import assert from 'node:assert/strict';
import { readFileSync } from 'node:fs';
import { test } from 'node:test';
import vm from 'node:vm';
import ts from 'typescript';
import {
    assetConfig,
    resolvePreviewUrl,
    normalizePreviewImages,
} from '../miniprogram/config/assets.ts';

const legacyRoot =
    'cloud://cloud1-9gifs7a2756e2c87.636c-cloud1-9gifs7a2756e2c87-1351593184/';
const preview = 'assets/previews/math/number-find.jpg';
const expected = `https://cdn.joeyone.cn/doodle-assets/${preview}`;

test('预览图：旧 fileID 和云存储临时链接映射到统一七牛配置', () => {
    assert.equal(resolvePreviewUrl(`${legacyRoot}${preview}`), expected);
    assert.equal(
        resolvePreviewUrl(
            `https://636c-cloud1-9gifs7a2756e2c87-1351593184.tcb.qcloud.la/${preview}?sign=old&t=123`,
        ),
        expected,
    );
    assert.equal(resolvePreviewUrl(expected), expected);
    const previous = { ...assetConfig };
    try {
        assetConfig.publicDomain = 'https://assets.example.test';
        assetConfig.keyPrefix = 'next/';
        assert.equal(
            resolvePreviewUrl(`${legacyRoot}${preview}`),
            `https://assets.example.test/next/${preview}`,
        );
    } finally {
        Object.assign(assetConfig, previous);
    }
});

test('预览图：外部地址、本地图片和头像不替换，畸形预览不产生 CDN 请求', () => {
    for (const raw of [
        '/assets/local.png',
        'https://elsewhere.test/assets/previews/a.jpg',
        'https://636c-cloud1-9gifs7a2756e2c87-1351593184.tcb.qcloud.la.evil.test/assets/previews/a.jpg',
        `${legacyRoot}user-avatars/u.png`,
        'cloud://another-env/assets/previews/a.jpg',
        '',
    ])
        assert.equal(resolvePreviewUrl(raw), raw);
    for (const raw of [
        `${legacyRoot}assets/previews/../private.jpg`,
        `${legacyRoot}assets/previews/%2e%2e/private.jpg`,
        `${legacyRoot}assets/previews/%broken.jpg`,
    ])
        assert.equal(resolvePreviewUrl(raw), '');
    assert.equal(resolvePreviewUrl(null), '');
});

test('预览图：嵌套首页分区、收藏及下载记录转换且不修改原数据', () => {
    const raw = {
        home: {
            featured: [{ previewImg: `${legacyRoot}${preview}` }],
            sections: [{ items: [{ previewImg: `${legacyRoot}${preview}` }] }],
        },
        records: [{ worksheet: { previewImg: `${legacyRoot}${preview}` } }],
        avatarUrl: `${legacyRoot}user-avatars/u.png`,
    };
    const converted = normalizePreviewImages(raw);
    assert.equal(converted.home.featured[0].previewImg, expected);
    assert.equal(converted.home.sections[0].items[0].previewImg, expected);
    assert.equal(converted.records[0].worksheet.previewImg, expected);
    assert.equal(raw.home.featured[0].previewImg, `${legacyRoot}${preview}`);
    assert.equal(converted.avatarUrl, raw.avatarUrl);
});

test('首页配置：预拉取、旧 storage 缓存及新后端兜底均写回七牛预览图', async () => {
    const source = readFileSync(
        new URL('../miniprogram/app.ts', import.meta.url),
        'utf8',
    );
    const code = ts.transpileModule(source, {
        compilerOptions: {
            module: ts.ModuleKind.CommonJS,
            target: ts.ScriptTarget.ES2020,
        },
    }).outputText;
    for (const entry of ['prefetch', 'storage', 'backend']) {
        const old = {
            home: { featured: [{ previewImg: `${legacyRoot}${preview}` }] },
        };
        let app;
        let stored;
        const sandbox = {
            exports: {},
            getCurrentPages: () => [],
            require(name) {
                if (name === './services/site-api')
                    return { fetchPageConfig: async () => old };
                if (name === './config/assets')
                    return { normalizePreviewImages };
                return {};
            },
            App(definition) {
                app = definition;
            },
            wx: {
                getBackgroundFetchData({ success, fail }) {
                    if (entry === 'prefetch')
                        success({ fetchedData: JSON.stringify({ data: old }) });
                    else fail(new Error('not available'));
                },
                getStorageSync() {
                    return entry === 'storage' ? old : null;
                },
                setStorageSync(key, value) {
                    assert.equal(key, 'pageConfig');
                    stored = value;
                },
            },
        };
        vm.runInNewContext(code, sandbox);
        const waiting = app.getPageConfig();
        await app.loadPageConfig();
        assert.equal((await waiting).home.featured[0].previewImg, expected);
        assert.equal(
            app.globalData.pageConfig.home.featured[0].previewImg,
            expected,
        );
        assert.equal(stored.home.featured[0].previewImg, expected);
    }
});