#include "esp_camera.h"
#include "SPI.h"
#include "driver/rtc_io.h"
#include "ESP32_MailClient.h"
#include <FS.h>
#include <SPIFFS.h>
#include <WiFi.h>

const char* ssid = "#####";
const char* password = "#####";

// To send Email using Gmail use port 465 (SSL) and SMTP Server smtp.gmail.com
// YOU MUST ENABLE less secure app option https://myaccount.google.com/lesssecureapps?pli=1

#define sender_email    "#####"
#define sender_email_password   "#####"// app password issued by Google
#define SMTP_Server            "smtp.gmail.com"
#define SMTP_Server_Port        465
#define email_subject          "ESP32-CAM Photo Captured"
#define email_recipient        "#####@gmail.com"

#define CAMERA_MODEL_AI_THINKER

#if defined(CAMERA_MODEL_AI_THINKER)
  #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
#else
  #error "Camera model not selected"
#endif

SMTPData smtpData;

#define IMAGE_PATH "/image.jpg"

void setup() {
  WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG, 0); //disable brownout detector
    
  Serial.begin(115200);
  Serial.println();
  WiFi.begin(ssid, password);
  Serial.print("Connecting to WiFi...");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println();
  
  if (!SPIFFS.begin(true)) {
    Serial.println("An Error has occurred while mounting SPIFFS");
    ESP.restart();
  }
  else {
    delay(500);
    Serial.println("SPIFFS mounted successfully");
  }

      bool formatted = SPIFFS.format();
      
  Serial.print("IP Address: http://");
  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;//5000000
  config.pixel_format = PIXFORMAT_JPEG;
  
  if(psramFound()){
    config.frame_size = FRAMESIZE_UXGA;
    config.jpeg_quality = 10;
    config.fb_count = 2;
  } else {
    config.frame_size = FRAMESIZE_SVGA;
    config.jpeg_quality = 12;
    config.fb_count = 1;
  }

  esp_err_t err = esp_camera_init(&config);
  if (err != ESP_OK) {
    Serial.printf("Camera init failed with error 0x%x", err);
    return;
  }
  captureSave_image();
  sendImage();

}

void loop() {
  
  delay(60000);
  captureSave_image();
  sendImage();
   bool formatted = SPIFFS.format();
  

}

// Check if photo capture was successful
bool check_photo( fs::FS &fs ) {
  File f_pic = fs.open( IMAGE_PATH );
  unsigned int pic_sz = f_pic.size();
  return ( pic_sz > 100 );
}

// Capture Photo and Save it to SPIFFS
void captureSave_image( void ) {
  camera_fb_t * fb = NULL; 
  bool ok = 0;

  do {
    Serial.println("ESP32-CAM capturing photo...");

    fb = esp_camera_fb_get();
    delay(500);
    if (!fb) {
      Serial.println("Failed");
      return;
    }
    Serial.printf("Picture file name: %s\n", IMAGE_PATH);
    File file = SPIFFS.open(IMAGE_PATH, FILE_WRITE);
    if (!file) {
      Serial.println("Failed to open file in writing mode");
    }
    else {
      file.write(fb->buf, fb->len); 
      Serial.print("The picture has been saved in ");
      Serial.print(IMAGE_PATH);
      Serial.print(" - Size: ");
      Serial.print(file.size());
      Serial.println(" bytes");
    }
   
    file.close();
    esp_camera_fb_return(fb);

    ok = check_photo(SPIFFS);
  } while ( !ok );
}

void sendImage( void ) {
  smtpData.setLogin(SMTP_Server, SMTP_Server_Port, sender_email, sender_email_password);
  smtpData.setSender("ESP32-CAM", sender_email);
  smtpData.setPriority("High");
  smtpData.setSubject(email_subject);
  smtpData.setMessage("CAM-2 Captured Image.", false);// added 2 to id which cam
  smtpData.addRecipient(email_recipient);
  smtpData.addAttachFile(IMAGE_PATH, "image/jpg");
  smtpData.setFileStorageType(MailClientStorageType::SPIFFS);
  smtpData.setSendCallback(sendCallback);
  
  if (!MailClient.sendMail(smtpData))
    Serial.println("Error sending Email, " + MailClient.smtpErrorReason());

  smtpData.empty();
}

void sendCallback(SendStatus msg) {
  Serial.println(msg.info());
}