// LED Control Page - Unified interface for WLED and DW LEDs

let ledConfig = null;

// Utility function to show status messages
function showStatus(message, type = 'info') {
    const statusDiv = document.getElementById('dw-leds-status');
    if (!statusDiv) return;

    const iconMap = {
        'success': 'check_circle',
        'error': 'error',
        'warning': 'warning',
        'info': 'info'
    };

    const colorMap = {
        'success': 'text-green-700 bg-green-50 border-green-200',
        'error': 'text-red-700 bg-red-50 border-red-200',
        'warning': 'text-amber-700 bg-amber-50 border-amber-200',
        'info': 'text-gray-700 bg-gray-100 border-slate-200'
    };

    const icon = iconMap[type] || 'info';
    const colorClass = colorMap[type] || colorMap.info;

    statusDiv.className = `p-4 rounded-lg border ${colorClass}`;
    statusDiv.innerHTML = `
        <div class="flex items-center gap-2">
            <span class="material-icons">${icon}</span>
            <span class="text-sm">${message}</span>
        </div>
    `;
}

// Initialize the page based on LED configuration
async function initializeLedPage() {
    try {
        const response = await fetch('/get_led_config');
        if (!response.ok) throw new Error('Failed to fetch LED config');

        ledConfig = await response.json();

        const notConfigured = document.getElementById('led-not-configured');
        const wledContainer = document.getElementById('wled-container');
        const dwLedsContainer = document.getElementById('dw-leds-container');

        // Hide all containers first
        notConfigured.classList.add('hidden');
        wledContainer.classList.add('hidden');
        dwLedsContainer.classList.add('hidden');

        if (ledConfig.provider === 'wled' && ledConfig.wled_ip) {
            // Show WLED iframe
            wledContainer.classList.remove('hidden');
            const wledFrame = document.getElementById('wled-frame');
            if (wledFrame) {
                wledFrame.src = `http://${ledConfig.wled_ip}`;
            }
        } else if (ledConfig.provider === 'dw_leds') {
            // Show DW LEDs controls
            dwLedsContainer.classList.remove('hidden');
            await initializeDWLedsControls();
        } else {
            // Show not configured message
            notConfigured.classList.remove('hidden');
        }
    } catch (error) {
        console.error('Error initializing LED page:', error);
        document.getElementById('led-not-configured').classList.remove('hidden');
    }
}

// Initialize DW LEDs controls
async function initializeDWLedsControls() {
    // Check status and load available effects/palettes
    await checkDWLedsStatus();
    await loadEffectsAndPalettes();

    // Power toggle button
    document.getElementById('dw-leds-power-toggle')?.addEventListener('click', async () => {
        try {
            const response = await fetch('/api/dw_leds/power', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({ state: 2 })  // Toggle
            });

            if (!response.ok) throw new Error(`HTTP ${response.status}`);
            const data = await response.json();

            if (data.connected) {
                showStatus(`Power ${data.power_on ? 'ON' : 'OFF'}`, 'success');
                await checkDWLedsStatus();
            } else {
                showStatus(data.error || 'Failed to toggle power', 'error');
            }
        } catch (error) {
            showStatus(`Failed to toggle power: ${error.message}`, 'error');
        }
    });

    // Brightness slider
    const brightnessSlider = document.getElementById('dw-leds-brightness');
    const brightnessValue = document.getElementById('dw-leds-brightness-value');

    brightnessSlider?.addEventListener('input', (e) => {
        brightnessValue.textContent = `${e.target.value}%`;
    });

    brightnessSlider?.addEventListener('change', async (e) => {
        try {
            const response = await fetch('/api/dw_leds/brightness', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({ value: parseInt(e.target.value) })
            });

            if (!response.ok) throw new Error(`HTTP ${response.status}`);
            const data = await response.json();

            if (data.connected) {
                showStatus(`Brightness set to ${e.target.value}%`, 'success');
            } else {
                showStatus(data.error || 'Failed to set brightness', 'error');
            }
        } catch (error) {
            showStatus(`Failed to set brightness: ${error.message}`, 'error');
        }
    });

    // Color picker - update display when color changes
    const colorPicker = document.getElementById('dw-leds-color');
    const colorHexDisplay = document.getElementById('dw-leds-color-hex');

    colorPicker?.addEventListener('input', (e) => {
        if (colorHexDisplay) {
            colorHexDisplay.textContent = e.target.value.toUpperCase();
        }
    });

