/*
 * Example for ESP32 Camera Streaming:
 * - Create a Camera device from portal.
 * - Copy the secrets below.
 * - Update WiFi settings
 * - This example needs SDK v3.4.0 or newer
 * 
 * If you encounter any issues:
 * - check the readme.md at https://github.com/sinricpro/esp8266-esp32-sdk/blob/master/README.md
 * - ensure all dependent libraries are installed
 *   - see https://github.com/sinricpro/esp8266-esp32-sdk/blob/master/README.md#arduinoide
 *   - see https://github.com/sinricpro/esp8266-esp32-sdk/blob/master/README.md#dependencies
 * - open serial monitor and check whats happening
 * - check full user documentation at https://sinricpro.github.io/esp8266-esp32-sdk
 * - visit https://github.com/sinricpro/esp8266-esp32-sdk/issues and check for existing issues or open a new one
 */


#include "esp_camera.h"
#include <WiFi.h>

#include "SinricPro.h"
#include "SinricProCamera.h"

// ===================
// Select camera model
// ===================
//#define CAMERA_MODEL_WROVER_KIT // Has PSRAM
#define CAMERA_MODEL_ESP_EYE  // Has PSRAM
//#define CAMERA_MODEL_ESP32S3_EYE // Has PSRAM
//#define CAMERA_MODEL_M5STACK_PSRAM // Has PSRAM
//#define CAMERA_MODEL_M5STACK_V2_PSRAM // M5Camera version B Has PSRAM
//#define CAMERA_MODEL_M5STACK_WIDE // Has PSRAM
//#define CAMERA_MODEL_M5STACK_ESP32CAM // No PSRAM
//#define CAMERA_MODEL_M5STACK_UNITCAM // No PSRAM
//#define CAMERA_MODEL_M5STACK_CAMS3_UNIT  // Has PSRAM
//#define CAMERA_MODEL_AI_THINKER // Has PSRAM
//#define CAMERA_MODEL_TTGO_T_JOURNAL // No PSRAM
//#define CAMERA_MODEL_XIAO_ESP32S3 // Has PSRAM
// ** Espressif Internal Boards **
//#define CAMERA_MODEL_ESP32_CAM_BOARD
//#define CAMERA_MODEL_ESP32S2_CAM_BOARD
//#define CAMERA_MODEL_ESP32S3_CAM_LCD
//#define CAMERA_MODEL_DFRobot_FireBeetle2_ESP32S3 // Has PSRAM
//#define CAMERA_MODEL_DFRobot_Romeo_ESP32S3 // Has PSRAM
#include "camera_pins.h" 

#define WIFI_SSID         "YOUR-WIFI-SSID"
#define WIFI_PASSWD       "YOUR-WIFI-PASSWORD"

#define APP_KEY           "YOUR-APP-KEY"      // Should look like "de0bxxxx-1x3x-4x3x-ax2x-5dabxxxxxxxx". Get it from https://portal.sinric.pro/ -> Credentials
#define APP_SECRET        "YOUR-APP-SECRET"   // Should look like "5f36xxxx-x3x7-4x3x-xexe-e86724a9xxxx-4c4axxxx-3x3x-x5xe-x9x3-333d65xxxxxx" . Get it from https://portal.sinric.pro/ -> Credentials
#define CAMERA_ID         "YOUR-DEVICE-ID"    // Should look like "5dc1564130xxxxxxxxxxxxxx". Get it from https://portal.sinric.pro/ -> Devices
#define BAUD_RATE         115200 // Change baudrate to your need

void cameraInit(void);
void setupLedFlash(int pin);
void startCameraServer();

void setupWiFi() {
  IPAddress ip;

  WiFi.setSleep(false); 
  WiFi.setAutoReconnect(true);   
  WiFi.begin(WIFI_SSID, WIFI_PASSWD);

  while (WiFi.status() != WL_CONNECTED) {
      delay(500);
      Serial.print(".");
  }
  
  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

bool onPowerState(const String &deviceId, bool &state) {
  Serial.printf("Camera %s turned %s (via SinricPro) \r\n", deviceId.c_str(), state?"on":"off");
  return true; // request handled properly
}

bool onSnapshot(const String &deviceId) {
  camera_fb_t *fb = esp_camera_fb_get();

  if (!fb) {
    Serial.println("Failed to grab image");
    return false;
  }

  SinricProCamera &myCamera = SinricPro[deviceId];
  int responseCode = myCamera.sendSnapshot(fb->buf, fb->len);

