# services/inventory/app/api/ingredients.py
"""
Base CRUD operations for inventory ingredients resources
Following standardized URL structure: /api/v1/tenants/{tenant_id}/inventory/{resource}
"""

from typing import List, Optional
from uuid import UUID
from fastapi import APIRouter, Depends, HTTPException, Query, Path, status
from sqlalchemy.ext.asyncio import AsyncSession

from app.core.database import get_db
from app.services.inventory_service import InventoryService
from app.schemas.inventory import (
    IngredientCreate,
    IngredientUpdate,
    IngredientResponse,
    StockResponse,
    StockCreate,
    StockUpdate,
)
from shared.auth.decorators import get_current_user_dep
from shared.auth.access_control import require_user_role, admin_role_required, owner_role_required
from shared.routing import RouteBuilder

# Create route builder for consistent URL structure
route_builder = RouteBuilder('inventory')

router = APIRouter(tags=["ingredients"])

# Helper function to extract user ID from user object
def get_current_user_id(current_user: dict = Depends(get_current_user_dep)) -> UUID:
    """Extract user ID from current user context"""
    user_id = current_user.get('user_id')
    if not user_id:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="User ID not found in context"
        )
    return UUID(user_id)


# ===== INGREDIENTS ENDPOINTS =====

@router.post(
    route_builder.build_base_route("ingredients"),
    response_model=IngredientResponse,
    status_code=status.HTTP_201_CREATED
)
@require_user_role(['admin', 'owner'])
async def create_ingredient(
    ingredient_data: IngredientCreate,
    tenant_id: UUID = Path(..., description="Tenant ID"),
    current_user: dict = Depends(get_current_user_dep),
    db: AsyncSession = Depends(get_db)
):
    """Create a new ingredient (Admin/Manager only)"""
    try:
        # Extract user ID - handle service tokens
        raw_user_id = current_user.get('user_id')
        if current_user.get('type') == 'service':
            user_id = None
        else:
            try:
                user_id = UUID(raw_user_id)
            except (ValueError, TypeError):
                user_id = None

        service = InventoryService()
        ingredient = await service.create_ingredient(ingredient_data, tenant_id, user_id)
        return ingredient
    except ValueError as e:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail=str(e)
        )
    except Exception as e:
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail="Failed to create ingredient"
        )


@router.get(
    route_builder.build_base_route("ingredients/count"),
    response_model=dict
)
async def count_ingredients(
    tenant_id: UUID = Path(...),
    current_user: dict = Depends(get_current_user_dep),
    db: AsyncSession = Depends(get_db)
):
    """Get count of ingredients for a tenant (All users)"""
    try:
        service = InventoryService()
        count = await service.count_ingredients_by_tenant(tenant_id)

        return {
            "tenant_id": str(tenant_id),
            "ingredient_count": count
        }

    except Exception as e:
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail=f"Failed to count ingredients: {str(e)}"
        )


@router.get(
    route_builder.build_resource_detail_route("ingredients", "ingredient_id"),
    response_model=IngredientResponse
)
async def get_ingredient(
    ingredient_id: UUID,
    tenant_id: UUID = Path(..., description="Tenant ID"),
    current_user: dict = Depends(get_current_user_dep),
    db: AsyncSession = Depends(get_db)
):
    """Get ingredient by ID (All users)"""
    try:
        service = InventoryService()
        ingredient = await service.get_ingredient(ingredient_id, tenant_id)

        if not ingredient:
            raise HTTPException(
                status_code=status.HTTP_404_NOT_FOUND,
                detail="Ingredient not found"
            )

        return ingredient
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail="Failed to get ingredient"
        )


@router.put(
    route_builder.build_resource_detail_route("ingredients", "ingredient_id"),
    response_model=IngredientResponse
)
@require_user_role(['admin', 'owner', 'member'])
async def update_ingredient(
    ingredient_id: UUID,
    ingredient_data: IngredientUpdate,
    tenant_id: UUID = Path(..., description="Tenant ID"),
    current_user: dict = Depends(get_current_user_dep),
    db: AsyncSession = Depends(get_db)
):
    """Update ingredient (Admin/Manager/User)"""
    try:
        service = InventoryService()
        ingredient = await service.update_ingredient(ingredient_id, ingredient_data, tenant_id)

        if not ingredient:
            raise HTTPException(
                status_code=status.HTTP_404_NOT_FOUND,
                detail="Ingredient not found"
            )

        return ingredient
    except ValueError as e:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail=str(e)
        )
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail="Failed to update ingredient"
        )


