)")
+
+    logger.info("===== Order created: %s -> %.2f RUB =====", order_id, calc.total_rub)
+
+    return OrderResponse(
+        order_id=order_id,
+        status="pending",
+        total_rub=calc.total_rub,
+        estimated_ready_date=estimated_ready.strftime("%Y-%m-%d"),
+    )
--- a/backend/app/schemas/init.py
+++ b/backend/app/schemas/init.py
--- a/backend/app/schemas/calculate.py
+++ b/backend/app/schemas/calculate.py
@@ -0,0 +1,65 @@
+from pydantic import BaseModel, Field
+
+
+class BoundingBox(BaseModel):
+    x: float
+    y: float
+    z: float
+
+
+class FileInfoResponse(BaseModel):
+    filename: str
+    format: str
+    volume_cm3: float
+    surface_area_cm2: float
+    bounding_box_mm: BoundingBox
+    is_watertight: bool
+    triangle_count: int
+
+
+class MaterialInfo(BaseModel):
+    id: int
+    name: str
+    density_g_cm3: float
+    price_per_gram: float
+
+
+class CalculationResult(BaseModel):
+    material: MaterialInfo
+    weight_grams: float
+    material_cost_rub: float
+    print_time_hours: float
+    time_cost_rub: float
+    post_processing_cost_rub: float
+    subtotal_rub: float
+    quantity: int
+    quantity_discount_percent: int
+    total_rub: float
+    estimated_days: int
+
+
+class CalculateResponse(BaseModel):
+    success: bool = True
+    calculation_id: str
+    file_info: FileInfoResponse
+    calculation: CalculationResult
+
+
+class AdvisorRequest(BaseModel):
+    task_description: str
+    budget_preference: str = "optimal"
+    file_info: dict | None = None
+
+
+class AdvisorAlternative(BaseModel):
+    material_id: int
+    name: str
+    why: str
+
+
+class AdvisorResponse(BaseModel):
+    recommended_material_id: int
+    recommended_material_name: str
+    reasoning: str
+    alternatives: list[AdvisorAlternative] = []
+    questions: list[str] = []
--- a/backend/app/schemas/material.py
+++ b/backend/app/schemas/material.py
@@ -0,0 +1,25 @@
+from pydantic import BaseModel
+
+
+class MaterialProperties(BaseModel):
+    max_temp_c: int | None = None
+    min_temp_c: int | None = None
+    strength: str | None = None
+    flexibility: str | None = None
+    chemical_resistance: str | None = None
+    uv_resistance: str | None = None
+    food_safe: bool = False
+
+
+class MaterialResponse(BaseModel):
+    id: int
+    name: str
+    category: str
+    price_per_gram: float
+    density_g_cm3: float
+    flow_rate_mm3_s: float
+    properties: MaterialProperties
+    description: str | None = None
+    color_options: list[str] = []
+
+    model_config = {"from_attributes": True}
--- a/backend/app/schemas/order.py
+++ b/backend/app/schemas/order.py
@@ -0,0 +1,18 @@
+from pydantic import BaseModel, Field
+
+
+class OrderCreate(BaseModel):
+    calculation_id: str
+    client_name: str
+    client_phone: str = Field(pattern=r"^\+?\d{10,15}$")
+    client_email: str | None = None
+    client_company: str | None = None
+    delivery_method: str = "pickup"
+    comment: str | None = None
+
+
+class OrderResponse(BaseModel):
+    order_id: str
+    status: str
+    total_rub: float
+    estimated_ready_date: str
--- a/backend/app/seed/init.py
+++ b/backend/app/seed/init.py
--- a/backend/app/seed/materials.py
+++ b/backend/app/seed/materials.py
@@ -0,0 +1,114 @@
+MATERIALS = [
+    {
+        "name": "PLA",
+        "category": "basic",
+        "density_g_cm3": 1.24,
+        "price_per_gram": 25.0,
+        "flow_rate_mm3_s": 15.0,
+        "max_temp_c": 60,
+        "min_temp_c": -20,
+        "strength": "medium",
+        "flexibility": "low",
+        "chemical_resistance": "low",
+        "uv_resistance": "low",
+        "food_safe": True,
+        "description": "Базовый пластик. Лёгкий в печати, хорошая детализация. Для прототипов и декора.",
+        "color_options": ["white", "black", "gray", "red", "blue", "green", "natural"],
+    },
+    {
+        "name": "PETG",
+        "category": "basic",
+        "density_g_cm3": 1.27,
+        "price_per_gram": 28.0,
+        "flow_rate_mm3_s": 12.0,