    // Color picker - apply button
    document.getElementById('dw-leds-set-color')?.addEventListener('click', async () => {
        await applyColor(colorPicker.value);
    });

    // Quick color buttons
    document.querySelectorAll('.dw-leds-quick-color').forEach(button => {
        button.addEventListener('click', async () => {
            const hexColor = button.getAttribute('data-color');
            await applyColor(hexColor);

            // Update color picker and hex display to match
            if (colorPicker) colorPicker.value = hexColor;
            if (colorHexDisplay) colorHexDisplay.textContent = hexColor.toUpperCase();
        });
    });

    // Effect color pickers - apply immediately on change
    document.querySelectorAll('.effect-color-picker').forEach(picker => {
        picker.addEventListener('change', async () => {
            const color1 = document.getElementById('dw-leds-color1')?.value;
            const color2 = document.getElementById('dw-leds-color2')?.value;
            const color3 = document.getElementById('dw-leds-color3')?.value;

            if (color1 && color2 && color3) {
                await applyAllColors(color1, color2, color3);
            }
        });
    });

    // Effect selector
    document.getElementById('dw-leds-effect-select')?.addEventListener('change', async (e) => {
        const effectId = parseInt(e.target.value);
        if (isNaN(effectId)) return;

        try {
            const response = await fetch('/api/dw_leds/effect', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({ effect_id: effectId })
            });

            if (!response.ok) throw new Error(`HTTP ${response.status}`);
            const data = await response.json();

            if (data.connected) {
                showStatus(`Effect changed`, 'success');
                // Update power button state if backend auto-powered on
                if (data.power_on !== undefined) {
                    updatePowerButtonUI(data.power_on);
                }
            } else {
                showStatus(data.error || 'Failed to set effect', 'error');
            }
        } catch (error) {
            showStatus(`Failed to set effect: ${error.message}`, 'error');
        }
    });

    // Palette selector
    document.getElementById('dw-leds-palette-select')?.addEventListener('change', async (e) => {
        const paletteId = parseInt(e.target.value);
        if (isNaN(paletteId)) return;

        try {
            const response = await fetch('/api/dw_leds/palette', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({ palette_id: paletteId })
            });

            if (!response.ok) throw new Error(`HTTP ${response.status}`);
            const data = await response.json();

            if (data.connected) {
                showStatus(`Palette changed`, 'success');
                // Update power button state if backend auto-powered on
                if (data.power_on !== undefined) {
                    updatePowerButtonUI(data.power_on);
                }
            } else {
                showStatus(data.error || 'Failed to set palette', 'error');
            }
        } catch (error) {
            showStatus(`Failed to set palette: ${error.message}`, 'error');
        }
    });

    // Speed slider
    const speedSlider = document.getElementById('dw-leds-speed');
    const speedValue = document.getElementById('dw-leds-speed-value');

    speedSlider?.addEventListener('input', (e) => {
        speedValue.textContent = e.target.value;
    });

    speedSlider?.addEventListener('change', async (e) => {
        try {
            const response = await fetch('/api/dw_leds/speed', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({ speed: parseInt(e.target.value) })
            });

            if (!response.ok) throw new Error(`HTTP ${response.status}`);
            const data = await response.json();

            if (data.connected) {
                showStatus(`Speed updated`, 'success');
            } else {
                showStatus(data.error || 'Failed to set speed', 'error');
            }
        } catch (error) {
            showStatus(`Failed to set speed: ${error.message}`, 'error');
        }
    });

    // Intensity slider
    const intensitySlider = document.getElementById('dw-leds-intensity');
    const intensityValue = document.getElementById('dw-leds-intensity-value');

    intensitySlider?.addEventListener('input', (e) => {
        intensityValue.textContent = e.target.value;
    });

    intensitySlider?.addEventListener('change', async (e) => {
        try {
            const response = await fetch('/api/dw_leds/intensity', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({ intensity: parseInt(e.target.value) })
            });

            if (!response.ok) throw new Error(`HTTP ${response.status}`);
            const data = await response.json();

            if (data.connected) {
                showStatus(`Intensity updated`, 'success');
            } else {
                showStatus(data.error || 'Failed to set intensity', 'error');
            }
        } catch (error) {
            showStatus(`Failed to set intensity: ${error.message}`, 'error');
        }
    });

    // Save Current Idle Effect
    document.getElementById('dw-leds-save-current-idle')?.addEventListener('click', async () => {
        await saveCurrentEffectSettings('idle');
    });

