@extends('layouts.app')

@section('title', 'AI 나레이션 제작')

@section('content')
<!-- 페이지 헤더 -->
<div class="flex justify-between items-center mb-6">
    <h1 class="text-2xl font-bold text-gray-800 flex items-center gap-2">
        <i class="ri-music-2-line text-indigo-600"></i>
        AI 나레이션 제작
    </h1>
    <a href="{{ route('rd.cm-song.index') }}" class="bg-white hover:bg-gray-100 text-gray-700 px-4 py-2 rounded-lg border transition">
        <i class="ri-arrow-left-line mr-1"></i> 나레이션 목록
    </a>
</div>

<!-- 메인 콘텐츠 -->
<div class="grid grid-cols-1 lg:grid-cols-2 gap-6">
    <!-- 입력 섹션 -->
    <div class="bg-white rounded-xl shadow-sm border border-gray-100 p-6">
        <h2 class="text-lg font-semibold text-gray-800 mb-5 flex items-center gap-2">
            <i class="ri-edit-line text-indigo-500"></i>
            나레이션 정보 입력
        </h2>

        <div class="space-y-5">
            <!-- 회사명 -->
            <div>
                <label class="block text-sm font-medium text-gray-700 mb-1.5 flex items-center gap-1.5">
                    <i class="ri-building-line text-gray-400"></i>
                    회사명 / 브랜드명
                </label>
                <input
                    type="text"
                    id="companyName"
                    value="코드브릿지엑스"
                    placeholder="예: 코드브릿지엑스"
                    class="w-full px-4 py-3 rounded-lg border border-gray-200 focus:ring-2 focus:ring-indigo-500 focus:border-indigo-500 transition outline-none"
                />
            </div>

            <!-- 업종/제품 -->
            <div>
                <label class="block text-sm font-medium text-gray-700 mb-1.5 flex items-center gap-1.5">
                    <i class="ri-briefcase-line text-gray-400"></i>
                    업종 / 주요 제품
                </label>
                <input
                    type="text"
                    id="industry"
                    value="ERP 솔루션, 스마트 공장 자동화"
                    placeholder="예: ERP 솔루션, 스마트 공장 자동화"
                    class="w-full px-4 py-3 rounded-lg border border-gray-200 focus:ring-2 focus:ring-indigo-500 focus:border-indigo-500 transition outline-none"
                />
            </div>

            <!-- 분위기 선택 -->
            <div>
                <label class="block text-sm font-medium text-gray-700 mb-1.5 flex items-center gap-1.5">
                    <i class="ri-emotion-happy-line text-gray-400"></i>
                    원하는 분위기
                </label>
                <div class="grid grid-cols-2 gap-3" id="moodSelector">
                    <button type="button" data-mood="신나는" class="mood-btn selected py-2.5 px-4 rounded-lg text-sm font-medium transition border-2 border-indigo-200 bg-indigo-50 text-indigo-700">
                        신나는
                    </button>
                    <button type="button" data-mood="신뢰감 있는" class="mood-btn py-2.5 px-4 rounded-lg text-sm font-medium transition border-2 border-gray-100 bg-white text-gray-600 hover:border-gray-200">
                        신뢰감 있는
                    </button>
                    <button type="button" data-mood="감성적인" class="mood-btn py-2.5 px-4 rounded-lg text-sm font-medium transition border-2 border-gray-100 bg-white text-gray-600 hover:border-gray-200">
                        감성적인
                    </button>
                    <button type="button" data-mood="유머러스한" class="mood-btn py-2.5 px-4 rounded-lg text-sm font-medium transition border-2 border-gray-100 bg-white text-gray-600 hover:border-gray-200">
                        유머러스한
                    </button>
                </div>
            </div>