+        "max_temp_c": 80,
+        "min_temp_c": -40,
+        "strength": "high",
+        "flexibility": "medium",
+        "chemical_resistance": "medium",
+        "uv_resistance": "medium",
+        "food_safe": True,
+        "description": "Универсальный инженерный пластик. Прочный, химстойкий, подходит для улицы.",
+        "color_options": ["white", "black", "gray", "natural", "blue"],
+    },
+    {
+        "name": "ABS",
+        "category": "basic",
+        "density_g_cm3": 1.04,
+        "price_per_gram": 25.0,
+        "flow_rate_mm3_s": 12.0,
+        "max_temp_c": 100,
+        "min_temp_c": -30,
+        "strength": "high",
+        "flexibility": "low",
+        "chemical_resistance": "medium",
+        "uv_resistance": "low",
+        "food_safe": False,
+        "description": "Термостойкий, ударопрочный. Требует закрытой камеры. Обрабатывается ацетоном.",
+        "color_options": ["white", "black", "gray", "red", "blue"],
+    },
+    {
+        "name": "PA (Nylon)",
+        "category": "engineering",
+        "density_g_cm3": 1.14,
+        "price_per_gram": 50.0,
+        "flow_rate_mm3_s": 10.0,
+        "max_temp_c": 120,
+        "min_temp_c": -40,
+        "strength": "very_high",
+        "flexibility": "medium",
+        "chemical_resistance": "high",
+        "uv_resistance": "medium",
+        "food_safe": False,
+        "description": "Инженерный пластик. Высокая прочность, износостойкость. Для шестерён, креплений.",
+        "color_options": ["natural", "black"],
+    },
+    {
+        "name": "PC (Поликарбонат)",
+        "category": "engineering",
+        "density_g_cm3": 1.20,
+        "price_per_gram": 60.0,
+        "flow_rate_mm3_s": 8.0,
+        "max_temp_c": 140,
+        "min_temp_c": -40,
+        "strength": "very_high",
+        "flexibility": "low",
+        "chemical_resistance": "high",
+        "uv_resistance": "high",
+        "food_safe": False,
+        "description": "Максимальная термостойкость и прочность. Для корпусов, работающих при высоких температурах.",
+        "color_options": ["natural", "black"],
+    },
+    {
+        "name": "TPU",
+        "category": "engineering",
+        "density_g_cm3": 1.21,
+        "price_per_gram": 40.0,
+        "flow_rate_mm3_s": 6.0,
+        "max_temp_c": 80,
+        "min_temp_c": -30,
+        "strength": "medium",
+        "flexibility": "very_high",
+        "chemical_resistance": "high",
+        "uv_resistance": "medium",
+        "food_safe": False,
+        "description": "Эластичный пластик, аналог резины. Для прокладок, амортизаторов, гибких деталей.",
+        "color_options": ["white", "black", "natural"],
+    },
+    {
+        "name": "PA-CF (Нейлон + углеволокно)",
+        "category": "composite",
+        "density_g_cm3": 1.18,
+        "price_per_gram": 75.0,
+        "flow_rate_mm3_s": 8.0,
+        "max_temp_c": 150,
+        "min_temp_c": -40,
+        "strength": "extreme",
+        "flexibility": "low",
+        "chemical_resistance": "very_high",
+        "uv_resistance": "high",
+        "food_safe": False,
+        "description": "Композит с углеволокном. Максимальная жёсткость и прочность. Замена алюминия.",
+        "color_options": ["black"],
+    },
+]
--- a/backend/app/services/init.py
+++ b/backend/app/services/init.py
--- a/backend/app/services/ai_advisor.py
+++ b/backend/app/services/ai_advisor.py
@@ -0,0 +1,104 @@
+import json
+import logging
+import time
+
+from google import genai
+from google.genai import types
+
+from app.config import settings
+
+logger = logging.getLogger("app.services.ai_advisor")
+
+SYSTEM_PROMPT = """
+Ты — эксперт по 3D-печати из инженерных пластиков по технологии FDM.
+Твоя задача — рекомендовать оптимальный материал для печати на основе описания задачи клиента.
+
+Доступные материалы:
+{materials_json}
+
+Правила:
+1. Всегда рекомендуй один основной материал и 1-2 альтернативы.
+2. Учитывай: температурный режим, механические нагрузки, химическое воздействие, UV, влажность.
