import { addMaterial, confirmUpload, getUploadUrl } from '@/lib/background-uploader/api';
import { ConfirmUpload, ExifData, FileUploadItem, ImagesuploaderProps, UploadResult, UploadTask, defaultExifData } from '@/lib/background-uploader/types';
import { uploadFileWithProgress } from '@/lib/background-uploader/uploader';
import { compressImage } from '@/lib/image-process/imageCompress';
import { createVideoThumbnailFile } from '@/lib/video-process/videoThumbnail';
import * as ImagePicker from 'expo-image-picker';
import { requestLocationPermission, requestMediaLibraryPermission } from '@/components/owner/utils';
import { PermissionService } from '@/lib/PermissionService';
import * as MediaLibrary from 'expo-media-library';
import React, { useEffect, useState } from 'react';
import { Alert, Button, Platform, TouchableOpacity, View } from 'react-native';
import UploadPreview from './preview';

export const ImagesUploader: React.FC<ImagesuploaderProps> = ({
  children,
  style,
  compressQuality = 0.8,
  maxWidth = 2048,
  maxHeight = 2048,
  preserveExif = true,
  onUploadComplete,
  multipleChoice = false,
  showPreview = true,
  fileType = ['images'],
}) => {
  const [isLoading, setIsLoading] = useState(false);
  const [files, setFiles] = useState<FileUploadItem[]>([]);
  const [uploadQueue, setUploadQueue] = useState<FileUploadItem[]>([]);

  // 处理单个资源
  const processSingleAsset = async (asset: ImagePicker.ImagePickerAsset): Promise<UploadResult | null> => {
    console.log("asset111111", asset);

    const fileId = `file_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;
    const isVideo = asset.type === 'video';
    const uploadResults: UploadResult = {
      originalUrl: undefined,
      compressedUrl: '',
      file: null,
      exif: {},
      originalFile: {} as ConfirmUpload,
      compressedFile: {} as ConfirmUpload,
      thumbnail: '',
      thumbnailFile: {} as File,
    };
    // 创建上传项
    const newFileItem: FileUploadItem = {
      id: fileId,
      uri: asset.uri,
      previewUrl: asset.uri, // 使用 asset.uri 作为初始预览
      name: asset.fileName || 'file',
      progress: 0,
      status: 'uploading',
      error: undefined,
      type: isVideo ? 'video' : 'image',
      thumbnail: undefined,
    };

    setUploadQueue(prev => [...prev, newFileItem]);

    const updateProgress = (progress: number) => {
      setUploadQueue(prev =>
        prev.map(item =>
          item.id === fileId ? { ...item, progress } : item
        )
      );
    };

    try {
      let file: File;
      let thumbnailFile: File | null = null;
      let exifData: ExifData = { ...defaultExifData };

      if (isVideo) {
        // 处理视频文件
        file = new File(
          [await (await fetch(asset.uri)).blob()],
          `video_${Date.now()}.mp4`,
          { type: 'video/mp4' }
        );

        // 使用复用函数生成视频缩略图
        thumbnailFile = await createVideoThumbnailFile(asset, 300);
      } else {
        // 处理图片，主图和缩略图都用 compressImage 方法
        // 主图压缩（按 maxWidth/maxHeight/compressQuality）
        const { file: compressedFile } = await compressImage(asset.uri, maxWidth);
        // 缩略图压缩（宽度800）
        const { file: thumbFile } = await compressImage(asset.uri, 800);

        // 如果保留 EXIF 数据，则获取
        if (preserveExif && asset.exif) {
          exifData = { ...exifData, ...asset.exif };

          if (asset.uri && Platform.OS !== 'web') {
            try {
              const mediaAsset = await MediaLibrary.getAssetInfoAsync(asset.uri);
              if (mediaAsset.exif) {
                exifData = { ...exifData, ...mediaAsset.exif };
              }
              if (mediaAsset.location) {
                exifData.GPSLatitude = mediaAsset.location.latitude;
                exifData.GPSLongitude = mediaAsset.location.longitude;
              }
            } catch (error) {
              console.warn('从媒体库获取 EXIF 数据失败:', error);
            }
          }
        }
        // 用压缩后主图作为上传主文件
        file = compressedFile as File;
        // 用缩略图文件作为预览
        thumbnailFile = thumbFile as File;
      }

      // 准备上传任务
      const uploadTasks: UploadTask[] = [
        {
          file,
          metadata: {
            isCompressed: 'false',
            type: isVideo ? 'video' : 'image',
            ...(isVideo ? {} : exifData)
          }
        }
      ];

      if (thumbnailFile) {
        uploadTasks.push({
          file: thumbnailFile,
          metadata: {
            isCompressed: 'true',
            type: 'image',
            isThumbnail: 'true'
          }
        });
      }

