// DOM elements
const dynamicDesc = document.getElementById("dynamicDesc");
const dynamicTitle = document.getElementById("dynamicTitle");

const singleModeBtn = document.getElementById('single-mode-btn');
const batchModeBtn = document.getElementById('batch-mode-btn');
const keywordModeBtn = document.getElementById("keyword-mode-btn");
const expModeBtn = document.getElementById("exp-mode-btn");

const singleInputField = document.querySelector('.single-input');
const batchInputField = document.querySelector('.batch-input');
const keywordInputField = document.querySelector(".keyword-input");
const expKeywordInputField = document.querySelector(".experimental-input");

const docIdInput = document.getElementById('doc-id');
const batchIdsInput = document.getElementById('batch-ids');
const keywordInput = document.getElementById("keywords");
const expKeywordInput = document.getElementById("exp-keywords")
const thresholdInput = document.getElementById("threshold");

const releaseFilter = document.querySelector("input[name=release]")
const modeFilter = document.querySelector("select[name=mode]")
const specTypeFilter = document.querySelector("select[name=spec_type]")
const workingGroupFilter = document.querySelector("select[name=working_group]")
const caseSensitiveFilter = document.querySelector("input[name=case_sensitive]")
const searchMode = document.querySelector("select[name=search_mode]")

const releaseFilter2 = document.querySelector("input[name=release2]")
const specTypeFilter2 = document.querySelector("select[name=spec_type2]")
const workingGroupFilter2 = document.querySelector("select[name=working_group2]")

const searchBtn = document.getElementById('search-btn');
const batchSearchBtn = document.getElementById('batch-search-btn');
const keywordSearchBtn = document.getElementById("keyword-search-btn");
const expKeywordSearchBtn = document.getElementById("exp-search-btn");

const loader = document.getElementById('loader');
const resultsContainer = document.getElementById('results-container');
const resultsList = document.getElementById('results-list');
const resultsStats = document.getElementById('results-stats');
const errorMessage = document.getElementById('error-message');

const sectionPopup = document.getElementById('sectionPopup');
const popupTitle = document.getElementById('popupTitle');
const popupTextareas = document.getElementById('popupTextareas');
const copyAllBtn = document.getElementById('copyAllBtn');
const closePopupBtn = document.querySelector('.close-popup');

// Search mode toggle
singleModeBtn.addEventListener('click', () => {
    dynamicTitle.textContent = "Find 3GPP Documents";
    dynamicDesc.textContent = "Enter a TSG document ID / specification ID (e.g., S1-123456, C2-987654 or 31.102) to locate the document in the 3GPP FTP server.";

    singleModeBtn.classList.add('active');
    keywordModeBtn.classList.remove("active");
    batchModeBtn.classList.remove('active');
    expModeBtn.classList.remove('active');

    singleInputField.style.display = 'block';
    batchInputField.style.display = 'none';
    keywordInputField.style.display = "none";
    expKeywordInputField.style.display = "none";
});

batchModeBtn.addEventListener('click', () => {
    dynamicTitle.textContent = "Find multiple 3GPP Documents";
    dynamicDesc.textContent = "Enter a list of TSG document ID / specification ID (e.g., S1-123456, C2-987654 or 31.102) to locate all of the specified documents in the 3GPP FTP server.";

    batchModeBtn.classList.add('active');
    keywordModeBtn.classList.remove("active");
    singleModeBtn.classList.remove('active');
    expModeBtn.classList.remove('active');

    batchInputField.style.display = 'block';
    keywordInputField.style.display = "none";
    singleInputField.style.display = 'none';
    expKeywordInputField.style.display = "none";
});

keywordModeBtn.addEventListener('click', () => {
    dynamicTitle.textContent = "Search 3GPP specifications";
    dynamicDesc.textContent = "With keywords and filters, find all of 3GPP's specifications that matches your needs (with keywords, specification number, release or even working group (C1, S5, SP, CP: always the first letter of the group followed by the workgroup number)";

    keywordModeBtn.classList.add("active");
    singleModeBtn.classList.remove('active');
    batchModeBtn.classList.remove("active");
    expModeBtn.classList.remove('active');