+3. Если задача не подходит для FDM-печати (слишком мелкие детали, высокая точность) — честно скажи об этом.
+4. Отвечай кратко, по делу, на русском языке.
+5. Если клиент не указал критичные параметры — задай уточняющие вопросы.
+
+Формат ответа — строго JSON:
+{{
+  "recommended_material_id": <int>,
+  "recommended_material_name": "<str>",
+  "reasoning": "<обоснование на русском>",
+  "alternatives": [{{"material_id": <int>, "name": "<str>", "why": "<причина>"}}],
+  "questions": ["<вопрос, если нужна доп. информация>"]
+}}
+"""
+
+
+async def get_material_recommendation(
+    task_description: str,
+    materials_data: list[dict],
+    budget_preference: str = "optimal",
+    file_info: dict | None = None,
+) -> dict:
+    """Get material recommendation from Google Gemini API."""
+    logger.info("=== AI Advisor request ===")
+    logger.info("Task: %s", task_description)
+    logger.info("Budget preference: %s", budget_preference)
+    logger.info("File info: %s", file_info)
+    logger.info("Materials count: %d", len(materials_data))
+
+    if not settings.GOOGLE_API_KEY:
+        logger.error("GOOGLE_API_KEY is not configured")
+        raise ValueError("GOOGLE_API_KEY not configured")
+
+    materials_json = json.dumps(materials_data, ensure_ascii=False, indent=2)
+    system = SYSTEM_PROMPT.format(materials_json=materials_json)
+    logger.debug("System prompt length: %d chars", len(system))
+
+    user_message = f"Описание задачи: {task_description}\nПредпочтение по бюджету: {budget_preference}"
+    if file_info:
+        user_message += f"\nИнформация о модели: {json.dumps(file_info, ensure_ascii=False)}"
+    logger.debug("User message: %s", user_message)
+
+    logger.info("Sending request to Gemini API (model: gemini-2.0-flash)...")
+    start_time = time.time()
+
+    client = genai.Client(api_key=settings.GOOGLE_API_KEY)
+    response = await client.aio.models.generate_content(
+        model="gemini-3-flash-preview",
+        contents=user_message,
+        config=types.GenerateContentConfig(
+            system_instruction=system,
+            max_output_tokens=1024,
+            temperature=0.3,
+        ),
+    )
+
+    elapsed = time.time() - start_time
+    logger.info("Gemini API responded in %.2f seconds", elapsed)
+
+    response_text = response.text
+    logger.debug("Raw response (%d chars): %s", len(response_text), response_text[:500])
+
+    try:
+        result = json.loads(response_text)
+        logger.info("Response parsed as JSON successfully")
+        logger.info("Recommended material: id=%s, name=%s",
+                     result.get("recommended_material_id"), result.get("recommended_material_name"))
+        logger.info("Alternatives: %d, Questions: %d",
+                     len(result.get("alternatives", [])), len(result.get("questions", [])))
+        logger.info("=== AI Advisor complete ===")
+        return result
+    except json.JSONDecodeError:
+        logger.warning("Direct JSON parse failed, trying to extract JSON from response...")
+        start = response_text.find("{")
+        end = response_text.rfind("}") + 1
+        if start != -1 and end > start:
+            extracted = response_text[start:end]
+            logger.debug("Extracted JSON substring [%d:%d]: %s", start, end, extracted[:300])
+            result = json.loads(extracted)
+            logger.info("Extracted JSON parsed successfully")
+            logger.info("=== AI Advisor complete ===")
+            return result
+        logger.error("Failed to extract JSON from AI response: %s", response_text[:200])
+        raise ValueError("AI вернул невалидный JSON")
--- a/backend/app/services/file_parser.py
+++ b/backend/app/services/file_parser.py
@@ -0,0 +1,62 @@
+import logging
+from dataclasses import dataclass
+
+import trimesh
+
+logger = logging.getLogger("app.services.file_parser")
+
+
+@dataclass
+class FileInfo:
+    volume_cm3: float
+    surface_area_cm2: float
+    bounding_box_mm: dict[str, float]
+    is_watertight: bool
+    triangle_count: int
+
+
+SUPPORTED_EXTENSIONS = {".stl", ".3mf", ".obj"}
+
+
+def parse_3d_file(file_path: str, file_extension: str) -> FileInfo:
+    """Parse a 3D file and return geometric properties."""
+    ext = file_extension.lower().lstrip(".")
