/**
 * config.js - A modular configuration component for the SL Transport Departures app
 * Allows changing settings on the fly, such as orientation (portrait/landscape)
 */

class ConfigManager {
    constructor(options = {}) {
        // Default options
        this.options = {
            configButtonId: 'config-button',
            configModalId: 'config-modal',
            saveToLocalStorage: true,
            defaultOrientation: 'normal',
            defaultDarkMode: 'auto', // 'auto', 'on', or 'off'
            ...options
        };

        // Add updateBackgroundPreview function
        this.updateBackgroundPreview = function() {
            const preview = document.getElementById('background-preview');
            const imageUrl = document.getElementById('background-image-url').value;
            
            if (preview) {
                if (imageUrl && imageUrl.trim() !== '') {
                    preview.innerHTML = `<img src="${imageUrl}" alt="Background preview">`;
                } else {
                    preview.innerHTML = '<div class="no-image">No image selected</div>';
                }
            }
        };
        
        // Configuration state
        this.config = {
            orientation: this.options.defaultOrientation,
            darkMode: this.options.defaultDarkMode,
            backgroundImage: '',
            backgroundOpacity: 0.3, // Default opacity (30%)
            sites: [
                {
                    id: '1411',
                    name: 'Ambassaderna',
                    enabled: true
                }
            ],
            combineSameDirection: true, // Combine departures going in the same direction
            ...this.loadConfig() // Load saved config if available
        };
        
        // Sync configuration with server
        this.syncConfig();
        
        // Create UI elements
        this.createConfigButton();
        this.createConfigModal();
        
        // Add keyboard shortcuts for testing
        this.setupKeyboardShortcuts();
        
        // Apply initial configuration
        this.applyConfig();
    }

    /**
     * Create the configuration button (gear icon)
     */
    createConfigButton() {
        const buttonContainer = document.createElement('div');
        buttonContainer.id = this.options.configButtonId;
        buttonContainer.className = 'config-button';
        buttonContainer.title = 'Settings';
        buttonContainer.setAttribute('role', 'button');
        buttonContainer.setAttribute('aria-label', 'Open settings');
        buttonContainer.setAttribute('tabindex', '0');
        
        buttonContainer.innerHTML = `
            <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24">
                <path d="M12 15.5A3.5 3.5 0 0 1 8.5 12 3.5 3.5 0 0 1 12 8.5a3.5 3.5 0 0 1 3.5 3.5 3.5 3.5 0 0 1-3.5 3.5m7.43-2.53c.04-.32.07-.65.07-.97 0-.32-.03-.66-.07-1l2.11-1.63c.19-.15.24-.42.12-.64l-2-3.46c-.12-.22-.39-.31-.61-.22l-2.49 1c-.52-.39-1.06-.73-1.69-.98l-.37-2.65A.506.506 0 0 0 14 2h-4c-.25 0-.46.18-.5.42l-.37 2.65c-.63.25-1.17.59-1.69.98l-2.49-1c-.22-.09-.49 0-.61.22l-2 3.46c-.13.22-.07.49.12.64L4.57 11c-.04.34-.07.67-.07 1 0 .33.03.65.07.97l-2.11 1.66c-.19.15-.25.42-.12.64l2 3.46c.12.22.39.3.61.22l2.49-1.01c.52.4 1.06.74 1.69.99l.37 2.65c.04.24.25.42.5.42h4c.25 0 .46-.18.5-.42l.37-2.65c.63-.26 1.17-.59 1.69-.99l2.49 1.01c.22.08.49 0 .61-.22l2-3.46c.12-.22.07-.49-.12-.64l-2.11-1.66z" fill="#fff"/>
            </svg>
        `;
        
        buttonContainer.addEventListener('click', () => this.toggleConfigModal());
        buttonContainer.addEventListener('keydown', (e) => {
            if (e.key === 'Enter' || e.key === ' ') {
                e.preventDefault();
                this.toggleConfigModal();
            }
        });
        document.body.appendChild(buttonContainer);
    }

    /**
     * Create the configuration modal
     */
    createConfigModal() {
        const template = document.getElementById('config-modal-template');
        const modalContainer = document.createElement('div');
        modalContainer.id = this.options.configModalId;
        modalContainer.className = 'config-modal';
        modalContainer.style.display = 'none';
        modalContainer.setAttribute('role', 'dialog');
        modalContainer.setAttribute('aria-label', 'Settings');
        modalContainer.setAttribute('aria-modal', 'true');

