// Global state management
const state = {
    currentProject: null,
    selectedElement: null,
    elements: [],
    history: [],
    historyIndex: -1,
    canvasSize: { width: 800, height: 600 },
    colorPalette: ['#6366F1', '#F59E0B', '#10B981', '#EF4444', '#3B82F6', '#8B5CF6', '#EC4899'],
    fonts: ['Inter', 'Arial', 'Helvetica', 'Times New Roman', 'Courier New', 'Georgia', 'Verdana'],
    darkMode: window.matchMedia('(prefers-color-scheme: dark)').matches
};

// Initialize dark mode
function initDarkMode() {
    if (state.darkMode) {
        document.documentElement.classList.add('dark');
    } else {
        document.documentElement.classList.remove('dark');
    }
}

// Save project to localStorage
function saveProject() {
    if (state.currentProject) {
        const projectData = {
            id: state.currentProject.id,
            name: state.currentProject.name,
            elements: state.elements,
            canvasSize: state.canvasSize,
            createdAt: new Date().toISOString(),
            updatedAt: new Date().toISOString()
        };
        localStorage.setItem(`project_${state.currentProject.id}`, JSON.stringify(projectData));
    }
}

// Load project from localStorage
function loadProject(projectId) {
    const projectData = localStorage.getItem(`project_${projectId}`);
    if (projectData) {
        const parsedData = JSON.parse(projectData);
        state.currentProject = {
            id: parsedData.id,
            name: parsedData.name,
            createdAt: parsedData.createdAt,
            updatedAt: parsedData.updatedAt
        };
        state.elements = parsedData.elements || [];
        state.canvasSize = parsedData.canvasSize || { width: 800, height: 600 };
        
        // Render elements on canvas
        renderElements();
    }
}

// Render elements on canvas
function renderElements() {
    const stage = window.designStage;
    const layer = window.designLayer;
    
    // Clear existing elements
    layer.destroyChildren();
    
    // Set canvas size
    stage.width(state.canvasSize.width);
    stage.height(state.canvasSize.height);
    
    // Render each element
    state.elements.forEach(element => {
        let konvaElement;
        
        switch (element.type) {
            case 'text':
                konvaElement = new Konva.Text({
                    x: element.x,
                    y: element.y,
                    text: element.text,
                    fontSize: element.fontSize,
                    fontFamily: element.fontFamily,
                    fill: element.color,
                    align: element.align,
                    width: element.width,
                    draggable: true
                });
                break;
            case 'image':
                // Image rendering logic
                break;
            case 'shape':
                // Shape rendering logic
                break;
        }
        
        if (konvaElement) {
            layer.add(konvaElement);
        }
    });
    
    stage.add(layer);
}
// Initialize app
document.addEventListener('DOMContentLoaded', () => {
    initDarkMode();
    
    // Listen for dark mode changes
    window.matchMedia('(prefers-color-scheme: dark)').addEventListener('change', e => {
        state.darkMode = e.matches;
        initDarkMode();
    });
    
    // Create new project if none exists
    if (!state.currentProject) {
        state.currentProject = {
            id: Date.now().toString(),
            name: 'Novo Projeto',
            createdAt: new Date().toISOString(),
            updatedAt: new Date().toISOString()
        };
    }

    // Initialize stage events
    setupStageEvents();
});

function setupStageEvents() {
    const stage = window.designStage;
    const layer = window.designLayer;

    stage.on('click tap', (e) => {
        // Deselect previous element
        if (state.selectedElement) {
            state.selectedElement.stroke(null);
            state.selectedElement = null;
        }

        // If clicked on empty space, return
        if (e.target === stage) return;

        // Select clicked element
        state.selectedElement = e.target;
        e.target.stroke('#6366f1');

        // Update properties panel
        updatePropertiesPanel(e.target);
        stage.batchDraw();
    });
}

function updatePropertiesPanel(element) {
    const panel = document.querySelector('custom-properties-panel').shadowRoot;
    
    if (element instanceof Konva.Text) {
        panel.getElementById('text-content').value = element.text();
        panel.getElementById('text-font').value = element.fontFamily();
        panel.getElementById('text-size').value = element.fontSize();
    }
}