+    logger.info("Parsing 3D file: path=%s, extension=%s", file_path, ext)
+
+    logger.debug("Loading mesh with trimesh (file_type=%s)...", ext)
+    mesh = trimesh.load(file_path, file_type=ext)
+    logger.debug("Trimesh loaded object type: %s", type(mesh).__name__)
+
+    if isinstance(mesh, trimesh.Scene):
+        meshes = list(mesh.dump())
+        logger.info("File is a Scene with %d geometries, concatenating...", len(meshes))
+        if not meshes:
+            logger.error("Scene contains no geometries")
+            raise ValueError("Файл не содержит 3D-геометрии")
+        mesh = trimesh.util.concatenate(meshes)
+        logger.debug("Concatenated into single Trimesh")
+
+    if not isinstance(mesh, trimesh.Trimesh):
+        logger.error("Could not extract Trimesh object, got: %s", type(mesh).__name__)
+        raise ValueError("Не удалось извлечь 3D-геометрию из файла")
+
+    volume_cm3 = abs(mesh.volume) / 1000.0
+    surface_area_cm2 = mesh.area / 100.0
+    bbox = {
+        "x": round(float(mesh.bounding_box.extents[0]), 2),
+        "y": round(float(mesh.bounding_box.extents[1]), 2),
+        "z": round(float(mesh.bounding_box.extents[2]), 2),
+    }
+    is_watertight = bool(mesh.is_watertight)
+    triangle_count = len(mesh.faces)
+
+    logger.info("Parse result: volume=%.2f cm3, area=%.2f cm2, bbox=%s, watertight=%s, triangles=%d",
+                volume_cm3, surface_area_cm2, bbox, is_watertight, triangle_count)
+
+    return FileInfo(
+        volume_cm3=volume_cm3,
+        surface_area_cm2=surface_area_cm2,
+        bounding_box_mm=bbox,
+        is_watertight=is_watertight,
+        triangle_count=triangle_count,
+    )
--- a/backend/app/services/price_engine.py
+++ b/backend/app/services/price_engine.py
@@ -0,0 +1,140 @@
+import logging
+from dataclasses import dataclass
+from app.services.file_parser import FileInfo
+
+logger = logging.getLogger("app.services.price_engine")
+
+TIME_RATE_PER_HOUR = 200.0  # руб/час
+SETUP_TIME_MIN = 15.0  # минуты
+TRAVEL_TIME_PER_LAYER_MIN = 0.3
+
+POST_PROCESSING_COSTS = {
+    "sanding": 300.0,
+    "painting": 500.0,
+    "threading": 200.0,
+    "acetone_smoothing": 400.0,
+}
+
+QUANTITY_DISCOUNTS = [
+    (1, 0),
+    (2, 5),
+    (6, 10),
+    (21, 15),
+    (101, 20),
+]
+
+
+@dataclass
+class PriceResult:
+    weight_grams: float
+    material_cost_rub: float
+    print_time_hours: float
+    time_cost_rub: float
+    post_processing_cost_rub: float
+    subtotal_rub: float
+    quantity: int
+    quantity_discount_percent: int
+    total_rub: float
+    estimated_days: int
+
+
+def get_quantity_discount(quantity: int) -> int:
+    discount = 0
+    for min_qty, disc in QUANTITY_DISCOUNTS:
+        if quantity >= min_qty:
+            discount = disc
+    logger.debug("Quantity discount for %d pcs: %d%%", quantity, discount)
+    return discount
+
+
+def estimate_print_time(file_info: FileInfo, layer_height_mm: float, flow_rate_mm3_s: float) -> float:
+    """Estimate print time in hours."""
