#include <Arduino.h>
#include <WiFi.h>
#include "soc/soc.h"
#include "soc/rtc_cntl_reg.h"
#include "esp_camera.h"

// Koneksi WiFi
const char *ssid = "Arif"; 
const char *password = "sijisiji";

// Server Details
String serverName = "192.168.197.197"; 
String serverPath = "/rfidcam/WebAbsen.php";
const int serverPort = 80;

WiFiClient client;

// Konfigurasi Pin Kamera
#define PWDN_GPIO_NUM     32
#define RESET_GPIO_NUM    -1
#define XCLK_GPIO_NUM      0
#define SIOD_GPIO_NUM     26
#define SIOC_GPIO_NUM     27

#define Y9_GPIO_NUM       35
#define Y8_GPIO_NUM       34
#define Y7_GPIO_NUM       39
#define Y6_GPIO_NUM       36
#define Y5_GPIO_NUM       21
#define Y4_GPIO_NUM       19
#define Y3_GPIO_NUM       18
#define Y2_GPIO_NUM        5
#define VSYNC_GPIO_NUM    25
#define HREF_GPIO_NUM     23
#define PCLK_GPIO_NUM     22

// Konstanta dan Variabel Global
const int timerInterval = 10000;    // time between each HTTP POST image
unsigned long previousMillis = 0;   // last time image was sent
const int pinLed1 = 33; // led merah
const int pinLed2 = 4; // flash
const int Stat = 13; // pin data
  
// Fungsi Setup
void setup() {
  WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG, 0); 
  Serial.begin(115200);

  WiFi.mode(WIFI_OFF);
  delay(1000);
  WiFi.mode(WIFI_STA);

  pinMode(pinLed1, OUTPUT);
  digitalWrite(pinLed1, HIGH);

  pinMode(pinLed2, OUTPUT);
  pinMode(Stat, INPUT);
  
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);  
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    delay(500);
  }
  Serial.println();
  Serial.print("IP Address: ");
  Serial.println(WiFi.localIP());

  camera_config_t config;
  config.ledc_channel = LEDC_CHANNEL_0;
  config.ledc_timer = LEDC_TIMER_0;
  config.pin_d0 = Y2_GPIO_NUM;
  config.pin_d1 = Y3_GPIO_NUM;
  config.pin_d2 = Y4_GPIO_NUM;
  config.pin_d3 = Y5_GPIO_NUM;
  config.pin_d4 = Y6_GPIO_NUM;
  config.pin_d5 = Y7_GPIO_NUM;
  config.pin_d6 = Y8_GPIO_NUM;
  config.pin_d7 = Y9_GPIO_NUM;
  config.pin_xclk = XCLK_GPIO_NUM;
  config.pin_pclk = PCLK_GPIO_NUM;
  config.pin_vsync = VSYNC_GPIO_NUM;
  config.pin_href = HREF_GPIO_NUM;
  config.pin_sscb_sda = SIOD_GPIO_NUM;
  config.pin_sscb_scl = SIOC_GPIO_NUM;
  config.pin_pwdn = PWDN_GPIO_NUM;
  config.pin_reset = RESET_GPIO_NUM;
  config.xclk_freq_hz = 20000000;
  config.pixel_format = PIXFORMAT_JPEG;

  // init with high specs to pre-allocate larger buffers
  if (psramFound()) {
    config.frame_size = FRAMESIZE_SVGA;
    config.jpeg_quality = 10;  // 0-63 lower number means higher quality
    config.fb_count = 2;
  } else {
    config.frame_size = FRAMESIZE_CIF;
    config.jpeg_quality = 12;  // 0-63 lower number means higher quality
    config.fb_count = 1;
  }
  
  // camera init
  esp_err_t err = esp_camera_init(&config);
  if (err != ESP_OK) {
    Serial.printf("Camera init failed with error 0x%x", err);
    delay(1000);
    ESP.restart();
  }

  digitalWrite(pinLed1, LOW);
}

boolean statusStata = false;

// Fungsi Reset Kamera
void resetCamera() {
  // Deinisialisasi kamera
  esp_camera_deinit();
  
  // Add a delay to ensure camera de-initialization is complete
  delay(1000);
  