        // Clone the template content into the modal
        modalContainer.appendChild(template.content.cloneNode(true));

        // Set dynamic values from current config
        modalContainer.querySelector('#orientation-select').value = this.config.orientation;
        modalContainer.querySelector('#dark-mode-select').value = this.config.darkMode;
        modalContainer.querySelector('#background-image-url').value = this.config.backgroundImage || '';
        modalContainer.querySelector('#background-opacity').value = this.config.backgroundOpacity;
        modalContainer.querySelector('#opacity-value').textContent = `${Math.round(this.config.backgroundOpacity * 100)}%`;
        modalContainer.querySelector('#combine-directions').checked = this.config.combineSameDirection;

        // Populate sites
        const sitesContainer = modalContainer.querySelector('#sites-container');
        if (sitesContainer) {
            sitesContainer.innerHTML = this.generateSitesHTML();
        }

        // Update background preview
        const preview = modalContainer.querySelector('#background-preview');
        if (preview && this.config.backgroundImage) {
            const img = document.createElement('img');
            img.src = this.config.backgroundImage;
            img.alt = 'Background preview';
            preview.innerHTML = '';
            preview.appendChild(img);
        }

        document.body.appendChild(modalContainer);
        
        // Add tab switching functionality
        this.setupTabs(modalContainer);
        
        // Add event listeners
        const closeBtn = modalContainer.querySelector('.config-modal-close');
        closeBtn.addEventListener('click', () => this.hideConfigModal());
        closeBtn.addEventListener('keydown', (e) => {
            if (e.key === 'Enter' || e.key === ' ') {
                e.preventDefault();
                this.hideConfigModal();
            }
        });
        modalContainer.querySelector('#config-cancel-button').addEventListener('click', () => this.hideConfigModal());
        modalContainer.querySelector('#config-save-button').addEventListener('click', () => this.saveAndApplyConfig());
        modalContainer.querySelector('#test-image-button').addEventListener('click', () => {
            const testImageUrl = 'https://images.unsplash.com/photo-1509356843151-3e7d96241e11?q=80&w=1000';
            document.getElementById('background-image-url').value = testImageUrl;
            this.updateBackgroundPreview();
        });
        
        // Add event listener for add site button
        const addSiteButton = modalContainer.querySelector('#add-site-button');
        if (addSiteButton) {
            addSiteButton.addEventListener('click', () => this.addNewSite());
        }
        
        // Add event listeners for site search
        const searchSiteButton = modalContainer.querySelector('#search-site-button');
        const siteSearchInput = modalContainer.querySelector('#site-search-input');
        if (searchSiteButton && siteSearchInput) {
            searchSiteButton.addEventListener('click', () => this.searchSites());
            siteSearchInput.addEventListener('keypress', (e) => {
                if (e.key === 'Enter') {
                    this.searchSites();
                }
            });
        }
        
        // Add event listener for map selection
        const selectFromMapButton = modalContainer.querySelector('#select-from-map-button');
        if (selectFromMapButton) {
            selectFromMapButton.addEventListener('click', () => this.showMapSelector());
        }
        
        // Add event listener for local image selection
        const localImageInput = modalContainer.querySelector('#local-image-input');
        if (localImageInput) {
            localImageInput.addEventListener('change', (event) => {
                const file = event.target.files[0];
                if (file) {
                    const reader = new FileReader();
                    reader.onload = (e) => {
                        const imageDataUrl = e.target.result;
                        document.getElementById('background-image-url').value = imageDataUrl;
                        this.updateBackgroundPreview();
                    };
                    reader.readAsDataURL(file);
                }
            });
        }
        
        // Close modal when clicking outside the content
        modalContainer.addEventListener('click', (event) => {
            if (event.target === modalContainer) {
                this.hideConfigModal();
            }
        });
        
        // Add event listeners for site management
        this.setupSiteEventListeners();
    }

    /**
     * Setup event listeners for site management
     */
    setupSiteEventListeners() {
        const sitesContainer = document.getElementById('sites-container');
        if (!sitesContainer) return;
        
        const removeButtons = sitesContainer.querySelectorAll('.remove-site-button');
        removeButtons.forEach(button => {
            button.addEventListener('click', (event) => {
                const siteItem = event.target.closest('.site-item');
                if (siteItem) {
                    const index = parseInt(siteItem.dataset.index);
                    this.removeSite(index);
                }
            });
        });
    }