            <!-- 나레이션 길이 슬라이더 -->
            <div>
                <label class="block text-sm font-medium text-gray-700 mb-1.5 flex items-center gap-1.5">
                    <i class="ri-time-line text-gray-400"></i>
                    나레이션 길이
                </label>
                <div class="flex items-center gap-4">
                    <input
                        type="range"
                        id="durationSlider"
                        min="10"
                        max="60"
                        step="5"
                        value="15"
                        class="flex-1 h-2 bg-gray-200 rounded-lg appearance-none cursor-pointer accent-indigo-600"
                    />
                    <span id="durationDisplay" class="px-3 py-1 bg-indigo-50 text-indigo-700 text-sm font-semibold rounded-lg whitespace-nowrap" style="min-width: 52px; text-align: center;">15초</span>
                </div>
                <div class="flex justify-between text-xs text-gray-400 mt-1 px-0.5">
                    <span>10초</span>
                    <span>30초</span>
                    <span>60초</span>
                </div>
            </div>

            <!-- 생성 버튼 -->
            <button
                type="button"
                id="generateBtn"
                class="w-full py-3.5 bg-indigo-600 hover:bg-indigo-700 disabled:bg-gray-300 disabled:cursor-not-allowed text-white rounded-lg font-medium flex items-center justify-center gap-2 transition shadow-sm hover:shadow-md"
            >
                <i class="ri-sparkling-line"></i>
                나레이션 제작
            </button>
        </div>
    </div>

    <!-- 결과 섹션 -->
    <div id="resultPanel" class="bg-white rounded-xl shadow-sm border border-gray-100 p-6 flex flex-col">
        <h2 class="text-lg font-semibold text-gray-800 mb-5 flex items-center gap-2">
            <i class="ri-music-2-line text-indigo-500"></i>
            생성된 나레이션
        </h2>

        <div class="flex-1 flex flex-col justify-center" id="resultArea">
            <!-- 초기 상태 -->
            <div id="emptyState" class="text-center text-gray-400 py-12">
                <i class="ri-music-2-line text-5xl mb-3 block opacity-20"></i>
                <p class="text-sm">정보를 입력하고 버튼을 누르면<br>이곳에 나레이션이 나타납니다.</p>
            </div>

            <!-- 로딩 상태 -->
            <div id="loadingState" class="text-center text-indigo-400 py-12 hidden">
                <i class="ri-loader-4-line text-5xl mb-3 block animate-spin"></i>
                <p class="text-sm" id="loadingText">AI가 나레이션을 작성하고 있어요...</p>
            </div>

            <!-- 결과 -->
            <div id="resultState" class="space-y-6 hidden">
                <!-- 가사 -->
                <div class="bg-gray-50 p-6 rounded-xl border border-gray-100">
                    <p id="lyricsText" class="text-lg leading-relaxed text-gray-800 whitespace-pre-line font-medium text-center"></p>
                </div>

                <!-- 오디오 플레이어 -->
                <div id="audioSection">
                    <div class="flex flex-col items-center gap-4">
                        <audio id="audioPlayer" class="hidden"></audio>

                        <!-- 음성 로딩 중 -->
                        <div id="audioLoading" class="flex flex-col items-center gap-2">
                            <div class="w-16 h-16 bg-gray-200 rounded-full flex items-center justify-center">
                                <i class="ri-loader-4-line text-2xl text-gray-400 animate-spin"></i>
                            </div>
                            <p class="text-sm text-gray-400 font-medium">음성 생성 중...</p>
                        </div>

                        <!-- 재생 버튼 (음성 준비 완료 후) -->
                        <div id="audioReady" class="hidden" style="flex-direction: column; align-items: center; gap: 1rem;">
                            <button
                                type="button"
                                id="playBtn"
                                class="w-16 h-16 bg-indigo-600 hover:bg-indigo-700 text-white rounded-full flex items-center justify-center shadow-lg hover:shadow-xl transition hover:scale-105"
                            >
                                <i id="playIcon" class="ri-play-fill text-3xl ml-0.5"></i>
                            </button>
                            <p id="playLabel" class="text-sm text-gray-500 font-medium">들어보기</p>

                            <!-- 다운로드 버튼 -->
                            <button
                                type="button"
                                id="downloadBtn"
                                class="flex items-center gap-2 px-5 py-2.5 border-2 border-indigo-200 text-indigo-600 hover:bg-indigo-50 rounded-xl text-sm font-medium transition"
                            >
                                <i class="ri-download-line"></i>
                                음성 파일 다운로드
                            </button>
                        </div>