+    z_height = file_info.bounding_box_mm.get("z", 10.0)
+    layers = max(z_height / layer_height_mm, 1)
+    volume_mm3 = file_info.volume_cm3 * 1000.0
+    volume_per_layer = volume_mm3 / layers
+    time_per_layer_min = volume_per_layer / flow_rate_mm3_s / 60.0
+    total_min = layers * (time_per_layer_min + TRAVEL_TIME_PER_LAYER_MIN) + SETUP_TIME_MIN
+    hours = round(total_min / 60.0, 1)
+    logger.debug("Print time estimate: z=%.1fmm, layers=%.0f, vol_per_layer=%.1fmm3, "
+                 "time_per_layer=%.2fmin, total=%.1fmin (%.1fh)",
+                 z_height, layers, volume_per_layer, time_per_layer_min, total_min, hours)
+    return hours
+
+
+def calculate_price(
+    file_info: FileInfo,
+    density_g_cm3: float,
+    price_per_gram: float,
+    flow_rate_mm3_s: float,
+    infill_percent: int = 30,
+    layer_height_mm: float = 0.2,
+    quantity: int = 1,
+    post_processing: list[str] | None = None,
+) -> PriceResult:
+    post_processing = post_processing or []
+
+    logger.info("=== Price calculation start ===")
+    logger.info("Input: volume=%.2f cm3, density=%.2f g/cm3, price_per_gram=%.1f RUB",
+                file_info.volume_cm3, density_g_cm3, price_per_gram)
+    logger.info("Params: infill=%d%%, layer=%.2fmm, qty=%d, post_processing=%s",
+                infill_percent, layer_height_mm, quantity, post_processing)
+
+    effective_volume = file_info.volume_cm3 * (infill_percent / 100.0) * 0.7 + file_info.volume_cm3 * 0.3
+    logger.debug("Effective volume: %.2f cm3 (infill-scaled: %.2f + walls: %.2f)",
+                 effective_volume,
+                 file_info.volume_cm3 * (infill_percent / 100.0) * 0.7,
+                 file_info.volume_cm3 * 0.3)
+
+    weight_g = round(effective_volume * density_g_cm3, 1)
+    material_cost = round(weight_g * price_per_gram, 2)
+    logger.debug("Weight: %.1f g, material cost: %.2f RUB", weight_g, material_cost)
+
+    print_time_h = estimate_print_time(file_info, layer_height_mm, flow_rate_mm3_s)
+    time_cost = round(print_time_h * TIME_RATE_PER_HOUR, 2)
+    logger.debug("Print time: %.1f h, time cost: %.2f RUB (rate: %.0f RUB/h)", print_time_h, time_cost, TIME_RATE_PER_HOUR)
+
+    pp_cost = 0.0
+    for pp in post_processing:
+        cost = POST_PROCESSING_COSTS.get(pp, 0)
+        logger.debug("Post-processing '%s': %.0f RUB", pp, cost)
+        pp_cost += cost
+    pp_cost = round(pp_cost, 2)
+    logger.debug("Total post-processing cost: %.2f RUB", pp_cost)
+
+    subtotal = round(material_cost + time_cost + pp_cost, 2)
+    logger.debug("Subtotal (1 pc): %.2f RUB = material(%.2f) + time(%.2f) + pp(%.2f)",
+                 subtotal, material_cost, time_cost, pp_cost)
+
+    discount_pct = get_quantity_discount(quantity)
+    total = round(subtotal * quantity * (1 - discount_pct / 100.0), 2)
+    logger.info("Total: %.2f RUB (qty=%d, discount=%d%%, subtotal_per_unit=%.2f)",
+                total, quantity, discount_pct, subtotal)
+
+    if print_time_h <= 2:
+        estimated_days = 2
+    elif print_time_h <= 8:
+        estimated_days = 3
+    else:
+        estimated_days = 5
+
+    if quantity > 10:
+        estimated_days += 2
+    if quantity > 50:
+        estimated_days += 3
+
+    logger.info("Estimated days: %d", estimated_days)
+    logger.info("=== Price calculation complete ===")
+
+    return PriceResult(
+        weight_grams=weight_g,
+        material_cost_rub=material_cost,
+        print_time_hours=print_time_h,
+        time_cost_rub=time_cost,
+        post_processing_cost_rub=pp_cost,
+        subtotal_rub=subtotal,
+        quantity=quantity,
+        quantity_discount_percent=discount_pct,
+        total_rub=total,
+        estimated_days=estimated_days,
+    )
--- a/backend/app/services/storage.py
+++ b/backend/app/services/storage.py
@@ -0,0 +1,67 @@
+import io
+import logging
+
+from minio import Minio
+from minio.error import S3Error
+
+from app.config import settings
+
+logger = logging.getLogger("app.services.storage")
+
+_client: Minio | None = None
+
+
+def get_minio_client() -> Minio:
+    global _client
+    if _client is None:
+        logger.info("Initializing MinIO client: endpoint=%s, secure=%s", settings.MINIO_ENDPOINT, settings.MINIO_SECURE)
+        _client = Minio(
+            endpoint=settings.MINIO_ENDPOINT,
+            access_key=settings.MINIO_ACCESS_KEY,
+            secret_key=settings.MINIO_SECRET_KEY,
+            secure=settings.MINIO_SECURE,
+        )
+        logger.info("MinIO client created, checking bucket '%s'...", settings.MINIO_BUCKET)
+        if not _client.bucket_exists(settings.MINIO_BUCKET):
+            _client.make_bucket(settings.MINIO_BUCKET)
+            logger.info("Created MinIO bucket: %s", settings.MINIO_BUCKET)
+        else:
+            logger.info("MinIO bucket '%s' already exists", settings.MINIO_BUCKET)
+    return _client
+
+
+def upload_file(object_name: str, data: bytes, content_type: str = "application/octet-stream") -> str:
+    """Upload file to MinIO. Returns the object name (key)."""