    /**
     * Add a new site to the configuration
     */
    addNewSite() {
        this.config.sites.push({
            id: '',
            name: 'New Site',
            enabled: true
        });
        
        const sitesContainer = document.getElementById('sites-container');
        if (sitesContainer) {
            sitesContainer.innerHTML = this.generateSitesHTML();
            this.setupSiteEventListeners();
        }
    }

    /**
     * Remove a site from the configuration
     */
    removeSite(index) {
        if (index >= 0 && index < this.config.sites.length) {
            this.config.sites.splice(index, 1);
            
            const sitesContainer = document.getElementById('sites-container');
            if (sitesContainer) {
                sitesContainer.innerHTML = this.generateSitesHTML();
                this.setupSiteEventListeners();
            }
        }
    }

    /**
     * Setup tab switching functionality
     */
    setupTabs(modalContainer) {
        const tabs = modalContainer.querySelectorAll('.config-tab');
        const tabContents = modalContainer.querySelectorAll('.config-tab-content');
        
        tabs.forEach(tab => {
            tab.addEventListener('click', () => {
                const targetTab = tab.dataset.tab;
                
                // Remove active class from all tabs and contents
                tabs.forEach(t => t.classList.remove('active'));
                tabContents.forEach(content => content.classList.remove('active'));
                
                // Add active class to clicked tab and corresponding content
                tab.classList.add('active');
                const targetContent = modalContainer.querySelector(`#tab-${targetTab}`);
                if (targetContent) {
                    targetContent.classList.add('active');
                }
            });
        });
    }

    /**
     * Toggle the configuration modal visibility
     */
    toggleConfigModal() {
        const modal = document.getElementById(this.options.configModalId);
        if (modal.style.display === 'none') {
            this.showConfigModal();
        } else {
            this.hideConfigModal();
        }
    }

    /**
     * Hide the configuration modal
     */
    hideConfigModal() {
        const modal = document.getElementById(this.options.configModalId);
        modal.style.display = 'none';
        const configButton = document.getElementById(this.options.configButtonId);
        if (configButton) configButton.focus();
    }

    /**
     * Show the configuration modal
     */
    showConfigModal() {
        const modal = document.getElementById(this.options.configModalId);
        modal.style.display = 'flex';
        const closeBtn = modal.querySelector('.config-modal-close');
        if (closeBtn) closeBtn.focus();
        
        // Reset to first tab
        const tabs = modal.querySelectorAll('.config-tab');
        const tabContents = modal.querySelectorAll('.config-tab-content');
        tabs.forEach(t => t.classList.remove('active'));
        tabContents.forEach(content => content.classList.remove('active'));
        if (tabs.length > 0) {
            tabs[0].classList.add('active');
        }
        if (tabContents.length > 0) {
            tabContents[0].classList.add('active');
        }
        
        // Update form values to match current config
        document.getElementById('orientation-select').value = this.config.orientation;
        document.getElementById('dark-mode-select').value = this.config.darkMode;
        document.getElementById('combine-directions').checked = this.config.combineSameDirection;
        
        // Update sites container
        const sitesContainer = document.getElementById('sites-container');
        if (sitesContainer) {
            sitesContainer.innerHTML = this.generateSitesHTML();
            this.setupSiteEventListeners();
        }
        
        // Update background image and opacity values
        const backgroundImageUrl = document.getElementById('background-image-url');
        const backgroundOpacity = document.getElementById('background-opacity');
        const opacityValue = document.getElementById('opacity-value');
        
        if (backgroundImageUrl) {
            backgroundImageUrl.value = this.config.backgroundImage || '';
        }
        
        if (backgroundOpacity) {
            backgroundOpacity.value = this.config.backgroundOpacity;
        }
        
        if (opacityValue) {
            opacityValue.textContent = `${Math.round(this.config.backgroundOpacity * 100)}%`;
        }
        
        // Update background preview
        this.updateBackgroundPreview();
        
        // Update sun times display
        this.updateSunTimesDisplay();
        
