import pLimit from 'p-limit';
import { PermissionService } from '../PermissionService';
import i18n from '@/i18n';
import { getUploadTaskStatus, insertUploadTask } from '../db';
import { getMediaByDateRange } from './media';
import { ExtendedAsset } from './types';
import { processAndUploadMedia } from './uploader';

// 设置最大并发数
const CONCURRENCY_LIMIT = 1; // 同时最多上传10个文件
const limit = pLimit(CONCURRENCY_LIMIT);

// 手动触发上传
export const triggerManualUpload = async (
    startDate: Date,
    endDate: Date,
    onProgress?: (progress: {
        totalCount: number;
        uploadedCount: number;
        totalBytes: number; // Overall total size
        uploadedBytes: number; // Overall uploaded size
        currentAsset: ExtendedAsset; // To show a thumbnail
    }) => void
) => {
    try {
        const media = await getMediaByDateRange(startDate, endDate);
        if (media.length === 0) {
            PermissionService.show({ title: i18n.t('permission:title.getMediaFailed'), message: i18n.t('permission:message.noMediaFound') });
            return [];
        }

        const progressMap = new Map<string, { loaded: number; total: number }>();

        const results = [];
        let uploadedCount = 0;

        for (const asset of media) {
            const existingTask = await getUploadTaskStatus(asset.uri);
            if (!existingTask) {
                await insertUploadTask({ uri: asset.uri, filename: asset.filename, status: 'pending', progress: 0 });
            } else if (existingTask.status === 'success' || existingTask.status === 'skipped') {
                console.log(`File ${asset.uri} already ${existingTask.status}, skipping processing.`);
                uploadedCount++; // Also count skipped files as 'processed'
                continue;
            }

            const result = await limit(() => processAndUploadMedia(asset, (fileProgress) => {
                progressMap.set(asset.uri, fileProgress);
                const uploadedBytes = Array.from(progressMap.values()).reduce((sum, p) => sum + p.loaded, 0);
                const totalBytes = Array.from(progressMap.values()).reduce((sum, p) => sum + p.total, 0);
                onProgress?.({
                    totalCount: media.length,
                    uploadedCount,
                    totalBytes,
                    uploadedBytes,
                    currentAsset: asset,
                });
            }));

            if (result) {
                results.push(result);
                if (result.originalSuccess) {
                    uploadedCount++;
                }
            }
        }

        // 过滤掉因为已上传而返回 null 的结果
        const finalResults = results.filter(result => result !== null);

        console.log('Manual upload completed.', {
            total: media.length,
            uploaded: finalResults.length,
            skipped: media.length - finalResults.length
        });

        return finalResults;
    } catch (error) {
        console.error('手动上传过程中出现错误:', error);
        PermissionService.show({ title: i18n.t('permission:title.error'), message: i18n.t('permission:message.uploadError') });
        throw error;
    }
};