    // Clear Idle Effect
    document.getElementById('dw-leds-clear-idle')?.addEventListener('click', async () => {
        await clearEffectSettings('idle');
    });

    // Save Current Playing Effect
    document.getElementById('dw-leds-save-current-playing')?.addEventListener('click', async () => {
        await saveCurrentEffectSettings('playing');
    });

    // Clear Playing Effect
    document.getElementById('dw-leds-clear-playing')?.addEventListener('click', async () => {
        await clearEffectSettings('playing');
    });

    // Load and display saved effect settings
    await loadEffectSettings();
}

// Save current LED settings as idle or playing effect
async function saveCurrentEffectSettings(type) {
    try {
        const effectId = parseInt(document.getElementById('dw-leds-effect-select')?.value) || 0;
        const paletteId = parseInt(document.getElementById('dw-leds-palette-select')?.value) || 0;
        const speed = parseInt(document.getElementById('dw-leds-speed')?.value) || 128;
        const intensity = parseInt(document.getElementById('dw-leds-intensity')?.value) || 128;

        // Get effect colors
        const color1 = document.getElementById('dw-leds-color1')?.value || '#ff0000';
        const color2 = document.getElementById('dw-leds-color2')?.value || '#000000';
        const color3 = document.getElementById('dw-leds-color3')?.value || '#0000ff';

        const settings = {
            type: type,  // 'idle' or 'playing'
            effect_id: effectId,
            palette_id: paletteId,
            speed: speed,
            intensity: intensity,
            color1: color1,
            color2: color2,
            color3: color3
        };

        const response = await fetch('/api/dw_leds/save_effect_settings', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify(settings)
        });

        if (!response.ok) throw new Error(`HTTP ${response.status}`);

        await response.json();
        showStatus(`${type.charAt(0).toUpperCase() + type.slice(1)} effect settings saved successfully`, 'success');

        // Refresh display
        await loadEffectSettings();
    } catch (error) {
        showStatus(`Failed to save ${type} effect settings: ${error.message}`, 'error');
    }
}

// Clear effect settings
async function clearEffectSettings(type) {
    try {
        const response = await fetch('/api/dw_leds/clear_effect_settings', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({ type: type })
        });

        if (!response.ok) throw new Error(`HTTP ${response.status}`);

        showStatus(`${type.charAt(0).toUpperCase() + type.slice(1)} effect cleared`, 'success');

        // Refresh display
        await loadEffectSettings();
    } catch (error) {
        showStatus(`Failed to clear ${type} effect: ${error.message}`, 'error');
    }
}

// Load and display saved effect settings
async function loadEffectSettings() {
    try {
        const response = await fetch('/api/dw_leds/get_effect_settings');
        if (!response.ok) return;

        const data = await response.json();

        // Display idle settings
        const idleDisplay = document.getElementById('idle-settings-display');
        if (idleDisplay) {
            idleDisplay.textContent = formatEffectSettings(data.idle_effect);
        }

        // Display playing settings
        const playingDisplay = document.getElementById('playing-settings-display');
        if (playingDisplay) {
            playingDisplay.textContent = formatEffectSettings(data.playing_effect);
        }
    } catch (error) {
        console.error('Failed to load effect settings:', error);
    }
}

// Format effect settings for display
function formatEffectSettings(settings) {
    if (!settings) {
        return 'Not configured (LEDs will turn off)';
    }

    const parts = [];

    // Get effect name from select (if available)
    const effectSelect = document.getElementById('dw-leds-effect-select');
    if (effectSelect && settings.effect_id !== undefined) {
        const effectOption = effectSelect.querySelector(`option[value="${settings.effect_id}"]`);
        parts.push(`Effect: ${effectOption ? effectOption.textContent : settings.effect_id}`);
    }

