pages/index/index_v4_old.js

const plugin = requirePlugin('WechatSI');
const innerAudioContext = wx.createInnerAudioContext();
const pluginManager = plugin.getRecordRecognitionManager();

Page({
    data: {
        languages: {
            'zh': { name: '中文', flag: 'cn', code: 'zh_CN' },
            'en': { name: 'English', flag: 'us', code: 'en_US' },
            'ja': { name: '日本語', flag: 'jp', code: 'ja_JP' },
            'ko': { name: '한국어', flag: 'kr', code: 'ko_KR' }
        },
        langCodes: ['zh', 'en', 'ja', 'ko'],
        sourceLang: 'zh',
        targetLang: 'en',
        transcript: '',
        outputText: '',
        isRecording: false,
        sourceLanguages: [],
        targetLanguages: [],
        hfSpaceUrl: 'https://dazaozi-wechat-translator-app.hf.space',
        currentRecordMode: '' // 'plugin' or 'custom'
    },

    onLoad: function () {
        this.initializeLanguages();
        this.customRecorderManager = wx.getRecorderManager();
        this.initCustomRecorderManager();
        this.initPluginRecorderManager();
    },

    // --- Language Selection Logic ---
    initializeLanguages: function () {
        const { langCodes, languages, sourceLang, targetLang } = this.data;
        this.setData({
            sourceLanguages: langCodes.map(c => ({ ...languages[c], langCode: c, selected: c === sourceLang })),
            targetLanguages: langCodes.map(c => ({ ...languages[c], langCode: c, selected: c === targetLang }))
        });
    },
    selectSourceLanguage: function(e) { this.setData({ sourceLang: e.currentTarget.dataset.langCode }, this.initializeLanguages); },
    selectTargetLanguage: function(e) { this.setData({ targetLang: e.currentTarget.dataset.langCode }, this.initializeLanguages); },
    swapLanguages: function() {
        this.setData({
            sourceLang: this.data.targetLang,
            targetLang: this.data.sourceLang,
            transcript: this.data.outputText,
            outputText: this.data.transcript
        }, this.initializeLanguages);
    },

    // --- Recording Logic ---
    startRecording: function () {
        const { sourceLang, targetLang } = this.data;
        const isChineseEnglish = (sourceLang === 'zh' && targetLang === 'en') || (sourceLang === 'en' && targetLang === 'zh');

        this.setData({ isRecording: true, transcript: '正在聆听...', outputText: '' });

        if (isChineseEnglish) {
            this.setData({ currentRecordMode: 'plugin' });
            pluginManager.start({ lang: this.data.languages[sourceLang].code, translate: true, lto: this.data.languages[targetLang].code });
        } else {
            this.setData({ currentRecordMode: 'custom' });
            this.customRecorderManager.start({ duration: 60000, sampleRate: 16000, numberOfChannels: 1, encodeBitRate: 96000, format: 'mp3' });
        }
    },

    stopRecording: function () {
        if (this.data.currentRecordMode === 'plugin') {
            pluginManager.stop();
        } else if (this.data.currentRecordMode === 'custom') {
            this.customRecorderManager.stop();
        }
        this.setData({ isRecording: false });
    },

    // --- Result Handlers ---
    initPluginRecorderManager: function() {
        pluginManager.onRecognize = (res) => {
            this.setData({ transcript: res.result });
        };
        // CORRECTED: Use onTranslate to get translation results
        pluginManager.onTranslate = (res) => {
            this.setData({ outputText: res.result });
        };
        pluginManager.onStop = (res) => {
            this.setData({ transcript: res.result, outputText: res.translateResult });
        };
        pluginManager.onError = (res) => {
            this.setData({ transcript: '微信插件识别失败', outputText: res.msg });
        };
    },

    initCustomRecorderManager: function() {
        this.customRecorderManager.onStop = (res) => {
            if (res.tempFilePath) {
                this.uploadAudioForASR(res.tempFilePath);
            } else { this.setData({ transcript: '录音文件创建失败' }); }
        };
        this.customRecorderManager.onError = () => {
            this.setData({ transcript: '语音识别出错' });
        };
    },

    // --- Custom Translation Flow (for non-CN/EN pairs) ---
    uploadAudioForASR: function (filePath) {
        this.setData({ transcript: '正在识别 (1/3)...' });
        const fileSystemManager = wx.getFileSystemManager();
        fileSystemManager.readFile({ filePath, encoding: 'base64', success: (res) => {
            wx.request({
                url: `${this.data.hfSpaceUrl}/api/asr`,
                method: 'POST',
                header: { 'Content-Type': 'application/json' },
                data: { "audio_data_uri": `data:audio/mp3;base64,${res.data}` },
                timeout: 60000,
                success: (asrRes) => {
                    if (asrRes.statusCode === 200 && asrRes.data.transcript) {
                        const transcript = asrRes.data.transcript;
                        this.setData({ transcript });
                        // Start the full-backend translation bridge
                        this.fullBackendBridge(transcript, this.data.sourceLang, this.data.targetLang);
                    } else { this.setData({ transcript: 'HF识别失败' }); }
                },
                fail: () => { this.setData({ transcript: 'HF识别请求失败' }); }
            });
        }});
    },

    fullBackendBridge: function(text, sourceLang, targetLang) {
        // Step 1: Translate source (e.g., JA) to English via HF
        this.setData({ outputText: '翻译中 (2/3)..' });
        this.translateViaHF(text, sourceLang, 'en', (englishResult) => {
            if (englishResult) {
                // Step 2: Translate English result to final target (e.g., ZH) via HF
                this.setData({ outputText: '翻译中 (3/3)..' });
                this.translateViaHF(englishResult, 'en', targetLang, (finalResult) => {
                    if (finalResult) {
                        this.setData({ outputText: finalResult });
                    }
                });
            }
        });
    },

    translateViaHF: function(text, sourceLang, targetLang, callback) {
        wx.request({
            url: `${this.data.hfSpaceUrl}/api/translate`,
            method: 'POST',
            header: { 'Content-Type': 'application/json' },
            data: { "text": text, "source_lang": sourceLang, "target_lang": targetLang },
            timeout: 30000,
            success: (res) => {
                if (res.statusCode === 200 && res.data.translated_text) {
                    if (callback) {
                        callback(res.data.translated_text);
                    } else {
                        this.setData({ outputText: res.data.translated_text });
                    }
                } else {
                    this.setData({ outputText: `HF翻译失败 (${sourceLang}->${targetLang})` });
                    if (callback) callback(null); // Signal failure
                }
            },
            fail: () => {
                this.setData({ outputText: `HF翻译请求失败 (${sourceLang}->${targetLang})` });
                if (callback) callback(null); // Signal failure
            }
        });
    }
});