// ============================================================
// Scripts: CRUD, quick access, execution dialog
// ============================================================

let scriptFormDirty = false;

async function loadScripts() {
    const token = localStorage.getItem('media_server_token');

    try {
        const response = await fetch('/api/scripts/list', {
            headers: {
                'Authorization': `Bearer ${token}`
            }
        });

        if (response.ok) {
            scripts = await response.json();
            displayQuickAccess();
        }
    } catch (error) {
        console.error('Error loading scripts:', error);
    }
}

let _quickAccessGen = 0;
async function displayQuickAccess() {
    const gen = ++_quickAccessGen;
    const grid = document.getElementById('scripts-grid');

    const fragment = document.createDocumentFragment();
    const hasScripts = scripts.length > 0;
    let hasLinks = false;

    scripts.forEach(script => {
        const button = document.createElement('button');
        button.className = 'script-btn';
        button.onclick = () => executeScript(script.name, button);

        if (script.icon) {
            const iconEl = document.createElement('div');
            iconEl.className = 'script-icon';
            iconEl.setAttribute('data-mdi-icon', script.icon);
            button.appendChild(iconEl);
        }

        const label = document.createElement('div');
        label.className = 'script-label';
        label.textContent = script.label || script.name;
        button.appendChild(label);

        if (script.description) {
            const description = document.createElement('div');
            description.className = 'script-description';
            description.textContent = script.description;
            button.appendChild(description);
        }

        fragment.appendChild(button);
    });

    try {
        const token = localStorage.getItem('media_server_token');
        if (token) {
            const response = await fetch('/api/links/list', {
                headers: { 'Authorization': `Bearer ${token}` }
            });
            if (gen !== _quickAccessGen) return;
            if (response.ok) {
                const links = await response.json();
                hasLinks = links.length > 0;
                links.forEach(link => {
                    const card = document.createElement('a');
                    card.className = 'script-btn link-card';
                    card.href = link.url;
                    card.target = '_blank';
                    card.rel = 'noopener noreferrer';

                    if (link.icon) {
                        const iconEl = document.createElement('div');
                        iconEl.className = 'script-icon';
                        iconEl.setAttribute('data-mdi-icon', link.icon);
                        card.appendChild(iconEl);
                    }

                    const label = document.createElement('div');
                    label.className = 'script-label';
                    label.textContent = link.label || link.name;
                    card.appendChild(label);

                    if (link.description) {
                        const desc = document.createElement('div');
                        desc.className = 'script-description';
                        desc.textContent = link.description;
                        card.appendChild(desc);
                    }

                    fragment.appendChild(card);
                });
            }
        }
    } catch (e) {
        if (gen !== _quickAccessGen) return;
        console.warn('Failed to load links for quick access:', e);
    }

    if (!hasScripts && !hasLinks) {
        const empty = document.createElement('div');
        empty.className = 'scripts-empty empty-state-illustration';
        empty.innerHTML = `<svg viewBox="0 0 64 64"><path d="M20 8l-8 48"/><path d="M44 8l8 48"/><path d="M10 24h44"/><path d="M8 40h44"/></svg><p>${t('quick_access.no_items')}</p>`;
        fragment.prepend(empty);
    }

    grid.innerHTML = '';
    grid.appendChild(fragment);
    resolveMdiIcons(grid);
}

async function executeScript(scriptName, buttonElement) {
    const token = localStorage.getItem('media_server_token');
    buttonElement.classList.add('executing');

    try {
        const response = await fetch(`/api/scripts/execute/${scriptName}`, {
            method: 'POST',
            headers: {
                'Authorization': `Bearer ${token}`,
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({ args: [] })
        });

        const result = await response.json();

        if (response.ok && result.success) {
            showToast(`${scriptName} executed successfully`, 'success');
        } else {
            showToast(`Failed to execute ${scriptName}`, 'error');
        }
    } catch (error) {
        console.error(`Error executing script ${scriptName}:`, error);
        showToast(`Error executing ${scriptName}`, 'error');
    } finally {
        buttonElement.classList.remove('executing');
    }
}