    // Get palette name from select (if available)
    const paletteSelect = document.getElementById('dw-leds-palette-select');
    if (paletteSelect && settings.palette_id !== undefined) {
        const paletteOption = paletteSelect.querySelector(`option[value="${settings.palette_id}"]`);
        parts.push(`Palette: ${paletteOption ? paletteOption.textContent : settings.palette_id}`);
    }

    if (settings.speed !== undefined) {
        parts.push(`Speed: ${settings.speed}`);
    }

    if (settings.intensity !== undefined) {
        parts.push(`Intensity: ${settings.intensity}`);
    }

    if (settings.color1) {
        parts.push(`Colors: ${settings.color1}, ${settings.color2 || '#000000'}, ${settings.color3 || '#0000ff'}`);
    }

    return parts.join(' | ');
}

// Helper function to apply color
async function applyColor(hexColor) {
    try {
        // Convert hex to RGB
        const r = parseInt(hexColor.slice(1, 3), 16);
        const g = parseInt(hexColor.slice(3, 5), 16);
        const b = parseInt(hexColor.slice(5, 7), 16);

        const response = await fetch('/api/dw_leds/color', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({ r, g, b })
        });

        if (!response.ok) throw new Error(`HTTP ${response.status}`);
        const data = await response.json();

        if (data.connected) {
            showStatus(`Color set to ${hexColor.toUpperCase()}`, 'success');
            // Update power button state if backend auto-powered on
            if (data.power_on !== undefined) {
                updatePowerButtonUI(data.power_on);
            }
        } else {
            showStatus(data.error || 'Failed to set color', 'error');
        }
    } catch (error) {
        showStatus(`Failed to set color: ${error.message}`, 'error');
    }
}

// Helper function to apply all effect colors
async function applyAllColors(hexColor1, hexColor2, hexColor3) {
    try {
        const payload = {};

        if (hexColor1) {
            const r = parseInt(hexColor1.slice(1, 3), 16);
            const g = parseInt(hexColor1.slice(3, 5), 16);
            const b = parseInt(hexColor1.slice(5, 7), 16);
            payload.color1 = [r, g, b];
        }

        if (hexColor2) {
            const r = parseInt(hexColor2.slice(1, 3), 16);
            const g = parseInt(hexColor2.slice(3, 5), 16);
            const b = parseInt(hexColor2.slice(5, 7), 16);
            payload.color2 = [r, g, b];
        }

        if (hexColor3) {
            const r = parseInt(hexColor3.slice(1, 3), 16);
            const g = parseInt(hexColor3.slice(3, 5), 16);
            const b = parseInt(hexColor3.slice(5, 7), 16);
            payload.color3 = [r, g, b];
        }

        const response = await fetch('/api/dw_leds/colors', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify(payload)
        });

        if (!response.ok) throw new Error(`HTTP ${response.status}`);
        const data = await response.json();

        if (data.connected) {
            showStatus(`Effect colors updated`, 'success');
        } else {
            showStatus(data.error || 'Failed to set colors', 'error');
        }
    } catch (error) {
        showStatus(`Failed to set colors: ${error.message}`, 'error');
    }
}

// Load available effects and palettes
async function loadEffectsAndPalettes() {
    try {
        // Load effects
        const effectsResponse = await fetch('/api/dw_leds/effects');
        if (effectsResponse.ok) {
            const effectsData = await effectsResponse.json();
            const effectSelect = document.getElementById('dw-leds-effect-select');
            const idleEffectSelect = document.getElementById('dw-leds-idle-effect');
            const playingEffectSelect = document.getElementById('dw-leds-playing-effect');

            if (effectSelect && effectsData.effects) {
                effectSelect.innerHTML = '';
                effectsData.effects.forEach(([id, name]) => {
                    const option = document.createElement('option');
                    option.value = id;
                    option.textContent = name;
                    effectSelect.appendChild(option);
                });
            }

            // Add effects to automation selectors
            if (idleEffectSelect && effectsData.effects) {
                idleEffectSelect.innerHTML = '<option value="off">Off</option>';
                effectsData.effects.forEach(([, name]) => {
                    const option = document.createElement('option');
                    option.value = name.toLowerCase();
                    option.textContent = name;
                    idleEffectSelect.appendChild(option);
                });
            }

            if (playingEffectSelect && effectsData.effects) {
                playingEffectSelect.innerHTML = '<option value="off">Off</option>';
                effectsData.effects.forEach(([, name]) => {
                    const option = document.createElement('option');
                    option.value = name.toLowerCase();
                    option.textContent = name;
                    playingEffectSelect.appendChild(option);
                });
            }

            // Load saved automation settings
            const configResponse = await fetch('/get_led_config');
            if (configResponse.ok) {
                const config = await configResponse.json();
                if (idleEffectSelect && config.dw_led_idle_effect) {
                    idleEffectSelect.value = config.dw_led_idle_effect;
                }
                if (playingEffectSelect && config.dw_led_playing_effect) {
                    playingEffectSelect.value = config.dw_led_playing_effect;
                }
            }
        }

