"""
User management API routes
"""

from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.ext.asyncio import AsyncSession
from typing import Dict, Any
import structlog

from app.core.database import get_db
from app.schemas.auth import UserResponse, PasswordChange
from app.schemas.users import UserUpdate
from app.services.user_service import UserService
from app.models.users import User

from sqlalchemy.ext.asyncio import AsyncSession

# Import unified authentication from shared library
from shared.auth.decorators import (
    get_current_user_dep,
    get_current_tenant_id_dep,
    require_role  # For admin-only endpoints
)

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

@router.get("/me", response_model=UserResponse)
async def get_current_user_info(
    current_user: Dict[str, Any] = Depends(get_current_user_dep),
    db: AsyncSession = Depends(get_db)
):
    """Get current user information"""
    try:
        # Handle both User object (direct auth) and dict (from gateway headers)
        if isinstance(current_user, dict):
            # Coming from gateway headers - need to fetch user from DB
            user_id = current_user.get("user_id")
            if not user_id:
                raise HTTPException(
                    status_code=status.HTTP_401_UNAUTHORIZED,
                    detail="Invalid user context"
                )
            
            # Fetch full user from database
            from sqlalchemy import select
            from app.models.users import User
            
            result = await db.execute(select(User).where(User.id == user_id))
            user = result.scalar_one_or_none()
            
            if not user:
                raise HTTPException(
                    status_code=status.HTTP_404_NOT_FOUND,
                    detail="User not found"
                )
            
            return UserResponse(
                id=str(user.id),
                email=user.email,
                full_name=user.full_name,
                is_active=user.is_active,
                is_verified=user.is_verified,
                phone=user.phone,
                language=user.language,
                timezone=user.timezone,
                created_at=user.created_at,
                last_login=user.last_login
            )
        else:
            # Direct User object (when called directly)
            return UserResponse(
                id=str(current_user.id),
                email=current_user.email,
                full_name=current_user.full_name,
                is_active=current_user.is_active,
                is_verified=current_user.is_verified,
                phone=current_user.phone,
                language=current_user.language,
                timezone=current_user.timezone,
                created_at=current_user.created_at,
                last_login=current_user.last_login
            )
    except Exception as e:
        logger.error(f"Get current user error: {e}")
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail="Failed to get user information"
        )

@router.put("/me", response_model=UserResponse)
async def update_current_user(
    user_update: UserUpdate,
    current_user: Dict[str, Any] = Depends(get_current_user_dep),
    db: AsyncSession = Depends(get_db)
):
    """Update current user information"""
    try:
        updated_user = await UserService.update_user(current_user.id, user_update, db)
        return UserResponse(
            id=str(updated_user.id),
            email=updated_user.email,
            full_name=updated_user.full_name,
            is_active=updated_user.is_active,
            is_verified=updated_user.is_verified,
            phone=updated_user.phone,
            language=updated_user.language,
            timezone=updated_user.timezone,
            created_at=updated_user.created_at,
            last_login=updated_user.last_login
        )
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"Update user error: {e}")
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail="Failed to update user"
        )