/*
 * Copyright (c) 2020 - present Cloudogu GmbH
 *
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by the Free
 * Software Foundation, version 3.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see https://www.gnu.org/licenses/.
 */

package sonia.scm.server;

import org.eclipse.jetty.server.handler.ContextHandler;

public class ServerConfigYaml {

  private static final String SCM_SERVER_PREFIX = "SCM_";

  // ### Server
  private String addressBinding = "0.0.0.0";
  private int port = 8080;
  private String contextPath = "/scm";
  private int httpHeaderSize = 16384;
  // The default temp dir path depends on the platform
  private String tempDir = "work/scm";
  // Resolves the client ip instead of the reverse proxy ip if the X-Forwarded-For header is present
  private boolean forwardHeadersEnabled = false;
  private int idleTimeout = 0;
  private int maxFormContentSize = ContextHandler.DEFAULT_MAX_FORM_CONTENT_SIZE;
  private int maxFormKeys = ContextHandler.DEFAULT_MAX_FORM_KEYS;

  // ### SSL-related config
  // Only configure SSL if the key store path is set
  private SSLConfig https = new SSLConfig();

  public static class SSLConfig {
    private String keyStorePath = "";
    private String keyStorePassword = "";
    private String keyStoreType = "PKCS12";
    // If the ssl port is set, the http port will automatically redirect to this
    private int sslPort = 8443;

    private boolean redirectHttpToHttps = false;

    public String getKeyStorePath() {
      return getEnvWithDefault("HTTPS_KEY_STORE_PATH", keyStorePath);
    }

    public String getKeyStorePassword() {
      return getEnvWithDefault("HTTPS_KEY_STORE_PASSWORD", keyStorePassword);
    }

    public String getKeyStoreType() {
      return getEnvWithDefault("HTTPS_KEY_STORE_TYPE", keyStoreType);
    }

    public int getSslPort() {
      return getEnvWithDefault("HTTPS_SSL_PORT", sslPort);
    }

    public boolean isRedirectHttpToHttps() {
      return getEnvWithDefault("HTTPS_REDIRECT_HTTP_TO_HTTPS", redirectHttpToHttps);
    }

    public void setKeyStorePath(String keyStorePath) {
      this.keyStorePath = keyStorePath;
    }

    public void setKeyStorePassword(String keyStorePassword) {
      this.keyStorePassword = keyStorePassword;
    }


    public void setKeyStoreType(String keyStoreType) {
      this.keyStoreType = keyStoreType;
    }

    public void setSslPort(int sslPort) {
      this.sslPort = sslPort;
    }

    public void setRedirectHttpToHttps(boolean redirectHttpToHttps) {
      this.redirectHttpToHttps = redirectHttpToHttps;
    }
  }

  public String getAddressBinding() {
    return getEnvWithDefault("ADDRESS_BINDING", addressBinding);
  }

  public void setAddressBinding(String addressBinding) {
    this.addressBinding = addressBinding;
  }

  public int getPort() {
    return getEnvWithDefault("PORT", port);
  }

  public void setPort(int port) {
    this.port = port;
  }

  public String getContextPath() {
    return getEnvWithDefault("CONTEXT_PATH", contextPath);
  }

  public void setContextPath(String contextPath) {
    this.contextPath = contextPath;
  }

  public int getHttpHeaderSize() {
    return getEnvWithDefault("HTTP_HEADER_SIZE", httpHeaderSize);
  }

  public void setHttpHeaderSize(int httpHeaderSize) {
    this.httpHeaderSize = httpHeaderSize;
  }

  public SSLConfig getHttps() {
    return https;
  }

  public void setHttps(SSLConfig https) {
    this.https = https;
  }

  public String getTempDir() {
    return getEnvWithDefault("TEMP_DIR", tempDir);
  }

  public void setTempDir(String tempDir) {
    this.tempDir = tempDir;
  }

  public boolean isForwardHeadersEnabled() {
    return getEnvWithDefault("FORWARD_HEADERS_ENABLED", forwardHeadersEnabled);
  }

  public void setForwardHeadersEnabled(boolean forwardHeadersEnabled) {
    this.forwardHeadersEnabled = forwardHeadersEnabled;
  }

  public int getIdleTimeout() {
    return getEnvWithDefault("IDLE_TIMEOUT", idleTimeout);
  }

  public void setIdleTimeout(int idleTimeout) {
    this.idleTimeout = idleTimeout;
  }

  public int getMaxFormContentSize() {
    return getEnvWithDefault("MAX_FORM_CONTENT_SIZE", maxFormContentSize);
  }

  public void setMaxFormContentSize(int maxFormContentSize) {
    this.maxFormContentSize = maxFormContentSize;
  }

  public int getMaxFormKeys() {
    return getEnvWithDefault("MAX_FORM_KEYS", maxFormKeys);
  }

  public void setMaxFormKeys(int maxFormKeys) {
    this.maxFormKeys = maxFormKeys;
  }

  static int getEnvWithDefault(String envKey, int configValue) {
    String value = getEnv(envKey);
    return value != null ? Integer.parseInt(value) : configValue;
  }

  static String getEnvWithDefault(String envKey, String configValue) {
    String value = getEnv(envKey);
    return value != null ? value : configValue;
  }

  static boolean getEnvWithDefault(String envKey, boolean configValue) {
    String value = getEnv(envKey);
    return value != null ? Boolean.parseBoolean(value) : configValue;
  }

  private static String getEnv(String envKey) {
    return System.getenv(SCM_SERVER_PREFIX + envKey);
  }
}