        // Load palettes
        const palettesResponse = await fetch('/api/dw_leds/palettes');
        if (palettesResponse.ok) {
            const palettesData = await palettesResponse.json();
            const paletteSelect = document.getElementById('dw-leds-palette-select');

            if (paletteSelect && palettesData.palettes) {
                paletteSelect.innerHTML = '';
                palettesData.palettes.forEach(([id, name]) => {
                    const option = document.createElement('option');
                    option.value = id;
                    option.textContent = name;
                    paletteSelect.appendChild(option);
                });
            }
        }
    } catch (error) {
        console.error('Failed to load effects and palettes:', error);
        showStatus('Failed to load effects and palettes', 'error');
    }
}

// Helper function to update power button UI based on power state
function updatePowerButtonUI(powerOn) {
    const powerButton = document.getElementById('dw-leds-power-toggle');
    const powerButtonText = document.getElementById('dw-leds-power-text');

    if (powerButton && powerButtonText) {
        if (powerOn) {
            powerButton.className = 'flex items-center justify-center gap-2 rounded-lg bg-red-600 px-4 py-3 text-sm font-semibold text-white shadow-md hover:bg-red-700 transition-colors duration-150 focus:outline-none focus:ring-2 focus:ring-red-400 focus:ring-offset-2';
            powerButtonText.textContent = 'Turn OFF';
        } else {
            powerButton.className = 'flex items-center justify-center gap-2 rounded-lg bg-green-600 px-4 py-3 text-sm font-semibold text-white shadow-md hover:bg-green-700 transition-colors duration-150 focus:outline-none focus:ring-2 focus:ring-green-400 focus:ring-offset-2';
            powerButtonText.textContent = 'Turn ON';
        }
    }
}

// Check DW LEDs connection status
async function checkDWLedsStatus() {
    try {
        const response = await fetch('/api/dw_leds/status');
        if (!response.ok) throw new Error(`HTTP ${response.status}`);

        const data = await response.json();

        if (data.connected) {
            const powerState = data.power_on ? 'ON' : 'OFF';
            showStatus(`Connected: ${data.num_leds} LEDs on GPIO ${data.gpio_pin} - Power: ${powerState}`, 'success');

            // Update power button appearance
            updatePowerButtonUI(data.power_on);

            // Update slider values
            const brightnessSlider = document.getElementById('dw-leds-brightness');
            const brightnessValue = document.getElementById('dw-leds-brightness-value');
            if (brightnessSlider && data.brightness !== undefined) {
                brightnessSlider.value = data.brightness;
                if (brightnessValue) brightnessValue.textContent = `${data.brightness}%`;
            }

            const speedSlider = document.getElementById('dw-leds-speed');
            const speedValue = document.getElementById('dw-leds-speed-value');
            if (speedSlider && data.speed !== undefined) {
                speedSlider.value = data.speed;
                if (speedValue) speedValue.textContent = data.speed;
            }

            const intensitySlider = document.getElementById('dw-leds-intensity');
            const intensityValue = document.getElementById('dw-leds-intensity-value');
            if (intensitySlider && data.intensity !== undefined) {
                intensitySlider.value = data.intensity;
                if (intensityValue) intensityValue.textContent = data.intensity;
            }

            // Update effect and palette selectors
            const effectSelect = document.getElementById('dw-leds-effect-select');
            if (effectSelect && data.current_effect !== undefined) {
                effectSelect.value = data.current_effect;
            }

            const paletteSelect = document.getElementById('dw-leds-palette-select');
            if (paletteSelect && data.current_palette !== undefined) {
                paletteSelect.value = data.current_palette;
            }

            // Update color pickers if colors are provided
            if (data.colors && Array.isArray(data.colors)) {
                const color1 = document.getElementById('dw-leds-color1');
                const color2 = document.getElementById('dw-leds-color2');
                const color3 = document.getElementById('dw-leds-color3');

                if (color1 && data.colors[0]) color1.value = data.colors[0];
                if (color2 && data.colors[1]) color2.value = data.colors[1];
                if (color3 && data.colors[2]) color3.value = data.colors[2];
            }
        } else {
            // Show error message from controller
            const errorMsg = data.error || 'Connection failed';
            showStatus(errorMsg, 'error');
        }
    } catch (error) {
        showStatus(`Cannot connect to DW LEDs: ${error.message}`, 'error');
    }
}

// Initialize on page load
document.addEventListener('DOMContentLoaded', initializeLedPage);