                        <!-- 음성 생성 실패 -->
                        <div id="audioError" class="hidden text-center">
                            <p class="text-sm text-red-400">음성 생성에 실패했습니다.</p>
                        </div>
                    </div>
                </div>

                <!-- 자동 저장 상태 / 다시 만들기 -->
                <div class="flex items-center justify-center gap-4 pt-2">
                    <span id="autoSaveStatus" class="flex items-center gap-1.5 text-sm text-gray-400 hidden">
                        <i class="ri-check-line text-green-500"></i> 자동 저장됨
                    </span>
                    <button
                        type="button"
                        id="retryBtn"
                        class="flex items-center gap-1.5 px-5 py-2 bg-white hover:bg-gray-50 text-gray-600 border rounded-lg text-sm font-medium transition"
                    >
                        <i class="ri-refresh-line"></i> 다시 만들기
                    </button>
                </div>
            </div>
        </div>
    </div>
</div>

<p class="text-center text-xs text-gray-400 mt-6">Powered by Google Gemini AI</p>
@endsection

@push('scripts')
<script>
document.addEventListener('DOMContentLoaded', function () {
    const companyInput = document.getElementById('companyName');
    const industryInput = document.getElementById('industry');
    const generateBtn = document.getElementById('generateBtn');
    const moodSelector = document.getElementById('moodSelector');
    const durationSlider = document.getElementById('durationSlider');
    const durationDisplay = document.getElementById('durationDisplay');
    const resultPanel = document.getElementById('resultPanel');
    const emptyState = document.getElementById('emptyState');
    const loadingState = document.getElementById('loadingState');
    const loadingText = document.getElementById('loadingText');
    const resultState = document.getElementById('resultState');
    const lyricsText = document.getElementById('lyricsText');
    const audioSection = document.getElementById('audioSection');
    const audioPlayer = document.getElementById('audioPlayer');
    const playBtn = document.getElementById('playBtn');
    const playIcon = document.getElementById('playIcon');
    const playLabel = document.getElementById('playLabel');
    const audioLoading = document.getElementById('audioLoading');
    const audioReady = document.getElementById('audioReady');
    const audioError = document.getElementById('audioError');
    const downloadBtn = document.getElementById('downloadBtn');
    const autoSaveStatus = document.getElementById('autoSaveStatus');
    const retryBtn = document.getElementById('retryBtn');

    let selectedMood = '신나는';
    let isPlaying = false;
    let currentAudioData = null;
    let currentAudioMimeType = null;
    let currentLyrics = null;
    let currentAudioBlob = null;

    // 슬라이더 업데이트
    durationSlider.addEventListener('input', function () {
        durationDisplay.textContent = this.value + '초';
    });

    // 분위기 선택
    moodSelector.addEventListener('click', function (e) {
        const btn = e.target.closest('.mood-btn');
        if (!btn) return;
        selectedMood = btn.dataset.mood;
        document.querySelectorAll('.mood-btn').forEach(b => {
            b.classList.remove('selected', 'border-indigo-200', 'bg-indigo-50', 'text-indigo-700');
            b.classList.add('border-gray-100', 'bg-white', 'text-gray-600');
        });
        btn.classList.add('selected', 'border-indigo-200', 'bg-indigo-50', 'text-indigo-700');
        btn.classList.remove('border-gray-100', 'bg-white', 'text-gray-600');
    });

