let lastSaveTimestamp = 0;
let controller;

function formatText() {
    const textOrg = document.getElementById('novelContent1').value;
    let text = textOrg.replace(/[」。）]/g, '$&\n');
    while (text.includes('\n\n')) {
        text = text.replace(/\n\n/g, '\n');
    }
    text = text.replace(/「([^」\n]*)\n([^」\n]*)」/g, '「$1$2」');
    text = text.replace(/（([^）\n]*)\n([^）\n]*)）/g, '（$1$2）');

    while (text.search(/「[^「\n]*。\n/) >= 0) {
        text = text.replace(/「([^「\n]*。)\n/, '「$1');
    }

    text = text.replace(/\n/g, "\n\n");
    text = text.replace(/\n#/g, "\n\n#");

    document.getElementById('novelContent1').value = text;
}

function unmalform(text) {
    let result = null;
    while (!result && text) {
        try {
            result = decodeURI(text);
        } catch (error) {
            text = text.slice(0, -1);
        }
    }
    return result || '';
}

function partialEncodeURI(text) {
    console.log('partialEncodeURI called');
    console.log('partialEncodeToggle checked:', document.getElementById("partialEncodeToggle").checked);

    if (!document.getElementById("partialEncodeToggle").checked) {
        console.log('Partial encode is disabled, returning original text');
        return text;
    }

    let length = parseInt(document.getElementById("encodeLength").value);
    console.log('Encode length:', length);

    const chunks = [];
    for (let i = 0; i < text.length; i += 1) {
        chunks.push(text.slice(i, i + 1));
    }

    console.log('Original text:', text);

    const encodedChunks = chunks.map((chunk, index) => {
        if (index % length === 0) {
            console.log('Encoding chunk at index', index, ':', chunk);
            return encodeURI(chunk);
        }
        return chunk;
    });

    const result = encodedChunks.join('');
    console.log('Encoded text:', result);

    return result;
}

function saveToJson() {
    const novelContent1 = document.getElementById('novelContent1').value;
    const novelContent2 = document.getElementById('novelContent2').value;
    const generatePrompt = document.getElementById('generatePrompt').value;
    const nextPrompt = document.getElementById('nextPrompt').value;
    const savedTitle = document.getElementById('savedTitle').value;
    const jsonData = JSON.stringify({
        novelContent1: novelContent1,
        novelContent2: novelContent2,
        generatePrompt: generatePrompt,
        nextPrompt: nextPrompt,
        savedTitle: savedTitle
    });
    const blob = new Blob([jsonData], { type: 'application/json' });
    const url = URL.createObjectURL(blob);
    const a = document.createElement('a');
    a.href = url;
    a.download = 'novel_data.json';
    if (savedTitle) {
        a.download = savedTitle + '.json';
    }
    document.body.appendChild(a);
    a.click();
    document.body.removeChild(a);
    URL.revokeObjectURL(url);
}

function loadFromJson() {
    const fileInput = document.createElement('input');
    fileInput.type = 'file';
    fileInput.accept = '.json';
    fileInput.style.display = 'none';
    document.body.appendChild(fileInput);
    fileInput.addEventListener('change', function (event) {
        const file = event.target.files[0];
        if (file) {
            const reader = new FileReader();
            reader.onload = function (e) {
                try {
                    const jsonData = JSON.parse(e.target.result);
                    if (jsonData.novelContent1) {
                        document.getElementById('novelContent1').value = jsonData.novelContent1;
                    }
                    if (jsonData.novelContent2) {
                        document.getElementById('novelContent2').value = jsonData.novelContent2;
                    }
                    if (jsonData.generatePrompt) {
                        document.getElementById('generatePrompt').value = jsonData.generatePrompt;
                    }
                    if (jsonData.nextPrompt) {
                        document.getElementById('nextPrompt').value = jsonData.nextPrompt;
                    }
                    if (jsonData.savedTitle) {
                        document.getElementById('savedTitle').value = jsonData.savedTitle;
                    }
                    alert('JSONファイルを正常に読み込みました。');
                } catch (error) {
                    alert('無効なJSONファイルです。');
                }
            };
            reader.readAsText(file);
        }
    });
    fileInput.click();
}

function saveToUserStorage(force = false) {
    const currentTime = Date.now();
    if (!force && currentTime - lastSaveTimestamp < 5000) {
        return;
    }

    const geminiClientData = {
        novelContent: document.getElementById('novelContent1').value,
        novelContent2: document.getElementById('novelContent2').value,
        generatePrompt: document.getElementById('generatePrompt').value,
        nextPrompt: document.getElementById('nextPrompt').value,
        savedTitle: document.getElementById('savedTitle').value,
        memo: document.getElementById('memo').value,
        geminiApiKey: document.getElementById('geminiApiKey').value,
        selectedEndpoint: document.getElementById('endpointSelect').value
    };