      // 顺序上传文件
      const uploadResultsList = [];
      for (const task of uploadTasks) {
        try {
          // 统一通过 lib 的 uploadFileWithProgress 实现上传
          const uploadUrlData = await getUploadUrl(task.file, { ...task.metadata, GPSVersionID: undefined });
          const taskIndex = uploadTasks.indexOf(task);
          const totalTasks = uploadTasks.length;
          const baseProgress = (taskIndex / totalTasks) * 100;

          await uploadFileWithProgress(
            task.file,
            uploadUrlData.upload_url,
            (progress) => {
              const taskProgress = progress.total > 0 ? (progress.loaded / progress.total) * (100 / totalTasks) : 0;
              updateProgress(baseProgress + taskProgress);
            },
            30000
          );
          const result = await confirmUpload(uploadUrlData.file_id);
          uploadResultsList.push({ ...result, file_id: uploadUrlData.file_id, upload_url: uploadUrlData.upload_url });
        } catch (error) {
          console.error('Upload failed:', error);
          throw error;
        }
      }

      // 处理上传结果
      const [mainUpload, thumbnailUpload] = uploadResultsList;
      uploadResults.originalFile = mainUpload;
      uploadResults.compressedFile = thumbnailUpload || mainUpload;
      uploadResults.thumbnail = thumbnailUpload?.upload_url || '';
      uploadResults.thumbnailFile = thumbnailFile;

      // 更新上传状态
      updateProgress(100);
      setUploadQueue(prev =>
        prev.map(item =>
          item.id === fileId
            ? {
              ...item,
              status: 'success' as const,
              progress: 100,
              thumbnail: uploadResults.thumbnail
            }
            : item
        )
      );

      // 添加到素材库
      if (uploadResults.originalFile?.file_id) {
        await addMaterial(
          uploadResults.originalFile.file_id,
          uploadResults.compressedFile?.file_id
        );
      }

      return uploadResults;
    } catch (error) {
      console.error('Error processing file:', error);
      setUploadQueue(prev =>
        prev.map(item =>
          item.id === fileId
            ? {
              ...item,
              status: 'error' as const,
              error: error instanceof Error ? error.message : '上传失败'
            }
            : item
        )
      );
      return null;
    }
  };
  // 处理所有选中的图片
  const processAssets = async (assets: ImagePicker.ImagePickerAsset[]): Promise<UploadResult[]> => {
    // 设置最大并发数
    const CONCURRENCY_LIMIT = 3;
    const results: UploadResult[] = [];

    // 分批处理资源，优化并发处理
    const processBatch = async (batch: ImagePicker.ImagePickerAsset[]) => {
      const batchResults = await Promise.allSettled(
        batch.map(asset => processSingleAsset(asset))
      );
      
      // 收集成功的结果
      for (const result of batchResults) {
        if (result.status === 'fulfilled' && result.value) {
          results.push(result.value);
        }
      }
    };

    // 使用 Promise.all 并行处理所有批次
    const batches = [];
    for (let i = 0; i < assets.length; i += CONCURRENCY_LIMIT) {
      batches.push(assets.slice(i, i + CONCURRENCY_LIMIT));
    }
    
    // 并行处理所有批次，但限制并发数量
    for (let i = 0; i < batches.length; i += CONCURRENCY_LIMIT) {
      const batchGroup = batches.slice(i, i + CONCURRENCY_LIMIT);
      await Promise.all(batchGroup.map(processBatch));
    }

    return results;
  };

  // 处理图片选择
  const pickImage = async () => {
    try {
      setIsLoading(true);
      const hasMediaPermission = await requestMediaLibraryPermission();
      if (!hasMediaPermission) {
        setIsLoading(false);
        return;
      }
      // 请求位置权限，但不强制要求
      await requestLocationPermission();

      const result = await ImagePicker.launchImageLibraryAsync({
        mediaTypes: fileType,
        allowsMultipleSelection: multipleChoice,
        quality: 1,
        exif: preserveExif,
      });
      console.log("result", result?.assets);

      if (result.canceled || !result.assets) {
        setIsLoading(false);
        return;
      }

      try {
        const uploadResults = await processAssets(result.assets);

        // 所有文件处理完成后的回调
        // @ts-ignore
        onUploadComplete?.(uploadResults?.map((item, index) => {
          return {
            ...item,
            preview: result?.assets?.[index]?.uri
          }
        }));
      } catch (error) {
        PermissionService.show({ title: '错误', message: '部分文件处理失败，请重试' });
      } finally {
        setIsLoading(false);
      }

    } catch (error) {
      PermissionService.show({ title: '错误', message: '选择图片时出错，请重试' });
    } finally {
      setIsLoading(false);
    }
  };

  // 在组件卸载时清理已完成的上传
  useEffect(() => {
    return () => {
      // 只保留未完成的上传项
      setUploadQueue(prev =>
        prev.filter(item =>
          item.status === 'uploading' || item.status === 'pending'
        )
      );
    };
  }, []);


  return (
    <View style={[style]}>
      {children ? (
        <TouchableOpacity onPress={pickImage} disabled={isLoading} activeOpacity={0.7}>
          {children}
        </TouchableOpacity>
      ) : (
        <Button
          title={isLoading ? '处理中...' : '选择图片'}
          onPress={pickImage}
          disabled={isLoading}
        />
      )}

      {/* 上传预览 */}
      {showPreview && <UploadPreview items={uploadQueue} />}
    </View>
  );
};

export default ImagesUploader;