'use client'

import Image from 'next/image'
import { PREVIEW_OPTIONAL_TYPES } from './upload-constants'

interface PreviewImageUploadProps {
  materialType: string
  previewImages: File[]
  previewUrls: string[]
  isPreviewDragging: boolean
  previewInputRef: React.RefObject<HTMLInputElement>
  previewDropZoneRef: React.RefObject<HTMLDivElement>
  disabled?: boolean
  onPreviewChange: (e: React.ChangeEvent<HTMLInputElement>) => void
  onPreviewDragEnter: (e: React.DragEvent) => void
  onPreviewDragLeave: (e: React.DragEvent) => void
  onPreviewDragOver: (e: React.DragEvent) => void
  onPreviewDrop: (e: React.DragEvent) => void
  onRemovePreviewImage: (index: number) => void
}

export default function PreviewImageUpload({
  materialType,
  previewImages,
  previewUrls,
  isPreviewDragging,
  previewInputRef,
  previewDropZoneRef,
  disabled = false,
  onPreviewChange,
  onPreviewDragEnter,
  onPreviewDragLeave,
  onPreviewDragOver,
  onPreviewDrop,
  onRemovePreviewImage,
}: PreviewImageUploadProps) {
  return (
    <div>
      <label className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">
        预览图片
        {PREVIEW_OPTIONAL_TYPES.includes(materialType) ? '（可选）' : ' *'}
      </label>
      <div
        ref={previewDropZoneRef}
        aria-disabled={disabled}
        className={`border-2 border-dashed rounded-apple p-4 transition-colors ${
          disabled ? 'cursor-not-allowed opacity-60' : ''
        } ${
          isPreviewDragging
            ? 'border-blue-500 bg-blue-50 dark:bg-blue-900/20'
            : 'border-gray-300 dark:border-gray-600'
        }`}
        onDragEnter={onPreviewDragEnter}
        onDragLeave={onPreviewDragLeave}
        onDragOver={onPreviewDragOver}
        onDrop={onPreviewDrop}
      >
        <input
          ref={previewInputRef}
          type="file"
          onChange={onPreviewChange}
          accept="image/*"
          multiple
          className="hidden"
          disabled={disabled}
        />
        <div className="grid grid-cols-4 gap-4">
          {previewUrls.map((url, index) => (
            <div key={index} className="relative group">
              <div className="relative w-full h-32 rounded-apple overflow-hidden border-2 border-gray-200 dark:border-gray-600">
                <Image
                  src={url}
                  alt={`预览图 ${index + 1}`}
                  fill
                  unoptimized
                  className="object-cover"
                />
                {index === 0 && (
                  <div className="absolute top-1 left-1 bg-blue-500 text-white text-xs px-2 py-1 rounded">
                    主预览图
                  </div>
                )}
              </div>
              <button
                type="button"
                onClick={() => onRemovePreviewImage(index)}
                disabled={disabled}
                className="absolute -top-2 -right-2 bg-red-500 text-white rounded-full w-6 h-6 flex items-center justify-center opacity-0 group-hover:opacity-100 transition-opacity"
              >
                ×
              </button>
            </div>
          ))}
          <button
            type="button"
            onClick={() => previewInputRef.current?.click()}
            disabled={disabled}
            className="group w-full h-32 rounded-apple bg-gray-100 dark:bg-gray-700 border-2 border-dashed border-gray-300 dark:border-gray-600 flex items-center justify-center hover:border-gray-400 dark:hover:border-gray-500 transition-colors"
          >
            <svg className="w-12 h-12 text-gray-400 group-hover:text-gray-500" fill="none" stroke="currentColor" viewBox="0 0 24 24">
              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 4v16m8-8H4" />
            </svg>
          </button>
        </div>
        <div className="mt-3 space-y-1">
          <p className="text-xs text-gray-500 dark:text-gray-400">
            支持 JPG、PNG、WebP 等格式，可一次选择多张或拖拽上传
          </p>
          <p className="text-xs text-blue-600 dark:text-blue-400">
            💡 第一张图会自动作为主预览图
          </p>
        </div>
      </div>
    </div>
  )
}