const GridLayout = {
    defaults: {
        type: 'default',
        columns: 6,
        gap: 16,
        size: 80,
        resizable: false
    },
    
    layouts: {
        default: {
            columns: 6,
            gap: 16,
            size: 80
        },
        compact: {
            columns: 5,
            gap: 8,
            size: 70
        },
        comfortable: {
            columns: 3,
            gap: 24,
            size: 100
        },
        list: {
            columns: 1,
            gap: 12,
            size: 60
        },
        custom: {}
    },
    
    init: function() {
        const settings = this.getSettings();
        this.applyLayout(settings);
        this.setupEventListeners();
        this.toggleCustomSettings(settings.type === 'custom');
        this.updateUI(settings);
    },
    
    getSettings: function() {
        const storedSettings = Storage.get('gridLayout');
        return { ...this.defaults, ...storedSettings };
    },
    
    saveSettings: function(settings) {
        Storage.set('gridLayout', settings);
    },
    
    updateUI: function(settings) {
        const layoutTypeSelect = document.getElementById('grid-layout-type');
        if (layoutTypeSelect) {
            layoutTypeSelect.value = settings.type;
            const event = new Event('change');
            layoutTypeSelect.dispatchEvent(event);
            
            const customSelectDiv = layoutTypeSelect.closest('.custom-select');
            if (customSelectDiv) {
                const selectSelected = customSelectDiv.querySelector('.select-selected');
                if (selectSelected) {
                    const selectedOption = layoutTypeSelect.options[layoutTypeSelect.selectedIndex];
                    selectSelected.textContent = selectedOption.textContent;
                }
            }
        }
        
        const columnsInput = document.getElementById('grid-columns');
        const gapInput = document.getElementById('grid-gap');
        const sizeInput = document.getElementById('grid-size');
        
        if (columnsInput) columnsInput.value = settings.columns;
        if (gapInput) gapInput.value = settings.gap;
        if (sizeInput) {
            sizeInput.value = settings.size;
            sizeInput.disabled = !settings.resizable;
            if (!settings.resizable) {
                sizeInput.setAttribute('title', 'Enable \'Resizable Items\' to customize item size');
                sizeInput.style.cursor = 'not-allowed';
            } else {
                sizeInput.removeAttribute('title');
                sizeInput.style.cursor = 'auto';
            }
        }
        
        const resizableToggle = document.getElementById('toggle-resizable');
        if (resizableToggle) resizableToggle.checked = settings.resizable;
        
        this.toggleCustomSettings(settings.type === 'custom');
    },
    
    applyLayout: function(settings) {
        const grid = document.getElementById('shortcuts-grid');
        if (!grid) return;
        
        grid.classList.remove('grid-default', 'grid-compact', 'grid-comfortable', 'grid-list', 'grid-custom');
        grid.classList.add(`grid-${settings.type}`);
        
        if (settings.type === 'custom') {
            grid.style.gridTemplateColumns = `repeat(${settings.columns}, minmax(${settings.size}px, 1fr))`;
            grid.style.gap = `${settings.gap}px`;
        } else {
            const layoutConfig = this.layouts[settings.type];
            if (layoutConfig) {
                grid.style.gridTemplateColumns = `repeat(${layoutConfig.columns}, minmax(${layoutConfig.size}px, 1fr))`;
                grid.style.gap = `${layoutConfig.gap}px`;
                
                if (settings.type === 'list') {
                    grid.style.gridTemplateColumns = '1fr';
                }
            } else {
                grid.style.gridTemplateColumns = '';
                grid.style.gap = '';
            }
        }
        
        this.applyResizable(settings.resizable);
    },
    
    setupEventListeners: function() {
        const layoutTypeSelect = document.getElementById('grid-layout-type');
        if (layoutTypeSelect) {
            layoutTypeSelect.addEventListener('change', () => {
                const settings = this.getSettings();
                settings.type = layoutTypeSelect.value;
                this.saveSettings(settings);
                this.applyLayout(settings);
                this.toggleCustomSettings(settings.type === 'custom');
            });
        }
        
        const columnsInput = document.getElementById('grid-columns');
        const gapInput = document.getElementById('grid-gap');
        const sizeInput = document.getElementById('grid-size');
        
        const validateInputValue = (input) => {
            const min = parseInt(input.getAttribute('min'), 10);
            const max = parseInt(input.getAttribute('max'), 10);
            let value = parseInt(input.value, 10);
            
            if (isNaN(value)) {
                value = parseInt(input.defaultValue, 10);
            }
            
            if (value < min) value = min;
            if (value > max) value = max;
            
            input.value = value;
            return value;
        };
        
