// Shared JavaScript for GeoScatter 3D Application

// DOM Elements
let canvasContainer;
let loadingOverlay;
let modelSelectBtn;
let modelDropdown;
let resetViewBtn;
let toggleGridBtn;
let rayCountSlider;
let rayValueSpan;
let visualizeRaysCheckbox;
let densityButtons;
let modeRadios;
let startSamplingBtn;
let clearRaysBtn;
let zoomInBtn;
let zoomOutBtn;
let activeRaysSpan;

// Sample Distribution Data (mock data)
const sampleData = {
    sphere: [65, 42, 38, 28, 17],
    cylinder: [42, 56, 45, 32, 15],
    organic: [38, 52, 48, 41, 22],
    torus: [28, 46, 52, 47, 31]
};

// Current Selected Model
let currentModel = 'sphere';

// Initialize when DOM is loaded
document.addEventListener('DOMContentLoaded', function() {
    // Get DOM Elements
    canvasContainer = document.getElementById('canvasContainer');
    loadingOverlay = document.getElementById('loadingOverlay');
    modelSelectBtn = document.getElementById('modelSelectBtn');
    modelDropdown = document.getElementById('modelDropdown');
    resetViewBtn = document.getElementById('resetView');
    toggleGridBtn = document.getElementById('toggleGrid');
    rayCountSlider = document.getElementById('rayCount');
    rayValueSpan = document.getElementById('rayValue');
    visualizeRaysCheckbox = document.getElementById('visualizeRays');
    densityButtons = document.querySelectorAll('.density-btn');
    modeRadios = document.querySelectorAll('input[name="mode"]');
    startSamplingBtn = document.getElementById('startSampling');
    clearRaysBtn = document.getElementById('clearRays');
    zoomInBtn = document.getElementById('zoomIn');
    zoomOutBtn = document.getElementById('zoomOut');
    activeRaysSpan = document.getElementById('activeRays');
    
    // Get coordinate display elements
    const coordX = document.getElementById('coordX');
    const coordY = document.getElementById('coordY');
    const coordZ = document.getElementById('coordZ');
    
    // Model Selection Logic
    const modelOptions = document.querySelectorAll('.model-option');
    modelOptions.forEach(option => {
        option.addEventListener('click', function() {
            const model = this.getAttribute('data-model');
            selectModel(model);
            
            // Close dropdown
            modelDropdown.style.display = 'none';
            
            // Update UI
            this.classList.add('bg-primary', 'text-white');
            this.classList.remove('hover:bg-gray-700');
            modelOptions.forEach(opt => {
                if (opt !== this) {
                    opt.classList.remove('bg-primary', 'text-white');
                    opt.classList.add('hover:bg-gray-700');
                }
            });
        });
    });
    
    // Toggle model dropdown
    if (modelSelectBtn) {
        modelSelectBtn.addEventListener('click', function() {
            modelDropdown.style.display = modelDropdown.style.display === 'block' ? 'none' : 'block';
        });
    }
    
    // Ray Count Slider
    if (rayCountSlider) {
        rayCountSlider.addEventListener('input', function() {
            const value = this.value;
            if (rayValueSpan) {
                rayValueSpan.textContent = value;
            }
            if (activeRaysSpan) {
                activeRaysSpan.textContent = value;
            }
            
            // Update visualization in scene (simulate)
            if (window.sceneManager) {
                window.sceneManager.updateRayCount(value);
            }
        });
    }
    
    // Density Buttons
    if (densityButtons) {
        densityButtons.forEach(btn => {
            btn.addEventListener('click', function() {
                const density = this.getAttribute('data-density');
                selectDensity(density);
                
                // Update UI
                densityButtons.forEach(b => {
                    b.classList.remove('bg-primary', 'text-white');
                    b.classList.add('bg-gray-100', 'dark:bg-gray-800', 'hover:bg-gray-200', 'dark:hover:bg-gray-700');
                });
                this.classList.add('bg-primary', 'text-white');
                this.classList.remove('hover:bg-gray-200', 'dark:hover:bg-gray-700');
            });
        });
    }
    
    // Algorithm Mode Selection
    if (modeRadios) {
        modeRadios.forEach(radio => {
            radio.addEventListener('change', function() {
                selectMode(this.value);
            });
        });
    }
    
