using System;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;
using System.Diagnostics;

using NaGet.Packages;

namespace AppliStation
{
	/// <summary>
	/// ユーザ設定用フォーム
	/// </summary>
	public partial class UserPrefForm : Form
	{
		private List<RepositoryInfo> repos;
		
		private bool isRepoListChanged;
		
		/// <summary>
		/// コンストラクタ
		/// </summary>
		public UserPrefForm()
		{
			repos = new List<RepositoryInfo>();
			
			InitializeComponent();
			
			loadCurrentPref();
		}
		
		/// <summary>
		/// 現在の設定を読み込む
		/// </summary>
		public void loadCurrentPref()
		{
			this.RepositoriesListSetting = NaGet.Utils.GetDeserializedObject<RepositoriesList>(NaGet.Env.RepositoriesListFile);
			
			NaGet.NaGetLibPref userPref = NaGet.Env.Pref;
			this.ProxyAddress = userPref.ProxyAddress;
		}
		
		#region レポジトリリスト設定関連
		
		/// <summary>
		/// レポジトリリストの設定を読み書きする
		/// </summary>
		public RepositoriesList RepositoriesListSetting {
			get {
				RepositoriesList repoList = new RepositoriesList();
				repoList.Repositories = repos.ToArray();
				return repoList;
			}
			set {
				repos.Clear();
				repos.AddRange(value.Repositories);
				
				updateRepos();
				
				// レポジトリ変更状態をリセットする
				isRepoListChanged = false;
			}
		}
		
		/// <summary>
		/// ListBoxへ表示するレポジトリ表現文字列を返す
		/// </summary>
		/// <param name="repo">対象レポジトリ</param>
		/// <returns>ListBoxに表示すべき文字列</returns>
		private string repoListCheckedListBoxRenderer(RepositoryInfo repo) {
			return string.Format("{0}[{1}]", repo.Name, repo.Url.Href);
		}

		/// <summary>
		/// ListBoxの内容を更新（再構築）する。
		/// </summary>
		private void updateRepos()
		{
			repoListCheckedListBox.Items.Clear();
			
			foreach (RepositoryInfo repo in repos) {
				string label = repoListCheckedListBoxRenderer(repo);
				repoListCheckedListBox.Items.Add(label, repo.Enabled);
			}
		}
		
		void RepoListCheckedListBoxSelectedIndexChanged(object sender, EventArgs e)
		{
			int selectedIndex = repoListCheckedListBox.SelectedIndex;
			bool selected = (selectedIndex >= 0);
			
			removeRepoButton.Enabled	= selected;
			upRepoButton.Enabled		= selected && ((1 <= selectedIndex) && (selectedIndex < repos.Count));
			downRepoButton.Enabled		= selected && ((0 <= selectedIndex) && (selectedIndex < (repos.Count-1)));
			repoUrlLabel.Enabled		= selected;
			repoUrlTextBox.Enabled		= selected;
			if (selected) {
				repoUrlTextBox.Text = repos[repoListCheckedListBox.SelectedIndex].Url.Href;
				repoUrlTextBox.SelectAll();
			} else {
				repoUrlTextBox.Clear();
			}
		}
		
		void AddRepoButtonClick(object sender, EventArgs e)
		{
			RepositoryInfo repo = new RepositoryInfo();
			repo.Name = string.Format("新しいレポジトリ");
			repo.Url = new LocationEntry();
			repo.Enabled = true;
			
			repos.Add(repo);
			
			updateRepos();
			repoListCheckedListBox.SelectedIndex = repos.Count - 1;
			
			isRepoListChanged = true;
		}
		
		void RepoListCheckedListBoxItemCheck(object sender, ItemCheckEventArgs e)
		{
			repos[e.Index].Enabled = (e.NewValue == CheckState.Checked);
			
			isRepoListChanged = true;
		}
		
		void RemoveRepoButtonClick(object sender, EventArgs e)
		{
			int selectedIndex = repoListCheckedListBox.SelectedIndex;
			if ((0 <= selectedIndex) && (selectedIndex < repos.Count)) {
				string text = string.Format("本当にレポジトリ「{0}」を消去しますか?", repos[selectedIndex].Name);
				DialogResult result = MessageBox.Show(text, "レポジトリの削除", MessageBoxButtons.OKCancel, MessageBoxIcon.Question);
				if (result == DialogResult.OK) {
					repos.RemoveAt(selectedIndex);
					repoListCheckedListBox.Items.RemoveAt(selectedIndex);
					
					isRepoListChanged = true;
				}
			}
		}
		
		void UpRepoButtonClick(object sender, EventArgs e)
		{
			int selectedIndex = repoListCheckedListBox.SelectedIndex;
			if ((1 <= selectedIndex) && (selectedIndex < repos.Count)) {
				NaGet.Utils.ListSwap(repos, selectedIndex-1, selectedIndex);
				AppliStation.Util.GUIUtils.CheckedListBox_SwapItems(repoListCheckedListBox, selectedIndex-1, selectedIndex);
				repoListCheckedListBox.SelectedIndex --;
				
