#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#include <WiFi.h>
#include <HTTPClient.h>
#include <ArduinoJson.h>

const char* ssid = "Wokwi-GUEST";
const char* password = "";

const String JSON = "http://localhost:5000/";

#define BTN_0 18
#define STATE_LED 19
#define RELAY_0 26
#define RELAY_1 27

uint16_t RELAY0_WAIT,RELAY0_RUN,RELAY0_SLEEP;
uint16_t RELAY1_WAIT,RELAY1_RUN,RELAY1_SLEEP;

// 初始化OLED显示屏对象，设置分辨率为128x64
Adafruit_SSD1306 display = Adafruit_SSD1306(128, 64, &Wire);

String GetJson(){
  /*
  HTTPClient http;
  http.useHTTP10(true);
  http.begin(JSON);
  http.GET();
  String result = http.getString();

  DynamicJsonDocument doc(2048);
  DeserializationError error = deserializeJson(doc, result);

  // Test if parsing succeeds.
  if (error) {
    Serial.print("deserializeJson() failed: ");
    Serial.println(error.c_str());
    return "<error>";
  }
  */

  //假装有个json
  DynamicJsonDocument doc(2048);
  String result="{\"RELAY0\":{\"WAIT\":1000,\"RUN\":1000,\"SLEEP\":1000},\"RELAY1\":{\"WAIT\":1000,\"\RUN\":1000,\"SLEEP\":1000}}";
  DeserializationError error = deserializeJson(doc, result);
  // Test if parsing succeeds.
  if (error) {
    Serial.print("deserializeJson() failed: ");
    Serial.println(error.c_str());
    return "<error>";
  }
  

  RELAY0_WAIT = doc["RELAY0"]["WAIT"].as<uint16_t>();
  RELAY0_RUN = doc["RELAY0"]["RUN"].as<uint16_t>();
  RELAY0_SLEEP = doc["RELAY0"]["SLEEP"].as<uint16_t>();

  RELAY1_WAIT = doc["RELAY1"]["WAIT"].as<uint16_t>();
  RELAY1_RUN = doc["RELAY1"]["RUN"].as<uint16_t>();
  RELAY1_SLEEP = doc["RELAY1"]["SLEEP"].as<uint16_t>();

  //http.end();
  return "<done>";
}

void run(){
  
  display.clearDisplay();
  display.setCursor(0, 0);
  display.println("RUNING");
  display.display();
  
  delay(RELAY0_WAIT);
  analogWrite(RELAY_0,HIGH);
  delay(RELAY0_RUN);
  analogWrite(RELAY_0,LOW);

  delay(RELAY1_WAIT);
  analogWrite(RELAY_1,HIGH);
  delay(RELAY1_RUN);
  analogWrite(RELAY_1,LOW);

  display.clearDisplay();
  display.setCursor(0, 0);
  display.println("STOP");
  display.display();

}

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  pinMode(BTN_0, INPUT_PULLUP);
  pinMode(STATE_LED, OUTPUT);

  WiFi.begin(ssid, password, 6);

  // 初始化OLED显示屏
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.clearDisplay();

  // 显示文本 Circle:
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);

  display.print("Connecting to WiFi...");
  display.display();

  while (WiFi.status() != WL_CONNECTED) {
    digitalWrite(STATE_LED, HIGH);
    delay(500);
    digitalWrite(STATE_LED, LOW);
    delay(500);
    //display.print(".");
  }
  display.clearDisplay();
  display.setCursor(0, 0);
  display.print("OK! IP=");
  display.println(WiFi.localIP());

  // 更新显示内容
  display.display();


  display.clearDisplay();
  display.setCursor(0, 0);
  display.print(GetJson());
  // 更新显示内容
  display.display();

}

void loop() {
  // put your main code here, to run repeatedly:
  display.clearDisplay();
  display.setCursor(0, 0);
  delay(100);
  display.println(String("RELAY0_WAIT :  %d",RELAY0_WAIT));
  display.println(String("RELAY0_RUN  :  %d",RELAY0_RUN));
  display.println(String("RELAY0_SLEEP:  %d",RELAY0_SLEEP));

  display.println(String("RELAY1_WAIT :  %d",RELAY1_WAIT));
  display.println(String("RELAY1_RUN  :  %d",RELAY1_RUN));
  display.println(String("RELAY1_SLEEP:  %d",RELAY1_SLEEP));

  display.display();
  if (digitalRead(BTN_0)==LOW)
  {
    delay(100);
    if (digitalRead(BTN_0)==HIGH)
    {
      run();
    }
  }
}