pages/index/index_v20_old.js

const plugin = requirePlugin("WechatSI");
const manager = plugin.getRecordRecognitionManager(); // Only one manager

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'], // Use short codes for internal logic
        sourceLang: 'zh',
        targetLang: 'en',
        transcript: '',
        outputText: '',
        isRecording: false,
        sourceLanguages: [],
        targetLanguages: [],
        hfSpaceUrl: 'https://dazaozi-wechat-translator-app.hf.space'
    },

    onLoad: function () {
        this.initializeLanguages();
        this.initRecordManager();
    },

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

    // --- Recorder Manager Initialization (Single Manager Mode) ---
    initRecordManager: function () {
        manager.onStart = () => {
            this.setData({ transcript: '正在聆听...', outputText: '' });
        };

        manager.onRecognize = (res) => {
            // Only update transcript for plugin-handled ASR (CN/EN)
            const { sourceLang } = this.data;
            if (sourceLang === 'zh' || sourceLang === 'en') {
                this.setData({ transcript: res.result });
            }
        };

        manager.onStop = (res) => {
            this.setData({ isRecording: false });
            const { sourceLang, targetLang } = this.data;
            const isChineseEnglish = (sourceLang === 'zh' && targetLang === 'en') || (sourceLang === 'en' && targetLang === 'zh');

            if (isChineseEnglish) {
                // Mode 1: Plugin handles both ASR and Translation
                if (res.result) {
                    this.setData({ transcript: res.result, outputText: res.translateResult || '' });
                } else {
                    this.setData({ transcript: '识别结果为空', outputText: '' });
                }
            } else {
                // Mode 2: Plugin handles ASR (if CN/EN), then HF handles translation
                if (res.result) { // res.result is the ASR result from plugin
                    this.setData({ transcript: res.result });
                    this.fullBackendBridge(res.result, this.data.sourceLang, this.data.targetLang);
                } else {
                    this.setData({ transcript: '识别结果为空' });
                }
            }
        };

        manager.onError = (res) => {
            this.setData({ isRecording: false, transcript: '识别失败', outputText: res.msg });
        };
    },

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

        this.setData({ isRecording: true });

        // CRITICAL: Check if source language is supported by plugin for ASR
        if (sourceLang !== 'zh' && sourceLang !== 'en') {
            wx.showToast({
                title: '当前源语言不支持语音输入',
                icon: 'none'
            });
            this.setData({ isRecording: false, transcript: '请选择中文或英文作为源语言' });
            return;
        }

        if (isChineseEnglish) {
            // Use plugin for ASR and Translation
            manager.start({
                lang: this.data.languages[sourceLang].code,
                trans_lang: this.data.languages[targetLang].code,
            });
        } else {
            // Use plugin for ASR only, then HF for translation
            manager.start({
                lang: this.data.languages[sourceLang].code,
                // No trans_lang here, as HF will handle translation
            });
        }
    },

    stopRecording: function () {
        manager.stop();
    },

    // --- HF Bridge Translation Flow (for non-CN/EN pairs) ---
    fullBackendBridge: function(text, sourceLang, targetLang) {
        this.setData({ outputText: '翻译中 (1/2)..' }); // Simplified steps
        // Step 1: Translate source (e.g., ZH) to English via HF
        this.translateViaHF(text, sourceLang, 'en', (englishResult) => {
            if (englishResult) {
                // Step 2: Translate English result to final target (e.g., JA) via HF
                this.setData({ outputText: '翻译中 (2/2)..' });
                this.translateViaHF(englishResult, 'en', targetLang, (finalResult) => {
                    if (finalResult) {
                        this.setData({ outputText: finalResult });
                    }
                });
            }
        });
    },

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