  // Handle different response codes
  switch (responseCode) {
    case 200:
      Serial.println("Snapshot sent successfully");
      break;
    case 413:
      Serial.println("Error: File exceeds maximum allowed size");
      break;
    case 429:
      Serial.println("Error: Rate limit exceeded");
      break;
    default:
      Serial.printf("Error: Send failed with code %d\n", responseCode);
      break;
  }

  esp_camera_fb_return(fb);
  return responseCode == 200;
}

// setup function for SinricPro
void setupSinricPro() {
  // add device to SinricPro
  SinricProCamera& myCamera = SinricPro[CAMERA_ID];

  // set callback function to device
  myCamera.onPowerState(onPowerState);
  myCamera.onSnapshot(onSnapshot);

  // setup SinricPro
  SinricPro.onConnected([](){ Serial.printf("Connected to SinricPro\r\n"); }); 
  SinricPro.onDisconnected([](){ Serial.printf("Disconnected from SinricPro\r\n"); });
  SinricPro.begin(APP_KEY, APP_SECRET);
}


void setup() {
  Serial.begin(BAUD_RATE);
  Serial.setDebugOutput(true);
  Serial.println();

  setupWiFi();
  setupSinricPro();  
  cameraInit();   
  startCameraServer();
  
  Serial.print("Use 'http://"); Serial.print(WiFi.localIP()); Serial.println("' to view via web");
  Serial.print("Use 'http://"); Serial.print(WiFi.localIP()); Serial.println(":81/stream' to stream via VLC");
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(20);
}

void cameraInit(void){ 
  /* 
    FRAMESIZE_96X96,    // 96x96
    FRAMESIZE_QQVGA,    // 160x120
    FRAMESIZE_QCIF,     // 176x144
    FRAMESIZE_HQVGA,    // 240x176
    FRAMESIZE_240X240,  // 240x240
    FRAMESIZE_QVGA,     // 320x240
    FRAMESIZE_CIF,      // 400x296
    FRAMESIZE_HVGA,     // 480x320
    FRAMESIZE_VGA,      // 640x480
    FRAMESIZE_SVGA,     // 800x600
    FRAMESIZE_XGA,      // 1024x768
    FRAMESIZE_HD,       // 1280x720
    FRAMESIZE_SXGA,     // 1280x1024
    FRAMESIZE_UXGA,     // 1600x1200
  */

  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_sccb_sda = SIOD_GPIO_NUM;
  config.pin_sccb_scl = SIOC_GPIO_NUM;
  config.pin_pwdn = PWDN_GPIO_NUM;
  config.pin_reset = RESET_GPIO_NUM;
  config.xclk_freq_hz = 20000000;
  config.frame_size = FRAMESIZE_UXGA;
  config.pixel_format = PIXFORMAT_JPEG; // for streaming
  config.grab_mode = CAMERA_GRAB_WHEN_EMPTY;
  config.fb_location = CAMERA_FB_IN_PSRAM;
  config.jpeg_quality = 12;
  config.fb_count = 1;
  
  // if PSRAM IC present, init with UXGA resolution and higher JPEG quality
  //                      for larger pre-allocated frame buffer.
  if(config.pixel_format == PIXFORMAT_JPEG){
    if(psramFound()){
      config.jpeg_quality = 10;
      config.fb_count = 2;
      config.grab_mode = CAMERA_GRAB_LATEST;
    } else {
       Serial.printf("PSRAM not found!\n");
      // Limit the frame size when PSRAM is not available
      config.frame_size = FRAMESIZE_SVGA;
      config.fb_location = CAMERA_FB_IN_DRAM;
    }
  } else {
    // Best option for face detection/recognition
    config.frame_size = FRAMESIZE_240X240;
#if CONFIG_IDF_TARGET_ESP32S3
    config.fb_count = 2;
#endif
  }

#if defined(CAMERA_MODEL_ESP_EYE)
  pinMode(13, INPUT_PULLUP);
  pinMode(14, INPUT_PULLUP);
#endif

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

  sensor_t * s = esp_camera_sensor_get();
  // initial sensors are flipped vertically and colors are a bit saturated
  if (s->id.PID == OV3660_PID) {
    s->set_vflip(s, 1); // flip it back
    s->set_brightness(s, 1); // up the brightness just a bit
    s->set_saturation(s, -2); // lower the saturation
  }
  // drop down frame size for higher initial frame rate
  if(config.pixel_format == PIXFORMAT_JPEG){
    s->set_framesize(s, FRAMESIZE_VGA);
  }

#if defined(CAMERA_MODEL_M5STACK_WIDE) || defined(CAMERA_MODEL_M5STACK_ESP32CAM)
  s->set_vflip(s, 1);
  s->set_hmirror(s, 1);
#endif

#if defined(CAMERA_MODEL_ESP32S3_EYE)
  s->set_vflip(s, 1);
#endif

// Setup LED FLash if LED pin is defined in camera_pins.h
#if defined(LED_GPIO_NUM)
  setupLedFlash(LED_GPIO_NUM);
#endif  
}