        [columnsInput, gapInput, sizeInput].forEach(input => {
            if (input) {
                input.addEventListener('input', () => {
                    validateInputValue(input);
                });
                
                input.addEventListener('change', () => {
                    const value = validateInputValue(input);
                    const settings = this.getSettings();
                    settings[input.id.split('-')[1]] = value;
                    this.saveSettings(settings);
                    this.applyLayout(settings);
                });
            }
        });
        
        const resizableToggle = document.getElementById('toggle-resizable');
        if (resizableToggle) {
            resizableToggle.addEventListener('change', () => {
                const settings = this.getSettings();
                settings.resizable = resizableToggle.checked;
                this.saveSettings(settings);
                this.applyLayout(settings);
                this.toggleItemSizeInput(settings.resizable);
            });
        }
        
        const resetButton = document.getElementById('reset-layout');
        if (resetButton) {
            resetButton.addEventListener('click', () => {
                shortcuts.showConfirmDialog(
                    'Reset Layout',
                    'Are you sure you want to reset the layout settings to default?',
                    () => this.resetToDefaults()
                );
            });
        }
    },
    
    toggleItemSizeInput: function(enabled) {
        const sizeInput = document.getElementById('grid-size');
        if (sizeInput) {
            sizeInput.disabled = !enabled;
            if (enabled) {
                sizeInput.removeAttribute('title');
                sizeInput.style.cursor = 'auto';
            } else {
                sizeInput.setAttribute('title', 'Enable \'Resizable Items\' to customize item size');
                sizeInput.style.cursor = 'not-allowed';
            }
        }
    },
    
    toggleCustomSettings: function(show) {
        const customSettings = document.getElementById('custom-grid-settings');
        if (customSettings) {
            if (show) {
                customSettings.classList.remove('hidden');
            } else {
                customSettings.classList.add('hidden');
            }
        }
    },
    
    applyResizable: function(resizable) {
        const shortcuts = document.querySelectorAll('.shortcut');
        
        shortcuts.forEach(shortcut => {
            const existingHandle = shortcut.querySelector('.resize-handle');
            if (existingHandle) {
                existingHandle.remove();
            }
            
            shortcut.classList.remove('resizable');
            
            if (resizable) {
                shortcut.classList.add('resizable');
                
                const resizeHandle = document.createElement('div');
                resizeHandle.className = 'resize-handle';
                shortcut.appendChild(resizeHandle);
                
                this.setupResizeEvents(shortcut, resizeHandle);
            }
        });
    },
    
    setupResizeEvents: function(shortcut, handle) {
        let startX, startY, startWidth, startHeight;
        
        const startResize = (e) => {
            e.preventDefault();
            shortcut.classList.add('resizing');
            
            startX = e.clientX;
            startY = e.clientY;
            startWidth = shortcut.offsetWidth;
            startHeight = shortcut.offsetHeight;
            
            document.addEventListener('mousemove', resize);
            document.addEventListener('mouseup', stopResize);
        };
        
        const resize = (e) => {
            const newWidth = startWidth + (e.clientX - startX);
            const newHeight = startHeight + (e.clientY - startY);
            
            shortcut.style.width = `${Math.max(80, newWidth)}px`;
            shortcut.style.height = `${Math.max(80, newHeight)}px`;
        };
        
        const stopResize = () => {
            shortcut.classList.remove('resizing');
            document.removeEventListener('mousemove', resize);
            document.removeEventListener('mouseup', stopResize);
        };
        
        handle.addEventListener('mousedown', startResize);
    },
    
    resetToDefaults: function() {
        this.saveSettings(this.defaults);
        this.updateUI(this.defaults);
        this.applyLayout(this.defaults);
        this.toggleCustomSettings(false);
        
        const visibilitySettings = {
            showGreeting: true,
            showSearch: true,
            showShortcuts: true,
            showAddButton: true,
            showGrid: true
        };
        
        Storage.set('visibility', visibilitySettings);
        Storage.set('show_greeting', true);
        Storage.set('show_search', true);
        Storage.set('show_shortcuts', true);
        Storage.set('show_addShortcut', true);
        
        const greetingToggle = document.getElementById('toggle-greeting');
        const searchToggle = document.getElementById('toggle-search');
        const shortcutsToggle = document.getElementById('toggle-shortcuts');
        const addButtonToggle = document.getElementById('toggle-add-shortcut');

        if (greetingToggle) greetingToggle.checked = true;
        if (searchToggle) searchToggle.checked = true;
        if (shortcutsToggle) shortcutsToggle.checked = true;
        if (addButtonToggle) addButtonToggle.checked = true;
        
        const greeting = document.getElementById('greeting');
        const search = document.getElementById('search-container');
        const shortcuts = document.getElementById('shortcuts-grid');
        const addButton = document.getElementById('add-shortcut');
        
        const showElement = (element) => {
            if (element) {
                element.style.visibility = 'visible';
                element.style.opacity = '1';
                element.style.position = 'relative';
                element.style.pointerEvents = 'auto';
            }
        };
        
        showElement(greeting);
        showElement(search);
        showElement(shortcuts);
        showElement(addButton);
    },
    
    reset: function() {
        this.resetToDefaults();
        
        notifications.show('Layout settings reset to defaults.', 'success');
        
        return this.defaults;
    }
};

document.addEventListener('DOMContentLoaded', () => {
    console.log('DOM content loaded - initializing grid layout');
    GridLayout.init();
});

window.addEventListener('load', () => {
    console.log('Window fully loaded - ensuring grid layout is initialized');
    setTimeout(() => {
        if (!window.gridLayoutInitialized) {
            GridLayout.init();
        }
    }, 500);
});