    localStorage.setItem('geminiClient', JSON.stringify(geminiClientData));
    lastSaveTimestamp = currentTime;
}

function loadFromUserStorage() {
    const savedData = localStorage.getItem('geminiClient');
    if (savedData) {
        const geminiClientData = JSON.parse(savedData);
        document.getElementById('novelContent1').value = geminiClientData.novelContent || '';
        document.getElementById('novelContent2').value = geminiClientData.novelContent2 || '';
        document.getElementById('generatePrompt').value = geminiClientData.generatePrompt || '';
        document.getElementById('nextPrompt').value = geminiClientData.nextPrompt || '';
        document.getElementById('savedTitle').value = geminiClientData.savedTitle || '';
        document.getElementById('memo').value = geminiClientData.memo || '';
        document.getElementById('geminiApiKey').value = geminiClientData.geminiApiKey || '';
        document.getElementById('endpointSelect').value = geminiClientData.selectedEndpoint || 'models/gemini-1.5-pro-002';
    }
}

function createPayload() {
    const novelContent1 = document.getElementById('novelContent1');
    const text = novelContent1.value;
    const lines = text.split('\n').filter(x => x);
    let lastPart = lines.pop() || '';


    let systemPrompt = `${partialEncodeURI(document.getElementById('generatePrompt').value)}`;
    let messages = [
        {
            "role": "user",
            "parts": [{ "text": systemPrompt || "." }]
        }
    ];

    if (lines.length > 0) {
        messages.push(
            {
                "role": "model",
                "parts": [{ "text": partialEncodeURI(lines.join("\n")) }]
            },
            {
                "role": "user",
                "parts": [{ "text": "続きを書いて。" }]
            }
        );
    }

    messages.push(
        {
            "role": "model",
            "parts": [{ "text": lastPart }]
        },
        {
            "role": "user",
            "parts": [{ "text": `続きを書いて。${partialEncodeURI(document.getElementById('nextPrompt').value)} ${document.getElementById('characterCountInput').value}文字程度。` }]
        }
    );

    return {
        method: 'POST',
        headers: {},
        body: JSON.stringify({
            contents: messages,
            "generationConfig": {
                "temperature": 1.0,
                "max_output_tokens": 4096
            },
            safetySettings: [
                {
                    "category": "HARM_CATEGORY_HATE_SPEECH",
                    "threshold": "BLOCK_NONE"
                },
                {
                    "category": "HARM_CATEGORY_DANGEROUS_CONTENT",
                    "threshold": "BLOCK_NONE"
                },
                {
                    "category": "HARM_CATEGORY_HARASSMENT",
                    "threshold": "BLOCK_NONE"
                },
                {
                    "category": "HARM_CATEGORY_SEXUALLY_EXPLICIT",
                    "threshold": "BLOCK_NONE"
                }
            ]
        }),
        mode: 'cors'
    };
}

function fetchStream(ENDPOINT, payload) {
    const novelContent2 = document.getElementById('novelContent2');
    const requestButton = document.getElementById('requestButton');
    controller = new AbortController();
    const signal = controller.signal;

    fetch(ENDPOINT, { ...payload, signal })
        .then(response => {
            if (!response.ok) {
                throw new Error('ネットワークの応答が正常ではありません');
            }
            const reader = response.body.getReader();
            const decoder = new TextDecoder();
            let buffer = '';

            function readStream() {
                reader.read().then(({ done, value }) => {
                    if (done) {
                        console.debug('ストリームが完了しました');
                        document.getElementById('stopButton').classList.add('d-none');
                        requestButton.disabled = false;
                        return;
                    }

                    const chunk = decoder.decode(value, { stream: true });
                    buffer += chunk;
                    console.debug('チャンクを受信しました:', chunk);

                    // バッファから完全なJSONオブジェクトを抽出して処理
                    let startIndex = 0;
                    while (true) {
                        const endIndex = buffer.indexOf('\n', startIndex);
                        if (endIndex === -1) break;

                        const line = buffer.slice(startIndex, endIndex).trim();
                        startIndex = endIndex + 1;

