'use client';

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

interface ModalProps {
  isOpen: boolean;
  onClose: () => void;
  children: React.ReactNode;
  /** 是否显示关闭按钮 */
  showCloseButton?: boolean;
  /** 点击遮罩是否关闭 */
  closeOnBackdrop?: boolean;
  /** 按 ESC 是否关闭 */
  closeOnEsc?: boolean;
  /** 自定义类名 */
  className?: string;
  /** 遮罩类名 */
  backdropClassName?: string;
  /** 内容区域最大宽度 */
  maxWidth?: string;
  /** 是否全屏 */
  fullScreen?: boolean;
}

export function Modal({
  isOpen,
  onClose,
  children,
  showCloseButton = true,
  closeOnBackdrop = true,
  closeOnEsc = true,
  className,
  backdropClassName,
  maxWidth = '800px',
  fullScreen = false,
}: ModalProps) {
  const contentRef = useRef<HTMLDivElement>(null);

  // ESC 关闭
  const handleKeyDown = useCallback(
    (e: KeyboardEvent) => {
      if (closeOnEsc && e.key === 'Escape') {
        onClose();
      }
    },
    [closeOnEsc, onClose]
  );

  // 绑定键盘事件
  useEffect(() => {
    if (isOpen) {
      document.addEventListener('keydown', handleKeyDown);
      // 禁止背景滚动
      document.body.style.overflow = 'hidden';
    }

    return () => {
      document.removeEventListener('keydown', handleKeyDown);
      document.body.style.overflow = '';
    };
  }, [isOpen, handleKeyDown]);

  // 点击遮罩关闭
  const handleBackdropClick = (e: React.MouseEvent) => {
    if (closeOnBackdrop && e.target === e.currentTarget) {
      onClose();
    }
  };

  if (!isOpen) return null;

  return (
    <div
      className={cn(
        'fixed inset-0 z-50 flex items-center justify-center',
        'bg-black/60 backdrop-blur-sm',
        'animate-fade-in-fast',
        backdropClassName
      )}
      onClick={handleBackdropClick}
      role="dialog"
      aria-modal="true"
    >
      {/* 内容区域 */}
      <div
        ref={contentRef}
        className={cn(
          'relative bg-[var(--color-bg-primary)] rounded-xl shadow-2xl',
          'animate-scale-in-fast',
          fullScreen ? 'w-full h-full rounded-none' : 'max-h-[90vh]',
          className
        )}
        style={!fullScreen ? { maxWidth } : undefined}
        onClick={(e) => e.stopPropagation()}
      >
        {/* 关闭按钮 */}
        {showCloseButton && (
          <button
            onClick={onClose}
            className={cn(
              'absolute top-3 right-3 z-10',
              'w-8 h-8 flex items-center justify-center rounded-full',
              'text-[var(--color-text-tertiary)] hover:text-[var(--color-text-primary)]',
              'hover:bg-[var(--color-bg-hover)] transition-colors duration-150'
            )}
            aria-label="关闭"
          >
            <X size={18} />
          </button>
        )}

        {children}
      </div>
    </div>
  );
}

// 添加动画样式到 globals.css
// 这里导出需要添加的 CSS
export const modalAnimationStyles = `
@keyframes fadeInFast {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes scaleInFast {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.animate-fade-in-fast {
  animation: fadeInFast 0.15s ease-out;
}

.animate-scale-in-fast {
  animation: scaleInFast 0.15s ease-out;
}
`;