    // Start Sampling Button
    if (startSamplingBtn) {
        startSamplingBtn.addEventListener('click', function() {
            startSampling();
        });
    }
    
    // Clear Rays Button
    if (clearRaysBtn) {
        clearRaysBtn.addEventListener('click', function() {
            clearRays();
        });
    }
    
    // Toggle Grid Button
    if (toggleGridBtn) {
        toggleGridBtn.addEventListener('click', function() {
            toggleGridVisibility();
        });
    }
    
    // Reset View Button
    if (resetViewBtn) {
        resetViewBtn.addEventListener('click', function() {
            resetCameraView();
        });
    }
    
    // Zoom Controls
    if (zoomInBtn) {
        zoomInBtn.addEventListener('click', function() {
            zoomCamera('in');
        });
    }
    
    if (zoomOutBtn) {
        zoomOutBtn.addEventListener('click', function() {
            zoomCamera('out');
        });
    }
    
    // Visualize Rays Checkbox
    if (visualizeRaysCheckbox) {
        visualizeRaysCheckbox.addEventListener('change', function() {
            toggleRayVisualization(this.checked);
        });
    }
    
    // Update sample chart based on model
    updateSampleChart(currentModel);
    
    // Hide loading overlay after 2 seconds (simulate loading)
    setTimeout(() => {
        if (loadingOverlay) {
            loadingOverlay.style.opacity = '0';
            setTimeout(() => {
                loadingOverlay.style.display = 'none';
            }, 300);
        }
    }, 1500);
    
    // Update coordinates display (simulate 3D interaction)
    if (coordX && coordY && coordZ) {
        simulateCameraMovement(coordX, coordY, coordZ);
    }
    
    // Event Listeners for Ray Visualization
    document.addEventListener('rayCreated', function(e) {
        if (e.detail && e.detail.count) {
            updateRayStats(e.detail.count);
        }
    });
});

// Model Selection Function
function selectModel(model) {
    currentModel = model;
    console.log(`Selected model: ${model}`);
    
    // Update UI
    const modelIcon = document.querySelector('#modelSelectBtn i');
    if (modelIcon) {
        modelIcon.setAttribute('data-feather', getModelIcon(model));
        feather.replace();
    }
    
    // Update sample chart
    updateSampleChart(model);
    
    // Update Three.js scene
    if (window.sceneManager) {
        window.sceneManager.changeModel(model);
    }
    
    // Dispatch event
    const event = new CustomEvent('modelChanged', { detail: { model: model } });
    document.dispatchEvent(event);
}

// Get icon name based on model
function getModelIcon(model) {
    const icons = {
        sphere: 'circle',
        cylinder: 'square',
        organic: 'hexagon',
        torus: 'triangle'
    };
    return icons[model] || 'circle';
}

// Density Selection Function
function selectDensity(density) {
    console.log(`Selected density: ${density}`);
    
    // Update UI
    const densityValueSpan = document.getElementById('densityValue');
    if (densityValueSpan) {
        densityValueSpan.textContent = density.charAt(0).toUpperCase() + density.slice(1);
    }
    
    // Dispatch event
    const event = new CustomEvent('densityChanged', { detail: { density: density } });
    document.dispatchEvent(event);
}

// Mode Selection Function
function selectMode(mode) {
    console.log(`Selected mode: ${mode}`);
    
    // Dispatch event
    const event = new CustomEvent('modeChanged', { detail: { mode: mode } });
    document.dispatchEvent(event);
}

// Start Sampling Function
function startSampling() {
    console.log('Starting outside-in ray sampling...');
    
    // Show visual feedback
    if (startSamplingBtn) {
        startSamplingBtn.innerHTML = '<i data-feather="loader" class="w-4 h-4 mr-2 animate-spin"></i>Sampling...';
        feather.replace();
        
        setTimeout(() => {
            startSamplingBtn.innerHTML = '<i data-feather="check" class="w-4 h-4 mr-2"></i>Sampling Complete';
            feather.replace();
        }, 2000);
    }
    
    // Dispatch event
    const event = new CustomEvent('samplingStarted');
    document.dispatchEvent(event);
}

// Clear Rays Function
function clearRays() {
    console.log('Clearing all ray visualizations...');
    
    // Dispatch event
    const event = new CustomEvent('raysCleared');
    document.dispatchEvent(event);
}

// Grid Visibility Toggle
function toggleGridVisibility() {
    console.log('Toggling grid visibility...');
    
