/**
 * ESP32-S3 Camera Web Server Example.
 * Configures the camera, connects to WiFi, and serves an MJPEG stream.
 * Access URL after connection: http://<local_IP>
 */
/* ───────── KODE | docs.kode.diy ───────── */

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

/* ===========================
   WiFi credentials
   =========================== */
const char *ssid = "**********";       /* WiFi network name */
const char *password = "**********";   /* WiFi network password */

/* External function declarations (implemented elsewhere) */
void startCameraServer();
void setupLedFlash();

void setup() {
  Serial.begin(115200);
  Serial.setDebugOutput(true); /* Enable debug output on Serial */
  Serial.println();

  /* ─── Camera pin mapping and parameters ─── */
  camera_config_t config;
  config.ledc_channel = LEDC_CHANNEL_0;
  config.ledc_timer   = LEDC_TIMER_0;
  config.pin_d0       = 12;
  config.pin_d1       = 11;
  config.pin_d2       = 1;
  config.pin_d3       = 2;
  config.pin_d4       = 3;
  config.pin_d5       = 39;
  config.pin_d6       = 40;
  config.pin_d7       = 41;
  config.pin_xclk     = -1;
  config.pin_pclk     = 13;
  config.pin_vsync    = 42;
  config.pin_href     = 43;
  config.pin_sccb_sda = 48;
  config.pin_sccb_scl = 47;
  config.pin_pwdn     = -1;
  config.pin_reset    = 44;
  config.xclk_freq_hz = 20000000;   /* XCLK frequency */
  config.frame_size   = FRAMESIZE_UXGA;    /* Initial resolution */
  config.pixel_format = PIXFORMAT_JPEG;    /* Format for streaming */
  //config.pixel_format = PIXFORMAT_RGB565; // Option for face detection
  config.grab_mode    = CAMERA_GRAB_WHEN_EMPTY;
  config.fb_location  = CAMERA_FB_IN_PSRAM;
  config.jpeg_quality = 12;   /* JPEG quality (lower number = higher quality) */
  config.fb_count     = 1;

  /* Adjust configuration if PSRAM is available */
  if (config.pixel_format == PIXFORMAT_JPEG) {
    if (psramFound()) {
      config.jpeg_quality = 10;
      config.fb_count     = 2;
      config.grab_mode    = CAMERA_GRAB_LATEST;
    } else {
      /* If PSRAM is not available, reduce resolution to save RAM */
      config.frame_size   = FRAMESIZE_SVGA;
      config.fb_location  = CAMERA_FB_IN_DRAM;
    }
  } else {
    /* Best settings 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 initialization ─── */
  esp_err_t err = esp_camera_init(&config);
  if (err != ESP_OK) {
    Serial.printf("Camera init failed with error 0x%x", err);
    return;
  }

  /* Access the camera sensor for extra configuration */
  sensor_t *s = esp_camera_sensor_get();

  /* Reduce frame size for higher initial frame rate */
  if (config.pixel_format == PIXFORMAT_JPEG) {
    s->set_framesize(s, FRAMESIZE_QVGA);
  }
  
  /* Flip image vertically */
  s->set_vflip(s, 1);

  /* ─── WiFi connection ─── */
  WiFi.begin(ssid, password);
  WiFi.setSleep(false); /* Prevent WiFi from entering sleep mode */

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

  /* ─── Start the camera web server ─── */
  startCameraServer();

  Serial.print("Camera Ready! Access at: http://");
  Serial.println(WiFi.localIP());
}

void loop() {
  /* Web server handles streaming; main loop is idle */
  delay(10000);
}