    // PCM -> WAV 변환
    function pcmToWav(pcmData, sampleRate) {
        const numChannels = 1;
        const bitsPerSample = 16;
        const byteRate = (sampleRate * numChannels * bitsPerSample) / 8;
        const blockAlign = (numChannels * bitsPerSample) / 8;
        const dataSize = pcmData.length;
        const buffer = new ArrayBuffer(44 + dataSize);
        const view = new DataView(buffer);

        function writeString(offset, string) {
            for (let i = 0; i < string.length; i++) {
                view.setUint8(offset + i, string.charCodeAt(i));
            }
        }

        writeString(0, 'RIFF');
        view.setUint32(4, 36 + dataSize, true);
        writeString(8, 'WAVE');
        writeString(12, 'fmt ');
        view.setUint32(16, 16, true);
        view.setUint16(20, 1, true);
        view.setUint16(22, numChannels, true);
        view.setUint32(24, sampleRate, true);
        view.setUint32(28, byteRate, true);
        view.setUint16(32, blockAlign, true);
        view.setUint16(34, bitsPerSample, true);
        writeString(36, 'data');
        view.setUint32(40, dataSize, true);

        new Uint8Array(buffer, 44).set(pcmData);
        return new Blob([buffer], { type: 'audio/wav' });
    }

    function base64ToUint8Array(base64) {
        const binaryString = window.atob(base64);
        const bytes = new Uint8Array(binaryString.length);
        for (let i = 0; i < binaryString.length; i++) {
            bytes[i] = binaryString.charCodeAt(i);
        }
        return bytes;
    }

    function showState(state) {
        emptyState.classList.add('hidden');
        loadingState.classList.add('hidden');
        resultState.classList.add('hidden');
        if (state === 'empty') emptyState.classList.remove('hidden');
        if (state === 'loading') loadingState.classList.remove('hidden');
        if (state === 'result') resultState.classList.remove('hidden');
    }

    // 나레이션 생성
    async function generate() {
        const companyName = companyInput.value.trim();
        const industry = industryInput.value.trim();
        const duration = parseInt(durationSlider.value);

        if (!companyName || !industry) {
            alert('회사명과 업종을 입력해주세요.');
            return;
        }

        generateBtn.disabled = true;
        generateBtn.innerHTML = '<i class="ri-loader-4-line animate-spin"></i> 나레이션 제작 중...';
        showState('loading');
        loadingText.textContent = 'AI가 나레이션을 작성하고 있어요...';
        audioLoading.classList.remove('hidden');
        audioReady.classList.add('hidden');
        audioReady.style.display = '';
        audioError.classList.add('hidden');
        currentAudioData = null;
        currentAudioMimeType = null;
        currentAudioBlob = null;

        // 결과 패널로 스크롤
        resultPanel.scrollIntoView({ behavior: 'smooth', block: 'start' });

        try {
            // 1. 가사 생성
            const lyricsRes = await fetch('{{ route("rd.cm-song.generate-lyrics") }}', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json',
                    'X-CSRF-TOKEN': '{{ csrf_token() }}',
                },
                body: JSON.stringify({
                    company_name: companyName,
                    industry: industry,
                    mood: selectedMood,
                    duration: duration,
                }),
            });

            const lyricsData = await lyricsRes.json();
            if (!lyricsData.success) {
                throw new Error(lyricsData.error || '나레이션 생성 실패');
            }

            currentLyrics = lyricsData.lyrics;
            lyricsText.textContent = lyricsData.lyrics;
            showState('result');

            // 2. TTS 음성 생성
            try {
                const audioRes = await fetch('{{ route("rd.cm-song.generate-audio") }}', {
                    method: 'POST',
                    headers: {
                        'Content-Type': 'application/json',
                        'X-CSRF-TOKEN': '{{ csrf_token() }}',
                    },
                    body: JSON.stringify({ lyrics: lyricsData.lyrics }),
                });

                const audioData = await audioRes.json();
                if (audioData.success && audioData.audio_data) {
                    currentAudioData = audioData.audio_data;
                    currentAudioMimeType = audioData.mime_type || 'audio/L16;rate=24000';

                    const mimeType = currentAudioMimeType;
                    let audioUrl;

                    if (mimeType.includes('L16') || mimeType.includes('pcm')) {
                        const rateMatch = mimeType.match(/rate=(\d+)/);
                        const rate = rateMatch ? parseInt(rateMatch[1]) : 24000;
                        const pcmBytes = base64ToUint8Array(audioData.audio_data);
                        currentAudioBlob = pcmToWav(pcmBytes, rate);
                        audioUrl = URL.createObjectURL(currentAudioBlob);
                    } else {
                        const rawBytes = base64ToUint8Array(audioData.audio_data);
                        currentAudioBlob = new Blob([rawBytes], { type: mimeType });
                        audioUrl = URL.createObjectURL(currentAudioBlob);
                    }