// ============================================================
// Script Management CRUD
// ============================================================

let _loadScriptsPromise = null;
async function loadScriptsTable() {
    if (_loadScriptsPromise) return _loadScriptsPromise;
    _loadScriptsPromise = _loadScriptsTableImpl();
    _loadScriptsPromise.finally(() => { _loadScriptsPromise = null; });
    return _loadScriptsPromise;
}

async function _loadScriptsTableImpl() {
    const token = localStorage.getItem('media_server_token');
    const tbody = document.getElementById('scriptsTableBody');

    try {
        const response = await fetch('/api/scripts/list', {
            headers: { 'Authorization': `Bearer ${token}` }
        });

        if (!response.ok) {
            throw new Error('Failed to fetch scripts');
        }

        const scriptsList = await response.json();

        if (scriptsList.length === 0) {
            tbody.innerHTML = '<tr><td colspan="5" class="empty-state"><div class="empty-state-illustration"><svg viewBox="0 0 64 64"><rect x="8" y="4" width="48" height="56" rx="4"/><path d="M20 20h24M20 32h16M20 44h20"/></svg><p>' + t('scripts.empty') + '</p></div></td></tr>';
            return;
        }

        tbody.innerHTML = scriptsList.map(script => `
            <tr>
                <td><span class="name-with-icon">${script.icon ? `<span class="table-icon" data-mdi-icon="${escapeHtml(script.icon)}"></span>` : ''}<code>${escapeHtml(script.name)}</code></span></td>
                <td>${escapeHtml(script.label || script.name)}</td>
                <td style="max-width: 200px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;"
                    title="${escapeHtml(script.command || 'N/A')}">${escapeHtml(script.command || 'N/A')}</td>
                <td>${script.timeout}s</td>
                <td>
                    <div class="action-buttons">
                        <button class="action-btn execute" data-action="execute" data-script-name="${escapeHtml(script.name)}" title="Execute script">
                            <svg viewBox="0 0 24 24"><path d="M8 5v14l11-7z"/></svg>
                        </button>
                        <button class="action-btn" data-action="edit" data-script-name="${escapeHtml(script.name)}" title="Edit script">
                            <svg viewBox="0 0 24 24"><path d="M3 17.25V21h3.75L17.81 9.94l-3.75-3.75L3 17.25zM20.71 7.04c.39-.39.39-1.02 0-1.41l-2.34-2.34c-.39-.39-1.02-.39-1.41 0l-1.83 1.83 3.75 3.75 1.83-1.83z"/></svg>
                        </button>
                        <button class="action-btn delete" data-action="delete" data-script-name="${escapeHtml(script.name)}" title="Delete script">
                            <svg viewBox="0 0 24 24"><path d="M6 19c0 1.1.9 2 2 2h8c1.1 0 2-.9 2-2V7H6v12zM19 4h-3.5l-1-1h-5l-1 1H5v2h14V4z"/></svg>
                        </button>
                    </div>
                </td>
            </tr>
        `).join('');
        resolveMdiIcons(tbody);
    } catch (error) {
        console.error('Error loading scripts:', error);
        tbody.innerHTML = '<tr><td colspan="5" class="empty-state" style="color: var(--error);">Failed to load scripts</td></tr>';
    }
}

function showAddScriptDialog() {
    const dialog = document.getElementById('scriptDialog');
    const form = document.getElementById('scriptForm');
    const title = document.getElementById('dialogTitle');

    form.reset();
    document.getElementById('scriptOriginalName').value = '';
    document.getElementById('scriptIsEdit').value = 'false';
    document.getElementById('scriptName').disabled = false;
    document.getElementById('scriptIconPreview').innerHTML = '';
    title.textContent = t('scripts.dialog.add');

    scriptFormDirty = false;

    document.body.classList.add('dialog-open');
    dialog.showModal();
}

async function showEditScriptDialog(scriptName) {
    const token = localStorage.getItem('media_server_token');
    const dialog = document.getElementById('scriptDialog');
    const title = document.getElementById('dialogTitle');

    try {
        const response = await fetch('/api/scripts/list', {
            headers: { 'Authorization': `Bearer ${token}` }
        });

        if (!response.ok) {
            throw new Error('Failed to fetch script details');
        }

        const scriptsList = await response.json();
        const script = scriptsList.find(s => s.name === scriptName);

        if (!script) {
            showToast('Script not found', 'error');
            return;
        }