    singleInputField.style.display = "none";
    batchInputField.style.display = "none";
    expKeywordInputField.style.display = "none";
    keywordInputField.style.display = "block";
})

expModeBtn.addEventListener('click', () => {
    dynamicTitle.textContent = "[EXPERIMENTAL] Search 3GPP specifications";
    dynamicDesc.textContent = "With keywords and filters, find all of 3GPP's specifications that matches your needs (with keywords, specification number, release or even working group (C1, S5, SP, CP: always the first letter of the group followed by the workgroup number)";

    keywordModeBtn.classList.remove("active");
    singleModeBtn.classList.remove('active');
    batchModeBtn.classList.remove("active");
    expModeBtn.classList.add('active');

    singleInputField.style.display = "none";
    batchInputField.style.display = "none";
    expKeywordInputField.style.display = "block";
    keywordInputField.style.display = "none";
})

document.getElementById('toggleFilters').onclick = function() {
  var target = document.getElementById('filtersForm');
  target.style.display = (target.style.display === 'none' || target.style.display === '') ? 'flex' : 'none';
};

document.getElementById('toggleFilters2').onclick = function() {
  var target = document.getElementById('filtersForm2');
  target.style.display = (target.style.display === 'none' || target.style.display === '') ? 'flex' : 'none';
};

expKeywordSearchBtn.addEventListener("click", async ()=>{
    let keywords = expKeywordInput.value.trim();
    let release = releaseFilter2.value.trim();
    let wg = workingGroupFilter2.value.trim();
    let specType = specTypeFilter2.value.trim();
    let threshold = thresholdInput.value.trim();

    if (!keywords){
        showError("Please enter at least one keyword");
        return;
    }

    showLoader();
    hideError();

    try{
        let body = {
            keywords,
            threshold
        };
        if (release != ""){body["release"] = release}
        if (wg != ""){body["working_group"] = wg}
        if (specType != ""){body["spec_type"] = specType}
        const response = await fetch("/search-spec/experimental", {
            method: "POST",
            headers: {
                "Content-Type": "application/json"
            },
            body: JSON.stringify(body)
        });

        const data = await response.json();
        if (response.ok){
            displayKeywordResults(data, "");
        } else if (response.status == 404) {
            showError('No specification has been found');
        } else {
            showError(`Error processing keyword request: ${data.detail}`)
        }
    } catch (error) {
        showError('Error connecting to the server. Please check if the API is running.');
        console.error('Error:', error);
    } finally {
        hideLoader();
    }
})

keywordSearchBtn.addEventListener("click", async ()=>{
    let keywords = keywordInput.value.trim();
    let release = releaseFilter.value;
    let wg = workingGroupFilter.value;
    let specType = specTypeFilter.value;
    let search = searchMode.value;
    let checked = caseSensitiveFilter.checked;
    let mode = modeFilter.value;

    if (!keywords && searchMode == "deep") {
        showError("Please enter at least one keyword in deep search mode");
        return;
    }

    showLoader();
    hideError();

    try{
        let body = {
            keywords,
            "search_mode": search,
            "case_sensitive": checked,
            "mode": mode
        };
        if (release != ""){body.release = release}
        if (wg != ""){body["working_group"] = wg}
        if (specType != ""){body["spec_type"] = specType}
        const response = await fetch("/search-spec", {
            method: "POST",
            headers: {
                "Content-Type": "application/json"
            },
            body: JSON.stringify(body)
        });

        const data = await response.json();
        if (response.ok){
            displayKeywordResults(data, search);
        } else if (response.status == 404) {
            showError('No specification has been found');
        } else {
            showError(`Error processing keyword request: ${data.detail}`)
        }
    } catch (error) {
        showError('Error connecting to the server. Please check if the API is running.');
        console.error('Error:', error);
    } finally {
        hideLoader();
    }
})