@router.get(
    route_builder.build_base_route("ingredients"),
    response_model=List[IngredientResponse]
)
async def list_ingredients(
    tenant_id: UUID = Path(..., description="Tenant ID"),
    skip: int = Query(0, ge=0, description="Number of records to skip"),
    limit: int = Query(100, ge=1, le=1000, description="Number of records to return"),
    category: Optional[str] = Query(None, description="Filter by category"),
    product_type: Optional[str] = Query(None, description="Filter by product type"),
    is_active: Optional[bool] = Query(None, description="Filter by active status"),
    is_low_stock: Optional[bool] = Query(None, description="Filter by low stock status"),
    needs_reorder: Optional[bool] = Query(None, description="Filter by reorder needed"),
    search: Optional[str] = Query(None, description="Search in name, SKU, or barcode"),
    current_user: dict = Depends(get_current_user_dep),
    db: AsyncSession = Depends(get_db)
):
    """List ingredients with filtering (All users)"""
    try:
        service = InventoryService()

        # Build filters
        filters = {}
        if category:
            filters['category'] = category
        if product_type:
            filters['product_type'] = product_type
        if is_active is not None:
            filters['is_active'] = is_active
        if is_low_stock is not None:
            filters['is_low_stock'] = is_low_stock
        if needs_reorder is not None:
            filters['needs_reorder'] = needs_reorder
        if search:
            filters['search'] = search

        ingredients = await service.get_ingredients(tenant_id, skip, limit, filters)
        return ingredients
    except Exception as e:
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail="Failed to list ingredients"
        )


@router.delete(
    route_builder.build_resource_detail_route("ingredients", "ingredient_id"),
    status_code=status.HTTP_204_NO_CONTENT
)
@admin_role_required
async def soft_delete_ingredient(
    ingredient_id: UUID,
    tenant_id: UUID = Path(..., description="Tenant ID"),
    current_user: dict = Depends(get_current_user_dep),
    db: AsyncSession = Depends(get_db)
):
    """Soft delete ingredient - mark as inactive (Admin only)"""
    try:
        service = InventoryService()
        result = await service.soft_delete_ingredient(ingredient_id, tenant_id)
        return None
    except ValueError as e:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=str(e)
        )
    except Exception as e:
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail="Failed to soft delete ingredient"
        )


@router.delete(
    route_builder.build_nested_resource_route("ingredients", "ingredient_id", "hard"),
    response_model=dict
)
@admin_role_required
async def hard_delete_ingredient(
    ingredient_id: UUID,
    tenant_id: UUID = Path(..., description="Tenant ID"),
    current_user: dict = Depends(get_current_user_dep),
    db: AsyncSession = Depends(get_db)
):
    """Hard delete ingredient and all associated data (Admin only)"""
    try:
        service = InventoryService()
        deletion_summary = await service.hard_delete_ingredient(ingredient_id, tenant_id)
        return deletion_summary
    except ValueError as e:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=str(e)
        )
    except Exception as e:
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail="Failed to hard delete ingredient"
        )


@router.get(
    route_builder.build_nested_resource_route("ingredients", "ingredient_id", "stock"),
    response_model=List[StockResponse]
)
async def get_ingredient_stock(
    ingredient_id: UUID,
    tenant_id: UUID = Path(..., description="Tenant ID"),
    include_unavailable: bool = Query(False, description="Include unavailable stock"),
    current_user: dict = Depends(get_current_user_dep),
    db: AsyncSession = Depends(get_db)
):
    """Get stock entries for an ingredient (All users)"""
    try:
        service = InventoryService()
        stock_entries = await service.get_stock_by_ingredient(
            ingredient_id, tenant_id, include_unavailable
        )
        return stock_entries
    except Exception as e:
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail="Failed to get ingredient stock"
        )