#include <WiFi.h>
#include <ESPAsyncWebServer.h>
#include <SPIFFS.h>
#include <LTR308.h>
#include <Wire.h>

LTR308 light;
unsigned char ID;
// Replace with your network credentials
const char* ssid = "REPLACE_WITH_YOUR_SSID";
const char* password = "REPLACE_WITH_YOUR_PASSWORD";

// Create AsyncWebServer object on port 80
AsyncWebServer server(80);

void initLight(){
  light.begin();
  // To start taking measurements, power up the sensor
  
  light.setPowerUp();

  // Allow for a slight delay in power-up sequence (typ. 5ms from the datasheet)
  delay(10);
  light.setGain(0);
  light.setMeasurementRate(0, 3);
  }

String readLight(){
  unsigned long rawData;
  double lux;    // Resulting lux value
  boolean good;  // True if sensor is not saturated
    
  light.getData(rawData);
  good = light.getLux(0, 0, rawData, lux);
  if(good) 
    return String(lux);
  else { 
    Serial.println("Failed to read light sensor!");
    return "-1";
  }
 }


void setup(){
  // Serial port for debugging purposes
  Serial.begin(115200);
  
  light.begin();
  if (light.getPartID(ID)) {
    Serial.print("Got Sensor Part ID: 0X");
    Serial.print(ID, HEX);
    Serial.println();
  }
  else {
    Serial.println("Could not initialize LTR308 sensor");
    while(1);
  }
  initLight();
  
  // Initialize SPIFFS
  if(!SPIFFS.begin()){
    Serial.println("An Error has occurred while mounting SPIFFS");
    return;
  }

  // Connect to Wi-Fi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi..");
  }

  // Print ESP32 Local IP Address
  Serial.println(WiFi.localIP());

  // Route for root / web page
  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request){
    request->send(SPIFFS, "/index.html");
  });
  server.on("/light", HTTP_GET, [](AsyncWebServerRequest *request){
    request->send_P(200, "text/plain", readLight().c_str());
  });

  // Start server
  server.begin();
}
 
void loop(){
  
}