				isRepoListChanged = true;
			}
		}
		
		void DownRepoButtonClick(object sender, EventArgs e)
		{
			int selectedIndex = repoListCheckedListBox.SelectedIndex;
			if ((0 <= selectedIndex) && (selectedIndex < (repos.Count-1))) {
				NaGet.Utils.ListSwap(repos, selectedIndex, selectedIndex+1);
				AppliStation.Util.GUIUtils.CheckedListBox_SwapItems(repoListCheckedListBox, selectedIndex, selectedIndex+1);
				repoListCheckedListBox.SelectedIndex ++;
				
				isRepoListChanged = true;
			}
		}
		
		void RepoUrlTextBoxLeave(object sender, EventArgs e)
		{
			int selectedIndex = repoListCheckedListBox.SelectedIndex;
			if ((0 <= selectedIndex) && (selectedIndex < repos.Count)) {
				if (repoUrlTextBox.Text != repos[selectedIndex].Url.Href) {
					repos[selectedIndex].Url = new LocationEntry(repoUrlTextBox.Text);
					repoListCheckedListBox.Items[selectedIndex] = repoListCheckedListBoxRenderer(repos[selectedIndex]);
					
					isRepoListChanged = true;
				}
			}
		}
		
		/// <summary>
		/// レポジトリリストが編集されたか否かのフラグ
		/// </summary>
		/// <remarks>ソフトリストの再読み込みが必要か否かの判断に使われる</remarks>
		public bool IsRepositoryListSettingChanged {
			get { return isRepoListChanged; }
		}
		
		/// <summary>
		/// レポジトリリストの設定を反映する
		/// </summary>
		private void commitRepositoryListSetting()
		{
			if (isRepoListChanged) {
				NaGet.Utils.PutSerializeObject<RepositoriesList>(NaGet.Env.RepositoriesListFile, this.RepositoriesListSetting);
			}
		}
		
		#endregion
		
		#region プロキシサーバ設定関連

		/// <summary>
		/// プロキシアドレスを設定あるいは取得する
		/// </summary>
		public string ProxyAddress {
			get {
				if (proxySameAsIERadioButton.Checked) {
					return string.Empty;	
				} else if (directConnRadioButton.Checked) {
					return "-";
				} else {
					return proxyURLTextBox.Text;
				}
			}
			set {
				if (string.IsNullOrEmpty(value)) {
					proxySameAsIERadioButton.Checked = true;	
				} else if ("-" == value) {
					directConnRadioButton.Checked = true;
				} else {
					specifyProxyRadioButton.Checked = true;
					proxyURLTextBox.Text = value;
				}
				
				updateProxyURLEnability();
			}
		}
		
		/// <summary>
		/// ProxyURLのテキストボックス領域の有効状態を切り替える
		/// </summary>
		private void updateProxyURLEnability()
		{
			bool isSpecifiedProxy = specifyProxyRadioButton.Checked;
			
			proxyURLLabel.Enabled	= isSpecifiedProxy;
			proxyURLTextBox.Enabled	= isSpecifiedProxy;
		}
		
		void ProxyRadioButtonsCheckedChanged(object sender, EventArgs e)
		{
			updateProxyURLEnability();
		}
		
		void OpenInternetOptionLinkLabelLinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
		{
			try {
				ProcessStartInfo procInfo = new ProcessStartInfo("rundll32.exe");
				procInfo.Arguments = "shell32.dll,Control_RunDLL inetcpl.cpl,,4";
				procInfo.UseShellExecute = true;
				procInfo.Verb = "open";
				
				Process.Start(procInfo);
			} catch (Exception) {
				MessageBox.Show("インターネットオプションが開けませんでした", openInternetOptionLinkLabel.Text, MessageBoxButtons.OK, MessageBoxIcon.Error);
			}
		}
		
		/// <summary>
		/// プロキシ設定を、指定された設定オブジェクトに設定する。
		/// </summary>
		/// <param name="pref">設定オブジェクト</param>
		private void commitProxySetting(NaGet.NaGetLibPref pref)
		{
			pref.ProxyAddress = this.ProxyAddress;
		}
		
		#endregion
		
		/// <summary>
		/// 指定された設定オブジェクトをファイルとして保存する
		/// </summary>
		/// <param name="pref">設定ファイル</param>
		private void commitNaGetLibPref(NaGet.NaGetLibPref pref)
		{
			// ファイルに書き込む
			string path = NaGet.Env.PrefPath;
			NaGet.Utils.PutSerializeObject<NaGet.NaGetLibPref>(path, pref);
			
			// 設定についてファイルから設定を再読み込みさせる
			NaGet.Env.LoadPref();
		}
		
		void OkButtonClick(object sender, EventArgs e)
		{
			NaGet.NaGetLibPref pref = NaGet.Env.Pref;
			
			commitRepositoryListSetting();
			commitProxySetting(pref);
			
			commitNaGetLibPref(pref);
		}
		
		void CancelButtonClick(object sender, EventArgs e)
		{
		}
	}
}