orion/app/api/v1/vendor/orders.py

# app/api/v1/vendor/orders.py
"""
Vendor order management endpoints.

Vendor Context: Uses token_vendor_id from JWT token (authenticated vendor API pattern).
The get_current_vendor_api dependency guarantees token_vendor_id is present.
"""

import logging

from fastapi import APIRouter, Depends, Query
from pydantic import BaseModel, Field
from sqlalchemy.orm import Session

from app.api.deps import get_current_vendor_api
from app.core.database import get_db
from app.services.order_inventory_service import order_inventory_service
from app.services.order_service import order_service
from models.database.user import User
from app.modules.orders.schemas import (
    OrderDetailResponse,
    OrderListResponse,
    OrderResponse,
    OrderUpdate,
)

router = APIRouter(prefix="/orders")
logger = logging.getLogger(__name__)


@router.get("", response_model=OrderListResponse)
def get_vendor_orders(
    skip: int = Query(0, ge=0),
    limit: int = Query(100, ge=1, le=1000),
    status: str | None = Query(None, description="Filter by order status"),
    customer_id: int | None = Query(None, description="Filter by customer"),
    current_user: User = Depends(get_current_vendor_api),
    db: Session = Depends(get_db),
):
    """
    Get all orders for vendor.

    Supports filtering by:
    - status: Order status (pending, processing, shipped, delivered, cancelled)
    - customer_id: Filter orders from specific customer

    Vendor is determined from JWT token (vendor_id claim).
    Requires Authorization header (API endpoint).
    """
    orders, total = order_service.get_vendor_orders(
        db=db,
        vendor_id=current_user.token_vendor_id,
        skip=skip,
        limit=limit,
        status=status,
        customer_id=customer_id,
    )

    return OrderListResponse(
        orders=[OrderResponse.model_validate(o) for o in orders],
        total=total,
        skip=skip,
        limit=limit,
    )


@router.get("/{order_id}", response_model=OrderDetailResponse)
def get_order_details(
    order_id: int,
    current_user: User = Depends(get_current_vendor_api),
    db: Session = Depends(get_db),
):
    """
    Get detailed order information including items and addresses.

    Requires Authorization header (API endpoint).
    """
    order = order_service.get_order(
        db=db, vendor_id=current_user.token_vendor_id, order_id=order_id
    )

    return OrderDetailResponse.model_validate(order)


@router.put("/{order_id}/status", response_model=OrderResponse)
def update_order_status(
    order_id: int,
    order_update: OrderUpdate,
    current_user: User = Depends(get_current_vendor_api),
    db: Session = Depends(get_db),
):
    """
    Update order status and tracking information.

    Valid statuses:
    - pending: Order placed, awaiting processing
    - processing: Order being prepared
    - shipped: Order shipped to customer
    - delivered: Order delivered
    - cancelled: Order cancelled
    - refunded: Order refunded

    Requires Authorization header (API endpoint).
    """
    order = order_service.update_order_status(
        db=db,
        vendor_id=current_user.token_vendor_id,
        order_id=order_id,
        order_update=order_update,
    )
    db.commit()

    logger.info(
        f"Order {order.order_number} status updated to {order.status} "
        f"by user {current_user.username}"
    )

    return OrderResponse.model_validate(order)


# ============================================================================
# Partial Shipment Endpoints
# ============================================================================


class ShipItemRequest(BaseModel):
    """Request to ship specific quantity of an order item."""

    quantity: int | None = Field(
        None, ge=1, description="Quantity to ship (default: remaining quantity)"
    )


class ShipItemResponse(BaseModel):
    """Response from shipping an item."""

    order_id: int
    item_id: int
    fulfilled_quantity: int
    shipped_quantity: int | None = None
    remaining_quantity: int | None = None
    is_fully_shipped: bool | None = None
    message: str | None = None


class ShipmentStatusItemResponse(BaseModel):
    """Item-level shipment status."""

    item_id: int
    product_id: int
    product_name: str
    quantity: int
    shipped_quantity: int
    remaining_quantity: int
    is_fully_shipped: bool
    is_partially_shipped: bool


class ShipmentStatusResponse(BaseModel):
    """Order shipment status response."""

    order_id: int
    order_number: str
    order_status: str
    is_fully_shipped: bool
    is_partially_shipped: bool
    shipped_item_count: int
    total_item_count: int
    total_shipped_units: int
    total_ordered_units: int
    items: list[ShipmentStatusItemResponse]


@router.get("/{order_id}/shipment-status", response_model=ShipmentStatusResponse)
def get_shipment_status(
    order_id: int,
    current_user: User = Depends(get_current_vendor_api),
    db: Session = Depends(get_db),
):
    """
    Get detailed shipment status for an order.

    Returns item-level shipment status showing what has been shipped
    and what remains. Useful for partial shipment tracking.

    Requires Authorization header (API endpoint).
    """
    result = order_inventory_service.get_shipment_status(
        db=db,
        vendor_id=current_user.token_vendor_id,
        order_id=order_id,
    )

    return ShipmentStatusResponse(
        order_id=result["order_id"],
        order_number=result["order_number"],
        order_status=result["order_status"],
        is_fully_shipped=result["is_fully_shipped"],
        is_partially_shipped=result["is_partially_shipped"],
        shipped_item_count=result["shipped_item_count"],
        total_item_count=result["total_item_count"],
        total_shipped_units=result["total_shipped_units"],
        total_ordered_units=result["total_ordered_units"],
        items=[ShipmentStatusItemResponse(**item) for item in result["items"]],
    )


@router.post("/{order_id}/items/{item_id}/ship", response_model=ShipItemResponse)
def ship_order_item(
    order_id: int,
    item_id: int,
    request: ShipItemRequest | None = None,
    current_user: User = Depends(get_current_vendor_api),
    db: Session = Depends(get_db),
):
    """
    Ship a specific order item (supports partial shipment).

    Fulfills inventory and updates the item's shipped quantity.
    If quantity is not specified, ships the remaining quantity.

    Example use cases:
    - Ship all of an item: POST /orders/{id}/items/{item_id}/ship
    - Ship partial: POST /orders/{id}/items/{item_id}/ship with {"quantity": 2}

    Requires Authorization header (API endpoint).
    """
    quantity = request.quantity if request else None

    result = order_inventory_service.fulfill_item(
        db=db,
        vendor_id=current_user.token_vendor_id,
        order_id=order_id,
        item_id=item_id,
        quantity=quantity,
        skip_missing=True,
    )

    # Update order status based on shipment state
    order = order_service.get_order(db, current_user.token_vendor_id, order_id)

    if order.is_fully_shipped and order.status != "shipped":
        order_service.update_order_status(
            db=db,
            vendor_id=current_user.token_vendor_id,
            order_id=order_id,
            order_update=OrderUpdate(status="shipped"),
        )
        logger.info(f"Order {order.order_number} fully shipped")
    elif order.is_partially_shipped and order.status not in (
        "partially_shipped",
        "shipped",
    ):
        order_service.update_order_status(
            db=db,
            vendor_id=current_user.token_vendor_id,
            order_id=order_id,
            order_update=OrderUpdate(status="partially_shipped"),
        )
        logger.info(f"Order {order.order_number} partially shipped")

    db.commit()

    logger.info(
        f"Shipped item {item_id} of order {order_id}: "
        f"{result.get('fulfilled_quantity', 0)} units"
    )

    return ShipItemResponse(**result)