#include <WiFi.h>
#include "esp_camera.h"
#include "esp_timer.h"
#include "img_converters.h"
#include "Arduino.h"
#include "esp_http_server.h"

// 👇 TU RED WiFi
const char* ssid = "FAMILIA HERNANDEZ";
const char* password = "Aguila337755$";

// 📸 Configuración de pines para Seeed XIAO ESP32S3 Sense
#define PWDN_GPIO_NUM     -1
#define RESET_GPIO_NUM    -1
#define XCLK_GPIO_NUM     10
#define SIOD_GPIO_NUM     40
#define SIOC_GPIO_NUM     39

#define Y9_GPIO_NUM       48
#define Y8_GPIO_NUM       11
#define Y7_GPIO_NUM       12
#define Y6_GPIO_NUM       14
#define Y5_GPIO_NUM       16
#define Y4_GPIO_NUM       18
#define Y3_GPIO_NUM       17
#define Y2_GPIO_NUM       15
#define VSYNC_GPIO_NUM    38
#define HREF_GPIO_NUM     47
#define PCLK_GPIO_NUM     13

// 🧠 Configuración de la cámara
void startCameraServer();

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

  // 🔌 Conectar a WiFi
  Serial.println("Iniciando conexión WiFi...");
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("\n✅ Conectado a WiFi!");
  Serial.print("📡 IP asignada: ");
  Serial.println(WiFi.localIP());

  // 📷 Configurar cámara
  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;

  // 🧠 Tamaño de imagen y buffers
  config.frame_size = config.frame_size = FRAMESIZE_VGA; // Empieza con QVGA
  config.jpeg_quality = 10;           // Menor = mejor calidad (1–63)
  config.fb_count = 1;
  config.fb_location = CAMERA_FB_IN_PSRAM;

  // 🚨 Inicializar cámara
  Serial.println("Inicializando cámara...");
  esp_err_t err = esp_camera_init(&config);
  if (err != ESP_OK) {
    Serial.printf("❌ Error al inicializar la cámara: 0x%x", err);
    return;
  }

  // 🌐 Iniciar servidor web de streaming
  startCameraServer();
  Serial.println("📽️ Streaming listo. Accede a: ");
  Serial.print("👉 http://");
  Serial.println(WiFi.localIP());
}

void loop() {
  delay(10000); // Nada por ahora
}

// 🌐 Streaming MJPEG
static esp_err_t stream_handler(httpd_req_t *req) {
  camera_fb_t *fb = NULL;
  esp_err_t res = ESP_OK;

  res = httpd_resp_set_type(req, "multipart/x-mixed-replace; boundary=frame");
  if (res != ESP_OK) return res;

  while (true) {
    fb = esp_camera_fb_get();
    if (!fb) {
      Serial.println("❌ Error al capturar imagen");
      continue;
    }

    res = httpd_resp_send_chunk(req, "--frame\r\n"
                                    "Content-Type: image/jpeg\r\n\r\n",
                                    strlen("--frame\r\nContent-Type: image/jpeg\r\n\r\n"));
    if (res == ESP_OK) {
      res = httpd_resp_send_chunk(req, (const char *)fb->buf, fb->len);
    }

    if (res == ESP_OK) {
      res = httpd_resp_send_chunk(req, "\r\n", strlen("\r\n"));
    }

    esp_camera_fb_return(fb);

    if (res != ESP_OK) {
      break;
    }

    delay(100);
  }

  return res;
}

void startCameraServer() {
  httpd_config_t config = HTTPD_DEFAULT_CONFIG();
  config.server_port = 80;

  httpd_uri_t stream_uri = {
    .uri       = "/",
    .method    = HTTP_GET,
    .handler   = stream_handler,
    .user_ctx  = NULL
  };

  httpd_handle_t stream_httpd = NULL;
  if (httpd_start(&stream_httpd, &config) == ESP_OK) {
    httpd_register_uri_handler(stream_httpd, &stream_uri);
  }
}