        // Add event listeners
        this.setupModalEventListeners();
    }

    /**
     * Setup event listeners for the modal
     */
    setupModalEventListeners() {
        // Background image URL input
        const imageUrlInput = document.getElementById('background-image-url');
        if (imageUrlInput) {
            const newInput = imageUrlInput.cloneNode(true);
            imageUrlInput.parentNode.replaceChild(newInput, imageUrlInput);
            newInput.addEventListener('input', () => this.updateBackgroundPreview());
        }
        
        // Opacity slider
        const opacitySlider = document.getElementById('background-opacity');
        if (opacitySlider) {
            const newSlider = opacitySlider.cloneNode(true);
            opacitySlider.parentNode.replaceChild(newSlider, opacitySlider);
            newSlider.addEventListener('input', (e) => {
                document.getElementById('opacity-value').textContent = `${Math.round(e.target.value * 100)}%`;
            });
        }
        
        // Local image selection
        const localImageInput = document.getElementById('local-image-input');
        if (localImageInput) {
            const newInput = localImageInput.cloneNode(true);
            localImageInput.parentNode.replaceChild(newInput, localImageInput);
            newInput.addEventListener('change', (event) => {
                const file = event.target.files[0];
                if (file) {
                    const reader = new FileReader();
                    reader.onload = (e) => {
                        document.getElementById('background-image-url').value = e.target.result;
                        this.updateBackgroundPreview();
                    };
                    reader.readAsDataURL(file);
                }
            });
        }
    }

    /**
     * Save and apply the configuration from the form
     */
    saveAndApplyConfig() {
        try {
            // Get values from form
            const orientationSelect = document.getElementById('orientation-select');
            const darkModeSelect = document.getElementById('dark-mode-select');
            const backgroundImageUrl = document.getElementById('background-image-url');
            const backgroundOpacity = document.getElementById('background-opacity');
            const combineDirections = document.getElementById('combine-directions');
            
            // Get sites configuration from form
            const sitesConfig = this.getSitesFromForm();
            
            // Get the background image URL directly from the DOM
            const imageUrlValue = document.querySelector('#background-image-url').value;
            
            // Update config
            this.config.orientation = orientationSelect.value;
            this.config.darkMode = darkModeSelect.value;
            this.config.backgroundImage = imageUrlValue;
            this.config.backgroundOpacity = parseFloat(backgroundOpacity.value);
            this.config.combineSameDirection = combineDirections.checked;
            this.config.sites = sitesConfig;
            
            // Save config
            this.saveConfig();
            
            // Sync with server
            this.syncConfig();
            
            // Apply config
            this.applyConfig();
            
            // Hide modal
            this.hideConfigModal();
        } catch (error) {
            console.error('Error saving configuration:', error);
        }
    }

    /**
     * Apply the current configuration to the page
     */
    applyConfig() {
        // Apply orientation
        document.body.classList.remove('normal', 'landscape', 'vertical', 'upsidedown', 'vertical-reverse');
        document.body.classList.add(this.config.orientation);
        
        // Apply dark mode setting
        this.applyDarkModeSetting();
        
        // Apply background image and opacity
        this.applyBackgroundImage();
        
        // Ensure content wrapper exists when changing to rotated modes
        if (['vertical', 'upsidedown', 'vertical-reverse'].includes(this.config.orientation)) {
            this.ensureContentWrapper();
        }
        
        // Dispatch event for other components to react to config changes
        const event = new CustomEvent('configChanged', { detail: { config: this.config } });
        document.dispatchEvent(event);
    }

    /**
     * Apply dark mode setting based on configuration
     */
    applyDarkModeSetting() {
        // Always update sun times display for informational purposes
        this.updateSunTimesDisplay();
        
        // If we have a WeatherManager instance
        if (window.weatherManager) {
            if (this.config.darkMode === 'auto') {
                window.weatherManager.updateDarkModeBasedOnTime();
            } else {
                const isDarkMode = this.config.darkMode === 'on';
                window.weatherManager.setDarkMode(isDarkMode);
            }
        } else {
            const isDarkMode = this.config.darkMode === 'on';
            document.body.classList.toggle('dark-mode', isDarkMode);
        }
    }

    /**
     * Apply background image and opacity settings
     */
    applyBackgroundImage() {
        // Remove any existing background overlay
        const existingOverlay = document.getElementById('background-overlay');
        if (existingOverlay) {
            existingOverlay.remove();
        }
        
