#include <WiFi.h>
#include <WiFiClient.h>
#include <WebServer.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include "WiFiManager.h"
#include "AsyncTCP.h"
#include "ESPAsyncWebServer.h"
#include "RTClib.h"

RTC_DS3231 rtc;  // 宣告 RTC 物件
AsyncWebServer server(80);
const int ledPin = 2;  // 定義 LED 所連接的 GPIO 引腳
LiquidCrystal_I2C lcd(0x27, 16, 2);  // I2C LCD 的地址和尺寸

void setup() {
  pinMode(ledPin, OUTPUT);
  Wire.begin();
  lcd.init();          // 初始化 LCD
  lcd.backlight();     // 開啟背光

  // 初始化 WiFiManager，用於設定 Wi-Fi
  WiFiManager wifiManager;
  wifiManager.autoConnect("ESP32AP", "password");

  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request){
    request->send(200, "text/html", "<h1>ESP32 LED Control</h1><a href=\"/on\">開啟 LED</a><br><a href=\"/off\">關閉 LED</a>");
  });

  server.on("/on", HTTP_GET, [](AsyncWebServerRequest *request){
    digitalWrite(ledPin, HIGH);
    request->send(200, "text/plain", "LED 開啟");
  });

  server.on("/off", HTTP_GET, [](AsyncWebServerRequest *request){
    digitalWrite(ledPin, LOW);
    request->send(200, "text/plain", "LED 關閉");
  });

  server.begin();
}

void loop() {
  // 獲取當前時間
  DateTime now = rtc.now();

  // 更新 LCD 顯示當前時間和 LED 狀態
  lcd.setCursor(0, 0);
  lcd.print("Time: ");
  lcd.print(now.hour());
  lcd.print(":");
  if (now.minute() < 10) {
    lcd.print("0");
  }
  lcd.print(now.minute());
  lcd.setCursor(0, 1);
  lcd.print("LED: ");
  if (digitalRead(ledPin) == HIGH) {
    lcd.print("ON ");
  } else {
    lcd.print("OFF");
  }

  // 如果當前時間在特定時間範圍內，開啟 LED
  if ((now.hour() == 10 && now.minute() == 0) || (now.hour() == 15 && now.minute() == 30)) {
    digitalWrite(ledPin, HIGH);
  } else {
    digitalWrite(ledPin, LOW);
  }

  delay(1000); // 避免過度使用 CPU 資源
}