from datetime import UTC, datetime

from flask import request
from flask_jwt_extended import jwt_required
from flask_pydantic import validate

from app import db
from app.decorators import load_board_owned, load_list_owned
from app.models import Board, List
from app.schemas import ListCreateRequest
from app.services.list_position_service import ListPositionService

from . import kanban_bp


@kanban_bp.route("/boards/<int:board_id>/lists", methods=["POST"])
@jwt_required()
@load_board_owned
@validate(body=ListCreateRequest)
def create_list(board_id, board, body: ListCreateRequest):
    """Create a new list in a board"""
    lst = List(
        name=body.name,
        board_id=board_id,
        pos=body.pos,
    )

    db.session.add(lst)
    db.session.commit()

    return lst.to_dict(), 201


@kanban_bp.route("/lists/<int:list_id>", methods=["PUT"])
@jwt_required()
@load_list_owned
@validate(body=ListCreateRequest)
def update_list(list_id, lst, body: ListCreateRequest):
    """Update a list"""
    lst.name = body.name
    if request.json.get("closed") is not None:
        lst.closed = request.json.get("closed")

    # Track if position is changing
    old_position = lst.pos
    new_position = body.pos

    if old_position != new_position:
        # Use ListPositionService to reorder lists
        ListPositionService.reorder_lists(lst.board_id, list_id, new_position)
    else:
        lst.pos = new_position
        db.session.commit()

    # Update board activity timestamp
    board = db.session.get(Board, lst.board_id)
    board.date_last_activity = datetime.now(UTC)

    return lst.to_dict(), 200


@kanban_bp.route("/lists/<int:list_id>", methods=["DELETE"])
@jwt_required()
@load_list_owned
def delete_list(list_id, lst):
    """Delete a list"""
    db.session.delete(lst)
    db.session.commit()

    return {"message": "List deleted"}, 200