/*
Deva Diy
ESP Web Server ควบคุมความสว่างหลอด LED 
ด้วยสัญญาณ PWM 
*/
#include <WiFi.h>
#include <AsyncTCP.h>
#include <ESPAsyncWebServer.h>
#include "index.h"
#include "style.h"

// สร้าง AsyncWebServer object พอร์ต 80
AsyncWebServer server(80);


//ตัวแปรบันทึกค่า ssid รหัสผ่าน
const char* ssid = "your ssid";
const char* password = "your password";

String valueSlider = "0";

const int Pin = 4;

// setting PWM properties
const int freq = 5000;
const int ledChannel = 0;
const int resolution = 8;

void WiFi_init() {
  unsigned long pastTime = 0;
  unsigned long nowTime = 0;
  unsigned long timeOut = 10000;

  // ตั้งค่า esp32 WiFi Mode : Station
  WiFi.mode(WIFI_STA);
  // เชื่อมต่อเครื่อข่าย WiFi ด้วย ssid, password
  WiFi.begin(ssid, password);

  // ตรวจสอบการเชื่อมต่อ WiFi ถ้าใช้เวลาเชื่อมต่อเกิน timeOut ให้หยุดการเชื่อมต่อ
  pastTime = millis();
  while ((WiFi.status() != WL_CONNECTED) && (nowTime <= timeOut )) {
    Serial.print("Connecting to "); Serial.println(ssid);
    delay(500);
    nowTime = millis() - pastTime;
  }
  if (WiFi.status() == WL_CONNECTED) {
    Serial.print("Local ESP32 IP: ");
    Serial.println(WiFi.localIP());
    Serial.print("RSSI: ");
    Serial.println(WiFi.RSSI());
  }
  else {
    Serial.print("Unable connect to Wi-Fi " + String(ssid));
    WiFi.disconnect();
  }
}


// Replaces placeholder with values of slider
String processor(const String& var) {
  if (var == "VALUE_INPUT1") {
    return valueSlider;
  }
  return String();
}


void setup() {
  Serial.begin(115200);

  WiFi_init();

  // configure LED PWM functionalitites
  ledcSetup(ledChannel, freq, resolution); 
  ledcAttachPin(Pin, ledChannel);
  
  ledcWrite(ledChannel, valueSlider.toInt());

  // Route for root / web page
  server.on("/", HTTP_GET, &#91;&#93;(AsyncWebServerRequest * request) {
    request->send_P(200, "text/html", index_html, processor);
  });
  server.on("/style.css", HTTP_GET, [](AsyncWebServerRequest * request) {
    request->send_P(200, "text/css", style_css);
  });
  
  // Send a GET request to <ESP_IP>/slider?value=
  server.on("/slider", HTTP_GET, [] (AsyncWebServerRequest *request) {
    String inputGET;
    // GET input1 value on <ESP_IP>/slider?value=<inputMessage>
    if (request->hasParam("value")) {
      inputGET = request->getParam("value")->value();
      valueSlider = inputGET;
      ledcWrite(ledChannel, valueSlider.toInt());
    }
    else {
      inputGET = "No Parameter!";
    }
    request->send(200, "text/plain", "Set up successfully");
    delay(1000);
    Serial.println(inputGET);
  });
  // Start server
  server.begin();
}

void loop() {
  

}