/**
 * Settings Management System
 * Handles loading, saving, and applying user preferences
 */

let userPreferences = {};

// Load preferences on page load
async function loadUserPreferences() {
    try {
        const response = await fetch('/api/user_preferences.php', {
            credentials: 'same-origin'
        });
        const data = await response.json();
        if (data.success) {
            userPreferences = data.preferences;
            applyPreferences();
        }
    } catch (error) {
        console.error('Error loading preferences:', error);
    }
}

// Apply preferences to UI
function applyPreferences() {
    // Rows per page
    const rowsPerPage = userPreferences.rows_per_page || '15';
    const rowsSelect = document.getElementById('rowsPerPage');
    if (rowsSelect) {
        rowsSelect.value = rowsPerPage;
    }

    // Default filters
    const defaultFilters = (userPreferences.default_status_filters || 'Open,Pending,In Progress').split(',');
    document.querySelectorAll('[name="defaultFilters"]').forEach(cb => {
        cb.checked = defaultFilters.includes(cb.value);
    });

    // Table density
    const density = userPreferences.table_density || 'normal';
    const densitySelect = document.getElementById('tableDensity');
    if (densitySelect) {
        densitySelect.value = density;
    }
    document.body.classList.remove('table-compact', 'table-comfortable');
    if (density !== 'normal') {
        document.body.classList.add(`table-${density}`);
    }

    // Timezone - use server default if not set
    const timezone = userPreferences.timezone || window.APP_TIMEZONE || 'America/New_York';
    const timezoneSelect = document.getElementById('userTimezone');
    if (timezoneSelect) {
        timezoneSelect.value = timezone;
    }

    // Notifications
    const notificationsCheckbox = document.getElementById('notificationsEnabled');
    if (notificationsCheckbox) {
        notificationsCheckbox.checked = userPreferences.notifications_enabled !== '0';
    }

    const soundCheckbox = document.getElementById('soundEffects');
    if (soundCheckbox) {
        soundCheckbox.checked = userPreferences.sound_effects !== '0';
    }

    // Toast duration
    const toastDuration = userPreferences.toast_duration || '3000';
    const toastSelect = document.getElementById('toastDuration');
    if (toastSelect) {
        toastSelect.value = toastDuration;
    }
}

// Save preferences
async function saveSettings() {
    const rowsPerPage = document.getElementById('rowsPerPage');
    const tableDensity = document.getElementById('tableDensity');
    const userTimezone = document.getElementById('userTimezone');
    const notificationsEnabled = document.getElementById('notificationsEnabled');
    const soundEffects = document.getElementById('soundEffects');
    const toastDuration = document.getElementById('toastDuration');

    const prefs = {
        rows_per_page: rowsPerPage ? rowsPerPage.value : '15',
        default_status_filters: Array.from(document.querySelectorAll('[name="defaultFilters"]:checked'))
            .map(cb => cb.value).join(',') || 'Open,Pending,In Progress',
        table_density: tableDensity ? tableDensity.value : 'normal',
        timezone: userTimezone ? userTimezone.value : (window.APP_TIMEZONE || 'America/New_York'),
        notifications_enabled: notificationsEnabled ? (notificationsEnabled.checked ? '1' : '0') : '1',
        sound_effects: soundEffects ? (soundEffects.checked ? '1' : '0') : '1',
        toast_duration: toastDuration ? toastDuration.value : '3000'
    };

    try {
        // Save each preference
        for (const [key, value] of Object.entries(prefs)) {
            const response = await fetch('/api/user_preferences.php', {
                method: 'POST',
                credentials: 'same-origin',
                headers: {
                    'Content-Type': 'application/json',
                    'X-CSRF-Token': window.CSRF_TOKEN
                },
                body: JSON.stringify({ key, value })
            });

            const result = await response.json();
            if (!result.success) {
                throw new Error(`Failed to save ${key}`);
            }
        }

        if (typeof toast !== 'undefined') {
            toast.success('Preferences saved successfully!');
        }
        closeSettingsModal();

        // Reload page to apply new preferences
        setTimeout(() => window.location.reload(), 1000);
    } catch (error) {
        if (typeof toast !== 'undefined') {
            toast.error('Error saving preferences');
        }
        console.error('Error saving preferences:', error);
    }
}

// Modal controls
function openSettingsModal() {
    const modal = document.getElementById('settingsModal');
    if (modal) {
        modal.style.display = 'flex';
        document.body.classList.add('modal-open');
        loadUserPreferences();
    }
}

function closeSettingsModal() {
    const modal = document.getElementById('settingsModal');
    if (modal) {
        modal.style.display = 'none';
        document.body.classList.remove('modal-open');
    }
}

// Close modal when clicking on backdrop (outside the settings content)
function closeOnBackdropClick(event) {
    const modal = document.getElementById('settingsModal');
    // Only close if clicking directly on the modal backdrop, not on content
    if (event.target === modal) {
        closeSettingsModal();
    }
}

// Keyboard shortcut to open settings (Alt+S)
document.addEventListener('keydown', (e) => {
    if (e.altKey && e.key === 's') {
        e.preventDefault();
        openSettingsModal();
    }

    // ESC to close modal
    if (e.key === 'Escape') {
        const modal = document.getElementById('settingsModal');
        if (modal && modal.style.display !== 'none' && modal.style.display !== '') {
            closeSettingsModal();
        }
    }
});

// Initialize on page load
document.addEventListener('DOMContentLoaded', loadUserPreferences);