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

#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

const char* ssid = "ESP32-THAT-PROJECT";
const char* password = "California";

const char* websockets_server_host = "192.168.4.1";
const uint16_t websockets_server_port = 8888;

using namespace websockets;
WebsocketsClient client;

void setup() {
  Serial.begin(115200);
  Serial.setDebugOutput(true);
  Serial.println();

  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 = 10000000;
  config.pixel_format = PIXFORMAT_RGB565;
  config.frame_size = FRAMESIZE_QQVGA; // 160x120
  config.jpeg_quality = 10;
  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);
    return;
  }

  WiFi.begin(ssid, password);

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

  Serial.println("Socket Connecting");

  while(!client.connect(websockets_server_host, websockets_server_port, "/")){
    delay(500);
    Serial.print(".");
  }

  Serial.println("Socket Connected!");  
}

void loop() {
  camera_fb_t *fb = NULL;
  esp_err_t res = ESP_OK;
  fb = esp_camera_fb_get();
  if(!fb){
    Serial.println("Camera capture failed");
    esp_camera_fb_return(fb);
    return;
  }

  if(fb->format != PIXFORMAT_RGB565){
    Serial.println("PIXFORMAT_RGB565 not implemented");
    return;
  }

  client.sendBinary((const char*) fb->buf, fb->len);
  esp_camera_fb_return(fb);
}
