class ToolManager {
    constructor(app) {
        this.app = app;
        this.currentTool = 'pointer';
        this.snapToGrid = true;
        
        // Tool-specific state
        this.isDrawing = false;
        this.isPanning = false;
        this.isDraggingElement = false;
        this.isRotatingElement = false;
        
        // Drawing state
        this.startX = 0;
        this.startY = 0;
        
        // Panning state
        this.lastPanX = 0;
        this.lastPanY = 0;
        
        // Element manipulation state
        this.draggedElement = null;
        this.dragStartX = 0;
        this.dragStartY = 0;
        this.rotatedElement = null;
        this.rotateStartAngle = 0;
    }

    // Set current tool and update UI
    setTool(tool) {
        console.log(`Setting tool to: ${tool}`);
        this.currentTool = tool;
        this.app.uiManager.updateToolButtons(tool);
        this.app.uiManager.updateInstructionText(tool);
        this.updateCanvasCursor(tool);
        console.log(`Current tool is now: ${this.currentTool}`);
    }

    // Update canvas cursor based on current tool
    updateCanvasCursor(tool) {
        const cursors = {
            'pointer': 'default',
            'hand': 'grab',
            'move': 'move',
            'rotate': 'crosshair',
            'room': 'crosshair',
            'wall': 'crosshair',
            'door': 'copy',
            'window': 'copy'
        };
        
        const cursor = cursors[tool] || 'default';
        this.app.canvas.style.cursor = cursor;
        
        // Update during interactions
        if (tool === 'hand') {
            this.app.canvas.addEventListener('mousedown', () => {
                this.app.canvas.style.cursor = 'grabbing';
            });
            this.app.canvas.addEventListener('mouseup', () => {
                this.app.canvas.style.cursor = 'grab';
            });
        }
    }

    // Get current tool
    getCurrentTool() {
        return this.currentTool;
    }

    // Check if currently drawing
    isCurrentlyDrawing() {
        return this.isDrawing;
    }

    // Toggle grid snapping
    toggleSnap() {
        this.snapToGrid = !this.snapToGrid;
        this.updateToggleButton('toggleSnapBtn', this.snapToGrid);
    }

    // Update toggle button appearance
    updateToggleButton(buttonId, isActive) {
        const button = document.getElementById(buttonId);
        if (button) {
            if (isActive) {
                button.classList.add('bg-green-100');
                button.classList.remove('bg-gray-100');
            } else {
                button.classList.remove('bg-green-100');
                button.classList.add('bg-gray-100');
            }
        }
    }

    // Reset all tool states
    resetStates() {
        this.isDrawing = false;
        this.isPanning = false;
        this.isDraggingElement = false;
        this.isRotatingElement = false;
        this.draggedElement = null;
        this.rotatedElement = null;
    }
}