        document.getElementById('scriptOriginalName').value = scriptName;
        document.getElementById('scriptIsEdit').value = 'true';
        document.getElementById('scriptName').value = scriptName;
        document.getElementById('scriptName').disabled = true;
        document.getElementById('scriptLabel').value = script.label || '';
        document.getElementById('scriptCommand').value = script.command || '';
        document.getElementById('scriptDescription').value = script.description || '';
        document.getElementById('scriptIcon').value = script.icon || '';
        document.getElementById('scriptTimeout').value = script.timeout || 30;

        const preview = document.getElementById('scriptIconPreview');
        if (script.icon) {
            fetchMdiIcon(script.icon).then(svg => { preview.innerHTML = svg; });
        } else {
            preview.innerHTML = '';
        }

        title.textContent = t('scripts.dialog.edit');
        scriptFormDirty = false;

        document.body.classList.add('dialog-open');
        dialog.showModal();
    } catch (error) {
        console.error('Error loading script for edit:', error);
        showToast('Failed to load script details', 'error');
    }
}

async function closeScriptDialog() {
    if (scriptFormDirty) {
        if (!await showConfirm(t('scripts.confirm.unsaved'))) {
            return;
        }
    }

    const dialog = document.getElementById('scriptDialog');
    scriptFormDirty = false;
    dialog.close();
    document.body.classList.remove('dialog-open');
}

async function saveScript(event) {
    event.preventDefault();

    const submitBtn = event.target.querySelector('button[type="submit"]');
    if (submitBtn) submitBtn.disabled = true;

    const token = localStorage.getItem('media_server_token');
    const isEdit = document.getElementById('scriptIsEdit').value === 'true';
    const scriptName = isEdit ?
        document.getElementById('scriptOriginalName').value :
        document.getElementById('scriptName').value;

    const data = {
        command: document.getElementById('scriptCommand').value,
        label: document.getElementById('scriptLabel').value || null,
        description: document.getElementById('scriptDescription').value || '',
        icon: document.getElementById('scriptIcon').value || null,
        timeout: parseInt(document.getElementById('scriptTimeout').value) || 30,
        shell: true
    };

    const endpoint = isEdit ?
        `/api/scripts/update/${scriptName}` :
        `/api/scripts/create/${scriptName}`;

    const method = isEdit ? 'PUT' : 'POST';

    try {
        const response = await fetch(endpoint, {
            method,
            headers: {
                'Authorization': `Bearer ${token}`,
                'Content-Type': 'application/json'
            },
            body: JSON.stringify(data)
        });

        const result = await response.json();

        if (response.ok && result.success) {
            showToast(`Script ${isEdit ? 'updated' : 'created'} successfully`, 'success');
            scriptFormDirty = false;
            closeScriptDialog();
        } else {
            showToast(result.detail || `Failed to ${isEdit ? 'update' : 'create'} script`, 'error');
        }
    } catch (error) {
        console.error('Error saving script:', error);
        showToast(`Error ${isEdit ? 'updating' : 'creating'} script`, 'error');
    } finally {
        if (submitBtn) submitBtn.disabled = false;
    }
}

async function deleteScriptConfirm(scriptName) {
    if (!await showConfirm(t('scripts.confirm.delete').replace('{name}', scriptName))) {
        return;
    }

    const token = localStorage.getItem('media_server_token');

    try {
        const response = await fetch(`/api/scripts/delete/${scriptName}`, {
            method: 'DELETE',
            headers: {
                'Authorization': `Bearer ${token}`
            }
        });

        const result = await response.json();

        if (response.ok && result.success) {
            showToast('Script deleted successfully', 'success');
        } else {
            showToast(result.detail || 'Failed to delete script', 'error');
        }
    } catch (error) {
        console.error('Error deleting script:', error);
        showToast('Error deleting script', 'error');
    }
}

// ============================================================
// Execution Result Dialog (shared by scripts and callbacks)
// ============================================================

function closeExecutionDialog() {
    const dialog = document.getElementById('executionDialog');
    dialog.close();
    document.body.classList.remove('dialog-open');
}

function showExecutionResult(name, result, type = 'script') {
    const dialog = document.getElementById('executionDialog');
    const title = document.getElementById('executionDialogTitle');
    const statusDiv = document.getElementById('executionStatus');
    const outputSection = document.getElementById('outputSection');
    const errorSection = document.getElementById('errorSection');
    const outputPre = document.getElementById('executionOutput');
    const errorPre = document.getElementById('executionError');

    title.textContent = `Execution Result: ${name}`;

