/*
 * Copyright 2017 Cisco Systems, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License. You may obtain
 * a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 *
 */

package com.cisco.gerrit.plugins.slack.message;

import com.cisco.gerrit.plugins.slack.util.ResourceHelper;
import java.io.IOException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Defines a message template.
 *
 * @author Matthew Montgomery
 */
public class MessageTemplate {
  /** The class logger instance. */
  private static final Logger LOGGER = LoggerFactory.getLogger(MessageTemplate.class);

  private String channel;
  private String name;
  private String action;
  private String project;
  private String branch;
  private String url;
  private int number;
  private String title;
  private String message;

  public String getChannel() {
    return clean(channel);
  }

  public void setChannel(String channel) {
    this.channel = channel;
  }

  public String getName() {
    return clean(name);
  }

  public void setName(String name) {
    this.name = name;
  }

  public String getAction() {
    return clean(action);
  }

  public void setAction(String action) {
    this.action = action;
  }

  public String getProject() {
    return clean(project);
  }

  public void setProject(String project) {
    this.project = project;
  }

  public String getBranch() {
    return clean(branch);
  }

  public void setBranch(String branch) {
    this.branch = branch;
  }

  public String getUrl() {
    return clean(url);
  }

  public void setUrl(String url) {
    this.url = url;
  }

  public int getNumber() {
    return number;
  }

  public void setNumber(int number) {
    this.number = number;
  }

  public String getTitle() {
    return clean(title);
  }

  public void setTitle(String title) {
    this.title = title;
  }

  public String getMessage() {
    return clean(message);
  }

  public void setMessage(String message) {
    this.message = message;
  }

  /**
   * Renders the message template into a String.
   *
   * @return A String representation of the rendered template.
   */
  public String render() {
    String result;
    result = "";

    try {
      String template;
      template = ResourceHelper.loadNamedResourceAsString("message-template.json");

      result =
          String.format(
              template,
              getChannel(),
              getName(),
              getAction(),
              getProject(),
              getBranch(),
              getUrl(),
              getNumber(),
              getTitle(),
              getMessage(),
              "good");
    } catch (IOException e) {
      LOGGER.error("Error rendering template: " + e.getMessage(), e);
    }

    return result;
  }

  /**
   * Cleans up the provided string to make it acceptable for using in a Slack message template. It
   * escapes any double quote characters, trims all leading/trailing whitespace and returns an empty
   * string if the provided string was null.
   *
   * @param str The string to process.
   * @return The message with all occurrences of the double quote character escaped and
   *     leading/trailing whitespace trimmed
   */
  private String clean(String str) {
    if (str != null) {
      str = str.replace("\"", "\\\"").trim();
    } else {
      str = "";
    }

    return str;
  }
}