import assert from 'node:assert/strict';
import fs from 'node:fs';
import os from 'node:os';
import path from 'node:path';
import { test } from 'node:test';

import JSZip from 'jszip';

import {
  defaultAppRoot,
  ensureNsisToolset,
  extractNsisArchive,
  NSIS_ARCHIVE_ASSET_NAME,
  NSIS_ARCHIVE_TOP_LEVEL_DIR,
  NSIS_REQUIRED_FILES,
  NSIS_TAURI_UTILS_ASSET_NAME,
  NSIS_TOOLSET_DIR_NAME,
  prepareNsisToolsetForRelease,
  resolveArchiveEntryTarget,
  resolveDownloadUrl,
  resolveNsisCacheDir,
  resolveTauriToolsDir,
  sha1Of,
  verifyNsisToolset,
} from './nsis-toolset.mjs';

const appRoot = defaultAppRoot();
const silentLogger = { log() {}, warn() {} };

function createSandbox() {
  return fs.mkdtempSync(path.join(os.tmpdir(), 'agc-nsis-toolset-'));
}

/** 与真实归档同构的最小 zip：只保留 bundler 必需文件。 */
async function createArchiveFixture(extraEntries = {}) {
  const zip = new JSZip();
  for (const relativePath of NSIS_REQUIRED_FILES) {
    zip.file(
      `${NSIS_ARCHIVE_TOP_LEVEL_DIR}/${relativePath}`,
      `fixture:${relativePath}`,
    );
  }
  for (const [name, contents] of Object.entries(extraEntries)) {
    zip.file(name, contents);
  }
  return zip.generateAsync({ type: 'nodebuffer' });
}

function fixtureAssets({ archive, utils }) {
  return [
    {
      assetName: NSIS_ARCHIVE_ASSET_NAME,
      url: `https://github.com/tauri-apps/binary-releases/releases/download/nsis-3.11/${NSIS_ARCHIVE_ASSET_NAME}`,
      sha1: sha1Of(archive),
    },
    {
      assetName: NSIS_TAURI_UTILS_ASSET_NAME,
      url: `https://github.com/tauri-apps/nsis-tauri-utils/releases/download/nsis_tauri_utils-v0.5.3/${NSIS_TAURI_UTILS_ASSET_NAME}`,
      sha1: sha1Of(utils),
    },
  ];
}

function fixtureFetch({ archive, utils, failures = 0 }) {
  let remainingFailures = failures;
  const calls = [];
  const fetchImpl = async (url) => {
    calls.push(url);
    if (remainingFailures > 0) {
      remainingFailures -= 1;
      throw new Error('network truncated');
    }
    const body = url.includes(NSIS_TAURI_UTILS_ASSET_NAME) ? utils : archive;
    return {
      ok: true,
      status: 200,
      statusText: 'OK',
      arrayBuffer: async () => body,
    };
  };
  return { fetchImpl, calls };
}

test('NSIS 工具链目录与 Tauri useLocalToolsDir 配置保持一致', () => {
  const config = JSON.parse(
    fs.readFileSync(
      path.join(appRoot, 'src-tauri', 'tauri.windows.conf.json'),
      'utf8',
    ),
  );
  assert.equal(config.bundle.useLocalToolsDir, true);
  assert.equal(
    resolveTauriToolsDir(appRoot),
    path.join(appRoot, 'src-tauri', 'target', '.tauri'),
  );
});

test('缓存目录默认落在工作区之外并支持环境变量覆盖', () => {
  assert.equal(
    resolveNsisCacheDir({ AGC_TAURI_NSIS_CACHE_DIR: 'D:\\agc-cache' }, 'win32'),
    'D:\\agc-cache',
  );
  assert.equal(
    resolveNsisCacheDir({ ProgramData: 'D:\\ProgramData' }, 'win32'),
    path.win32.join('D:\\ProgramData', 'genarrative', 'tauri-nsis-cache'),
  );
  assert.equal(
    resolveNsisCacheDir(
      { AGC_TAURI_NSIS_CACHE_DIR: '/tmp/agc-cache' },
      'linux',
    ),
    '/tmp/agc-cache',
  );
  assert.ok(
    resolveNsisCacheDir({}, 'linux').endsWith(
      path.posix.join('.cache', 'genarrative', 'tauri-nsis-cache'),
    ),
  );
});

