using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using HeuristicLab.PluginInfrastructure.Manager;
using System.IO;
using System.ComponentModel;
using HeuristicLab.PluginInfrastructure.UpdateLocationReference;

namespace HeuristicLab.PluginInfrastructure.Advanced {
  public class InstallationManagerConsole {
    private InstallationManager installManager;
    public InstallationManagerConsole(string pluginDir) {
      this.installManager = new InstallationManager(pluginDir);
      installManager.PreInstallPlugin += new EventHandler<PluginInfrastructureCancelEventArgs>(installManager_PreInstallPlugin);
      installManager.PreRemovePlugin += new EventHandler<PluginInfrastructureCancelEventArgs>(installManager_PreRemovePlugin);
      installManager.PreUpdatePlugin += new EventHandler<PluginInfrastructureCancelEventArgs>(installManager_PreUpdatePlugin);
      installManager.PluginInstalled += new EventHandler<PluginInfrastructureEventArgs>(installManager_PluginInstalled);
      installManager.PluginRemoved += new EventHandler<PluginInfrastructureEventArgs>(installManager_PluginRemoved);
      installManager.PluginUpdated += new EventHandler<PluginInfrastructureEventArgs>(installManager_PluginUpdated);
    }

    void installManager_PreUpdatePlugin(object sender, PluginInfrastructureCancelEventArgs e) {
      Console.WriteLine("Following plugins are updated:");
      var infos = (IEnumerable<PluginInformation>)e.Entity;
      foreach (var info in infos) {
        Console.WriteLine(info.Name + " " + info.Version + " " + info.BuildDate);
      }
      if (GetUserConfirmation()) e.Cancel = false;
      else e.Cancel = true;
      return;
    }

    void installManager_PluginUpdated(object sender, PluginInfrastructureEventArgs e) {
      foreach (var info in (IEnumerable<PluginInformation>)e.Entity)
        Console.WriteLine("Updated: {0}", info.Name);
    }

    void installManager_PreRemovePlugin(object sender, PluginInfrastructureCancelEventArgs e) {
      Console.WriteLine("Following files are deleted:");
      var fileNames = (IEnumerable<string>)e.Entity;
      foreach (string fileName in fileNames) {
        Console.WriteLine(fileName);
      }
      if (GetUserConfirmation()) e.Cancel = false;
      else e.Cancel = true;
      return;
    }

    void installManager_PluginRemoved(object sender, PluginInfrastructureEventArgs e) {
      foreach (string fileName in (IEnumerable<string>)e.Entity)
        Console.WriteLine("Deleted: {0}", fileName);
    }

    void installManager_PreInstallPlugin(object sender, PluginInfrastructureCancelEventArgs e) {

    }

    void installManager_PluginInstalled(object sender, PluginInfrastructureEventArgs e) {

    }

    private static bool GetUserConfirmation() {
      Console.Write("Are you sure? (Y/n)");
      string input = Console.ReadLine().ToUpperInvariant();
      if (string.IsNullOrEmpty(input) || input == "Y") return true;
      else return false;
    }

    public void Show(IEnumerable<string> pluginNames) {
      foreach (string pluginName in pluginNames)
        Console.WriteLine(installManager.GetInformation(pluginName));
    }

    public void Install(IEnumerable<string> pluginNames) {
      installManager.Install(pluginNames);
    }

    public void Remove(IEnumerable<string> pluginNames) {
      installManager.Remove(pluginNames);
    }

    public void Update(IEnumerable<string> pluginNames) {
      installManager.Update(pluginNames);
    }
  }
}