'use client'

import { useState } from 'react'
import Image from 'next/image'
import {
  STANDARD_MODEL_WHITE_BG_VIEWS,
  type StandardModelWhiteBgKey,
} from '@/lib/standard-model-white-background'

interface StandardModelWhiteBackgroundUploadProps {
  imageUrls: Partial<Record<StandardModelWhiteBgKey, string>>
  onSelectImage: (key: StandardModelWhiteBgKey, file: File) => void
  onRemoveImage: (key: StandardModelWhiteBgKey) => void
}

export default function StandardModelWhiteBackgroundUpload({
  imageUrls,
  onSelectImage,
  onRemoveImage,
}: StandardModelWhiteBackgroundUploadProps) {
  const [draggingKey, setDraggingKey] = useState<StandardModelWhiteBgKey | null>(null)

  const handleDragEnter = (event: React.DragEvent, key: StandardModelWhiteBgKey) => {
    event.preventDefault()
    event.stopPropagation()
    setDraggingKey(key)
  }

  const handleDragLeave = (event: React.DragEvent, key: StandardModelWhiteBgKey) => {
    event.preventDefault()
    event.stopPropagation()

    const rect = (event.currentTarget as HTMLElement).getBoundingClientRect()
    const { clientX, clientY } = event
    if (clientX <= rect.left || clientX >= rect.right || clientY <= rect.top || clientY >= rect.bottom) {
      if (draggingKey === key) {
        setDraggingKey(null)
      }
    }
  }

  const handleDragOver = (event: React.DragEvent) => {
    event.preventDefault()
    event.stopPropagation()
    event.dataTransfer.dropEffect = 'copy'
  }

  const handleDrop = (event: React.DragEvent, key: StandardModelWhiteBgKey) => {
    event.preventDefault()
    event.stopPropagation()
    setDraggingKey(null)

    const file = event.dataTransfer.files?.[0]
    if (!file) {
      return
    }

    onSelectImage(key, file)
  }

  return (
    <div>
      <p className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">
        产品白底图（6张） *
      </p>
      <div className="grid grid-cols-2 md:grid-cols-3 gap-4">
        {STANDARD_MODEL_WHITE_BG_VIEWS.map((view) => {
          const inputId = `white-bg-${view.key}`
          const imageUrl = imageUrls[view.key]
          const isDragging = draggingKey === view.key

          return (
            <div key={view.key} className="space-y-2">
              <p className="text-xs font-medium text-gray-700 dark:text-gray-300">{view.label}</p>
              <input
                id={inputId}
                type="file"
                accept="image/*"
                className="hidden"
                onChange={(event) => {
                  const file = event.target.files?.[0]
                  if (file) {
                    onSelectImage(view.key, file)
                  }
                  event.currentTarget.value = ''
                }}
              />
              {/* biome-ignore lint/a11y/noStaticElementInteractions: 上传槽位需要处理拖拽上传事件 */}
              <div
                className={`border-2 border-dashed rounded-apple p-3 transition-colors ${
                  isDragging
                    ? 'border-blue-500 bg-blue-50 dark:bg-blue-900/20'
                    : 'border-gray-300 dark:border-gray-600 bg-gray-50 dark:bg-gray-800/50 hover:border-gray-400 dark:hover:border-gray-500'
                }`}
                onDragEnter={(event) => handleDragEnter(event, view.key)}
                onDragLeave={(event) => handleDragLeave(event, view.key)}
                onDragOver={handleDragOver}
                onDrop={(event) => handleDrop(event, view.key)}
              >
                {imageUrl ? (
                  <div className="space-y-2">
                    <div className="relative w-full h-24 rounded-apple overflow-hidden border-2 border-gray-200 dark:border-gray-600">
                      <Image
                        src={imageUrl}
                        alt={view.label}
                        fill
                        unoptimized
                        className="object-cover"
                      />
                    </div>
                    <div className="flex gap-2">
                      <label
                        htmlFor={inputId}
                        className="flex-1 text-center text-xs px-2 py-1 rounded-apple bg-gray-200 dark:bg-gray-700 text-gray-800 dark:text-gray-200 hover:bg-gray-300 dark:hover:bg-gray-600 cursor-pointer transition-colors"
                      >
                        更换
                      </label>
                      <button
                        type="button"
                        className="text-xs px-2 py-1 rounded-apple bg-red-50 dark:bg-red-900/20 text-red-600 dark:text-red-400 hover:bg-red-100 dark:hover:bg-red-900/30 transition-colors"
                        onClick={() => onRemoveImage(view.key)}
                      >
                        删除
                      </button>
                    </div>
                    <p className="text-[11px] text-blue-600 dark:text-blue-400">支持拖拽图片替换</p>
                  </div>
                ) : (
                  <label
                    htmlFor={inputId}
                    className="group w-full h-24 rounded-apple bg-gray-100 dark:bg-gray-700 border-2 border-dashed border-gray-300 dark:border-gray-600 flex flex-col items-center justify-center hover:border-gray-400 dark:hover:border-gray-500 transition-colors cursor-pointer"
                  >
                    <svg className="w-5 h-5 text-gray-400 group-hover:text-gray-500" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                      <title>上传{view.label}</title>
                      <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 4v16m8-8H4" />
                    </svg>
                    <span className="mt-1 text-xs text-gray-500 dark:text-gray-400">拖拽或点击上传</span>
                  </label>
                )}
              </div>
            </div>
          )
        })}
      </div>
      <p className="mt-2 text-xs text-gray-500 dark:text-gray-400">
        白底图需一次上传完整6张，系统会自动打包为白底图压缩包用于下载。
      </p>
      <p className="mt-1 text-xs text-blue-600 dark:text-blue-400">
        💡 每个角度支持拖拽上传，拖入后会自动替换对应位置图片。
      </p>
    </div>
  )
}