// Single document search
searchBtn.addEventListener('click', async () => {
    const docId = docIdInput.value.trim();
    if (!docId) {
        showError('Please enter a document ID');
        return;
    }

    showLoader();
    hideError();
    
    try {
        const response = await fetch(`/find`, {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({ doc_id: docId, release: null })
        });

        const data = await response.json();
        
        if (response.ok) {
            displaySingleResult(data);
        } else {
            displaySingleNotFound(docId, data.detail);
        }
    } catch (error) {
        showError('Error connecting to the server. Please check if the API is running.');
        console.error('Error:', error);
    } finally {
        hideLoader();
    }
});

// Batch document search
batchSearchBtn.addEventListener('click', async () => {
    const batchText = batchIdsInput.value.trim();
    if (!batchText) {
        showError('Please enter at least one document ID');
        return;
    }

    const docIds = batchText.split('\n')
        .map(id => id.trim())
        .filter(id => id !== '');

    if (docIds.length === 0) {
        showError('Please enter at least one valid document ID');
        return;
    }

    showLoader();
    hideError();
    
    try {
        const response = await fetch(`/batch`, {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({ doc_ids: docIds })
        });

        const data = await response.json();
        
        if (response.ok) {
            displayBatchResults(data);
        } else if (response.status == 404) {
            showError('No document has been found');
        } else {
            showError('Error processing batch request')
        }
    } catch (error) {
        showError('Error connecting to the server. Please check if the API is running.');
        console.error('Error:', error);
    } finally {
        hideLoader();
    }
});

// Display single result
function displaySingleResult(data) {
    resultsList.innerHTML = '';
    
    const resultItem = document.createElement('div');
    resultItem.className = 'result-item';
    let scopeItem = data.scope ? `<p>Scope : ${data.scope}</p>` : ""
    resultItem.innerHTML = `
        <div class="result-header">
            <div class="result-id">${data.doc_id}</div>
            <div class="result-status status-found">Found</div>
        </div>
        <div class="result-url">
            <a href="${data.url}" target="_blank">${data.url}</a>
            ${scopeItem}
        </div>
    `;
    
    resultsList.appendChild(resultItem);
    resultsStats.textContent = `Found in ${data.search_time.toFixed(2)} seconds`;
    resultsContainer.style.display = 'block';
}

// Display single not found result
function displaySingleNotFound(docId, message) {
    resultsList.innerHTML = '';
    
    const resultItem = document.createElement('div');
    resultItem.className = 'result-item';
    resultItem.innerHTML = `
        <div class="result-header">
            <div class="result-id">${docId}</div>
            <div class="result-status status-not-found">Not Found</div>
        </div>
        <div>${message}</div>
    `;
    
    resultsList.appendChild(resultItem);
    resultsStats.textContent = 'Document not found';
    resultsContainer.style.display = 'block';
}

function displayKeywordResults(data, mode) {
    resultsList.innerHTML = '';
    
    data.results.forEach(spec => {
        const resultItem = document.createElement("div");
        resultItem.className = "result-item";
        
        resultItem.innerHTML = `
            <div class="result-header">
                <div class="result-id">${spec.id}</div>
                <div class="result-status status-found">Found</div>
            </div>
            <div class="result-url">
                <p>Title: ${spec.title}</p>
                <p>Type: ${spec.type}</p>
                <p>Release: ${spec.release}</p>
                <p>Version: ${spec.version}</p>
                <p>WG: ${spec.working_group}</p>
                <p>URL: <a target="_blank" href="${spec.url}">${spec.url}</a></p>
                <p>Scope: ${spec.scope}</p>
            </div>
        `;

        if(mode == "deep"){
            resultItem.innerHTML += `
                <div class="result-actions">
                    <button class="get-section-btn btn" data-spec-id="${spec.id}">Get section</button>
                </div>
            `
        }
        
        // Ajouter le bouton au DOM
        resultsList.appendChild(resultItem);
        
