// Fetch data from JSON file and initialize
fetch('BhagvatGlory.json')
    .then(response => response.json())
    .then(jsonData => initializeApp(jsonData))
    .catch(error => console.error('Error loading JSON:', error));

const skandaList = document.getElementById("skanda-list");
const chapterTitle = document.getElementById("chapter-title");
const slokeContainer = document.getElementById("sloke-container");

function initializeApp(data) {
    // Populate Skanda and Chapter List
    const skandaItem = document.createElement("li");
    skandaItem.textContent = data.skandaTitle;

    const chapterList = document.createElement("ul");
    data.chapters.forEach((chapter, chapterIndex) => {
        const chapterItem = document.createElement("li");
        chapterItem.textContent = chapter.chapterTitle;
        chapterItem.onclick = () => displayChapter(chapter);
        chapterList.appendChild(chapterItem);
    });

    skandaItem.appendChild(chapterList);
    skandaList.appendChild(skandaItem);
}

// Display Slokes
function displayChapter(chapter) {
    chapterTitle.textContent = chapter.chapterTitle;

    slokeContainer.innerHTML = "";
    const slokes = chapter.slokes
        .replace(/श्लोक\s*\d+:/g, "") // Remove "श्लोक-X"
        .trim()
        .split("\n"); // Split by newline

    slokes.forEach((sloke, index) => {
        const slokeItem = document.createElement("div");
        slokeItem.className = "sloke-item";

        const slokeText = document.createElement("p");
        slokeText.textContent = sloke.trim();

        const speakButton = document.createElement("button");
        speakButton.textContent = "Speak";
        speakButton.onclick = () => speakSloke(sloke.trim());

        const downloadButton = document.createElement("button");
        downloadButton.textContent = "Download";
        downloadButton.onclick = () => downloadAudio(sloke.trim(), `sloke-${index + 1}.wav`);

        slokeItem.appendChild(slokeText);
        slokeItem.appendChild(speakButton);
        slokeItem.appendChild(downloadButton);

        slokeContainer.appendChild(slokeItem);
    });
}


// Speak Sloke with Advanced Features
function speakSloke(text) {
    // Normalize and preprocess the text
    const normalizedText = text
        .normalize("NFC")
        .replace(/ऽ/g, " "); // Replace avagraha with a space for better pronunciation

    // Split the text into meaningful phrases
    const phrases = normalizedText.split(/[।॥]/).filter(phrase => phrase.trim().length > 0);

    let phraseIndex = 0;

    function speakNextPhrase() {
        if (phraseIndex >= phrases.length) return;

        const currentPhrase = phrases[phraseIndex].trim();
        const utterance = new SpeechSynthesisUtterance(currentPhrase);

        // Set voice and TTS parameters for a bold, heavy tone
        utterance.lang = "sa-IN";
        utterance.pitch = 0.8; // Lower pitch for a deeper, heavier voice
        utterance.rate = 0.8; // Slower rate for gravitas and clarity
        utterance.volume = 1.0; // Full volume for boldness

        // Select the male Sanskrit voice
        const voices = speechSynthesis.getVoices();
        utterance.voice = voices.find(voice => voice.lang === "sa-IN" && voice.name.includes("Male"));

        // Handle completion of the current phrase
        utterance.onend = () => {
            phraseIndex++;
            setTimeout(speakNextPhrase, 500); // Slightly longer pause for dramatic effect
        };

        // Handle errors gracefully
        utterance.onerror = (error) => {
            console.error(`Error speaking phrase: ${currentPhrase}`, error);
            phraseIndex++;
            setTimeout(speakNextPhrase, 500);
        };

        console.log(`Speaking phrase with bold voice: ${currentPhrase}`); // Debugging
        speechSynthesis.speak(utterance);
    }

    speakNextPhrase(); // Start speaking the sloke
}





// Speak Sloke
// function speakSloke(text) {
//     alert(text)
//     const utterance = new SpeechSynthesisUtterance(text);
//     utterance.lang = "sa-IN";
//     utterance.rate = 0.8;
//     utterance.pitch = 1.0;
//     const voices = speechSynthesis.getVoices();
//     utterance.voice = voices.find(voice => voice.lang === "sa-IN" && voice.name.includes("Male"));
//     speechSynthesis.speak(utterance);
// }

// Download Audio
function downloadAudio(text, filename) {
    const utterance = new SpeechSynthesisUtterance(text);
    utterance.lang = "sa-IN";

    const audioChunks = [];
    const streamDestination = new MediaStreamAudioDestinationNode(new AudioContext());
    const mediaRecorder = new MediaRecorder(streamDestination.stream);

    utterance.onstart = () => mediaRecorder.start();
    utterance.onend = () => {
        mediaRecorder.stop();
        const audioBlob = new Blob(audioChunks, { type: "audio/wav" });
        const audioUrl = URL.createObjectURL(audioBlob);

        const link = document.createElement("a");
        link.href = audioUrl;
        link.download = filename;
        link.click();
    };

    mediaRecorder.ondataavailable = event => audioChunks.push(event.data);
    speechSynthesis.speak(utterance);
}