#include "KOReaderCredentialStore.h"

#include <HalStorage.h>
#include <Logging.h>
#include <MD5Builder.h>
#include <ObfuscationUtils.h>

#include "../../src/JsonSettingsIO.h"

// Initialize the static instance
KOReaderCredentialStore KOReaderCredentialStore::instance;

namespace {
constexpr char KOREADER_FILE_JSON[] = "/.crosspoint/koreader.json";

// Default sync server URL
constexpr char DEFAULT_SERVER_URL[] = "https://sync.koreader.rocks:443";
}  // namespace

bool KOReaderCredentialStore::saveToFile() const {
  Storage.mkdir("/.crosspoint");
  return JsonSettingsIO::saveKOReader(*this, KOREADER_FILE_JSON);
}

bool KOReaderCredentialStore::loadFromFile() {
  if (Storage.exists(KOREADER_FILE_JSON)) {
    String json = Storage.readFile(KOREADER_FILE_JSON);
    if (!json.isEmpty()) {
      bool resave = false;
      bool result = JsonSettingsIO::loadKOReader(*this, json.c_str(), &resave);
      if (result && resave) {
        saveToFile();
        LOG_DBG("KRS", "Resaved KOReader credentials to update format");
      }
      return result;
    }
  }

  LOG_DBG("KRS", "No credentials file found");
  return false;
}

void KOReaderCredentialStore::setCredentials(const std::string& user, const std::string& pass) {
  username = user;
  password = pass;
  LOG_DBG("KRS", "Set credentials for user: %s", user.c_str());
}

std::string KOReaderCredentialStore::getMd5Password() const {
  if (password.empty()) {
    return "";
  }

  // Calculate MD5 hash of password using ESP32's MD5Builder
  MD5Builder md5;
  md5.begin();
  md5.add(password.c_str());
  md5.calculate();

  return md5.toString().c_str();
}

bool KOReaderCredentialStore::hasCredentials() const { return !username.empty() && !password.empty(); }

void KOReaderCredentialStore::clearCredentials() {
  username.clear();
  password.clear();
  saveToFile();
  LOG_DBG("KRS", "Cleared KOReader credentials");
}

void KOReaderCredentialStore::setServerUrl(const std::string& url) {
  serverUrl = url;
  LOG_DBG("KRS", "Set server URL: %s", url.empty() ? "(default)" : url.c_str());
}

std::string KOReaderCredentialStore::getBaseUrl() const {
  std::string url;
  if (serverUrl.empty()) {
    url = DEFAULT_SERVER_URL;
  } else if (serverUrl.find("://") == std::string::npos) {
    // Normalize URL: add http:// if no protocol specified (local servers typically don't have SSL)
    url = "http://" + serverUrl;
  } else {
    url = serverUrl;
  }

  // Strip trailing slashes to avoid double-slash in API paths
  while (!url.empty() && url.back() == '/') {
    url.pop_back();
  }

  return url;
}

void KOReaderCredentialStore::setMatchMethod(DocumentMatchMethod method) {
  matchMethod = method;
  LOG_DBG("KRS", "Set match method: %s", method == DocumentMatchMethod::FILENAME ? "Filename" : "Binary");
}

void KOReaderCredentialStore::setSendMetadata(bool value) {
  sendMetadata = value;
  LOG_DBG("KRS", "Send metadata: %s", value ? "enabled" : "disabled");
}