        // Récupérer le bouton nouvellement créé
        if(mode == "deep"){
            const button1 = resultItem.querySelector('.get-section-btn');
            button1._sections = spec.contains;
        }
    });

    document.querySelectorAll('.get-section-btn').forEach(button => {
      button.addEventListener('click', function() {
        let specId = this.getAttribute("data-spec-id");
        let sections = this._sections;
        openSectionPopup(specId, sections);
      });
    });

    resultsStats.textContent = `Found ${data.results.length} in ${data.search_time.toFixed(2)} seconds`
    resultsContainer.style.display = 'block';
}

function openSectionPopup(specId, sections) {
    const newTab = window.open('', '_blank');
    let htmlContent = 
    `
        <!DOCTYPE html>
        <html lang="fr">
        <head>
          <meta charset="UTF-8">
          <title>Sections of specification number ${specId}</title>
          <link rel="stylesheet" href="/static/style.css">
          <link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap">
        </head>
        <body>
            <div class="popup-header">
                <h2 id="popupTitle">Sections of specification number ${specId}</h2>
            </div>
            <div id="popupTextareas" class="popup-textareas">
    `;

    Object.entries(sections).forEach(([sectionTitle, content], index) => {
        htmlContent += 
        `
            <div class="textarea-container">
                <h2>${sectionTitle}</h2>
                <p>${content.replace(/\n/g, '<br>')}</p>
            </div>
        `;
    });

    htmlContent += `
        </div>
        </body>
        </html>
      `;

    newTab.document.open();
    newTab.document.write(htmlContent);
    newTab.document.close()
//   popupTitle.textContent = `Sections of specification ${specId}`;
  
//   popupTextareas.innerHTML = '';
//   Object.entries(sections).forEach(([section, content], index) => {
//     const container = document.createElement("div");
//     container.className = "textarea-container";

//     const textarea = document.createElement("textarea");
//     textarea.id = `section-${index}`;
//     textarea.value = `${section}\n\n${content}`
//     textarea.readOnly = true;

//     const copyBtn = document.createElement('button');
//     copyBtn.className = 'copy-btn';
//     copyBtn.textContent = 'Copy';
//     copyBtn.onclick = () => copyTextarea(`section-${index}`);

//     container.appendChild(textarea);
//     container.appendChild(copyBtn);
//     popupTextareas.appendChild(container);
//   });
  
//   sectionPopup.style.display = 'block';
//   document.body.style.overflow = 'hidden';
}

// Display batch results
function displayBatchResults(data) {
    resultsList.innerHTML = '';
    
    // Found documents
    Object.entries(data.results).forEach(([docId, url]) => {
        const resultItem = document.createElement('div');
        resultItem.className = 'result-item';
        resultItem.innerHTML = `
            <div class="result-header">
                <div class="result-id">${docId}</div>
                <div class="result-status status-found">Found</div>
            </div>
            <div class="result-url">
                <a href="${url}" target="_blank">${url}</a>
            </div>
        `;
        resultsList.appendChild(resultItem);
    });
    
    // Not found documents
    data.missing.forEach(docId => {
        const resultItem = document.createElement('div');
        resultItem.className = 'result-item';
        resultItem.innerHTML = `
            <div class="result-header">
                <div class="result-id">${docId}</div>
                <div class="result-status status-not-found">Not Found</div>
            </div>
        `;
        resultsList.appendChild(resultItem);
    });
    
    const foundCount = Object.keys(data.results).length;
    const totalCount = foundCount + data.missing.length;
    
    resultsStats.textContent = `Found ${foundCount} of ${totalCount} documents in ${data.search_time.toFixed(2)} seconds`;
    resultsContainer.style.display = 'block';
}

// Show loader
function showLoader() {
    loader.style.display = 'block';
}

// Hide loader
function hideLoader() {
    loader.style.display = 'none';
}

// Show error message
function showError(message) {
    resultsList.innerHTML = "";
    resultsStats.textContent = `Found 0 documents`;
    errorMessage.textContent = message;
    errorMessage.style.display = 'block';
}

// Hide error message
function hideError() {
    errorMessage.style.display = 'none';
}

// Enter key event for single search
docIdInput.addEventListener('keypress', (e) => {
    if (e.key === 'Enter') {
        searchBtn.click();
    }
});

keywordInput.addEventListener('keypress', (event)=>{
    if (event.key === "Enter"){
        keywordSearchBtn.click();
    }
})

expKeywordInput.addEventListener('keypress', (event)=>{
    if (event.key === "Enter"){
        keywordSearchBtn.click();
    }
})