import assert from 'node:assert/strict';
import { readFileSync } from 'node:fs';
import { dirname, resolve } from 'node:path';
import vm from 'node:vm';
import { test } from 'node:test';
import ts from 'typescript';

const deferred = () => {
    let resolve;
    const promise = new Promise((done) => {
        resolve = done;
    });
    return { promise, resolve };
};
const tick = () => new Promise(setImmediate);

/** 加载真实配置、请求、认证、App 与切换流程，仅模拟微信运行时和服务端响应。 */
function fixture(storage = new Map()) {
    let version = 'develop';
    let app;
    let pages = [];
    let prefetchCalls = 0;
    let navigationCount = 0;
    let loginCount = 0;
    let handler = ({ url, environment }) => {
        if (url.endsWith('/auth/wechat/login')) {
            return {
                accessToken: `token-${environment}`,
                tokenType: 'Bearer',
                expiresIn: 86400,
                expiresAt: '2099-01-01T00:00:00Z',
                user: {
                    id: `user-${environment}`,
                    nickName: environment,
                    avatarUrl: null,
                    avatarUrlExpiresAt: null,
                    createdAt: '2026-10-19T00:00:00Z',
                },
            };
        }
        return { home: { marker: environment } };
    };
    const requests = [];
    const wx = {
        getAccountInfoSync: () => ({
            miniProgram: { appId: 'wx-env-test', envVersion: version },
        }),
        getStorageSync: (key) => storage.get(key),
        setStorageSync: (key, value) =>
            storage.set(key, structuredClone(value)),
        removeStorageSync: (key) => storage.delete(key),
        login({ success }) {
            loginCount++;
            success({ code: `code-${loginCount}` });
        },
        request(options) {
            send(options);
        },
        uploadFile(options) {
            send(options, true);
        },
        getBackgroundFetchData({ success }) {
            prefetchCalls++;
            success({
                fetchedData: JSON.stringify({
                    home: { marker: 'legacy-prefetch' },
                }),
            });
        },
        reLaunch({ url, success }) {
            assert.equal(url, '/pages/home/home');
            navigationCount++;
            const page = {
                route: 'pages/home/home',
                data: {},
                initData(config) {
                    this.data.config = config;
                },
            };
            pages = [page];
            void app.getPageConfig().then((config) => page.initData(config));
            success();
        },
    };
    function send(options, upload = false) {
        const request = {
            ...options,
            environment: load('config/api').getApiConfig().environment,
        };
        requests.push(request);
        Promise.resolve()
            .then(() => handler(request))
            .then(
                (data) => {
                    const body = { code: 0, data };
                    options.success({
                        statusCode: 200,
                        data: upload ? JSON.stringify(body) : body,
                    });
                },
                () => options.fail({}),
            );
    }
    const modules = new Map();
    const context = vm.createContext({
        wx,
        console,
        Error,
        getApp: () => app,
        getCurrentPages: () => pages,
        App(value) {
            app = value;
        },
    });
    function load(file) {
        file = resolve('miniprogram', file);
        if (!file.endsWith('.ts')) file += '.ts';
        if (modules.has(file)) return modules.get(file);
        const exports = {};
        modules.set(file, exports);
        const code = ts.transpileModule(readFileSync(file, 'utf8'), {
            compilerOptions: {
                module: ts.ModuleKind.CommonJS,
                target: ts.ScriptTarget.ES2020,
            },
        }).outputText;
        vm.runInContext(`(function(require,exports){${code}\n})`, context)(
            (name) => load(resolve(dirname(file), name)),
            exports,
        );
        return exports;
    }
    load('app');
    return {
        config: load('config/api'),
        auth: load('utils/auth'),
        api: load('services/api-request'),
        member: load('services/member-api'),
        switcher: load('services/environment-switch'),
        activity: load('services/api-activity'),
        app,
        wx,
        storage,
        requests,
        handle(fn) {
            handler = fn;
        },
        version(value) {
            version = value;
        },
        pages(value) {
            pages = value;
        },
        get currentPages() {
            return pages;
        },
        get prefetchCalls() {
            return prefetchCalls;
        },
        get navigationCount() {
            return navigationCount;
        },
        get loginCount() {
            return loginCount;
        },
    };
}

