using System;
using System.Linq;
using game;
using UnityEditor;
using UnityEngine;
using Object = UnityEngine.Object;

public class CheatsWindow : EditorWindow
{
    private bool FreezeLevel
    {
        get
        {
            return _freezeLevel;
        }
        set
        {
            _freezeLevel = value;
            G.DebugFreezeLevel = value;
        }
    }

    private static CheatsWindow _instance = null;
    private static Configs _configs = null;
    private static GameData _save = null;
    private static DataGame _original = null;
    private static DataGame _custom = null;

    private static bool _safeModeForSequence = false;
    private bool _freezeLevel;

    public static bool IsVisible => _instance != null;

    public static void Open()
    {
        _instance = (CheatsWindow)GetWindow(typeof(CheatsWindow));
        _instance.titleContent.text = "Cheats";
        _instance.Show();
    }

    private void OnEnable()
    {
        if (_instance == null)
            _instance = this;
        Load();
        G.DebugFreezeLevel = _freezeLevel;
    }

    public static new void Close()
    {
        ((EditorWindow) _instance).Close();
        _instance = null;
    }

    private static void Load()
    {
        _save = new GameData(Settings.VERSION);
        _save.UnregisterPersistentStructures();
        _save.TryLoadOrCreateNew();

        _original = _save.DevGetState();
        _custom = (DataGame)_original.clone();

        LoadConfigs();
        LoadGameSettings();
    }

    private static void LoadConfigs()
    {
        var asset = Resources.Load<TextAsset>("ext_config/configs/packed_bundle");
        (_configs = new Configs()).Load(new System.IO.MemoryStream(asset.bytes));
    }

    private static void LoadGameSettings()
    {
        var levels = _configs.Get<ConfGameLevels>("@game_levels");
        var buffs = _configs.Get<ConfGameBuffs>("@game_buffs");
        GameSettings.Load(levels, buffs);
    }

    private void OnGUI()
    {
        Render();
    }

    private void Render()
    {
        EditorGUILayout.BeginHorizontal();
        TabOfCurrentData();
        TabOfSettings();
        EditorGUILayout.EndHorizontal();

        Sequence();
        Buttons();
        TabOfHotkeys();
    }

    private static void TabOfCurrentData()
    {
        EditorGUILayout.BeginVertical(GUI.skin.box);
        Title("Original");
        GUILayout.Label($"Completed: {_original.progress.completed}");
        int coinsItem = _original.inventory.purchased.FindIndex(i => i.protoId == EnumConsumable.COIN.GetItemID());
        uint coinsAmount = _original.inventory.purchased.HasIndex(coinsItem)
            ? _original.inventory.purchased[coinsItem].amount
            : 0;
        GUILayout.Label($"Coins: {coinsAmount}");
        EditorGUILayout.EndVertical();
    }

    private static void Title(string text)
    {
        GUILayout.Label(text, new GUIStyle(EditorStyles.label)
        {
            alignment = TextAnchor.MiddleCenter,
            margin = new RectOffset(0, 0, 12, 6),
            fontSize = 16
        });
    }

    private void TabOfSettings()
    {
        EditorGUILayout.BeginVertical(GUI.skin.box);
        Title("Custom");

        EditorGUILayout.BeginHorizontal();
        CompletedInput();
        EditorGUILayout.EndHorizontal();

        EditorGUILayout.BeginHorizontal();
        GUILayout.Label("Coins:", GUILayout.ExpandWidth(false));
        int coinsItemIndex = _custom.inventory.purchased.FindIndex(c =>
            c.protoId == EnumConsumable.COIN.GetItemID());

        if (_custom.inventory.purchased.HasIndex(coinsItemIndex) == false)
        {
            _custom.inventory.purchased.Add(new DataItem
                            { amount = 0, protoId = EnumConsumable.COIN.GetItemID()});
            coinsItemIndex = _custom.inventory.purchased.FindIndex(c =>
                            c.protoId == EnumConsumable.COIN.GetItemID());
        }

        DataItem coinsItem = _custom.inventory.purchased[coinsItemIndex];
        coinsItem.amount = (uint)EditorGUILayout.IntField((int)coinsItem.amount);
        _custom.inventory.purchased[coinsItemIndex] = coinsItem;

        EditorGUILayout.EndHorizontal();

