using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using UnityEditor;
using UnityEngine;

namespace P4Connect
{
    /// <summary>
    /// Enter Password Dialog
    /// </summary>
    public class PasswordPrompt : EditorWindow
    {
        public static VerifySettings.ConnectionConfig Cfg { set; get; }
        public static bool Active { get; set; }

        public static PasswordPrompt Instance
        {
            get { return _instance; }
        }

        private static string _newPassword;

        private static PasswordPrompt _instance;

        public static void Init()
        {
            if (Active)
            {
                Instance.Focus();
                return;
            }

            Active = true;
            _instance = ScriptableObject.CreateInstance(typeof(PasswordPrompt)) as PasswordPrompt;
            if (Instance != null)
            {
                Cfg = Config.DefaultConnection;
                _newPassword = Cfg.Password;
                Instance.minSize = new UnityEngine.Vector2(240.0f, 170.0f);
                //Instance.title = "Password Entry";
                Instance.titleContent = new GUIContent("Password Entry");
                Instance.ShowUtility();
            }
        }

        // Close PasswordPrompt Windows if any exist (after restart or run/ pause)
        public static void CloseWindows()
        {
            PasswordPrompt[] windows = Resources.FindObjectsOfTypeAll<PasswordPrompt>();
            if (windows != null)
            {
                foreach (var win in windows)
                {
                    win.Close();
                }
            }
        }

        private static GUIStyle _pwStyle;
        private static GUIStyle _labelStyle;
        private static GUIStyle _boldLabelStyle;
        private static GUIStyle _fatButtonStyle;
        private static GUIStyle _rButtonStyle;
        private static GUIStyle _gButtonStyle;

        private static GUIStyleState _pwStyleState;

        static readonly GUILayoutOption ButtonWidth = GUILayout.Width(100.0f);
        static readonly GUILayoutOption PasswordWidth = GUILayout.Width(220.0f);
        static readonly GUILayoutOption ExpandWidth = GUILayout.ExpandWidth(true);

        static bool _stylesInitialized = false;

        // Static initializer called ONCE from OnGUI() after initialization
        private static void InitializeStyles()
        {
            GUI.skin = Config.GetP4Skin();

            _fatButtonStyle = GUI.skin.GetStyle("fatButton");
            _rButtonStyle = GUI.skin.GetStyle("redFatButton");
            _gButtonStyle = GUI.skin.GetStyle("greenFatButton");

            //_pwStyleState = new GUIStyleState() { background = Icons.GetIcon("button-green.png") as Texture2D, textColor = Color.white };

            _pwStyle = new GUIStyle(GUI.skin.textField)
            {
                alignment = TextAnchor.MiddleCenter,
                fontSize = 20,
                border = new RectOffset(2, 2, 2, 2),
                fixedHeight = 30,              
                //focused = _pwStyleState,
            };

            _labelStyle = new GUIStyle(GUI.skin.label)
            {
                alignment = TextAnchor.MiddleCenter,
                fontSize = 14,
            };

            _boldLabelStyle = new GUIStyle("boldLabel")
            {
                alignment = TextAnchor.MiddleCenter,
                fontSize = 20,
            };

            _newPassword = "";
        }  

        void OnFocus()
        {
            EditorGUI.FocusTextInControl("password");
        }

        void OnGUI()
        {
            if (!_stylesInitialized)
            {
                InitializeStyles();
                _stylesInitialized = true;
            }

            GUILayout.Label("Perforce Password Needed", _boldLabelStyle);

            EditorGUILayout.BeginVertical("Box");
            GUILayout.Label("Server: " + Cfg.Server, _labelStyle);
            GUILayout.Label("Perforce  User: " + Cfg.User, _labelStyle);
            GUILayout.Label("", _labelStyle);

            GUI.SetNextControlName("password");
            _newPassword = EditorGUILayout.PasswordField("Password: ", _newPassword, _pwStyle, ExpandWidth);
            GUILayout.EndVertical();
            GUILayout.FlexibleSpace();
            EditorGUILayout.BeginHorizontal();
            {
                GUILayout.FlexibleSpace();
                if (GUILayout.Button("Cancel", _rButtonStyle, ButtonWidth))
                {
                    Active = false;
                    Close();
                }

                if (GUILayout.Button("Ok", Cfg.Password != _newPassword ? _gButtonStyle : _fatButtonStyle, ButtonWidth))
                {
                    if (!_newPassword.Equals(Cfg.Password))
                    {
                        // Password was changed
                        Cfg.Password = _newPassword;
                        Cfg.PasswordChanged = true;
                        Cfg.PasswordValid = false;
                        Cfg.ToConfig();
                        Active = false;

                        if (Config.ConnectionWizardShowing)
                        {
                            ConnectionWizard.Window.Focus();
                        }
                        else
                        {
                            Config.Valid = Config.CheckSettings();
                            Config.Refresh();
                        }
                        Close();
                    }
                    else
                    {
                        Active = false;
                        Close();
                    }
                }
            }
            GUILayout.EndHorizontal();
        }

        public void OnDestroy()
        {
            Active = false;

            if (ConnectionWizard.Window != null)
            {
                ConnectionWizard.Window.Focus();
            }
        }
    }
}