test('同址三环境仍隔离凭证与缓存；切换重建首页和个人状态，切回复用会话', async () => {
    const f = fixture(
        new Map([['pageConfig', { home: { marker: 'legacy-storage' } }]]),
    );
    await f.app.loadPageConfig();
    await f.auth.getUser();
    assert.equal(f.app.globalData.pageConfig.home.marker, 'local');
    const localConfig = f.config.getApiConfig();
    f.app.globalData.pendingCategoryTabId = 'math';
    for (const target of ['staging', 'production', 'local']) {
        await f.switcher.switchApiEnvironment(target);
        await tick();
        assert.equal(f.app.globalData.user.id, `user-${target}`);
        assert.equal(f.app.globalData.pageConfig.home.marker, target);
        assert.equal(f.currentPages[0].data.config.home.marker, target);
        assert.equal(f.app.globalData.pendingCategoryTabId, undefined);
    }
    assert.equal(f.loginCount, 3);
    assert.equal(f.navigationCount, 3);
    assert.equal(f.prefetchCalls, 0);
    assert.equal(f.config.isCurrentApiConfig(localConfig), false);
    const cacheKeys = [...f.storage.keys()].filter((key) =>
        key.startsWith('doodle_page_config_v2:'),
    );
    assert.equal(cacheKeys.length, 3);
    const authKeys = [...f.storage.keys()].filter((key) =>
        key.startsWith('doodle_auth_v2:'),
    );
    assert.equal(authKeys.length, 3);
    const restored = fixture(f.storage);
    assert.equal(restored.config.getApiConfig().environment, 'local');
    f.config.selectApiEnvironment('staging');
    assert.equal(
        fixture(f.storage).config.getApiConfig().environment,
        'staging',
    );
});

test('trial/release/未知包固定 production，不能通过缓存或切换入口覆盖；保留原预拉取', async () => {
    const f = fixture();
    f.config.selectApiEnvironment('staging');
    for (const version of ['trial', 'release', 'unknown']) {
        f.version(version);
        assert.equal(f.config.getApiConfig().environment, 'production');
        await assert.rejects(
            f.switcher.switchApiEnvironment('local'),
            /仅开发版/,
        );
        assert.throws(() => f.config.selectApiEnvironment('local'), /仅开发版/);
    }
    f.version('trial');
    await f.app.loadPageConfig();
    assert.equal(f.prefetchCalls, 1);
    assert.equal(f.app.globalData.pageConfig.home.marker, 'legacy-prefetch');
});

test('公开接口旧响应在 A→B→A 后仍作废；不会作为当前请求成功返回', async () => {
    const f = fixture();
    const gate = deferred();
    f.handle(() => gate.promise);
    const pending = f.api.apiRequest('/categories', { auth: 'none' });
    const rejected = assert.rejects(pending, /环境已变化/);
    await tick();
    f.config.selectApiEnvironment('staging');
    f.config.selectApiEnvironment('local');
    gate.resolve([]);
    await rejected;
});

test('写请求、上传及登录等待全过程禁止切换，完成后可切换', async () => {
    const f = fixture();
    await f.auth.getUser();
    const gate = deferred();
    f.handle(() => gate.promise);
    const pending = f.member.uploadAsset('/tmp/test.jpg', 'preview');
    await tick();
    assert.equal(f.activity.hasPendingApiWrites(), true);
    await assert.rejects(
        f.switcher.switchApiEnvironment('staging'),
        /等待当前保存或上传/,
    );
    assert.equal(f.config.getApiConfig().environment, 'local');
    gate.resolve({
        id: 'test-preview',
        url: 'https://example.test/preview.jpg',
    });
    await pending;
    assert.equal(f.activity.hasPendingApiWrites(), false);
    f.pages([{ data: { debugPublishLoading: true } }]);
    await assert.rejects(
        f.switcher.switchApiEnvironment('staging'),
        /等待当前保存或上传/,
    );
});

test('未配置地址与缓存写入失败不改变当前环境；目标连接失败不回退、不展示旧内容', async () => {
    const f = fixture();
    f.config.apiConfig.stagingBaseUrl = '';
    assert.equal(f.config.getApiEnvironmentOptions()[1].available, false);
    await assert.rejects(
        f.switcher.switchApiEnvironment('staging'),
        /配置 staging/,
    );
    assert.equal(f.config.getApiConfig().environment, 'local');
    f.config.apiConfig.stagingBaseUrl = f.config.apiConfig.localBaseUrl;
    const original = f.wx.setStorageSync;
    f.wx.setStorageSync = () => {
        throw new Error('storage full');
    };
    await assert.rejects(
        f.switcher.switchApiEnvironment('staging'),
        /storage full/,
    );
    assert.equal(f.config.getApiConfig().environment, 'local');
    f.wx.setStorageSync = original;
    f.app.globalData.pageConfig = { home: { marker: 'local-old' } };
    f.handle(() => {
        throw new Error('offline');
    });
    await assert.rejects(
        f.switcher.switchApiEnvironment('staging'),
        /目标接口连接失败/,
    );
    assert.equal(f.config.getApiConfig().environment, 'staging');
    assert.equal(f.app.globalData.pageConfig, undefined);
    assert.equal(f.currentPages[0].data.config, null);
});

