// Copyright (c) 2026 Cesanta Software Limited
// All rights reserved

#include "mongoose.h"

static void blink_task(void) {
  static uint64_t timer;
  if (mg_timer_expired(&timer, 500, mg_now())) {
    cyw43_arch_gpio_put(CYW43_WL_GPIO_LED_PIN,
                        !cyw43_arch_gpio_get(CYW43_WL_GPIO_LED_PIN));
  }
}

// Self-signed P-256 certificate and key for the HTTPS listener. Created by:
//   openssl ecparam -genkey -name prime256v1 -noout -out key.pem
//   openssl req -x509 -key key.pem -out cert.pem -days 3650 -subj /CN=mg
#define TLS_CERT                                                       \
  "-----BEGIN CERTIFICATE-----\n"                                      \
  "MIIBgjCCASegAwIBAgIUIJOq77Qn7lHbH6WseMemeqorR50wCgYIKoZIzj0EAwIw\n" \
  "FjEUMBIGA1UEAwwLbnVjbGVvLWg3MjMwHhcNMjYxMDEyMTUwMjE5WhcNMzYxMDA5\n" \
  "MTUwMjE5WjAWMRQwEgYDVQQDDAtudWNsZW8taDcyMzBZMBMGByqGSM49AgEGCCqG\n" \
  "SM49AwEHA0IABB6IQJNmzrsdQL+2BnZYS7GYOaj7sz8f6cjBmz3n8D9Em19XodlU\n" \
  "uy4ybIvyhr766lL0ERoTmMUivb/lGmzx9C+jUzBRMB0GA1UdDgQWBBQqxMuc4gj7\n" \
  "MTMzreWlRMNI3QMqTzAfBgNVHSMEGDAWgBQqxMuc4gj7MTMzreWlRMNI3QMqTzAP\n" \
  "BgNVHRMBAf8EBTADAQH/MAoGCCqGSM49BAMCA0kAMEYCIQDY4xaJpuxq6b3rHK3b\n" \
  "lOIQyfkQX+orCRqQUkseplqpqwIhAKswZFNn+2zUNRRNY8+cHmdIwmdpsmxtoWYP\n" \
  "BCjX++LI\n"                                                         \
  "-----END CERTIFICATE-----\n"

#define TLS_KEY                                                        \
  "-----BEGIN EC PRIVATE KEY-----\n"                                   \
  "MHcCAQEEIJ/GBl0TlD52q9PMg1KWaNIdXqp8b/HyIsABmBpqC+O1oAoGCCqGSM49\n" \
  "AwEHoUQDQgAEHohAk2bOux1Av7YGdlhLsZg5qPuzPx/pyMGbPefwP0SbX1eh2VS7\n" \
  "LjJsi/KGvvrqUvQRGhOYxSK9v+UabPH0Lw==\n"                             \
  "-----END EC PRIVATE KEY-----\n"

static void http_ev_handler(struct mg_connection *c, int ev, void *ev_data) {
  if (ev == MG_EV_ACCEPT && c->is_tls) {  // Accepted on the https:// listener
    struct mg_tls_opts opts = {.cert = mg_str(TLS_CERT),
                               .key = mg_str(TLS_KEY)};
    mg_tls_init(c, &opts);
  } else if (ev == MG_EV_HTTP_MSG) {  // New HTTP request received
    struct mg_http_message *hm = (struct mg_http_message *) ev_data;
    uint64_t tick = to_ms_since_boot(get_absolute_time());
    if (mg_match(hm->uri, mg_str("/api/tick"), NULL)) {
      mg_http_reply(c, 200, "", "{%m:%llu}\n", MG_ESC("tick"), tick);
    } else {
      mg_http_reply(c, 200, "", "Hi from Mongoose, tick %llu\n", tick);
    }
  }
}

static void log_fn(char ch, void *param) {
  (void) param;
  putchar(ch);
}

// In an RTOS environment, give this task 8 KB of stack space.
static void run_mongoose(void) {
  struct mg_mgr mgr;
  mg_log_set_fn(log_fn, NULL);
  mg_mgr_init(&mgr);
  mg_http_listen(&mgr, "http://0.0.0.0", http_ev_handler, NULL);
  mg_http_listen(&mgr, "https://0.0.0.0", http_ev_handler, NULL);

  for (;;) {
    mg_mgr_poll(&mgr, 1);
    blink_task();
  }
}

int main(void) {
  stdio_init_all();
  // do not access the CYW43 LED before Mongoose initializes !
  MG_INFO(("Hardware initialised, starting firmware..."));
  run_mongoose();
  return 0;
}