#ifdef USE_ARDUINO
#ifdef USE_RP2040
#include "ota_backend_arduino_rp2040.h"
#include "ota_backend.h"

#include "esphome/components/rp2040/preferences.h"
#include "esphome/core/defines.h"
#include "esphome/core/log.h"

#include <Updater.h>

namespace esphome {
namespace ota {

static const char *const TAG = "ota.arduino_rp2040";

std::unique_ptr<ota::OTABackend> make_ota_backend() { return make_unique<ota::ArduinoRP2040OTABackend>(); }

OTAResponseTypes ArduinoRP2040OTABackend::begin(size_t image_size) {
  // OTA size of 0 is not currently handled, but
  // web_server is not supported for RP2040, so this is not an issue.
  bool ret = Update.begin(image_size, U_FLASH);
  if (ret) {
    rp2040::preferences_prevent_write(true);
    return OTA_RESPONSE_OK;
  }

  uint8_t error = Update.getError();
  if (error == UPDATE_ERROR_BOOTSTRAP)
    return OTA_RESPONSE_ERROR_INVALID_BOOTSTRAPPING;
  if (error == UPDATE_ERROR_NEW_FLASH_CONFIG)
    return OTA_RESPONSE_ERROR_WRONG_NEW_FLASH_CONFIG;
  if (error == UPDATE_ERROR_FLASH_CONFIG)
    return OTA_RESPONSE_ERROR_WRONG_CURRENT_FLASH_CONFIG;
  if (error == UPDATE_ERROR_SPACE)
    return OTA_RESPONSE_ERROR_RP2040_NOT_ENOUGH_SPACE;

  ESP_LOGE(TAG, "Begin error: %d", error);

  return OTA_RESPONSE_ERROR_UNKNOWN;
}

void ArduinoRP2040OTABackend::set_update_md5(const char *md5) {
  Update.setMD5(md5);
  this->md5_set_ = true;
}

OTAResponseTypes ArduinoRP2040OTABackend::write(uint8_t *data, size_t len) {
  size_t written = Update.write(data, len);
  if (written == len) {
    return OTA_RESPONSE_OK;
  }

  uint8_t error = Update.getError();
  ESP_LOGE(TAG, "Write error: %d", error);

  return OTA_RESPONSE_ERROR_WRITING_FLASH;
}

OTAResponseTypes ArduinoRP2040OTABackend::end() {
  // Use strict validation (false) when MD5 is set, lenient validation (true) when no MD5
  // This matches the behavior of the old web_server OTA implementation
  if (Update.end(!this->md5_set_)) {
    return OTA_RESPONSE_OK;
  }

  uint8_t error = Update.getError();
  ESP_LOGE(TAG, "End error: %d", error);

  return OTA_RESPONSE_ERROR_UPDATE_END;
}

void ArduinoRP2040OTABackend::abort() {
  Update.end();
  rp2040::preferences_prevent_write(false);
}

}  // namespace ota
}  // namespace esphome

#endif  // USE_RP2040
#endif  // USE_ARDUINO