        // If there's a background image URL, create and apply the overlay
        if (this.config.backgroundImage && this.config.backgroundImage.trim() !== '') {
            const overlay = document.createElement('div');
            overlay.id = 'background-overlay';
            overlay.style.backgroundImage = `url(${this.config.backgroundImage})`;
            overlay.style.opacity = this.config.backgroundOpacity;
            overlay.className = `orientation-${this.config.orientation}`;

            // Insert as the first child of body
            document.body.insertBefore(overlay, document.body.firstChild);
        }
    }

    /**
     * Update the sun times display in the config modal
     */
    updateSunTimesDisplay() {
        if (window.weatherManager) {
            const sunriseElement = document.getElementById('sunrise-time');
            const sunsetElement = document.getElementById('sunset-time');
            
            if (sunriseElement && sunsetElement) {
                const sunriseTime = window.weatherManager.getSunriseTime();
                const sunsetTime = window.weatherManager.getSunsetTime();
                
                sunriseElement.textContent = sunriseTime;
                sunsetElement.textContent = sunsetTime;
                
                const weatherSunTimesElement = document.querySelector('#custom-weather .sun-times');
                if (weatherSunTimesElement) {
                    weatherSunTimesElement.textContent = `☀️ Sunrise: ${sunriseTime} | 🌙 Sunset: ${sunsetTime}`;
                }
            }
        }
    }

    /**
     * Generate HTML for sites configuration
     */
    generateSitesHTML() {
        if (!this.config.sites || this.config.sites.length === 0) {
            return '<div class="no-sites">No sites configured</div>';
        }
        
        return this.config.sites.map((site, index) => `
            <div class="site-item" data-index="${index}">
                <div class="config-site-flex">
                    <input type="checkbox" class="site-enabled" ${site.enabled ? 'checked' : ''}>
                    <input type="text" class="site-name config-site-name-input" value="${site.name}" placeholder="Site Name">
                    <button class="remove-site-button config-btn-remove">×</button>
                </div>
                <div class="config-site-id-row">
                    <span class="config-site-id-label">ID:</span>
                    <input type="text" class="site-id config-site-id-input" value="${site.id}" placeholder="Site ID">
                </div>
            </div>
        `).join('');
    }

    /**
     * Search for transit sites
     */
    async searchSites() {
        const searchInput = document.getElementById('site-search-input');
        const resultsContainer = document.getElementById('site-search-results');
        
        if (!searchInput || !resultsContainer) return;
        
        const query = searchInput.value.trim();
        if (!query || query.length < 2) {
            resultsContainer.style.display = 'none';
            return;
        }
        
        try {
            resultsContainer.style.display = 'block';
            resultsContainer.textContent = 'Searching...';
            
            const response = await fetch(`/api/sites/search?q=${encodeURIComponent(query)}`);
            
            if (!response.ok) {
                const errorData = await response.json().catch(() => ({ error: `HTTP ${response.status}` }));
                throw new Error(errorData.error || `HTTP error! Status: ${response.status}`);
            }
            
            const data = await response.json();
            
            if (!data.sites || data.sites.length === 0) {
                resultsContainer.textContent = 'No sites found. Try a different search term.';
                return;
            }
            
            resultsContainer.innerHTML = '';
            data.sites.forEach(site => {
                const resultDiv = document.createElement('div');
                resultDiv.className = 'site-search-result';
                resultDiv.dataset.siteId = site.id;
                resultDiv.dataset.siteName = site.name;

                const nameDiv = document.createElement('div');
                nameDiv.textContent = site.name;
                const idDiv = document.createElement('div');
                idDiv.textContent = `ID: ${site.id}`;

                resultDiv.appendChild(nameDiv);
                resultDiv.appendChild(idDiv);

                resultDiv.addEventListener('click', () => {
                    this.addSiteFromSearch(site.id, site.name);
                    searchInput.value = '';
                    resultsContainer.style.display = 'none';
                });

                resultsContainer.appendChild(resultDiv);
            });
            
        } catch (error) {
            console.error('Error searching sites:', error);
            let errorMessage = error.message || 'Unknown error';
            
