/*********************************************************************
 * ESP32 WiFi LED Controller
 * 
 * Control RGB LED strip via WiFi and web browser
 * Hardware: ESP32, WS2812B LED Strip
 * 
 * Libraries Required:
 * - FastLED (install from Library Manager)
 *********************************************************************/

#include 
#include 
#include 

// ============== LED CONFIGURATION ==============
#define LED_PIN 4
#define NUM_LEDS 60

CRGB leds[NUM_LEDS];

// ============== WIFI ==============
const char* wifi_ssid = "YOUR_WIFI";
const char* wifi_password = "YOUR_PASSWORD";

WebServer server(80);

// ============== STATE ==============
int currentMode = 0;
int brightness = 100;
CRGB currentColor = CRGB::White;

void setup() {
  Serial.begin(115200);
  
  // Initialize LEDs
  FastLED.addLeds(leds, NUM_LEDS);
  FastLED.setBrightness(brightness);
  
  // Set all LEDs to current color
  fill_solid(leds, NUM_LEDS, currentColor);
  FastLED.show();
  
  connectToWiFi();
  setupWebServer();
  
  Serial.println(F("LED Controller Active!"));
}

void loop() {
  server.handleClient();
  
  // Update LEDs based on mode
  updateLEDs();
}

// ============== FUNCTIONS ==============

void updateLEDs() {
  switch (currentMode) {
    case 0:  // Static color
      fill_solid(leds, NUM_LEDS, currentColor);
      break;
    case 1:  // Rainbow
      for (int i = 0; i < NUM_LEDS; i++) {
        leds[i] = CHSV((i * 256 / NUM_LEDS + millis()/10) % 256, 255, 255);
      }
      break;
    case 2:  // Breathing
      float breath = (sin(millis() / 500.0) + 1) / 2;
      fill_solid(leds, NUM_LEDS, currentColor);
      FastLED.setBrightness(brightness * breath);
      break;
  }
  FastLED.show();
}

void setupWebServer() {
  server.on("/", []() {
    String html = ""
      "
ESP32 LED Controller
"
      "
Brightness: " + String(brightness) + "
"
      ""
      "

"
      "Solid"
      "Rainbow"
      "Breathing"
      "

"
      ""
      ""
      ""
      ""
      ""
      ""
      "";
    server.send(200, "text/html", html);
  });
  
  server.on("/mode", []() {
    currentMode = server.arg("m").toInt();
    server.send(200, "text/plain", "OK");
  });
  
  server.on("/color", []() {
    currentColor = CRGB(
      server.arg("r").toInt(),
      server.arg("g").toInt(),
      server.arg("b").toInt()
    );
    server.send(200, "text/plain", "OK");
  });
  
  server.on("/bright", []() {
    brightness = server.arg("b").toInt();
    FastLED.setBrightness(brightness);
    FastLED.show();
    server.send(200, "text/plain", "OK");
  });
  
  server.begin();
}

void connectToWiFi() {
  WiFi.begin(wifi_ssid, wifi_password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(F("."));
  }
  Serial.println(F(" Connected!"));
  Serial.print(F("IP: "));
  Serial.println(WiFi.localIP());
}