# app/modules/inventory/routes/api/store.py
"""
Store inventory 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.
"""

import logging

from fastapi import APIRouter, Depends, Query
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.inventory.schemas import (
    InventoryAdjust,
    InventoryCreate,
    InventoryListResponse,
    InventoryMessageResponse,
    InventoryReserve,
    InventoryResponse,
    InventoryTransactionListResponse,
    InventoryTransactionWithProduct,
    InventoryUpdate,
    OrderTransactionHistoryResponse,
    ProductInventorySummary,
    ProductTransactionHistoryResponse,
)
from app.modules.inventory.services.inventory_service import inventory_service
from app.modules.inventory.services.inventory_transaction_service import (
    inventory_transaction_service,
)
from app.modules.tenancy.schemas.auth import UserContext

router = APIRouter(
    prefix="/inventory",
    dependencies=[Depends(require_module_access("inventory", FrontendType.STORE))],
)
logger = logging.getLogger(__name__)


@router.post("/set", response_model=InventoryResponse)
def set_inventory(
    inventory: InventoryCreate,
    current_user: UserContext = Depends(get_current_store_api),
    db: Session = Depends(get_db),
):
    """Set exact inventory quantity (replaces existing)."""
    result = inventory_service.set_inventory(
        db, current_user.token_store_id, inventory
    )
    db.commit()
    return result


@router.post("/adjust", response_model=InventoryResponse)
def adjust_inventory(
    adjustment: InventoryAdjust,
    current_user: UserContext = Depends(get_current_store_api),
    db: Session = Depends(get_db),
):
    """Adjust inventory (positive to add, negative to remove)."""
    result = inventory_service.adjust_inventory(
        db, current_user.token_store_id, adjustment
    )
    db.commit()
    return result


@router.post("/reserve", response_model=InventoryResponse)
def reserve_inventory(
    reservation: InventoryReserve,
    current_user: UserContext = Depends(get_current_store_api),
    db: Session = Depends(get_db),
):
    """Reserve inventory for an order."""
    result = inventory_service.reserve_inventory(
        db, current_user.token_store_id, reservation
    )
    db.commit()
    return result


@router.post("/release", response_model=InventoryResponse)
def release_reservation(
    reservation: InventoryReserve,
    current_user: UserContext = Depends(get_current_store_api),
    db: Session = Depends(get_db),
):
    """Release reserved inventory (cancel order)."""
    result = inventory_service.release_reservation(
        db, current_user.token_store_id, reservation
    )
    db.commit()
    return result


@router.post("/fulfill", response_model=InventoryResponse)
def fulfill_reservation(
    reservation: InventoryReserve,
    current_user: UserContext = Depends(get_current_store_api),
    db: Session = Depends(get_db),
):
    """Fulfill reservation (complete order, remove from stock)."""
    result = inventory_service.fulfill_reservation(
        db, current_user.token_store_id, reservation
    )
    db.commit()
    return result


@router.get("/product/{product_id}", response_model=ProductInventorySummary)
def get_product_inventory(
    product_id: int,
    current_user: UserContext = Depends(get_current_store_api),
    db: Session = Depends(get_db),
):
    """Get inventory summary for a product."""
    return inventory_service.get_product_inventory(
        db, current_user.token_store_id, product_id
    )


@router.get("", response_model=InventoryListResponse)
def get_store_inventory(
    skip: int = Query(0, ge=0),
    limit: int = Query(100, ge=1, le=1000),
    location: str | None = Query(None),
    low_stock: int | None = Query(None, ge=0),
    current_user: UserContext = Depends(get_current_store_api),
    db: Session = Depends(get_db),
):
    """Get all inventory for store."""
    inventories = inventory_service.get_store_inventory(
        db, current_user.token_store_id, skip, limit, location, low_stock
    )

    # Get total count
    total = len(inventories)  # You might want a separate count query for large datasets

    return InventoryListResponse(
        inventories=inventories, total=total, skip=skip, limit=limit
    )


@router.put("/{inventory_id}", response_model=InventoryResponse)
def update_inventory(
    inventory_id: int,
    inventory_update: InventoryUpdate,
    current_user: UserContext = Depends(get_current_store_api),
    db: Session = Depends(get_db),
):
    """Update inventory entry."""
    result = inventory_service.update_inventory(
        db, current_user.token_store_id, inventory_id, inventory_update
    )
    db.commit()
    return result


@router.delete("/{inventory_id}", response_model=InventoryMessageResponse)
def delete_inventory(
    inventory_id: int,
    current_user: UserContext = Depends(get_current_store_api),
    db: Session = Depends(get_db),
):
    """Delete inventory entry."""
    inventory_service.delete_inventory(db, current_user.token_store_id, inventory_id)
    db.commit()
    return InventoryMessageResponse(message="Inventory deleted successfully")


# ============================================================================
# Inventory Transaction History Endpoints
# ============================================================================


@router.get("/transactions", response_model=InventoryTransactionListResponse)
def get_inventory_transactions(
    skip: int = Query(0, ge=0),
    limit: int = Query(50, ge=1, le=200),
    product_id: int | None = Query(None, description="Filter by product"),
    transaction_type: str | None = Query(None, description="Filter by type"),
    current_user: UserContext = Depends(get_current_store_api),
    db: Session = Depends(get_db),
):
    """
    Get inventory transaction history for the store.

    Returns a paginated list of all stock movements with product details.
    Use filters to narrow down by product or transaction type.
    """
    transactions, total = inventory_transaction_service.get_store_transactions(
        db=db,
        store_id=current_user.token_store_id,
        skip=skip,
        limit=limit,
        product_id=product_id,
        transaction_type=transaction_type,
    )

    return InventoryTransactionListResponse(
        transactions=[InventoryTransactionWithProduct(**tx) for tx in transactions],
        total=total,
        skip=skip,
        limit=limit,
    )


@router.get(
    "/transactions/product/{product_id}",
    response_model=ProductTransactionHistoryResponse,
)
def get_product_transaction_history(
    product_id: int,
    limit: int = Query(50, ge=1, le=200),
    current_user: UserContext = Depends(get_current_store_api),
    db: Session = Depends(get_db),
):
    """
    Get transaction history for a specific product.

    Returns recent stock movements with current inventory status.
    """
    result = inventory_transaction_service.get_product_history(
        db=db,
        store_id=current_user.token_store_id,
        product_id=product_id,
        limit=limit,
    )

    return ProductTransactionHistoryResponse(**result)


@router.get(
    "/transactions/order/{order_id}",
    response_model=OrderTransactionHistoryResponse,
)
def get_order_transaction_history(
    order_id: int,
    current_user: UserContext = Depends(get_current_store_api),
    db: Session = Depends(get_db),
):
    """
    Get all inventory transactions for a specific order.

    Shows all stock movements (reserve, fulfill, release) related to an order.
    """
    result = inventory_transaction_service.get_order_history(
        db=db,
        store_id=current_user.token_store_id,
        order_id=order_id,
    )

    return OrderTransactionHistoryResponse(
        order_id=result["order_id"],
        order_number=result["order_number"],
        transactions=[
            InventoryTransactionWithProduct(**tx) for tx in result["transactions"]
        ],
    )