            // Provide more helpful error messages
            if (error.message.includes('Failed to fetch') || error.message.includes('NetworkError')) {
                errorMessage = 'Unable to connect to server. Please make sure the server is running.';
            } else if (error.message.includes('HTTP')) {
                errorMessage = `Server error: ${error.message}`;
            }
            
            resultsContainer.textContent = `Error: ${errorMessage}`;
        }
    }
    
    /**
     * Add a site from search results
     */
    addSiteFromSearch(siteId, siteName) {
        // Check if site already exists
        if (this.config.sites.some(site => site.id === siteId)) {
            alert(`Site "${siteName}" (ID: ${siteId}) is already in your list.`);
            return;
        }
        
        this.config.sites.push({
            id: siteId,
            name: siteName,
            enabled: true
        });
        
        const sitesContainer = document.getElementById('sites-container');
        if (sitesContainer) {
            sitesContainer.innerHTML = this.generateSitesHTML();
            this.setupSiteEventListeners();
        }
    }

    /**
     * Show map selector for choosing transit sites
     */
    async showMapSelector() {
        // Create map modal
        const mapModal = document.createElement('div');
        mapModal.id = 'map-selector-modal';
        mapModal.className = 'config-modal';
        mapModal.style.display = 'flex';
        
        mapModal.innerHTML = `
            <div class="config-modal-content" style="max-width: 90vw; max-height: 90vh; width: 1200px;">
                <div class="config-modal-header">
                    <h2>Select Transit Stop from Map</h2>
                    <span class="map-modal-close">&times;</span>
                </div>
                <div style="padding: 20px;">
                    <div style="margin-bottom: 15px;">
                        <input type="text" id="map-search-input" placeholder="Search area or zoom to location..." style="width: 100%; padding: 8px; border: 1px solid #ddd; border-radius: 4px;">
                    </div>
                    <div id="map-container" style="width: 100%; height: 600px; border: 1px solid #ddd; border-radius: 4px;"></div>
                    <div style="margin-top: 15px; padding: 10px; background-color: #f0f0f0; border-radius: 4px;">
                        <strong>Instructions:</strong> Click on a marker to select a transit stop. Zoom and pan to explore the map.
                    </div>
                </div>
                <div class="config-modal-footer">
                    <button id="map-close-button">Close</button>
                </div>
            </div>
        `;
        
        document.body.appendChild(mapModal);
        
        // Wait for DOM to be ready
        await new Promise(resolve => setTimeout(resolve, 100));
        
        // Initialize map centered on Stockholm
        const map = L.map('map-container').setView([59.3293, 18.0686], 13);
        
        // Add OpenStreetMap tiles
        L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
            attribution: '© OpenStreetMap contributors',
            maxZoom: 19
        }).addTo(map);
        
        // Close handlers
        const closeMap = () => {
            map.remove();
            document.body.removeChild(mapModal);
        };
        
        mapModal.querySelector('.map-modal-close').addEventListener('click', closeMap);
        mapModal.querySelector('#map-close-button').addEventListener('click', closeMap);
        mapModal.addEventListener('click', (e) => {
            if (e.target === mapModal) closeMap();
        });
        
        // Load nearby transit stops based on map center
        const markersLayer = L.layerGroup().addTo(map);
        const loadedSiteIds = new Set();

        const loadNearbySites = async () => {
            const center = map.getCenter();
            const zoom = map.getZoom();
            // Scale radius based on zoom: wider view = larger radius
            const radius = zoom >= 15 ? 500 : zoom >= 13 ? 1500 : zoom >= 11 ? 4000 : 8000;

            try {
                const response = await fetch(`/api/sites/nearby?lat=${center.lat}&lon=${center.lng}&radius=${radius}`);
                const data = await response.json();

                if (data.sites) {
                    data.sites.forEach(site => {
                        if (loadedSiteIds.has(site.id)) return;
                        const lat = parseFloat(site.lat);
                        const lon = parseFloat(site.lon);
                        if (!lat || !lon || isNaN(lat) || isNaN(lon)) return;

                        loadedSiteIds.add(site.id);

                        const customIcon = L.divIcon({
                            className: 'custom-marker',
                            html: '<div style="background-color: #0061a1; color: white; border-radius: 50%; width: 30px; height: 30px; display: flex; align-items: center; justify-content: center; font-weight: bold; border: 3px solid white; box-shadow: 0 2px 4px rgba(0,0,0,0.3);">&#x1F68C;</div>',
                            iconSize: [30, 30],
                            iconAnchor: [15, 15]
                        });

                        const marker = L.marker([lat, lon], { icon: customIcon });

