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

from fastapi import APIRouter, Depends, HTTPException, Header, Query, Path
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, analytics_tier_required
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
)
@analytics_tier_required
async def check_recipe_feasibility(
    tenant_id: UUID,
    recipe_id: UUID,
    batch_multiplier: float = Query(1.0, gt=0),
    current_user: dict = Depends(get_current_user_dep),
    db: AsyncSession = Depends(get_db)
):
    """
    Check if recipe can be produced with current inventory (Professional+ tier)
    Supports batch scaling for production planning
    """
    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")


@router.get(
    route_builder.build_custom_route(RouteCategory.BASE, ["count"])
)
async def get_recipe_count(
    tenant_id: UUID,
    x_internal_request: str = Header(None),
    db: AsyncSession = Depends(get_db)
):
    """
    Get total count of recipes for a tenant
    Internal endpoint for subscription usage tracking
    """
    if x_internal_request != "true":
        raise HTTPException(status_code=403, detail="Internal endpoint only")

    try:
        recipe_service = RecipeService(db)
        recipes = await recipe_service.search_recipes(tenant_id, limit=10000)
        count = len(recipes)

        return {"count": count}

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

# ============================================================================
# Tenant Data Deletion Operations (Internal Service Only)
# ============================================================================

from shared.auth.access_control import service_only_access
from shared.services.tenant_deletion import TenantDataDeletionResult
from app.services.tenant_deletion_service import RecipesTenantDeletionService


@router.delete(
    route_builder.build_base_route("tenant/{tenant_id}", include_tenant_prefix=False),
    response_model=dict
)
@service_only_access
async def delete_tenant_data(
    tenant_id: str = Path(..., description="Tenant ID to delete data for"),
    current_user: dict = Depends(get_current_user_dep),
    db: AsyncSession = Depends(get_db)
):
    """
    Delete all recipes data for a tenant (Internal service only)
    """
    try:
        logger.info("recipes.tenant_deletion.api_called", tenant_id=tenant_id)

        deletion_service = RecipesTenantDeletionService(db)
        result = await deletion_service.safe_delete_tenant_data(tenant_id)

        if not result.success:
            raise HTTPException(
                status_code=500,
                detail=f"Tenant data deletion failed: {', '.join(result.errors)}"
            )

        return {
            "message": "Tenant data deletion completed successfully",
            "summary": result.to_dict()
        }
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"recipes.tenant_deletion.api_error - tenant_id: {tenant_id}, error: {str(e)}", exc_info=True)
        raise HTTPException(status_code=500, detail=f"Failed to delete tenant data: {str(e)}")


@router.get(
    route_builder.build_base_route("tenant/{tenant_id}/deletion-preview", include_tenant_prefix=False),
    response_model=dict
)
@service_only_access
async def preview_tenant_data_deletion(
    tenant_id: str = Path(..., description="Tenant ID to preview deletion for"),
    current_user: dict = Depends(get_current_user_dep),
    db: AsyncSession = Depends(get_db)
):
    """
    Preview what data would be deleted for a tenant (dry-run)
    """
    try:
        logger.info(f"recipes.tenant_deletion.preview_called - tenant_id: {tenant_id}")

        deletion_service = RecipesTenantDeletionService(db)
        preview_data = await deletion_service.get_tenant_data_preview(tenant_id)
        result = TenantDataDeletionResult(tenant_id=tenant_id, service_name=deletion_service.service_name)
        result.deleted_counts = preview_data
        result.success = True

        if not result.success:
            raise HTTPException(
                status_code=500,
                detail=f"Tenant deletion preview failed: {', '.join(result.errors)}"
            )

        return {
            "tenant_id": tenant_id,
            "service": "recipes-service",
            "data_counts": result.deleted_counts,
            "total_items": sum(result.deleted_counts.values())
        }
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"recipes.tenant_deletion.preview_error - tenant_id: {tenant_id}, error: {str(e)}", exc_info=True)
        raise HTTPException(status_code=500, detail=f"Failed to preview tenant data deletion: {str(e)}")