                        if (line.startsWith('data: ')) {
                            const jsonString = line.slice(5);
                            if (jsonString === '[DONE]') {
                                console.debug('Received [DONE] signal');
                                break;
                            }
                            try {
                                const data = JSON.parse(jsonString);
                                console.debug('Parsed JSON:', data);
                                if (data.candidates && data.candidates[0].content && data.candidates[0].content.parts) {
                                    data.candidates[0].content.parts.forEach(part => {
                                        if (part.text) {
                                            console.debug('Adding text to output:', part.text);
                                            novelContent2.value += part.text;
                                            novelContent2.scrollTop = novelContent2.scrollHeight;
                                        }
                                    });
                                }
                                // finishReasonをチェック
                                if (data.candidates && data.candidates[0].finishReason) {
                                    if (data.candidates[0].finishReason === 'STOP') {
                                        requestButton.classList.add('green-flash-bg');
                                        setTimeout(() => {
                                            requestButton.classList.remove('green-flash-bg');
                                        }, 2000);
                                    } else {
                                        requestButton.classList.add('red-flash-bg');
                                        setTimeout(() => {
                                            requestButton.classList.remove('red-flash-bg');
                                        }, 2000);
                                    }
                                }
                            } catch (error) {
                                console.error('JSONパースエラー:', error);
                            }
                        }
                    }

                    // 処理済みの部分をバッファから削除
                    buffer = buffer.slice(startIndex);

                    readStream();
                }).catch(error => {
                    if (error.name === 'AbortError') {
                        console.log('フェッチがユーザーによって中止されました');
                    } else {
                        console.error('ストリーム読み取りエラー:', error);
                    }
                    document.getElementById('stopButton').classList.add('d-none');
                    requestButton.disabled = false;
                });
            }

            readStream();
        })
        .catch(error => {
            if (error.name === 'AbortError') {
                console.log('フェッチがユーザーよって中止されました');
            } else {
                console.error('フェッチエラー:', error);
            }
            requestButton.disabled = false;
        });
}

function fetchNonStream(ENDPOINT, payload) {
    const novelContent2 = document.getElementById('novelContent2');
    fetch(ENDPOINT, payload)
        .then(response => response.json())
        .then(data => {
            if (data && data.candidates && data.candidates[0].content && data.candidates[0].content.parts && data.candidates[0].content.parts[0].text) {
                novelContent2.value += data.candidates[0].content.parts[0].text;
                novelContent2.scrollTop = novelContent2.scrollHeight;
            }
        })
        .catch(error => {
            console.error('エラー:', error);
        })
        .finally(() => {
            document.getElementById('requestButton').disabled = false;
        });
}

function Request() {
    const selectedEndpoint = document.getElementById('endpointSelect').value;
    let ENDPOINT = `https://generativelanguage.googleapis.com/v1beta/${selectedEndpoint}:generateContent?key=` + document.getElementById('geminiApiKey').value;
    try {
        if (!document.getElementById('geminiApiKey').value) {
            throw new Error("Gemini APIキーが設定されていません。");
        }
    } catch (e) {
        console.error(e);
        document.getElementById("geminiApiKey").classList.add("bg-danger");
        document.querySelector('[data-bs-toggle="offcanvas"]').click();
        return;
    }
    document.getElementById("geminiApiKey").classList.remove("bg-danger");

    document.getElementById('requestButton').disabled = true;
    let stream = document.getElementById('streamToggle').checked;
    document.getElementById('novelContent2').value = ''; // 新しい生成を開始する前に内容をクリア

    const payload = createPayload();

    if (stream) {
        // ここでエンドポイントを正しく変更
        ENDPOINT = ENDPOINT.replace(':generateContent', ':streamGenerateContent') + '&alt=sse';
        console.debug('Stream ENDPOINT:', ENDPOINT); // デバッグ用出力を追加
        fetchStream(ENDPOINT, payload);
        document.getElementById('stopButton').classList.remove('d-none');
    } else {
        fetchNonStream(ENDPOINT, payload);
    }

    // 出力のアコーディオンを開く
    const outputAccordion = document.querySelector('#content2Collapse');
    if (outputAccordion) {
        const bsCollapse = new bootstrap.Collapse(outputAccordion, { toggle: false });
        bsCollapse.show();
    }
}

function stopGeneration() {
    if (controller) {
        controller.abort();
        controller = null;
    }
    document.getElementById('stopButton').classList.add('d-none');
    document.getElementById('requestButton').disabled = false;
}

// 新しい関数を追加
function handleKeyPress(event) {
    if (event.ctrlKey && event.key === 'Enter') {
        Request();
    }
}

function syncInputs() {
    const inputs = document.querySelectorAll('input[type="range"], input[type="number"]');
    inputs.forEach(input => {
        const baseId = input.id.replace('Input', '');
        const pairedInput = document.getElementById(baseId + (input.type === 'range' ? 'Input' : ''));

        if (pairedInput) {
            input.addEventListener('input', function () {
                pairedInput.value = this.value;
            });
        }
    });
}

function openNextAccordion() {
    const accordions = document.querySelectorAll('#mainAccordion .accordion-item');
    let currentIndex = -1;
    