test('旧首页初始化与登录迟到响应不污染切换后的共享状态，旧等待者被释放', async () => {
    const f = fixture();
    const gate = deferred();
    f.handle(({ environment, url }) => {
        if (environment === 'local') return gate.promise;
        if (url.endsWith('/page-config'))
            return { home: { marker: 'staging' } };
        throw new Error('skip login');
    });
    const waiter = f.app.getPageConfig();
    const pendingConfig = f.app.loadPageConfig();
    const pendingLogin = f.auth.getUser();
    const rejected = assert.rejects(pendingLogin, /环境已变化|登录状态已变化/);
    await tick();
    await f.switcher.switchApiEnvironment('staging');
    assert.equal(await waiter, null);
    gate.resolve({ home: { marker: 'old-local' } });
    await pendingConfig;
    await rejected;
    assert.equal(f.app.globalData.pageConfig.home.marker, 'staging');
    assert.equal(f.app.globalData.user, null);
});

test('配置变更使当前地址失效时仍能切走；写请求等待首次登录期间也禁止切换', async () => {
    const f = fixture();
    f.config.selectApiEnvironment('staging');
    f.config.apiConfig.stagingBaseUrl = '';
    assert.throws(() => f.config.getApiConfig(), /配置 staging/);
    const waiting = f.app.getPageConfig();
    assert.equal(await f.app.loadPageConfig(), false);
    assert.equal(await waiting, null);
    await f.switcher.switchApiEnvironment('local');
    assert.equal(f.config.getApiConfig().environment, 'local');
    const g = fixture();
    const gate = deferred();
    g.handle(({ url }) =>
        url.endsWith('/auth/wechat/login') ? gate.promise : {},
    );
    const write = g.api.apiRequest('/me/profile', {
        method: 'PUT',
        data: { nickName: 'test' },
    });
    await tick();
    assert.equal(
        g.requests.filter((row) => row.url.endsWith('/me/profile')).length,
        0,
    );
    await assert.rejects(
        g.switcher.switchApiEnvironment('staging'),
        /等待当前保存或上传/,
    );
    gate.resolve({
        accessToken: 'token-local',
        tokenType: 'Bearer',
        expiresIn: 86400,
        expiresAt: '2099-01-01T00:00:00Z',
        user: {
            id: 'user-local',
            nickName: null,
            avatarUrl: null,
            avatarUrlExpiresAt: null,
            createdAt: '2026-10-19T00:00:00Z',
        },
    });
    await write;
    assert.equal(g.activity.hasPendingApiWrites(), false);
});

test('Debug 页面调用统一切换入口，失败时隐藏 loading 后显示错误；非开发包拒绝操作', async () => {
    const f = fixture();
    let definition;
    let toasts = [];
    let loading = false;
    f.wx.showLoading = () => {
        loading = true;
    };
    f.wx.hideLoading = () => {
        loading = false;
    };
    f.wx.showToast = (options) => {
        assert.equal(loading, false);
        toasts.push(options.title);
    };
    const source = ts.transpileModule(
        readFileSync('miniprogram/supportPages/debug/debug.ts', 'utf8'),
        {
            compilerOptions: {
                module: ts.ModuleKind.CommonJS,
                target: ts.ScriptTarget.ES2020,
            },
        },
    ).outputText;
    vm.runInNewContext(source, {
        exports: {},
        wx: f.wx,
        Error,
        getCurrentPages: () => [definition],
        require(name) {
            return name === '../../config/api' ? f.config : f.switcher;
        },
        Page(value) {
            definition = {
                ...value,
                setData(value) {
                    Object.assign(this.data, value);
                },
            };
        },
    });
    definition.onLoad();
    definition.onShow();
    assert.equal(definition.data.currentEnvironment, 'local');
    f.config.apiConfig.stagingBaseUrl = '';
    await definition.onSelectEnvironment({
        currentTarget: { dataset: { environment: 'staging' } },
    });
    assert.match(toasts.at(-1), /配置 staging/);
    assert.equal(definition.data.isSwitchingEnvironment, false);
    f.version('trial');
    definition.onLoad();
    definition.onShow();
    assert.equal(definition.data.isDevEnv, false);
    assert.equal(definition.data.currentEnvironment, 'production');
    toasts = [];
    await definition.onSelectEnvironment({
        currentTarget: { dataset: { environment: 'local' } },
    });
    assert.equal(toasts.length, 0);
});