/**
 * @file LEDIndicator.cpp
 * @brief Implementation of LED status indicators
 */

#include "LEDIndicator.h"

/**
 * @brief Constructor - initialize with default state
 */
LEDIndicator::LEDIndicator() : 
    powerOn(false), 
    dccMode(false), 
    brightness(128),
    lastUpdate(0),
    pulsePhase(0) {
}

void LEDIndicator::begin() {
    FastLED.addLeds<WS2812, LED_DATA_PIN, GRB>(leds, NUM_LEDS);
    FastLED.setBrightness(brightness);
    
    // Initialize both LEDs to off
    leds[LED_POWER] = COLOR_OFF;
    leds[LED_MODE] = COLOR_OFF;
    FastLED.show();
    
    Serial.println("LED Indicator initialized");
    Serial.printf("LED Data Pin: %d, Num LEDs: %d\n", LED_DATA_PIN, NUM_LEDS);
}

void LEDIndicator::update() {
    unsigned long now = millis();
    
    // Update power LED
    if (powerOn) {
        leds[LED_POWER] = COLOR_POWER_ON;
    } else {
        leds[LED_POWER] = COLOR_POWER_OFF;
    }
    
    // Update mode LED with subtle pulsing effect
    if (now - lastUpdate > 20) {
        lastUpdate = now;
        pulsePhase++;
        
        // Create gentle pulse effect
        uint8_t pulseBrightness = 128 + (sin8(pulsePhase * 2) / 4);
        
        CRGB baseColor = dccMode ? COLOR_DCC : COLOR_ANALOG;
        leds[LED_MODE] = baseColor;
        leds[LED_MODE].fadeToBlackBy(255 - pulseBrightness);
    }
    
    FastLED.show();
}

void LEDIndicator::setPowerOn(bool on) {
    if (powerOn != on) {
        powerOn = on;
        if (on) {
            powerOnSequence();
        }
    }
}

void LEDIndicator::setMode(bool isDCC) {
    if (dccMode != isDCC) {
        dccMode = isDCC;
        modeChangeEffect();
    }
}

void LEDIndicator::setBrightness(uint8_t newBrightness) {
    brightness = newBrightness;
    FastLED.setBrightness(brightness);
}

void LEDIndicator::powerOnSequence() {
    // Quick flash sequence on power on
    for (int i = 0; i < 3; i++) {
        leds[LED_POWER] = COLOR_POWER_ON;
        FastLED.show();
        delay(100);
        leds[LED_POWER] = COLOR_OFF;
        FastLED.show();
        delay(100);
    }
    leds[LED_POWER] = COLOR_POWER_ON;
    FastLED.show();
    Serial.println("LED: Power ON sequence");
}

void LEDIndicator::modeChangeEffect() {
    // Smooth transition effect when changing modes
    CRGB targetColor = dccMode ? COLOR_DCC : COLOR_ANALOG;
    
    // Fade out
    for (int i = 255; i >= 0; i -= 15) {
        leds[LED_MODE].fadeToBlackBy(15);
        FastLED.show();
        delay(10);
    }
    
    // Fade in new color
    for (int i = 0; i <= 255; i += 15) {
        leds[LED_MODE] = targetColor;
        leds[LED_MODE].fadeToBlackBy(255 - i);
        FastLED.show();
        delay(10);
    }
    
    Serial.printf("LED: Mode changed to %s\n", dccMode ? "DCC (Blue)" : "Analog (Yellow)");
}