// Copyright (C) 2012 The Android Open Source Project
//
// 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.googlesource.gerrit.plugins.gitblit;

import org.eclipse.jgit.lib.Config;

import com.google.gerrit.extensions.annotations.PluginName;
import com.google.gerrit.pgm.init.api.ConsoleUI;
import com.google.gerrit.pgm.init.api.InitFlags;
import com.google.gerrit.pgm.init.api.InitStep;
import com.google.gerrit.pgm.init.api.Section;
import com.google.gerrit.pgm.init.api.Section.Factory;
import com.google.inject.Inject;

public class GitBlitInitStep implements InitStep {
  private final ConsoleUI ui;
  private final String pluginName;
  private final Factory sections;
  private final Config cfg;

  @Inject
  public GitBlitInitStep(ConsoleUI ui,
      Section.Factory sections,
      @PluginName String pluginName,
      InitFlags flags) {
    this.ui = ui;
    this.pluginName = pluginName;
    this.sections = sections;
    this.cfg = flags.cfg;
  }

  @Override
  public void run() throws Exception {
    ui.message("\n");
    ui.header("GitBlit Integration");

    if(ui.yesno(true, "Do you want to use GitBlit as your GitWeb viewer ?")) {
      configureGitBlit();
    }
    // If we don't use GitBlit here, we leave a potential [plugin "gitblit"]
    // section in the config. It won't hurt,
    // and maybe the user will later re-enable GitBlit, and then he'd be
    // surprised if his customized settings were
    // gone.
  }

  private void configureGitBlit() {
    initGitWebConfig();
    initGitBlitPluginConfig();
  }

  private void initGitWebConfig() {
    Section gitWeb = sections.get("gitweb", null);
    gitWeb.set("type", "custom");
    gitWeb.set("url", "plugins/");
    gitWeb.set("project", pluginName + "/summary/?r=${project}");
    gitWeb.set("revision", pluginName + "/commit/?r=${project}&h=${commit}");
    gitWeb.set("branch", pluginName + "/log/?r=${project}&h=${branch}");
    gitWeb.set("filehistory", pluginName
        + "/history/?f=${file}&r=${project}&h=${branch}");
    gitWeb
        .set("file", pluginName + "/blob/?r=${project}&h=${commit}&f=${file}");
    gitWeb.set("roottree", pluginName + "/tree/?r=${project}&h=${commit}");
    gitWeb.string("Link name", "linkname", "GitBlit");
  }

  private void initGitBlitPluginConfig() {
    Section pluginCfg = sections.get("plugin", pluginName);
    // These values are displayed in the UI.
    pluginCfg.string("\"Repositories\" submenu title", "repositories",
        "Repositories", true);
    pluginCfg
        .string("\"Activity\" submenu title", "activity", "Activity", true);
    String originalValue = pluginCfg.get("search");
    if (originalValue == null) {
      pluginCfg
          .string(
              "\"Search\" submenu title (makes only sense to set if some projects are indexed in GitBlit)",
              "search", "", true);
    } else {
      String newValue =
          ui.readString(
              originalValue,
              "%s",
              "\"Search\" submenu title (makes only sense to set if some projects are indexed in GitBlit; single dash unsets)");
      if (newValue == null || "-".equals(newValue)) {
        pluginCfg.unset("search");
      } else if (!originalValue.equals(newValue)) {
        pluginCfg.set("search", newValue);
      }
    }
    pluginCfg.string(
        "\"Browse\" submenu title for the \"Projects\" top-level menu",
        "browse", "Browse", true);
    // If everything is at the default, then make sure we don't have the section
    // at all.
    if (cfg.getNames("plugin", pluginName).isEmpty()) {
      cfg.unsetSection("plugin", pluginName);
    }
  }

  @Override
  public void postRun() throws Exception {
  }
}