// ============================================================
// upload-widgets — 单文件上传控件
// 合并自 ImageInput.tsx + VideoInput.tsx
//
// 两者共享 ~90% 的 enable_switch + Upload 模式，
// 差异仅在于：accept 类型、beforeUpload 校验、图标、默认 maxSize。
// 提取 useEnableSwitch() + SingleUpload 去重。
// ============================================================

import { useState, useCallback } from 'react';
import { Upload, Switch, Space, Typography } from 'antd';
import { UploadOutlined, VideoCameraOutlined } from '@ant-design/icons';
import type { UploadFile } from 'antd/es/upload';
import type { WidgetProps } from './types';
import { useFileUpload } from '@/shared/hooks/use-api';
import {
   buildAccept,
   buildVideoAccept,
   createMediaBeforeUpload,
   createVideoBeforeUpload,
} from '@/shared/utils/media-upload';

const { Text } = Typography;

// ════ enable_switch 共享 Hook ════

const ENABLED_EMPTY: UploadFile[] = [];

function useEnableSwitch(
   hasEnableSwitch: boolean,
   disabled: boolean,
   onChange: WidgetProps['onChange'],
) {
   const [switchOn, setSwitchOn] = useState(!hasEnableSwitch);
   const isUploadDisabled = disabled || !switchOn;

   const handleSwitchChange = useCallback(
      (on: boolean) => {
         setSwitchOn(on);
         if (!on) {
            onChange?.(undefined);
         } else {
            onChange?.(ENABLED_EMPTY as unknown as UploadFile[]);
         }
      },
      [onChange],
   );

   return { switchOn, isUploadDisabled, handleSwitchChange };
}

// ════ SingleUpload 内部组件 ════

interface SingleUploadProps {
   value: unknown;
   onChange: WidgetProps['onChange'];
   disabled: boolean;
   config: Record<string, unknown>;
   /** 'image' | 'video' */
   mediaType: 'image' | 'video';
   icon: React.ReactNode;
   uploadLabel: string;
   defaultMaxSizeMb: number;
}

function SingleUpload({
   value,
   onChange,
   disabled,
   config,
   mediaType,
   icon,
   uploadLabel,
   defaultMaxSizeMb,
}: SingleUploadProps) {
   const fileList = (value as UploadFile[]) || [];
   const maxSizeMb = (config.maxFileSizeMb as number) || defaultMaxSizeMb;
   const filters = config.fileFilter as string[] | undefined;
   const hasEnableSwitch = (config.enableSwitch as boolean) || false;

   const { customRequest } = useFileUpload();
   const { switchOn, isUploadDisabled, handleSwitchChange } = useEnableSwitch(hasEnableSwitch, disabled, onChange);

   const accept = mediaType === 'video'
      ? buildVideoAccept(filters)
      : buildAccept(filters);

   const beforeUpload = mediaType === 'video'
      ? createVideoBeforeUpload(maxSizeMb)
      : createMediaBeforeUpload(maxSizeMb, filters);

   return (
      <Space orientation="vertical" style={{ width: '100%' }} size={8}>
         {hasEnableSwitch && (
            <Space size={8}>
               <Switch size="small" checked={switchOn} onChange={handleSwitchChange} disabled={disabled} />
               <Text type={switchOn ? 'success' : 'secondary'} style={{ fontSize: 12 }}>
                  {switchOn ? '已启用' : '点击开关启用上传'}
               </Text>
            </Space>
         )}

         <Upload
            listType="picture-card"
            maxCount={1}
            accept={accept}
            fileList={fileList}
            customRequest={customRequest}
            onChange={({ fileList: newList }) => {
               if (switchOn || !hasEnableSwitch) onChange?.(newList as unknown as UploadFile[]);
            }}
            disabled={isUploadDisabled}
            beforeUpload={beforeUpload}
         >
            {fileList.length < 1 && (
               <div style={{ opacity: isUploadDisabled ? 0.4 : 1 }}>
                  {icon}
                  <div style={{ marginTop: 4, fontSize: 12 }}>{uploadLabel}</div>
               </div>
            )}
         </Upload>
      </Space>
   );
}

// ════ 公开导出（保持原组件名兼容 WIDGET_MAP） ════

export function ImageInput(props: WidgetProps) {
   const { value, onChange, disabled, config } = props;
   return (
      <SingleUpload
         value={value}
         onChange={onChange}
         disabled={disabled ?? false}
         config={config}
         mediaType="image"
         icon={<UploadOutlined />}
         uploadLabel="上传"
         defaultMaxSizeMb={10}
      />
   );
}

export function VideoInput(props: WidgetProps) {
   const { value, onChange, disabled, config } = props;
   return (
      <SingleUpload
         value={value}
         onChange={onChange}
         disabled={disabled ?? false}
         config={config}
         mediaType="video"
         icon={<VideoCameraOutlined />}
         uploadLabel="上传视频"
         defaultMaxSizeMb={50}
      />
   );
}