import assert from 'node:assert/strict';
import { readFile } from 'node:fs/promises';
import test from 'node:test';
import vm from 'node:vm';
import ts from 'typescript';

const loadModule = async (sandbox = {}) => {
  const service = await readFile(new URL('../src/services/speech-audio-source.ts', import.meta.url), 'utf8');
  const compiled = ts.transpileModule(service, {
    compilerOptions: { module: ts.ModuleKind.CommonJS, target: ts.ScriptTarget.ES2020 }
  });
  const runtimeModule = { exports: {} };
  vm.runInNewContext(compiled.outputText, {
    exports: runtimeModule.exports,
    module: runtimeModule,
    atob: (value) => Buffer.from(value, 'base64').toString('binary'),
    Blob,
    URL,
    Date,
    ...sandbox
  });
  return runtimeModule.exports;
};

// 'ID3' 是 mp3 文件头标识,base64 为 SUQz
const MP3_DATA_URI = `data:audio/mp3;base64,${Buffer.from('ID3\x04\x00\x00').toString('base64')}`;

test('识别音频 data: URI,拒绝 http URL 与非音频 data URI', async () => {
  const runtime = await loadModule();

  assert.equal(runtime.isDataAudioUri(MP3_DATA_URI), true);
  assert.equal(runtime.isDataAudioUri('data:audio/mpeg;base64,SUQz'), true);
  assert.equal(runtime.isDataAudioUri('https://example.com/a.mp3'), false);
  assert.equal(runtime.isDataAudioUri('data:image/png;base64,SUQz'), false);
  assert.equal(runtime.isDataAudioUri(''), false);
});

test('解码 data: URI 为字节,保留 mime 类型', async () => {
  const runtime = await loadModule();

  const decoded = runtime.decodeDataAudioUri(MP3_DATA_URI);

  assert.equal(decoded.mime, 'audio/mp3');
  assert.deepEqual(Array.from(decoded.bytes.slice(0, 3)), [0x49, 0x44, 0x33]);
  assert.equal(runtime.decodeDataAudioUri('data:audio/mp3;base64,!!!'), null);
  assert.equal(runtime.decodeDataAudioUri('not-a-data-uri'), null);
});

test('H5 环境转换为 Blob URL 并可回收', async () => {
  const created = [];
  const fakeURL = {
    createObjectURL: (blob) => {
      created.push(blob);
      return 'blob:mock-1';
    }
  };
  const runtime = await loadModule({ URL: fakeURL });

  const blobUrl = runtime.dataUriToBlobUrl(MP3_DATA_URI);

  assert.equal(blobUrl, 'blob:mock-1');
  assert.equal(created.length, 1);
  assert.equal(created[0].type, 'audio/mp3');
  assert.equal(created[0].size, 6);
});

// plus.io 的 FileWriter 只接受字符串。此前 mock 收 Blob 并断言 blob.type,
// 把错误契约固化成"通过":真机 writeAsBinary 从未被调用,落地 0 字节而单测全绿。
// 因此这里断言写入的是 base64 字符串本身,不是任何对象。
const nativePlus = (bytesWritten = (data) => Buffer.from(data, 'base64').length, writes = []) => ({
  io: {
    resolveLocalFileSystemURL: (path, ok) => {
      assert.equal(path, '_doc/');
      ok({
        getFile: (name, flags, onFile) => {
          assert.equal(flags.create, true);
          assert.match(name, /^aihr-tts-\d+\.mp3$/);
          let written = '';
          onFile({
            fullPath: `_doc/${name}`,
            file: (onMeta) => onMeta({ size: bytesWritten(written) }),
            createWriter: (onWriter) => onWriter({
              onwriteend: null,
              onerror: null,
              writeAsBinary(data) {
                written = data;
                writes.push(data);
                this.onwriteend();
              }
            })
          });
        }
      });
    },
    convertLocalFileSystemURL: (path) => `file:///storage/emulated/0/${path}`
  }
});

test('App 环境:base64 经 writeAsBinary 落盘后返回 file:// 播放路径', async () => {
  const writes = [];
  const runtime = await loadModule({ plus: nativePlus(undefined, writes) });

  const temp = await runtime.writeNativeTempAudio(MP3_DATA_URI);

  assert.match(temp.playbackUrl, /^file:\/\/\/storage\/emulated\/0\/_doc\/aihr-tts-\d+\.mp3$/);
  // 清理必须拿相对路径:传 file:// 绝对路径 resolveLocalFileSystemURL 解析不到,文件会堆积。
  assert.match(temp.plusPath, /^_doc\/aihr-tts-\d+\.mp3$/);
  assert.equal(writes.length, 1);
  assert.equal(typeof writes[0], 'string');
  assert.equal(writes[0], MP3_DATA_URI.split(',')[1]);
  assert.equal(runtime.hasNativeAudioFileSupport(), true);
});

test('App 环境:落盘 0 字节判为失败,不返回可播放路径', async () => {
  // 生产真机曾写出 9 个 0 字节 mp3:onwriteend 正常回调、路径正常返回,
  // InnerAudioContext 播空文件不报错,表现为界面正常但无声。必须在此拦掉。
  const runtime = await loadModule({ plus: nativePlus(() => 0) });

  assert.equal(await runtime.writeNativeTempAudio(MP3_DATA_URI), null);
});

test('清理临时音频:用相对路径解析并真的调用 remove()', async () => {
  const resolved = [];
  let removed = 0;
  const runtime = await loadModule({
    plus: {
      io: {
        resolveLocalFileSystemURL: (path, ok) => {
          resolved.push(path);
          ok({ remove: () => { removed += 1; } });
        },
        convertLocalFileSystemURL: (path) => `file:///storage/emulated/0/${path}`
      }
    }
  });

  runtime.removeNativeTempAudio('_doc/aihr-tts-123.mp3');

  assert.deepEqual(resolved, ['_doc/aihr-tts-123.mp3']);
  assert.equal(removed, 1);
});

test('提取 base64 载荷,拒绝空载荷与非音频 data URI', async () => {
  const runtime = await loadModule();

  const payload = runtime.extractAudioBase64(MP3_DATA_URI);
  assert.equal(payload.mime, 'audio/mp3');
  assert.equal(payload.base64, MP3_DATA_URI.split(',')[1]);
  assert.equal(runtime.extractAudioBase64('data:image/png;base64,SUQz'), null);
  assert.equal(runtime.extractAudioBase64('not-a-data-uri'), null);
});

test('App 环境:写盘失败或无 plus 环境时返回 null,清理尽力而为', async () => {
  const failingPlus = {
    io: {
      resolveLocalFileSystemURL: (path, ok, fail) => fail(new Error('io error')),
      convertLocalFileSystemURL: (path) => path
    }
  };
  const runtime = await loadModule({ plus: failingPlus });

  assert.equal(await runtime.writeNativeTempAudio(MP3_DATA_URI), null);

  const webRuntime = await loadModule();
  assert.equal(webRuntime.hasNativeAudioFileSupport(), false);
  assert.equal(await webRuntime.writeNativeTempAudio(MP3_DATA_URI), null);
  webRuntime.removeNativeTempAudio('file:///nonexistent.mp3');
});