test('下载地址支持 tauri bundler 的两套 GitHub 镜像开关', () => {
  const url =
    'https://github.com/tauri-apps/binary-releases/releases/download/nsis-3.11/nsis-3.11.zip';
  assert.equal(resolveDownloadUrl(url, {}), url);
  assert.equal(
    resolveDownloadUrl(url, {
      TAURI_BUNDLER_TOOLS_GITHUB_MIRROR_TEMPLATE:
        'https://mirror.example.com/<owner>/<repo>/<version>/<asset>',
    }),
    'https://mirror.example.com/tauri-apps/binary-releases/nsis-3.11/nsis-3.11.zip',
  );
  assert.equal(
    resolveDownloadUrl(url, {
      TAURI_BUNDLER_TOOLS_GITHUB_MIRROR: 'https://mirror.example.com/',
    }),
    `https://mirror.example.com/${url}`,
  );
});

test('工具链已就绪时零下载复用', async () => {
  const sandbox = createSandbox();
  const toolsDir = path.join(sandbox, '.tauri');
  const cacheDir = path.join(sandbox, 'cache');
  const archive = await createArchiveFixture();
  const utils = Buffer.from('nsis-tauri-utils-dll');
  const assets = fixtureAssets({ archive, utils });

  await ensureNsisToolset({
    toolsDir,
    cacheDir,
    assets,
    fetchImpl: fixtureFetch({ archive, utils }).fetchImpl,
    logger: silentLogger,
  });

  let fetchCalls = 0;
  const reused = await ensureNsisToolset({
    toolsDir,
    cacheDir,
    assets,
    fetchImpl: async () => {
      fetchCalls += 1;
      throw new Error('工具链已就绪时不应访问网络');
    },
    logger: silentLogger,
  });
  assert.equal(reused.reused, true);
  assert.deepEqual(reused.downloaded, []);
  assert.equal(fetchCalls, 0);
  assert.equal(reused.nsisDir, path.join(toolsDir, NSIS_TOOLSET_DIR_NAME));
});

test('冷启动时下载、校验、解压并落缓存，重跑走缓存', async () => {
  const sandbox = createSandbox();
  const toolsDir = path.join(sandbox, '.tauri');
  const cacheDir = path.join(sandbox, 'cache');
  const archive = await createArchiveFixture();
  const utils = Buffer.from('nsis-tauri-utils-dll');
  const assets = fixtureAssets({ archive, utils });
  const { fetchImpl, calls } = fixtureFetch({ archive, utils });

  const result = await ensureNsisToolset({
    toolsDir,
    cacheDir,
    assets,
    fetchImpl,
    logger: silentLogger,
  });
  assert.deepEqual(calls.length, 2);
  assert.deepEqual(result.downloaded, [
    NSIS_ARCHIVE_ASSET_NAME,
    NSIS_TAURI_UTILS_ASSET_NAME,
  ]);
  assert.equal(
    verifyNsisToolset(path.join(toolsDir, NSIS_TOOLSET_DIR_NAME), {
      utilsSha1: sha1Of(utils),
    }).ok,
    true,
  );
  assert.equal(
    fs.readFileSync(
      path.join(
        toolsDir,
        NSIS_TOOLSET_DIR_NAME,
        'Plugins/x86-unicode/additional/nsis_tauri_utils.dll',
      ),
      'utf8',
    ),
    'nsis-tauri-utils-dll',
  );

