import { ref } from 'vue';

export function useAudioPlayer() {
    let audioContext = null;
    let audioQueue = [];
    let isPlaying = false;

    // 初始化AudioContext
    const initAudioContext = () => {
        if (!audioContext) {
            audioContext = new (window.AudioContext || window.webkitAudioContext)({
                sampleRate: 24000 // 匹配TTS采样率
            });
        }
    };

    // 播放音频块
    const playAudioChunk = async (base64Audio) => {

        // console.log('playAudioChunk=========', base64Audio);
        initAudioContext();

        // 解码Base64音频数据
        const audioBytes = Uint8Array.from(atob(base64Audio), c => c.charCodeAt(0));
        audioQueue.push(audioBytes);

        if (!isPlaying) {
            processAudioQueue();
        }
    };

    // 处理音频队列
    const processAudioQueue = async () => {
        if (audioQueue.length === 0) {
            isPlaying = false;
            return;
        }

        isPlaying = true;
        const audioData = audioQueue.shift();

        try {
            const audioBuffer = await audioContext.decodeAudioData(audioData.buffer);
            const source = audioContext.createBufferSource();
            source.buffer = audioBuffer;
            source.connect(audioContext.destination);
            source.start(0);

            // 播放完成后继续处理队列
            source.onended = processAudioQueue;
        } catch (error) {
            console.error('音频解码失败:', error);
            isPlaying = false;
        }
    };

    // 停止播放并清理
    const stopPlayback = () => {
        if (audioContext) {
            audioContext.close().then(() => {
                audioContext = null;
            });
        }
        audioQueue = [];
        isPlaying = false;
    };

    return {
        playAudioChunk,
        stopPlayback
    };
}