#include "WiFi.h"
#include "DHT.h"

// WIFI 信息（Wokwi 仿真专用，你不用改）
const char* ssid = "WokwiWiFi";
const char* password = "wokwi123";

// DHT11
#define DHTPIN 4
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);

// 继电器引脚
#define FAN_PIN 18
#define HUMIDIFIER_PIN 19

WiFiServer server(80);

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

  pinMode(FAN_PIN, OUTPUT);
  pinMode(HUMIDIFIER_PIN, OUTPUT);
  digitalWrite(FAN_PIN, LOW);
  digitalWrite(HUMIDIFIER_PIN, LOW);

  dht.begin();

  // 连接 WiFi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  server.begin();
}

void loop() {
  WiFiClient client = server.available();
  if (!client) return;

  String request = client.readStringUntil('\r');
  client.flush();

  // 读取温湿度
  float h = dht.readHumidity();
  float t = dht.readTemperature();
  int pm25 = random(10, 60); // 模拟 PM2.5

  // 控制指令
  if (request.indexOf("FAN_ON") != -1) digitalWrite(FAN_PIN, HIGH);
  if (request.indexOf("FAN_OFF") != -1) digitalWrite(FAN_PIN, LOW);
  if (request.indexOf("HUMI_ON") != -1) digitalWrite(HUMIDIFIER_PIN, HIGH);
  if (request.indexOf("HUMI_OFF") != -1) digitalWrite(HUMIDIFIER_PIN, LOW);

  // 返回网页
  client.println("HTTP/1.1 200 OK");
  client.println("Content-Type:text/html");
  client.println();
  client.println("<h1>智能助眠净化系统</h1>");
  client.print("温度："); client.print(t); client.println("℃<br>");
  client.print("湿度："); client.print(h); client.println("%<br>");
  client.print("PM2.5："); client.print(pm25); client.println("<br><br>");

  client.println("<a href= "/FAN_ON\">开启净化</a > | <a href=\"/FAN_OFF\">关闭净化</a ><br>");
  client.println("<a href=\"/HUMI_ON\">开启加湿</a > | <a href=\"/HUMI_OFF\">关闭加湿</a >");

  delay(10);
}