# app/services/team_service.py
"""
Team service for vendor team management.

This module provides:
- Team member invitation
- Role management
- Team member CRUD operations
"""

import logging
from typing import List, Dict, Any
from datetime import datetime, timezone

from sqlalchemy.orm import Session

from app.exceptions import (
    ValidationException,
    UnauthorizedVendorAccessException,
)
from models.database.vendor import VendorUser, Role
from models.database.user import User

logger = logging.getLogger(__name__)


class TeamService:
    """Service for team management operations."""

    def get_team_members(
            self, db: Session, vendor_id: int, current_user: User
    ) -> List[Dict[str, Any]]:
        """
        Get all team members for vendor.

        Args:
            db: Database session
            vendor_id: Vendor ID
            current_user: Current user

        Returns:
            List of team members
        """
        try:
            vendor_users = db.query(VendorUser).filter(
                VendorUser.vendor_id == vendor_id,
                VendorUser.is_active == True
            ).all()

            members = []
            for vu in vendor_users:
                members.append({
                    "id": vu.user_id,
                    "email": vu.user.email,
                    "first_name": vu.user.first_name,
                    "last_name": vu.user.last_name,
                    "role": vu.role.name,
                    "role_id": vu.role_id,
                    "is_active": vu.is_active,
                    "joined_at": vu.created_at,
                })

            return members

        except Exception as e:
            logger.error(f"Error getting team members: {str(e)}")
            raise ValidationException("Failed to retrieve team members")

    def invite_team_member(
            self, db: Session, vendor_id: int, invitation_data: dict, current_user: User
    ) -> Dict[str, Any]:
        """
        Invite a new team member.

        Args:
            db: Database session
            vendor_id: Vendor ID
            invitation_data: Invitation details
            current_user: Current user

        Returns:
            Invitation result
        """
        try:
            # TODO: Implement full invitation flow with email
            # For now, return placeholder
            return {
                "message": "Team invitation feature coming soon",
                "email": invitation_data.get("email"),
                "role": invitation_data.get("role"),
            }

        except Exception as e:
            logger.error(f"Error inviting team member: {str(e)}")
            raise ValidationException("Failed to invite team member")

    def update_team_member(
            self,
            db: Session,
            vendor_id: int,
            user_id: int,
            update_data: dict,
            current_user: User
    ) -> Dict[str, Any]:
        """
        Update team member role or status.

        Args:
            db: Database session
            vendor_id: Vendor ID
            user_id: User ID to update
            update_data: Update data
            current_user: Current user

        Returns:
            Updated member info
        """
        try:
            vendor_user = db.query(VendorUser).filter(
                VendorUser.vendor_id == vendor_id,
                VendorUser.user_id == user_id
            ).first()

            if not vendor_user:
                raise ValidationException("Team member not found")

            # Update fields
            if "role_id" in update_data:
                vendor_user.role_id = update_data["role_id"]

            if "is_active" in update_data:
                vendor_user.is_active = update_data["is_active"]

            vendor_user.updated_at = datetime.now(timezone.utc)
            db.commit()
            db.refresh(vendor_user)

            return {
                "message": "Team member updated successfully",
                "user_id": user_id,
            }

        except Exception as e:
            db.rollback()
            logger.error(f"Error updating team member: {str(e)}")
            raise ValidationException("Failed to update team member")

    def remove_team_member(
            self, db: Session, vendor_id: int, user_id: int, current_user: User
    ) -> bool:
        """
        Remove team member from vendor.

        Args:
            db: Database session
            vendor_id: Vendor ID
            user_id: User ID to remove
            current_user: Current user

        Returns:
            True if removed
        """
        try:
            vendor_user = db.query(VendorUser).filter(
                VendorUser.vendor_id == vendor_id,
                VendorUser.user_id == user_id
            ).first()

            if not vendor_user:
                raise ValidationException("Team member not found")

            # Soft delete
            vendor_user.is_active = False
            vendor_user.updated_at = datetime.now(timezone.utc)
            db.commit()

            logger.info(f"Removed user {user_id} from vendor {vendor_id}")
            return True

        except Exception as e:
            db.rollback()
            logger.error(f"Error removing team member: {str(e)}")
            raise ValidationException("Failed to remove team member")

    def get_vendor_roles(self, db: Session, vendor_id: int) -> List[Dict[str, Any]]:
        """
        Get available roles for vendor.

        Args:
            db: Database session
            vendor_id: Vendor ID

        Returns:
            List of roles
        """
        try:
            roles = db.query(Role).filter(Role.vendor_id == vendor_id).all()

            return [
                {
                    "id": role.id,
                    "name": role.name,
                    "permissions": role.permissions,
                }
                for role in roles
            ]

        except Exception as e:
            logger.error(f"Error getting vendor roles: {str(e)}")
            raise ValidationException("Failed to retrieve roles")


# Create service instance
team_service = TeamService()