#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
#include <SoftwareSerial.h>

// ---------- Wi-Fi ----------
const char* WIFI_SSID = "YOUR_WIFI_NAME";
const char* WIFI_PASS = "YOUR_WIFI_PASSWORD";

// ---------- Pins ----------
#define PIR_PIN D5

// D6 = RX of ESP8266  <-- TX/IO0 of DY-SV17F
// D7 = TX of ESP8266  --> RX/IO1 of DY-SV17F
#define PLAYER_RX D6
#define PLAYER_TX D7

SoftwareSerial playerSerial(PLAYER_RX, PLAYER_TX);
ESP8266WebServer server(80);

// ---------- Settings ----------
bool alarmEnabled = true;
uint16_t selectedTrack = 1;

bool lastPirState = LOW;
unsigned long lastTrigger = 0;
const unsigned long triggerLockout = 5000;

// ---------- DY-SV17F UART ----------
void sendPlayerCommand(uint8_t command) {
  uint8_t packet[] = {0xAA, command, 0x00, 0x00};

  // For commands without data:
  // checksum = sum of AA + CMD + LEN
  uint8_t checksum = 0xAA + command + 0x00;

  playerSerial.write(0xAA);
  playerSerial.write(command);
  playerSerial.write(0x00);
  playerSerial.write(checksum);
  playerSerial.flush();
}

void playTrack(uint16_t track) {
  if (track == 0) track = 1;

  uint8_t highByte = (track >> 8) & 0xFF;
  uint8_t lowByte  = track & 0xFF;

  uint8_t checksum =
      0xAA + 0x07 + 0x02 + highByte + lowByte;

  playerSerial.write(0xAA);
  playerSerial.write(0x07);
  playerSerial.write(0x02);
  playerSerial.write(highByte);
  playerSerial.write(lowByte);
  playerSerial.write(checksum);
  playerSerial.flush();
}

void stopPlayer() {
  // DY-SV17F STOP command: AA 04 00 AE
  playerSerial.write(0xAA);
  playerSerial.write(0x04);
  playerSerial.write(0x00);
  playerSerial.write(0xAE);
  playerSerial.flush();
}

// ---------- Web page ----------
String makePage() {
  String html;
  html.reserve(5000);

  html += F(R"rawliteral(










دزدگیر سخنگو
وضعیت: )rawliteral");

  html += alarmEnabled ? F("فعال") : F("غیرفعال");

  html += F(R"rawliteral(


فعال
غیرفعال



فایل هشدار:
)rawliteral");

  for (int i = 1; i <= 10; i++) {
    html += F("فایل ");
    html += i;
    html += F(" - 0000");
    html += i;
    html += F(".mp3");
  }

  html += F(R"rawliteral(

ذخیره فایل



▶ پخش
■ توقف




)rawliteral");

  return html;
}

// ---------- Web handlers ----------
void handleRoot() {
  server.send(200, "text/html; charset=utf-8", makePage());
}

void handleAlarm() {
  if (server.hasArg("state")) {
    alarmEnabled = server.arg("state") == "on";
  }
  server.sendHeader("Location", "/");
  server.send(303);
}

void handleTrack() {
  if (server.hasArg("n")) {
    int n = server.arg("n").toInt();
    if (n >= 1 && n <= 10) selectedTrack = n;
  }
  server.sendHeader("Location", "/");
  server.send(303);
}

void handlePlay() {
  playTrack(selectedTrack);
  server.sendHeader("Location", "/");
  server.send(303);
}

void handleStop() {
  stopPlayer();
  server.sendHeader("Location", "/");
  server.send(303);
}

// ---------- Setup ----------
void setup() {
  pinMode(PIR_PIN, INPUT);

  Serial.begin(115200);
  playerSerial.begin(9600);

  delay(300);

  WiFi.mode(WIFI_STA);
  WiFi.begin(WIFI_SSID, WIFI_PASS);

  while (WiFi.status() != WL_CONNECTED) {
    delay(300);
  }

  server.on("/", handleRoot);
  server.on("/alarm", handleAlarm);
  server.on("/track", handleTrack);
  server.on("/play", handlePlay);
  server.on("/stop", handleStop);

  server.begin();

  Serial.println();
  Serial.print("Web Server: http://");
  Serial.println(WiFi.localIP());
}

// ---------- Loop ----------
void loop() {
  server.handleClient();

  bool pirState = digitalRead(PIR_PIN);

  // Rising edge: LOW -> HIGH
  if (alarmEnabled &&
      pirState == HIGH &&
      lastPirState == LOW &&
      millis() - lastTrigger > triggerLockout) {

    playTrack(selectedTrack);
    lastTrigger = millis();
  }

  lastPirState = pirState;
}