  // 第二次构建：清空工作区工具目录后仍应零下载恢复（模拟 Jenkins git clean -fdx）。
  fs.rmSync(path.join(toolsDir, NSIS_TOOLSET_DIR_NAME), {
    recursive: true,
    force: true,
  });
  const offline = await ensureNsisToolset({
    toolsDir,
    cacheDir,
    assets,
    fetchImpl: async () => {
      throw new Error('命中缓存时不应访问网络');
    },
    logger: silentLogger,
  });
  assert.equal(
    verifyNsisToolset(offline.nsisDir, { utilsSha1: sha1Of(utils) }).ok,
    true,
  );
});

test('下载失败按次数重试，最终成功', async () => {
  const sandbox = createSandbox();
  const archive = await createArchiveFixture();
  const utils = Buffer.from('dll');
  const { fetchImpl, calls } = fixtureFetch({ archive, utils, failures: 2 });
  const result = await ensureNsisToolset({
    toolsDir: path.join(sandbox, '.tauri'),
    cacheDir: path.join(sandbox, 'cache'),
    assets: fixtureAssets({ archive, utils }),
    fetchImpl,
    attempts: 3,
    retryDelayMs: 1,
    logger: silentLogger,
  });
  assert.equal(result.downloaded.length, 2);
  assert.equal(calls.length, 4);
});

test('哈希不匹配时报错并给出可操作提示', async () => {
  const sandbox = createSandbox();
  const { fetchImpl } = fixtureFetch({
    archive: Buffer.from('corrupted'),
    utils: Buffer.from('corrupted'),
  });
  await assert.rejects(
    ensureNsisToolset({
      toolsDir: path.join(sandbox, '.tauri'),
      cacheDir: path.join(sandbox, 'cache'),
      assets: [
        {
          assetName: NSIS_ARCHIVE_ASSET_NAME,
          url: 'https://github.com/a/b/releases/download/1/n.zip',
          sha1: 'deadbeef',
        },
        {
          assetName: NSIS_TAURI_UTILS_ASSET_NAME,
          url: 'https://github.com/a/b/releases/download/1/n.dll',
          sha1: 'deadbeef',
        },
      ],
      fetchImpl,
      attempts: 2,
      retryDelayMs: 1,
      logger: silentLogger,
    }),
    /SHA1 不匹配/u,
  );
  assert.equal(
    fs.existsSync(path.join(sandbox, 'cache', NSIS_ARCHIVE_ASSET_NAME)),
    false,
  );
});

test('归档越界路径与缺失必需文件都会失败关闭', async () => {
  const sandbox = createSandbox();
  assert.throws(
    () =>
      resolveArchiveEntryTarget(path.join(sandbox, 'extract'), '../escape.txt'),
    /越界路径/u,
  );
  assert.equal(
    resolveArchiveEntryTarget(path.join(sandbox, 'extract'), 'nsis-3.11/a/b'),
    path.resolve(sandbox, 'extract', 'nsis-3.11/a/b'),
  );

  const emptyArchive = new JSZip()
    .file(`${NSIS_ARCHIVE_TOP_LEVEL_DIR}/makensis.exe`, 'only-one')
    .generateAsync({ type: 'nodebuffer' });
  const emptyPath = path.join(sandbox, 'incomplete.zip');
  fs.writeFileSync(emptyPath, await emptyArchive);
  const toolsDir = path.join(sandbox, 'incomplete-tools');
  await extractNsisArchive(emptyPath, toolsDir);
  const status = verifyNsisToolset(
    path.join(toolsDir, NSIS_ARCHIVE_TOP_LEVEL_DIR),
  );
  assert.equal(status.ok, false);
  assert.ok(status.missing.includes('Bin/makensis.exe'));
});

test('非 Windows 目标或 --no-bundle 不预置工具链', async () => {
  let called = 0;
  const deps = {
    ensure: async () => {
      called += 1;
    },
  };
  assert.equal(
    await prepareNsisToolsetForRelease(
      { target: 'x86_64-pc-windows-msvc' },
      { bundling: false, ...deps },
    ),
    null,
  );
  assert.equal(
    await prepareNsisToolsetForRelease(
      { target: 'aarch64-apple-darwin' },
      deps,
    ),
    null,
  );
  assert.equal(called, 0);
});