                        const popupContent = `
                            <div style="min-width: 200px;">
                                <strong style="font-size: 1.1em; color: #0061a1;">${site.name}</strong><br>
                                <span style="color: #666; font-size: 0.9em;">ID: ${site.id}</span><br>
                                <button class="select-site-from-map" data-site-id="${site.id}" data-site-name="${site.name}"
                                        style="margin-top: 8px; padding: 8px 15px; width: 100%; background-color: #0061a1; color: white; border: none; border-radius: 4px; cursor: pointer; font-weight: bold;">
                                    Select This Stop
                                </button>
                            </div>
                        `;

                        marker.bindPopup(popupContent);
                        markersLayer.addLayer(marker);
                    });
                    console.log(`Loaded ${data.sites.length} nearby sites (${loadedSiteIds.size} total on map)`);
                }
            } catch (error) {
                console.error('Error loading nearby sites:', error);
            }
        };

        // Load sites on init and when map is panned/zoomed
        setTimeout(() => loadNearbySites(), 300);
        map.on('moveend', loadNearbySites);
        
        // Handle site selection from map popup - use event delegation on the modal
        mapModal.addEventListener('click', (e) => {
            if (e.target.classList.contains('select-site-from-map')) {
                e.preventDefault();
                e.stopPropagation();
                const siteId = e.target.dataset.siteId;
                const siteName = e.target.dataset.siteName;
                if (siteId && siteName) {
                    console.log(`Selecting site: ${siteName} (ID: ${siteId})`);
                    this.addSiteFromSearch(siteId, siteName);
                    closeMap();
                }
            }
        });
        
        // Also handle popupopen event to ensure buttons are clickable
        map.on('popupopen', (e) => {
            const popup = e.popup;
            const content = popup.getElement();
            if (content) {
                const selectBtn = content.querySelector('.select-site-from-map');
                if (selectBtn) {
                    selectBtn.addEventListener('click', (ev) => {
                        ev.preventDefault();
                        ev.stopPropagation();
                        const siteId = selectBtn.dataset.siteId;
                        const siteName = selectBtn.dataset.siteName;
                        if (siteId && siteName) {
                            console.log(`Selecting site from popup: ${siteName} (ID: ${siteId})`);
                            this.addSiteFromSearch(siteId, siteName);
                            closeMap();
                        }
                    });
                }
            }
        });
        
        // Map search functionality
        const mapSearchInput = document.getElementById('map-search-input');
        if (mapSearchInput) {
            mapSearchInput.addEventListener('keypress', async (e) => {
                if (e.key === 'Enter') {
                    const query = mapSearchInput.value.trim();
                    if (query.length < 2) return;
                    
                    try {
                        const response = await fetch(`/api/sites/search?q=${encodeURIComponent(query)}`);
                        const data = await response.json();
                        
                        if (data.sites && data.sites.length > 0) {
                            // Clear existing markers and reset tracking
                            markersLayer.clearLayers();
                            loadedSiteIds.clear();

                            const searchMarkers = [];
                            data.sites.forEach(site => {
                                const lat = parseFloat(site.lat);
                                const lon = parseFloat(site.lon);
                                if (!lat || !lon || isNaN(lat) || isNaN(lon)) return;

                                loadedSiteIds.add(site.id);

                                const customIcon = L.divIcon({
                                    className: 'custom-marker',
                                    html: '<div style="background-color: #28a745; color: white; border-radius: 50%; width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; font-weight: bold; border: 3px solid white; box-shadow: 0 2px 8px rgba(0,0,0,0.4); font-size: 18px;">&#x1F68C;</div>',
                                    iconSize: [32, 32],
                                    iconAnchor: [16, 16]
                                });

                                const marker = L.marker([lat, lon], { icon: customIcon });
                                marker.bindPopup(`
                                    <div style="min-width: 200px;">
                                        <strong style="font-size: 1.1em; color: #0061a1;">${site.name}</strong><br>
                                        <span style="color: #666; font-size: 0.9em;">ID: ${site.id}</span><br>
                                        <button class="select-site-from-map" data-site-id="${site.id}" data-site-name="${site.name}"
                                                style="margin-top: 8px; padding: 8px 15px; width: 100%; background-color: #0061a1; color: white; border: none; border-radius: 4px; cursor: pointer; font-weight: bold;">
                                            Select This Stop
                                        </button>
                                    </div>
                                `);
                                markersLayer.addLayer(marker);
                                searchMarkers.push(marker);
                            });

