from django.contrib.auth import get_user_model
from rest_framework import serializers

from tasks.access import user_can_access_task_board
from tasks.models import TaskColumn

User = get_user_model()

DEFAULT_COLUMNS = [
    ("Новые", "#38bdf8", False),
    ("В работе", "#f59e0b", False),
    ("На проверке", "#8b5cf6", False),
    ("Готово", "#22c55e", True),
]


def create_default_columns(board):
    if board.columns.exists():
        return
    TaskColumn.objects.bulk_create(
        [
            TaskColumn(
                board=board,
                name=name,
                color=color,
                is_done=is_done,
                position=index * 1000,
            )
            for index, (name, color, is_done) in enumerate(DEFAULT_COLUMNS)
        ]
    )


def validate_board_access(serializer, board):
    request = serializer.context.get("request")
    user = getattr(request, "user", None)
    if not user_can_access_task_board(user, board):
        raise serializers.ValidationError("У вас нет доступа к этой доске.")
    return board