        EditorGUILayout.BeginHorizontal();
        GUILayout.Label($"Safe Mode:", GUILayout.ExpandWidth(false));
        _safeModeForSequence = GUILayout.Toggle(_safeModeForSequence, "");
        GUILayout.Label($"Freeze level:", GUILayout.ExpandWidth(false));
        FreezeLevel = GUILayout.Toggle(FreezeLevel, "");
        EditorGUILayout.EndHorizontal();
        EditorGUILayout.EndVertical();
    }

    private static void CompletedInput()
    {
        GUILayout.Label("Completed: ", GUILayout.ExpandWidth(false));
        var completedInput = (uint)EditorGUILayout.IntField((int)_custom.progress.completed);

        if (completedInput == _custom.progress.completed)
            return;

        if (_safeModeForSequence)
        {
            _custom.progress.completed =
                (uint)Mathf.Min(completedInput, _custom.progress.sequence.Count - 1);
            GUI.FocusControl(null);
        }
        else
        {
            _custom.progress.completed = completedInput;
        }

        var defaultSequenceLenght = GameSettings.Levels.DefaultSequence.Count + GameSettings.Levels.TutorialLenght;
        var sequenceMustBeDefault = completedInput < defaultSequenceLenght;

        if (sequenceMustBeDefault)
        {
            _custom.progress.sequence = SequenceBuilder.BuildDefaultWithTutorial();
            _custom.progress.position = completedInput;
        }
        else
        {
            var outOfSequence = completedInput > _custom.progress.sequence.Count;

            if (outOfSequence)
            {
                _custom.progress.position = 0;
                _custom.progress.sequence = SequenceBuilder.BuildByPattern(GameSettings.Levels.GetRandomPattern());
            }
            else
            {
                _custom.progress.position = completedInput;
            }
        }
    }

    private void Sequence()
    {
        EditorGUILayout.BeginVertical(GUI.skin.box);
        Title("Sequence");
        EditorGUILayout.BeginHorizontal();

        if (_custom.progress.sequence.IsEmpty())
            _custom.progress.sequence = SequenceBuilder.BuildDefaultWithTutorial();

        var sequence = _custom.progress.sequence;
        var buttonsStyle = GetLevelButtonStyle();
        var bonusLevels = GameSettings.Levels.GetIDsBy(l => l.Type == EnumLevelType.TUTORIAL);
        var bossLevels = GameSettings.Levels.GetIDsBy(l => l.Type == EnumLevelType.BOSS);
        const int itemsPerLine = 10;

        for (int i = 0; i < sequence.Count; i++)
        {
            if (_custom.progress.position == i)
            {
                buttonsStyle.normal.background = CreateTexture(Color.red);
            }
            else
            {
                if (bonusLevels.Contains(sequence[i]))
                    buttonsStyle.normal.background = CreateTexture(new Color(0, 0.2f, 0));
                else if (bossLevels.Contains(sequence[i]))
                    buttonsStyle.normal.background = CreateTexture(new Color(0.2f, 0.2f, 0));
                else
                    buttonsStyle.normal.background = CreateTexture(Color.black);
            }

            if (GUILayout.Button($"{sequence[i]}", buttonsStyle))
            {
                _custom.progress.position = (uint) i;
                _custom.progress.completed = (uint) Mathf.Max(0, i - _original.progress.completed);
            }

            if ((i + 1) % itemsPerLine == 0)
            {
                EditorGUILayout.EndHorizontal();
                EditorGUILayout.BeginHorizontal();
            }
        }

        EditorGUILayout.EndHorizontal();
        EditorGUILayout.EndVertical();
    }

    private static GUIStyle GetLevelButtonStyle()
    {
        var button = new GUIStyle(EditorStyles.label)
        {
            alignment = TextAnchor.MiddleCenter,
            margin = new RectOffset(0, 0, 12, 6),
            fontSize = 12,
            normal = {textColor = Color.white}
        };


        return button;
    }

    private static Texture2D CreateTexture(Color color)
    {
        var texture = new Texture2D(1, 1);
        texture.SetPixel(1, 1, color);
        texture.Apply();

        return texture;
    }

    private static void Buttons()
    {
        EditorGUILayout.BeginHorizontal();

        if (GUILayout.Button("Open"))
            OpenPrefab();

        if (GUILayout.Button("Save"))
            Save();

        if (GUILayout.Button("Reset"))
        {
            GameData.ClearAll();
            Load();
        }

        EditorGUILayout.EndHorizontal();
    }

    private static void OpenPrefab()
    {
        string levelName = LevelSettings.GetPrefabPath(_custom.progress.sequence[(int)_custom.progress.completed]);
        AssetDatabase.OpenAsset(AssetDatabase.LoadAssetAtPath<Object>($"Assets/Resources/{levelName}.prefab"));
    }

    private static void Save()
    {
        Error.Assert(EditorApplication.isPlaying == false, "Removed state files might be rewritten by running game");
        PersistError error = _save.DevWriteToFile(GameData.DefaultDataFile, _custom);
        Log.Debug($"CheatsWindow.Save: {error.Code}");

        _save.TryLoadOrCreateNew();
        _original = _save.DevGetState();
        _custom = (DataGame)_original.clone();
    }

    private static void TabOfHotkeys()
    {
        EditorGUILayout.BeginHorizontal();
        EditorGUILayout.HelpBox(
            "Toggle UI visibility: (SPACE)\n" +
            "", MessageType.Info);
        EditorGUILayout.EndHorizontal();
    }
}