# services/suppliers/app/api/deliveries.py
"""
Delivery CRUD API endpoints (ATOMIC)
"""

from fastapi import APIRouter, Depends, HTTPException, Query, Path
from typing import List, Optional, Dict, Any
from uuid import UUID
import structlog

from sqlalchemy.orm import Session
from app.core.database import get_db
from app.services.delivery_service import DeliveryService
from app.schemas.suppliers import (
    DeliveryCreate, DeliveryUpdate, DeliveryResponse, DeliverySummary,
    DeliverySearchParams
)
from app.models.suppliers import DeliveryStatus
from shared.auth.decorators import get_current_user_dep
from shared.routing import RouteBuilder
from shared.auth.access_control import require_user_role

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


router = APIRouter(tags=["deliveries"])
logger = structlog.get_logger()


@router.post(route_builder.build_base_route("deliveries"), response_model=DeliveryResponse)
@require_user_role(['admin', 'owner', 'member'])
async def create_delivery(
    delivery_data: DeliveryCreate,
    current_user: Dict[str, Any] = Depends(get_current_user_dep),
    db: Session = Depends(get_db)
):
    """Create a new delivery"""
    # require_permissions(current_user, ["deliveries:create"])
    
    try:
        service = DeliveryService(db)
        delivery = await service.create_delivery(
            tenant_id=current_user["tenant_id"],
            delivery_data=delivery_data,
            created_by=current_user["user_id"]
        )
        return DeliveryResponse.from_orm(delivery)
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e))
    except Exception as e:
        logger.error("Error creating delivery", error=str(e))
        raise HTTPException(status_code=500, detail="Failed to create delivery")


@router.get(route_builder.build_base_route("deliveries"), response_model=List[DeliverySummary])
async def list_deliveries(
    supplier_id: Optional[UUID] = Query(None, description="Filter by supplier ID"),
    status: Optional[str] = Query(None, description="Filter by status"),
    date_from: Optional[str] = Query(None, description="Filter from date (YYYY-MM-DD)"),
    date_to: Optional[str] = Query(None, description="Filter to date (YYYY-MM-DD)"),
    search_term: Optional[str] = Query(None, description="Search term"),
    limit: int = Query(50, ge=1, le=1000, description="Number of results to return"),
    offset: int = Query(0, ge=0, description="Number of results to skip"),
    current_user: Dict[str, Any] = Depends(get_current_user_dep),
    db: Session = Depends(get_db)
):
    """List deliveries with optional filters"""
    # require_permissions(current_user, ["deliveries:read"])
    
    try:
        from datetime import datetime
        
        # Parse date filters
        date_from_parsed = None
        date_to_parsed = None
        if date_from:
            try:
                date_from_parsed = datetime.fromisoformat(date_from)
            except ValueError:
                raise HTTPException(status_code=400, detail="Invalid date_from format")
        
        if date_to:
            try:
                date_to_parsed = datetime.fromisoformat(date_to)
            except ValueError:
                raise HTTPException(status_code=400, detail="Invalid date_to format")
        
        # Validate status
        status_enum = None
        if status:
            try:
                status_enum = DeliveryStatus(status.upper())
            except ValueError:
                raise HTTPException(status_code=400, detail="Invalid status")
        
        service = DeliveryService(db)
        search_params = DeliverySearchParams(
            supplier_id=supplier_id,
            status=status_enum,
            date_from=date_from_parsed,
            date_to=date_to_parsed,
            search_term=search_term,
            limit=limit,
            offset=offset
        )
        
        deliveries = await service.search_deliveries(
            tenant_id=current_user["tenant_id"],
            search_params=search_params
        )
        
        return [DeliverySummary.from_orm(delivery) for delivery in deliveries]
    except HTTPException:
        raise
    except Exception as e:
        logger.error("Error listing deliveries", error=str(e))
        raise HTTPException(status_code=500, detail="Failed to retrieve deliveries")


@router.get(route_builder.build_resource_detail_route("deliveries", "delivery_id"), response_model=DeliveryResponse)
async def get_delivery(
    delivery_id: UUID = Path(..., description="Delivery ID"),
    current_user: Dict[str, Any] = Depends(get_current_user_dep),
    db: Session = Depends(get_db)
):
    """Get delivery by ID with items"""
    # require_permissions(current_user, ["deliveries:read"])
    
    try:
        service = DeliveryService(db)
        delivery = await service.get_delivery(delivery_id)
        
        if not delivery:
            raise HTTPException(status_code=404, detail="Delivery not found")
        
        # Check tenant access
        if delivery.tenant_id != current_user["tenant_id"]:
            raise HTTPException(status_code=403, detail="Access denied")
        
        return DeliveryResponse.from_orm(delivery)
    except HTTPException:
        raise
    except Exception as e:
        logger.error("Error getting delivery", delivery_id=str(delivery_id), error=str(e))
        raise HTTPException(status_code=500, detail="Failed to retrieve delivery")


@router.put(route_builder.build_resource_detail_route("deliveries", "delivery_id"), response_model=DeliveryResponse)
@require_user_role(['admin', 'owner', 'member'])
async def update_delivery(
    delivery_data: DeliveryUpdate,
    delivery_id: UUID = Path(..., description="Delivery ID"),
    current_user: Dict[str, Any] = Depends(get_current_user_dep),
    db: Session = Depends(get_db)
):
    """Update delivery information"""
    # require_permissions(current_user, ["deliveries:update"])
    
    try:
        service = DeliveryService(db)
        
        # Check delivery exists and belongs to tenant
        existing_delivery = await service.get_delivery(delivery_id)
        if not existing_delivery:
            raise HTTPException(status_code=404, detail="Delivery not found")
        if existing_delivery.tenant_id != current_user["tenant_id"]:
            raise HTTPException(status_code=403, detail="Access denied")
        
        delivery = await service.update_delivery(
            delivery_id=delivery_id,
            delivery_data=delivery_data,
            updated_by=current_user["user_id"]
        )
        
        if not delivery:
            raise HTTPException(status_code=404, detail="Delivery not found")
        
        return DeliveryResponse.from_orm(delivery)
    except HTTPException:
        raise
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e))
    except Exception as e:
        logger.error("Error updating delivery", delivery_id=str(delivery_id), error=str(e))
        raise HTTPException(status_code=500, detail="Failed to update delivery")