import { getUser } from './auth';
import { apiRequest } from '../services/api-request';
import {
    legacyWorksheet,
    memberStats,
    type MemberPage,
} from '../services/member-api';
import { generateUUID } from './uuid';

export interface DownloadLogRecord {
    _id: string;
    worksheetId: string;
    exportId?: string | null;
    createdAt: string;
    worksheet?: {
        _id: string;
        title: string;
        subtitle: string;
        category: string;
        subcategory: string;
        path: string;
        ageMin?: number;
        ageMax?: number;
        difficulty?: number;
        previewImg: string;
    } | null;
}

/** 一次成功保存沿用同一个 exportId，服务端保证记录及下载计数幂等。 */
export async function addDownloadLog(
    worksheetId: string,
    exportId = generateUUID(),
    expectedUserId?: string,
): Promise<boolean> {
    if (!worksheetId) return false;
    try {
        const user = await getUser();
        if (expectedUserId && user.id !== expectedUserId) return false;
        await apiRequest('/me/downloads', {
            method: 'POST',
            data: { worksheetId, exportId },
        });
        return true;
    } catch {
        return false;
    }
}
export const DOWNLOAD_HISTORY_MAX = 30;
export async function getDownloadLogs(
    page = 1,
    pageSize = DOWNLOAD_HISTORY_MAX,
): Promise<DownloadLogRecord[]> {
    const result = await apiRequest<MemberPage>('/me/downloads', {
        data: { page, pageSize },
    });
    return result.items.map((row) => ({
        ...row,
        _id: row.id,
        worksheet: legacyWorksheet(row.worksheet),
    }));
}
export async function getDownloadLogCount(): Promise<number> {
    return (await memberStats()).downloadCount;
}