#define CAMERA_MODEL_XIAO_ESP32S3 // Define the camera model
#include <esp_camera.h>
#include <WiFi.h>
#include "camera_pins.h"

// Declare the external function from app_httpd.cpp
extern void startCameraServer();

const char* ssid = "Nkw";
const char* password = "plzwork123";

// Define the switch pin
#define SWITCH_PIN 44 // GPIO 44 for the switch

// Pointer for the latest captured image
camera_fb_t* current_image = NULL;

// Capture and overwrite the last image
void capture_image() {
    Serial.println("Attempting to capture a new image...");

    // Release the previous image if it exists
    if (current_image) {
        esp_camera_fb_return(current_image);
        current_image = NULL; // Avoid dangling pointer
    }

    // Capture a new image
    current_image = esp_camera_fb_get();
    if (!current_image) {
        Serial.println("Failed to capture image");
        return;
    }

    Serial.printf("New image captured, size: %d bytes\n", current_image->len);
}

void setup() {
    Serial.begin(115200);

    // Connect to Wi-Fi
    WiFi.begin(ssid, password);
    while (WiFi.status() != WL_CONNECTED) {
        delay(500);
        Serial.print(".");
    }
    Serial.println("\nWiFi connected");
    Serial.println(WiFi.localIP());

    // Camera configuration
    camera_config_t config = {
        .pin_pwdn = PWDN_GPIO_NUM,
        .pin_reset = RESET_GPIO_NUM,
        .pin_xclk = XCLK_GPIO_NUM,
        .pin_sccb_sda = SIOD_GPIO_NUM,
        .pin_sccb_scl = SIOC_GPIO_NUM,
        .pin_d7 = Y9_GPIO_NUM,
        .pin_d6 = Y8_GPIO_NUM,
        .pin_d5 = Y7_GPIO_NUM,
        .pin_d4 = Y6_GPIO_NUM,
        .pin_d3 = Y5_GPIO_NUM,
        .pin_d2 = Y4_GPIO_NUM,
        .pin_d1 = Y3_GPIO_NUM,
        .pin_d0 = Y2_GPIO_NUM,
        .pin_vsync = VSYNC_GPIO_NUM,
        .pin_href = HREF_GPIO_NUM,
        .pin_pclk = PCLK_GPIO_NUM,
        .xclk_freq_hz = 20000000,
        .ledc_timer = LEDC_TIMER_0,
        .ledc_channel = LEDC_CHANNEL_0,
        .pixel_format = PIXFORMAT_JPEG,
        .frame_size = FRAMESIZE_SVGA,
        .jpeg_quality = 10,
        .fb_count = 1
    };

    if (esp_camera_init(&config) != ESP_OK) {
        Serial.println("Camera init failed");
        return;
    }
    
    //Reduce resolution to VGA (640x480)
    .frame_size = FRAMESIZE_VGA, //Reduce resolution to VGA (640x480)
    // Configure the switch pin
    pinMode(SWITCH_PIN, INPUT_PULLUP);

    // Use the external startCameraServer() function
    startCameraServer();
}

void loop() {
    if (digitalRead(SWITCH_PIN) == LOW) { // LOW when pressed
        Serial.println("Switch pressed, capturing image...");
        capture_image();
        delay(500); // Debounce delay
    }
}