'use client';

import React, { useMemo } from 'react';
import { TaskCard } from './TaskCard';
import type { LegacyKanbanBoard } from '@/types/kanban';

interface KanbanBoardProps {
  board: LegacyKanbanBoard;
}

// Legacy KanbanBoard component using old Kanban type
// For new Issue-based Kanban, use the page at /projects/[id]/kanban
export const KanbanBoard = React.memo(function KanbanBoard({ board }: KanbanBoardProps) {
  const totalTasks = useMemo(() => {
    return board.columns.reduce((acc, col) => acc + col.tasks.length, 0);
  }, [board.columns]);

  return (
    <div className="space-y-4">
      <div className="flex items-center justify-between">
        <h2 className="text-2xl font-bold">{board.projectName}</h2>
        <p className="text-sm text-muted-foreground">
          Total tasks: {totalTasks}
        </p>
      </div>
      <div className="flex gap-4 overflow-x-auto pb-4">
        {board.columns.map((column) => (
          <div
            key={column.status}
            className="flex min-w-[300px] flex-col rounded-lg border-2 bg-muted/50 p-4"
          >
            <div className="mb-4 flex items-center justify-between">
              <h3 className="font-semibold">{column.title}</h3>
              <span className="rounded-full bg-background px-2 py-0.5 text-xs font-medium">
                {column.tasks.length}
              </span>
            </div>
            <div className="flex-1 space-y-3">
              {column.tasks.map((task) => (
                <TaskCard key={task.id} task={task} />
              ))}
              {column.tasks.length === 0 && (
                <div className="flex h-32 items-center justify-center rounded-lg border-2 border-dashed border-muted-foreground/25">
                  <p className="text-sm text-muted-foreground">No tasks</p>
                </div>
              )}
            </div>
          </div>
        ))}
      </div>
      <p className="text-xs text-muted-foreground">
        Note: Drag-and-drop functionality will be implemented in Sprint 2
      </p>
    </div>
  );
});
