'use client';

import { useEffect, useRef } from 'react';
import { X, AlertTriangle } from 'lucide-react';
import { cn } from '@/lib/utils';

interface ConfirmDialogProps {
  isOpen: boolean;
  onClose: () => void;
  onConfirm: () => void;
  title: string;
  description?: string;
  confirmText?: string;
  cancelText?: string;
  variant?: 'default' | 'danger';
  loading?: boolean;
  children?: React.ReactNode;
}

export function ConfirmDialog({
  isOpen,
  onClose,
  onConfirm,
  title,
  description,
  confirmText = '确认',
  cancelText = '取消',
  variant = 'default',
  loading = false,
  children,
}: ConfirmDialogProps) {
  const dialogRef = useRef<HTMLDivElement>(null);

  // ESC 关闭
  useEffect(() => {
    const handleEscape = (e: KeyboardEvent) => {
      if (e.key === 'Escape' && isOpen && !loading) {
        onClose();
      }
    };

    document.addEventListener('keydown', handleEscape);
    return () => document.removeEventListener('keydown', handleEscape);
  }, [isOpen, onClose, loading]);

  // 点击外部关闭
  useEffect(() => {
    const handleClickOutside = (e: MouseEvent) => {
      if (
        dialogRef.current &&
        !dialogRef.current.contains(e.target as Node) &&
        !loading
      ) {
        onClose();
      }
    };

    if (isOpen) {
      document.addEventListener('mousedown', handleClickOutside);
    }

    return () => document.removeEventListener('mousedown', handleClickOutside);
  }, [isOpen, onClose, loading]);

  // 禁止背景滚动
  useEffect(() => {
    if (isOpen) {
      document.body.style.overflow = 'hidden';
    } else {
      document.body.style.overflow = '';
    }
    return () => {
      document.body.style.overflow = '';
    };
  }, [isOpen]);

  if (!isOpen) return null;

  return (
    <div className="fixed inset-0 z-50 flex items-center justify-center">
      {/* 背景遮罩 */}
      <div className="absolute inset-0 bg-black/50 animate-fade-in" />

      {/* 对话框 */}
      <div
        ref={dialogRef}
        className={cn(
          'relative z-10 w-full max-w-md mx-4',
          'bg-[var(--color-bg-primary)] rounded-lg shadow-xl',
          'animate-pop-up'
        )}
      >
        {/* 头部 */}
        <div className="flex items-center justify-between px-5 py-4 border-b border-[var(--color-border-light)]">
          <div className="flex items-center gap-3">
            {variant === 'danger' && (
              <div className="w-10 h-10 flex items-center justify-center rounded-full bg-red-500/10">
                <AlertTriangle className="w-5 h-5 text-red-500" />
              </div>
            )}
            <h3 className="text-lg font-semibold text-[var(--color-text-primary)]">
              {title}
            </h3>
          </div>
          <button
            onClick={onClose}
            disabled={loading}
            className="p-1 rounded-md text-[var(--color-text-tertiary)] hover:text-[var(--color-text-primary)] hover:bg-[var(--color-bg-hover)] transition-colors disabled:opacity-50"
          >
            <X size={20} />
          </button>
        </div>

        {/* 内容 */}
        <div className="px-5 py-4">
          {description && (
            <p className="text-sm text-[var(--color-text-secondary)] mb-4">
              {description}
            </p>
          )}
          {children}
        </div>

        {/* 底部按钮 */}
        <div className="flex justify-end gap-3 px-5 py-4 border-t border-[var(--color-border-light)] bg-[var(--color-bg-secondary)]">
          <button
            onClick={onClose}
            disabled={loading}
            className="px-4 py-2 text-sm font-medium text-[var(--color-text-secondary)] bg-[var(--color-bg-primary)] border border-[var(--color-border)] rounded-md hover:bg-[var(--color-bg-hover)] transition-colors disabled:opacity-50"
          >
            {cancelText}
          </button>
          <button
            onClick={onConfirm}
            disabled={loading}
            className={cn(
              'px-4 py-2 text-sm font-medium rounded-md transition-colors disabled:opacity-50',
              variant === 'danger'
                ? 'bg-red-600 text-white hover:bg-red-700'
                : 'bg-[var(--color-primary)] text-white hover:bg-[var(--color-primary-dark)]'
            )}
          >
            {loading ? (
              <span className="flex items-center gap-2">
                <svg
                  className="animate-spin h-4 w-4"
                  xmlns="http://www.w3.org/2000/svg"
                  fill="none"
                  viewBox="0 0 24 24"
                >
                  <circle
                    className="opacity-25"
                    cx="12"
                    cy="12"
                    r="10"
                    stroke="currentColor"
                    strokeWidth="4"
                  />
                  <path
                    className="opacity-75"
                    fill="currentColor"
                    d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"
                  />
                </svg>
                处理中...
              </span>
            ) : (
              confirmText
            )}
          </button>
        </div>
      </div>
    </div>
  );
}