  // Initialize the camera again
  camera_config_t config;
  config.ledc_channel = LEDC_CHANNEL_0;
  config.ledc_timer = LEDC_TIMER_0;
  config.pin_d0 = Y2_GPIO_NUM;
  config.pin_d1 = Y3_GPIO_NUM;
  config.pin_d2 = Y4_GPIO_NUM;
  config.pin_d3 = Y5_GPIO_NUM;
  config.pin_d4 = Y6_GPIO_NUM;
  config.pin_d5 = Y7_GPIO_NUM;
  config.pin_d6 = Y8_GPIO_NUM;
  config.pin_d7 = Y9_GPIO_NUM;
  config.pin_xclk = XCLK_GPIO_NUM;
  config.pin_pclk = PCLK_GPIO_NUM;
  config.pin_vsync = VSYNC_GPIO_NUM;
  config.pin_href = HREF_GPIO_NUM;
  config.pin_sscb_sda = SIOD_GPIO_NUM;
  config.pin_sscb_scl = SIOC_GPIO_NUM;
  config.pin_pwdn = PWDN_GPIO_NUM;
  config.pin_reset = RESET_GPIO_NUM;
  config.xclk_freq_hz = 20000000;
  config.pixel_format = PIXFORMAT_JPEG;

  if (psramFound()) {
    config.frame_size = FRAMESIZE_SVGA;
    config.jpeg_quality = 10;
    config.fb_count = 2;
  } else {
    config.frame_size = FRAMESIZE_CIF;
    config.jpeg_quality = 12;
    config.fb_count = 1;
  }

  esp_err_t err = esp_camera_init(&config);
  if (err != ESP_OK) {
    Serial.printf("Camera re-init failed with error 0x%x", err);
    delay(1000);
    ESP.restart();
  }
}

// Fungsi Loop (melakukan looping)
void loop() {
  int stat = digitalRead(Stat);
  if (!stat) {
    if (!statusStata) {
      Serial.println("capture");
      sendPhoto();
    }
    statusStata = true;
  } else {
    statusStata = false;    
  }
}

// Fungsi Mengirim Foto
String sendPhoto() {
  String getAll;
  String getBody;
  
  digitalWrite(pinLed2, HIGH);

  // Reset camera before taking a new photo
  resetCamera();

  delay(500);

  camera_fb_t *fb = esp_camera_fb_get();
  if (!fb) {
    Serial.println("Camera capture failed");
    delay(1000);
    ESP.restart();
  }

  Serial.println("Connecting to server: " + serverName);
// koneksi ke server
  if (client.connect(serverName.c_str(), serverPort)) {
    Serial.println("Connection successful!");    
    
// Membuat Header dan Tail untuk HTTP POST Request
    String head = "--RandomNerdTutorials\r\nContent-Disposition: form-data; name=\"imageFile\"; filename=\".jpg\"\r\nContent-Type: image/jpeg\r\n\r\n";
    String tail = "\r\n--RandomNerdTutorials--\r\n";

    uint32_t imageLen = fb->len;
    uint32_t extraLen = head.length() + tail.length();
    uint32_t totalLen = imageLen + extraLen;
    
// Mengirim HTTP POST Request
    client.println("POST " + serverPath + " HTTP/1.1");
    client.println("Host: " + serverName);
    client.println("Content-Length: " + String(totalLen));
    client.println("Content-Type: multipart/form-data; boundary=RandomNerdTutorials");
    client.println();
    client.print(head);
// mengirim data gambar  
    uint8_t *fbBuf = fb->buf;
    size_t fbLen = fb->len;
    for (size_t n = 0; n < fbLen; n += 1024) {
      if (n + 1024 < fbLen) {
        client.write(fbBuf, 1024);
        fbBuf += 1024;
      } else if (fbLen % 1024 > 0) {
        size_t remainder = fbLen % 1024;
        client.write(fbBuf, remainder);
      }
    }   
    client.print(tail);
    
    esp_camera_fb_return(fb);
    
    int timeoutTimer = 10000;
    long startTimer = millis();
    boolean state = false;
    
    while ((startTimer + timeoutTimer) > millis()) {
      Serial.print(".");
      delay(100);      
      while (client.available()) {
        char c = client.read();
        if (c == '\n') {
          if (getAll.length() == 0) { state = true; }
          getAll = "";
        } else if (c != '\r') { getAll += String(c); }
        if (state == true) { getBody += String(c); }
        startTimer = millis();
      }
      if (getBody.length() > 0) { break; }
    }
    Serial.println();
    client.stop();
    Serial.println(getBody);
  } else {
    getBody = "Connection to " + serverName + " failed.";
    Serial.println(getBody);
  }

  digitalWrite(pinLed2, LOW);

  return getBody;
}