+    logger.info("Uploading to MinIO: object=%s, size=%d bytes, content_type=%s", object_name, len(data), content_type)
+    client = get_minio_client()
+    client.put_object(
+        bucket_name=settings.MINIO_BUCKET,
+        object_name=object_name,
+        data=io.BytesIO(data),
+        length=len(data),
+        content_type=content_type,
+    )
+    logger.info("Upload complete: %s/%s", settings.MINIO_BUCKET, object_name)
+    return object_name
+
+
+def download_file(object_name: str) -> bytes:
+    """Download file from MinIO."""
+    logger.info("Downloading from MinIO: %s/%s", settings.MINIO_BUCKET, object_name)
+    client = get_minio_client()
+    response = client.get_object(settings.MINIO_BUCKET, object_name)
+    try:
+        data = response.read()
+        logger.info("Download complete: %s, size=%d bytes", object_name, len(data))
+        return data
+    finally:
+        response.close()
+        response.release_conn()
+
+
+def delete_file(object_name: str) -> None:
+    """Delete file from MinIO."""
+    logger.info("Deleting from MinIO: %s/%s", settings.MINIO_BUCKET, object_name)
+    client = get_minio_client()
+    client.remove_object(settings.MINIO_BUCKET, object_name)
+    logger.info("Deleted: %s", object_name)
--- a/backend/app/services/telegram_notify.py
+++ b/backend/app/services/telegram_notify.py
@@ -0,0 +1,48 @@
+import logging
+
+import httpx
+
+from app.config import settings
+
+logger = logging.getLogger("app.services.telegram")
+
+
+async def notify_new_order(
+    order_id: str,
+    client_name: str,
+    client_phone: str,
+    material_name: str,
+    total_rub: float,
+    comment: str | None = None,
+) -> None:
+    """Send a notification about a new order to Telegram."""
+    logger.info("=== Telegram notification ===")
+    logger.info("Order: %s, client: %s, phone: %s, material: %s, total: %.2f RUB",
+                order_id, client_name, client_phone, material_name, total_rub)
+
+    if not settings.TELEGRAM_BOT_TOKEN or not settings.TELEGRAM_CHAT_ID:
+        logger.warning("Telegram credentials not configured (token=%s, chat_id=%s), skipping",
+                        "set" if settings.TELEGRAM_BOT_TOKEN else "empty",
+                        "set" if settings.TELEGRAM_CHAT_ID else "empty")
+        return
+
+    text = (
+        f"\U0001f195 Новый заказ #{order_id}\n"
+        f"Клиент: {client_name}\n"
+        f"Телефон: {client_phone}\n"
+        f"Материал: {material_name}\n"
+        f"Сумма: {total_rub} \u20bd\n"
+        f"Комментарий: {comment or '\u2014'}"
+    )
+
+    url = f"https://api.telegram.org/bot{settings.TELEGRAM_BOT_TOKEN}/sendMessage"
+    logger.debug("Sending to Telegram: chat_id=%s, text_length=%d", settings.TELEGRAM_CHAT_ID, len(text))
+
+    try:
+        async with httpx.AsyncClient(timeout=10) as client:
+            resp = await client.post(url, json={"chat_id": settings.TELEGRAM_CHAT_ID, "text": text})
+            logger.info("Telegram response: status=%d, body=%s", resp.status_code, resp.text[:200])
+            if resp.status_code != 200:
+                logger.error("Telegram API error: %s", resp.text)
+    except Exception:
+        logger.exception("Failed to send Telegram notification")
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -0,0 +1,13 @@
+fastapi==0.115.6
+uvicorn[standard]==0.34.0
+sqlalchemy[asyncio]==2.0.36
+asyncpg==0.30.0
+pydantic-settings==2.7.1
+alembic==1.14.1
+trimesh==4.5.3
+numpy-stl==3.1.2
+numpy==2.2.1
+python-multipart==0.0.20
+httpx==0.28.1
+minio==7.2.12
+google-genai==1.14.0