                            if (searchMarkers.length > 0) {
                                const group = new L.featureGroup(searchMarkers);
                                map.fitBounds(group.getBounds().pad(0.1));
                            }
                        }
                    } catch (error) {
                        console.error('Error searching on map:', error);
                    }
                }
            });
        }
    }

    /**
     * Get sites configuration from form
     */
    getSitesFromForm() {
        const sitesContainer = document.getElementById('sites-container');
        const siteItems = sitesContainer.querySelectorAll('.site-item');
        
        return Array.from(siteItems).map(item => {
            return {
                id: item.querySelector('.site-id').value,
                name: item.querySelector('.site-name').value,
                enabled: item.querySelector('.site-enabled').checked
            };
        });
    }

    /**
     * Sync configuration with server
     */
    syncConfig() {
        fetch('/api/config/update', {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify(this.config)
        })
        .then(response => response.json())
        .then(data => {
            console.log('Configuration synced with server:', data);
        })
        .catch(error => {
            console.error('Error syncing configuration with server:', error);
        });
    }

    /**
     * Save the configuration to localStorage
     */
    saveConfig() {
        if (this.options.saveToLocalStorage && window.localStorage) {
            try {
                localStorage.setItem('sl-departures-config', JSON.stringify(this.config));
                console.log('Configuration saved to localStorage');
            } catch (error) {
                console.error('Error saving configuration to localStorage:', error);
            }
        }
    }

    /**
     * Load the configuration from localStorage
     */
    loadConfig() {
        if (this.options.saveToLocalStorage && window.localStorage) {
            try {
                const savedConfig = localStorage.getItem('sl-departures-config');
                if (savedConfig) {
                    console.log('Configuration loaded from localStorage');
                    return JSON.parse(savedConfig);
                }
            } catch (error) {
                console.error('Error loading configuration from localStorage:', error);
            }
        }
        return {};
    }

    /**
     * Setup keyboard shortcuts for testing
     */
    setupKeyboardShortcuts() {
        document.addEventListener('keydown', (event) => {
            // Only handle keyboard shortcuts if not in an input field
            if (event.target.tagName === 'INPUT' || event.target.tagName === 'TEXTAREA') {
                return;
            }

            // Ctrl/Cmd + Shift + O: Toggle orientation
            if (event.key === 'O' && (event.ctrlKey || event.metaKey) && event.shiftKey) {
                event.preventDefault();
                const orientations = ['normal', 'vertical', 'upsidedown', 'vertical-reverse', 'landscape'];
                const currentIndex = orientations.indexOf(this.config.orientation);
                const nextIndex = (currentIndex + 1) % orientations.length;
                this.config.orientation = orientations[nextIndex];
                this.applyConfig();
                this.saveConfig();
            }

            // Ctrl/Cmd + Shift + D: Toggle dark mode
            if (event.key === 'D' && (event.ctrlKey || event.metaKey) && event.shiftKey) {
                event.preventDefault();
                const modes = ['auto', 'on', 'off'];
                const currentIndex = modes.indexOf(this.config.darkMode);
                const nextIndex = (currentIndex + 1) % modes.length;
                this.config.darkMode = modes[nextIndex];
                this.applyConfig();
                this.saveConfig();
            }
        });
    }

    /**
     * Ensure content wrapper exists for rotated orientations
     */
    ensureContentWrapper() {
        if (!document.getElementById('content-wrapper')) {
            console.log('Creating content wrapper');
            const wrapper = document.createElement('div');
            wrapper.id = 'content-wrapper';
            
            // Move all body children to the wrapper except config elements
            const configElements = ['config-button', 'config-modal', 'background-overlay'];
            
            // Create an array of nodes to move (can't modify while iterating)
            const nodesToMove = [];
            for (let i = 0; i < document.body.children.length; i++) {
                const child = document.body.children[i];
                if (!configElements.includes(child.id) && child.id !== 'content-wrapper') {
                    nodesToMove.push(child);
                }
            }
            
            // Move the nodes to the wrapper
            nodesToMove.forEach(node => {
                wrapper.appendChild(node);
            });
            
            // Add the wrapper back to the body
            document.body.appendChild(wrapper);
        }
    }
}

// ES module export
export { ConfigManager };

// Keep window reference for backward compatibility
window.ConfigManager = ConfigManager;