    const success = result.success && result.exit_code === 0;
    const statusClass = success ? 'success' : 'error';
    const statusText = success ? 'Success' : 'Failed';

    statusDiv.innerHTML = `
        <div class="status-item ${statusClass}">
            <label>Status</label>
            <value>${statusText}</value>
        </div>
        <div class="status-item">
            <label>Exit Code</label>
            <value>${result.exit_code !== undefined ? result.exit_code : 'N/A'}</value>
        </div>
        <div class="status-item">
            <label>Duration</label>
            <value>${result.execution_time !== undefined && result.execution_time !== null ? result.execution_time.toFixed(3) + 's' : 'N/A'}</value>
        </div>
    `;

    outputSection.style.display = 'block';
    if (result.stdout && result.stdout.trim()) {
        outputPre.textContent = result.stdout;
    } else {
        outputPre.textContent = '(no output)';
        outputPre.style.fontStyle = 'italic';
        outputPre.style.color = 'var(--text-secondary)';
    }

    if (result.stderr && result.stderr.trim()) {
        errorSection.style.display = 'block';
        errorPre.textContent = result.stderr;
        errorPre.style.fontStyle = 'normal';
        errorPre.style.color = 'var(--error)';
    } else if (!success && result.error) {
        errorSection.style.display = 'block';
        errorPre.textContent = result.error;
        errorPre.style.fontStyle = 'normal';
        errorPre.style.color = 'var(--error)';
    } else {
        errorSection.style.display = 'none';
    }

    dialog.showModal();
}

async function executeScriptDebug(scriptName) {
    const token = localStorage.getItem('media_server_token');
    const dialog = document.getElementById('executionDialog');
    const title = document.getElementById('executionDialogTitle');
    const statusDiv = document.getElementById('executionStatus');

    title.textContent = `Executing: ${scriptName}`;
    statusDiv.innerHTML = `
        <div class="status-item">
            <label>Status</label>
            <value><span class="loading-spinner"></span> Running...</value>
        </div>
    `;
    document.getElementById('outputSection').style.display = 'none';
    document.getElementById('errorSection').style.display = 'none';
    document.body.classList.add('dialog-open');
    dialog.showModal();

    try {
        const response = await fetch(`/api/scripts/execute/${scriptName}`, {
            method: 'POST',
            headers: {
                'Authorization': `Bearer ${token}`,
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({ args: [] })
        });

        const result = await response.json();

        if (response.ok) {
            showExecutionResult(scriptName, result, 'script');
        } else {
            showExecutionResult(scriptName, {
                success: false,
                exit_code: -1,
                error: result.detail || 'Execution failed',
                stderr: result.detail || 'Unknown error'
            }, 'script');
        }
    } catch (error) {
        console.error(`Error executing script ${scriptName}:`, error);
        showExecutionResult(scriptName, {
            success: false,
            exit_code: -1,
            error: error.message,
            stderr: `Network error: ${error.message}`
        }, 'script');
    }
}

async function executeCallbackDebug(callbackName) {
    const token = localStorage.getItem('media_server_token');
    const dialog = document.getElementById('executionDialog');
    const title = document.getElementById('executionDialogTitle');
    const statusDiv = document.getElementById('executionStatus');

    title.textContent = `Executing: ${callbackName}`;
    statusDiv.innerHTML = `
        <div class="status-item">
            <label>Status</label>
            <value><span class="loading-spinner"></span> Running...</value>
        </div>
    `;
    document.getElementById('outputSection').style.display = 'none';
    document.getElementById('errorSection').style.display = 'none';
    document.body.classList.add('dialog-open');
    dialog.showModal();

    try {
        const response = await fetch(`/api/callbacks/execute/${callbackName}`, {
            method: 'POST',
            headers: {
                'Authorization': `Bearer ${token}`,
                'Content-Type': 'application/json'
            }
        });

        const result = await response.json();

        if (response.ok) {
            showExecutionResult(callbackName, result, 'callback');
        } else {
            showExecutionResult(callbackName, {
                success: false,
                exit_code: -1,
                error: result.detail || 'Execution failed',
                stderr: result.detail || 'Unknown error'
            }, 'callback');
        }
    } catch (error) {
        console.error(`Error executing callback ${callbackName}:`, error);
        showExecutionResult(callbackName, {
            success: false,
            exit_code: -1,
            error: error.message,
            stderr: `Network error: ${error.message}`
        }, 'callback');
    }
}