# app/modules/orders/routes/api/store.py
"""
Store order management endpoints.

Store Context: Uses token_store_id from JWT token (authenticated store API pattern).
The get_current_store_api dependency guarantees token_store_id is present.

This router aggregates both order routes and exception routes.
"""

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_store_api, require_module_access
from app.core.database import get_db
from app.modules.enums import FrontendType
from app.modules.orders.schemas import (
    OrderDetailResponse,
    OrderListResponse,
    OrderResponse,
    OrderUpdate,
)
from app.modules.orders.services.order_inventory_service import order_inventory_service
from app.modules.orders.services.order_service import order_service
from app.modules.tenancy.schemas.auth import UserContext

# Base router for orders
_orders_router = APIRouter(
    prefix="/orders",
    dependencies=[Depends(require_module_access("orders", FrontendType.STORE))],
)

# Aggregate router that includes both orders and exceptions
router = APIRouter()
logger = logging.getLogger(__name__)


@_orders_router.get("", response_model=OrderListResponse)
def get_store_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: UserContext = Depends(get_current_store_api),
    db: Session = Depends(get_db),
):
    """
    Get all orders for store.

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

    Store is determined from JWT token (store_id claim).
    Requires Authorization header (API endpoint).
    """
    orders, total = order_service.get_store_orders(
        db=db,
        store_id=current_user.token_store_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,
    )


@_orders_router.get("/{order_id}", response_model=OrderDetailResponse)
def get_order_details(
    order_id: int,
    current_user: UserContext = Depends(get_current_store_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, store_id=current_user.token_store_id, order_id=order_id
    )

    return OrderDetailResponse.model_validate(order)


@_orders_router.put("/{order_id}/status", response_model=OrderResponse)
def update_order_status(
    order_id: int,
    order_update: OrderUpdate,
    current_user: UserContext = Depends(get_current_store_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,
        store_id=current_user.token_store_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]


@_orders_router.get("/{order_id}/shipment-status", response_model=ShipmentStatusResponse)
def get_shipment_status(
    order_id: int,
    current_user: UserContext = Depends(get_current_store_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,
        store_id=current_user.token_store_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"]],
    )


@_orders_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: UserContext = Depends(get_current_store_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,
        store_id=current_user.token_store_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_store_id, order_id)

    if order.is_fully_shipped and order.status != "shipped":
        order_service.update_order_status(
            db=db,
            store_id=current_user.token_store_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,
            store_id=current_user.token_store_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)


# ============================================================================
# Aggregate routers
# ============================================================================

# Import sub-routers
from app.modules.orders.routes.api.store_customer_orders import (
    store_customer_orders_router,
)
from app.modules.orders.routes.api.store_exceptions import store_exceptions_router
from app.modules.orders.routes.api.store_invoices import store_invoices_router

# Include all sub-routers into the aggregate router
router.include_router(_orders_router, tags=["store-orders"])
router.include_router(store_exceptions_router, tags=["store-order-exceptions"])
router.include_router(store_invoices_router, tags=["store-invoices"])
router.include_router(store_customer_orders_router, tags=["store-customer-orders"])