    // Dispatch event
    const event = new CustomEvent('gridToggled');
    document.dispatchEvent(event);
}

// Camera Reset Function
function resetCameraView() {
    console.log('Resetting camera view...');
    
    // Dispatch event
    const event = new CustomEvent('cameraReset');
    document.dispatchEvent(event);
}

// Camera Zoom Function
function zoomCamera(direction) {
    console.log(`Zooming camera ${direction}...`);
    
    // Dispatch event
    const event = new CustomEvent('cameraZoomed', { detail: { direction: direction } });
    document.dispatchEvent(event);
}

// Ray Visualization Toggle
function toggleRayVisualization(visible) {
    console.log(`Ray visualization ${visible ? 'enabled' : 'disabled'}`);
    
    // Dispatch event
    const event = new CustomEvent('rayVisualizationToggled', { detail: { visible: visible } });
    document.dispatchEvent(event);
}

// Update Sample Chart Function
function updateSampleChart(model) {
    if (window.updateSampleChart) {
        window.updateSampleChart(model);
    }
}

// Simulate Camera Movement for Coordinates Display
function simulateCameraMovement(coordX, coordY, coordZ) {
    let x = 0, y = 0, z = 0;
    let increment = 0.01;
    
    function updateCoordinates() {
        x += (Math.random() - 0.5) * increment;
        y += (Math.random() - 0.5) * increment;
        z += (Math.random() - 0.5) * increment;
        
        // Apply some damping
        x *= 0.99;
        y *= 0.99;
        z *= 0.99;
        
        if (coordX) coordX.textContent = x.toFixed(2);
        if (coordY) coordY.textContent = y.toFixed(2);
        if (coordZ) coordZ.textContent = z.toFixed(2);
        
        requestAnimationFrame(updateCoordinates);
    }
    
    updateCoordinates();
}

// Update Ray Statistics
function updateRayStats(count) {
    const totalSamples = document.getElementById('totalSamples');
    const rayCollisions = document.getElementById('rayCollisions');
    const shellAccuracy = document.getElementById('shellAccuracy');
    const avgDistance = document.getElementById('avgDistance');
    
    if (totalSamples) {
        totalSamples.textContent = count * 4;
    }
    
    if (rayCollisions) {
        const collisions = Math.floor(count * 3.8);
        rayCollisions.textContent = collisions;
    }
    
    if (shellAccuracy) {
        const accuracy = 90 + Math.floor(Math.random() * 10);
        shellAccuracy.textContent = `${accuracy}.${Math.floor(Math.random() * 10)}%`;
    }
    
    if (avgDistance) {
        const distance = 0.8 + Math.random() * 0.4;
        avgDistance.textContent = `${distance.toFixed(2)}m`;
    }
}

// Add event listeners for custom events
document.addEventListener('modelChanged', function(e) {
    console.log(`Model changed to: ${e.detail.model}`);
});

document.addEventListener('densityChanged', function(e) {
    console.log(`Density changed to: ${e.detail.density}`);
});

document.addEventListener('modeChanged', function(e) {
    console.log(`Mode changed to: ${e.detail.mode}`);
});

document.addEventListener('samplingStarted', function() {
    console.log('Sampling process started.');
});

document.addEventListener('raysCleared', function() {
    console.log('All rays cleared.');
});

document.addEventListener('gridToggled', function() {
    console.log('Grid toggled.');
});

document.addEventListener('cameraReset', function() {
    console.log('Camera view reset.');
});

document.addEventListener('cameraZoomed', function(e) {
    console.log(`Camera zoomed ${e.detail.direction}`);
});

document.addEventListener('rayVisualizationToggled', function(e) {
    console.log(`Ray visualization toggled: ${e.detail.visible}`);
});

// Export Functions for Use in Other Scripts
window.updateSampleChart = function(model) {
    console.log(`Sample chart updated for model: ${model}`);
    
    // Update UI elements
    const sampleChartBars = document.querySelectorAll('#sampleChart div div');
    if (sampleChartBars.length >= 5) {
        const data = sampleData[model] || sampleData.sphere;
        for (let i = 0; i < data.length; i++) {
            const height = data[i];
            if (sampleChartBars[i]) {
                sampleChartBars[i].style.height = `${height * 0.2}px`;
            }
        }
    }
};