# services/recipes/app/api/recipe_operations.py
"""
Recipe Operations API - Business operations and complex workflows
"""

from fastapi import APIRouter, Depends, HTTPException, Header, Query
from sqlalchemy.ext.asyncio import AsyncSession
from uuid import UUID
import logging

from ..core.database import get_db
from ..services.recipe_service import RecipeService
from ..schemas.recipes import (
    RecipeResponse,
    RecipeDuplicateRequest,
    RecipeFeasibilityResponse,
    RecipeStatisticsResponse,
)
from shared.routing import RouteBuilder, RouteCategory
from shared.auth.access_control import require_user_role
from shared.auth.decorators import get_current_user_dep

route_builder = RouteBuilder('recipes')
logger = logging.getLogger(__name__)
router = APIRouter(tags=["recipe-operations"])


def get_user_id(x_user_id: str = Header(...)) -> UUID:
    """Extract user ID from header"""
    try:
        return UUID(x_user_id)
    except ValueError:
        raise HTTPException(status_code=400, detail="Invalid user ID format")


@router.post(
    route_builder.build_custom_route(RouteCategory.BASE, ["{recipe_id}", "duplicate"]),
    response_model=RecipeResponse
)
@require_user_role(['admin', 'owner', 'member'])
async def duplicate_recipe(
    tenant_id: UUID,
    recipe_id: UUID,
    duplicate_data: RecipeDuplicateRequest,
    user_id: UUID = Depends(get_user_id),
    db: AsyncSession = Depends(get_db)
):
    """Create a duplicate of an existing recipe"""
    try:
        recipe_service = RecipeService(db)

        existing_recipe = recipe_service.get_recipe_with_ingredients(recipe_id)
        if not existing_recipe:
            raise HTTPException(status_code=404, detail="Recipe not found")

        if existing_recipe["tenant_id"] != str(tenant_id):
            raise HTTPException(status_code=403, detail="Access denied")

        result = await recipe_service.duplicate_recipe(
            recipe_id,
            duplicate_data.new_name,
            user_id
        )

        if not result["success"]:
            raise HTTPException(status_code=400, detail=result["error"])

        return RecipeResponse(**result["data"])

    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"Error duplicating recipe {recipe_id}: {e}")
        raise HTTPException(status_code=500, detail="Internal server error")


@router.post(
    route_builder.build_custom_route(RouteCategory.BASE, ["{recipe_id}", "activate"]),
    response_model=RecipeResponse
)
@require_user_role(['admin', 'owner', 'member'])
async def activate_recipe(
    tenant_id: UUID,
    recipe_id: UUID,
    user_id: UUID = Depends(get_user_id),
    db: AsyncSession = Depends(get_db)
):
    """Activate a recipe for production"""
    try:
        recipe_service = RecipeService(db)

        existing_recipe = await recipe_service.get_recipe_with_ingredients(recipe_id)
        if not existing_recipe:
            raise HTTPException(status_code=404, detail="Recipe not found")

        if existing_recipe["tenant_id"] != str(tenant_id):
            raise HTTPException(status_code=403, detail="Access denied")

        result = await recipe_service.activate_recipe(recipe_id, user_id)

        if not result["success"]:
            raise HTTPException(status_code=400, detail=result["error"])

        return RecipeResponse(**result["data"])

    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"Error activating recipe {recipe_id}: {e}")
        raise HTTPException(status_code=500, detail="Internal server error")


@router.get(
    route_builder.build_custom_route(RouteCategory.BASE, ["{recipe_id}", "feasibility"]),
    response_model=RecipeFeasibilityResponse
)
async def check_recipe_feasibility(
    tenant_id: UUID,
    recipe_id: UUID,
    batch_multiplier: float = Query(1.0, gt=0),
    db: AsyncSession = Depends(get_db)
):
    """Check if recipe can be produced with current inventory"""
    try:
        recipe_service = RecipeService(db)

        existing_recipe = await recipe_service.get_recipe_with_ingredients(recipe_id)
        if not existing_recipe:
            raise HTTPException(status_code=404, detail="Recipe not found")

        if existing_recipe["tenant_id"] != str(tenant_id):
            raise HTTPException(status_code=403, detail="Access denied")

        result = await recipe_service.check_recipe_feasibility(recipe_id, batch_multiplier)

        if not result["success"]:
            raise HTTPException(status_code=400, detail=result["error"])

        return RecipeFeasibilityResponse(**result["data"])

    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"Error checking recipe feasibility {recipe_id}: {e}")
        raise HTTPException(status_code=500, detail="Internal server error")


@router.get(
    route_builder.build_dashboard_route("statistics"),
    response_model=RecipeStatisticsResponse
)
@require_user_role(['viewer', 'member', 'admin', 'owner'])
async def get_recipe_statistics(
    tenant_id: UUID,
    current_user: dict = Depends(get_current_user_dep),
    db: AsyncSession = Depends(get_db)
):
    """Get recipe statistics for dashboard"""
    try:
        recipe_service = RecipeService(db)
        stats = await recipe_service.get_recipe_statistics(tenant_id)

        return RecipeStatisticsResponse(**stats)

    except Exception as e:
        logger.error(f"Error getting recipe statistics: {e}")
        raise HTTPException(status_code=500, detail="Internal server error")


@router.get(
    route_builder.build_custom_route(RouteCategory.BASE, ["categories", "list"])
)
async def get_recipe_categories(
    tenant_id: UUID,
    db: AsyncSession = Depends(get_db)
):
    """Get list of recipe categories used by tenant"""
    try:
        recipe_service = RecipeService(db)

        recipes = await recipe_service.search_recipes(tenant_id, limit=1000)
        categories = list(set(recipe["category"] for recipe in recipes if recipe["category"]))
        categories.sort()

        return {"categories": categories}

    except Exception as e:
        logger.error(f"Error getting recipe categories: {e}")
        raise HTTPException(status_code=500, detail="Internal server error")