                    audioPlayer.src = audioUrl;
                    audioLoading.classList.add('hidden');
                    audioReady.classList.remove('hidden');
                    audioReady.style.display = 'flex';
                } else {
                    audioLoading.classList.add('hidden');
                    audioError.classList.remove('hidden');
                }
            } catch (audioErr) {
                console.error('음성 생성 오류:', audioErr);
                audioLoading.classList.add('hidden');
                audioError.classList.remove('hidden');
            }

            // 3. 자동 저장
            await autoSave();

        } catch (error) {
            console.error('나레이션 생성 오류:', error);
            alert('생성 중 오류가 발생했습니다: ' + error.message);
            showState('empty');
        } finally {
            generateBtn.disabled = false;
            generateBtn.innerHTML = '<i class="ri-sparkling-line"></i> 나레이션 제작';
        }
    }

    // 다운로드
    downloadBtn.addEventListener('click', function () {
        if (!currentAudioBlob) return;
        const companyName = companyInput.value.trim() || '나레이션';
        const url = URL.createObjectURL(currentAudioBlob);
        const a = document.createElement('a');
        a.href = url;
        a.download = '나레이션_' + companyName + '_' + new Date().toISOString().slice(0,10) + '.wav';
        document.body.appendChild(a);
        a.click();
        document.body.removeChild(a);
        URL.revokeObjectURL(url);
    });

    // 자동 저장
    async function autoSave() {
        if (!currentLyrics) return;

        autoSaveStatus.classList.remove('hidden');
        autoSaveStatus.innerHTML = '<i class="ri-loader-4-line animate-spin text-gray-400"></i> <span class="text-gray-400">저장 중...</span>';

        try {
            const res = await fetch('{{ route("rd.cm-song.store") }}', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json',
                    'X-CSRF-TOKEN': '{{ csrf_token() }}',
                },
                body: JSON.stringify({
                    company_name: companyInput.value.trim(),
                    industry: industryInput.value.trim(),
                    mood: selectedMood,
                    duration: parseInt(durationSlider.value),
                    lyrics: currentLyrics,
                    audio_data: currentAudioData,
                    audio_mime_type: currentAudioMimeType,
                }),
            });

            const data = await res.json();
            if (data.success) {
                autoSaveStatus.innerHTML = '<i class="ri-check-line text-green-500"></i> <span class="text-green-600">자동 저장됨</span>';
            } else {
                autoSaveStatus.innerHTML = '<i class="ri-error-warning-line text-red-400"></i> <span class="text-red-400">저장 실패</span>';
            }
        } catch (error) {
            console.error('자동 저장 오류:', error);
            autoSaveStatus.innerHTML = '<i class="ri-error-warning-line text-red-400"></i> <span class="text-red-400">저장 실패</span>';
        }
    }

    // 재생/정지
    playBtn.addEventListener('click', function () {
        if (isPlaying) {
            audioPlayer.pause();
        } else {
            audioPlayer.play();
        }
    });

    audioPlayer.addEventListener('play', function () {
        isPlaying = true;
        playIcon.className = 'ri-pause-fill text-3xl';
        playIcon.classList.remove('ml-0.5');
        playLabel.textContent = '재생 중...';
    });

    audioPlayer.addEventListener('pause', function () {
        isPlaying = false;
        playIcon.className = 'ri-play-fill text-3xl ml-0.5';
        playLabel.textContent = '들어보기';
    });

    audioPlayer.addEventListener('ended', function () {
        isPlaying = false;
        playIcon.className = 'ri-play-fill text-3xl ml-0.5';
        playLabel.textContent = '들어보기';
    });

    generateBtn.addEventListener('click', generate);
    retryBtn.addEventListener('click', generate);
});
</script>
@endpush