    // 現在開いているアコーディオンのインデックスを見つける
    for (let i = 0; i < accordions.length; i++) {
        if (!accordions[i].querySelector('.accordion-button').classList.contains('collapsed')) {
            currentIndex = i;
            break;
        }
    }
    
    // 次のアコーディオンを開く
    if (currentIndex < accordions.length - 1) {
        new bootstrap.Collapse(accordions[currentIndex].querySelector('.accordion-collapse')).hide();
        new bootstrap.Collapse(accordions[currentIndex + 1].querySelector('.accordion-collapse')).show();
    } else {
        // もう次がない場合、ボタンを赤く点滅させる
        const nextButton = document.getElementById('nextAccordion');
        nextButton.classList.add('red-flash-bg');
        setTimeout(() => {
            nextButton.classList.remove('red-flash-bg');
        }, 2000);
    }
}

function openPreviousAccordion() {
    const accordions = document.querySelectorAll('#mainAccordion .accordion-item');
    let currentIndex = -1;
    
    // 現在開いているアコーディオンのインデックスを見つける
    for (let i = 0; i < accordions.length; i++) {
        if (!accordions[i].querySelector('.accordion-button').classList.contains('collapsed')) {
            currentIndex = i;
            break;
        }
    }
    
    // 前のアコーディオンを開く
    if (currentIndex > 0) {
        new bootstrap.Collapse(accordions[currentIndex].querySelector('.accordion-collapse')).hide();
        new bootstrap.Collapse(accordions[currentIndex - 1].querySelector('.accordion-collapse')).show();
    } else {
        // もう前がない場合、ボタンを赤く点滅させる
        const prevButton = document.getElementById('prevAccordion');
        prevButton.classList.add('red-flash-bg');
        setTimeout(() => {
            prevButton.classList.remove('red-flash-bg');
        }, 2000);
    }
}

function moveToInput() {
    const content1 = document.getElementById('novelContent1');
    const content2 = document.getElementById('novelContent2');

    let content1Lines = content1.value.trim().split('\n');
    let content2Lines = content2.value.trim().split('\n');

    // content1の最後の行とcontent2の先頭行が完全に一致する場合、content2から削除
    if (content1Lines[content1Lines.length - 1] === content2Lines[0]) {
        content2Lines.shift();
    } else {
        // 部分的な重複を検出して削除
        const lastLine = content1Lines[content1Lines.length - 1];
        const firstLine = content2Lines[0];
        const overlapIndex = firstLine.indexOf(lastLine);
        if (overlapIndex !== -1) {
            content2Lines[0] = firstLine.slice(overlapIndex + lastLine.length).trim();
            if (content2Lines[0] === '') {
                content2Lines.shift();
            }
        }
    }

    // content2の内容をcontent1の末尾に追加
    content1.value = content1Lines.join('\n') + '\n' + content2Lines.join('\n');

    // content2を空にする
    content2.value = '';

    // content1Collapseを開く
    const content1Collapse = new bootstrap.Collapse(document.getElementById('content1Collapse'), {
        show: true
    });
}

document.addEventListener('DOMContentLoaded', function () {
    // ページ読み込み時にデータを復元
    loadFromUserStorage();

    // イベントリスナーの設定
    ['novelContent1', 'novelContent2', 'generatePrompt', 'nextPrompt', 'memo', 'geminiApiKey', 'endpointSelect'].forEach(id => {
        document.getElementById(id).addEventListener('input', () => {
            saveToUserStorage(true);
        });
    });
    document.getElementById('novelContent1').addEventListener('keydown', handleKeyPress);

    document.querySelectorAll('[data-modal-text]').forEach(element => {
        element.addEventListener('click', function () {
            document.querySelectorAll(".modal-text").forEach(el => {
                el.classList.add("d-none");
                if (el.classList.contains(this.getAttribute('data-modal-text'))) {
                    el.classList.remove("d-none");
                }
            });
        });
    });

    syncInputs();

    // 60秒ごとに自動保存実行
    setInterval(() => {
        saveToUserStorage();
    }, 60000);

    // 基本設定のアコーディオンを開く
    const basicSettingsAccordion = document.querySelector('#promptsCollapse');
    if (basicSettingsAccordion) {
        new bootstrap.Collapse(basicSettingsAccordion).show();
    }

    // ナビゲーションボタンのイベントリスナーを設定
    document.getElementById('prevAccordion').addEventListener('click', openPreviousAccordion);
    document.getElementById('nextAccordion').addEventListener('click', openNextAccordion);
});