using System;
using UnityEngine;
using UnityEngine.UI;
using Vanguard.App;

namespace Vanguard.UI
{
    /// <summary>
    /// Гамбургер-меню экрана: язык, версия и адрес сервера. В Lobby добавляется
    /// «Выйти». Закрывается кнопкой, кликом вне панели и по Esc (через драйвер
    /// экрана).
    /// </summary>
    public sealed class HamburgerMenu
    {
        private readonly GameObject _blocker;
        private readonly RectTransform _panel;
        private readonly Action _onLogout;
        private readonly Action _onHistory;

        public HamburgerMenu(
            Transform parent,
            AppConfig config,
            Action onLogout = null,
            Action onHistory = null,
            string title = "Меню")
        {
            _onLogout = onLogout;
            _onHistory = onHistory;

            _blocker = new GameObject(
                "MenuBlocker",
                typeof(RectTransform),
                typeof(Image),
                typeof(Button));
            var blockerRect = (RectTransform)_blocker.transform;
            blockerRect.SetParent(parent, false);
            UiKit.Stretch(blockerRect);

            var blockerImage = _blocker.GetComponent<Image>();
            blockerImage.color = new Color(0f, 0f, 0f, 0.001f);
            blockerImage.raycastTarget = true;

            var blockerButton = _blocker.GetComponent<Button>();
            blockerButton.transition = Selectable.Transition.None;
            blockerButton.onClick.AddListener(Close);
            _blocker.SetActive(false);

            var burger = NeonUi.AddAnchored(
                parent,
                "MenuButton",
                NeonUi.Body(
                    56,
                    56,
                    12,
                    new Color(0.027f, 0.066f, 0.17f, 0.92f),
                    new Color(0.18f, 0.49f, 1f, 0.85f),
                    1),
                new Vector2(56f, 56f),
                new Vector2(1f, 1f),
                new Vector2(1f, 1f),
                new Vector2(-28f, -28f));

            var burgerImage = burger.GetComponent<Image>();
            burgerImage.raycastTarget = true;

            var burgerButton = burger.gameObject.AddComponent<Button>();
            burgerButton.targetGraphic = burgerImage;
            burgerButton.transition = Selectable.Transition.ColorTint;
            burgerButton.colors = new ColorBlock
            {
                normalColor = Color.white,
                highlightedColor = new Color(1.15f, 1.15f, 1.15f, 1f),
                pressedColor = new Color(0.9f, 0.9f, 0.9f, 1f),
                selectedColor = Color.white,
                disabledColor = new Color(0.6f, 0.6f, 0.6f, 0.5f),
                colorMultiplier = 1f,
                fadeDuration = 0.08f,
            };
            burgerButton.onClick.AddListener(Toggle);

            var barColor = new Color(0.75f, 0.88f, 1f, 0.95f);
            for (var i = -1; i <= 1; i++)
            {
                NeonUi.AddImage(
                    burger,
                    "Bar" + i,
                    NeonUi.HorizontalBar(22, 2, barColor),
                    new Vector2(22f, 2f),
                    new Vector2(0f, i * 7f));
            }

            var height = 300f
                + (onLogout != null ? 56f : 0f)
                + (onHistory != null ? 46f : 0f);
            var panelGo = new GameObject("MenuPanel", typeof(RectTransform), typeof(Image));
            _panel = (RectTransform)panelGo.transform;
            _panel.SetParent(parent, false);
            _panel.anchorMin = new Vector2(1f, 1f);
            _panel.anchorMax = new Vector2(1f, 1f);
            _panel.pivot = new Vector2(1f, 1f);
            _panel.anchoredPosition = new Vector2(-28f, -96f);
            _panel.sizeDelta = new Vector2(340f, height);

            var panelImage = panelGo.GetComponent<Image>();
            panelImage.sprite = NeonUi.Body(
                340,
                Mathf.RoundToInt(height),
                16,
                new Color(0.027f, 0.066f, 0.17f, 0.96f),
                new Color(0.18f, 0.49f, 1f, 0.85f),
                1);
            panelImage.type = Image.Type.Simple;
            panelImage.raycastTarget = true;

            BuildContent(config, title);
            _panel.gameObject.SetActive(false);
        }

        public bool IsOpen => _panel != null && _panel.gameObject.activeSelf;

        public void Toggle()
        {
            if (IsOpen)
                Close();
            else
                Open();
        }

        public void Open()
        {
            _blocker.SetActive(true);
            _panel.gameObject.SetActive(true);
            _panel.SetAsLastSibling();
        }

        public void Close()
        {
            _panel.gameObject.SetActive(false);
            _blocker.SetActive(false);
        }

        private void BuildContent(AppConfig config, string title)
        {
            UiKit.AddVerticalLayout(_panel, 16, 10);

            var header = UiKit.CreateText(
                _panel,
                "Title",
                title,
                18,
                new Color(0.82f, 0.9f, 1f),
                TextAnchor.MiddleLeft);
            UiKit.SetPreferredHeight(header, 24f);

            var row = new GameObject("LanguageRow", typeof(RectTransform));
            row.transform.SetParent(_panel, false);
            UiKit.SetPreferredHeight(row.transform, 36f);

            var languageLabel = UiKit.CreateText(
                row.transform,
                "Label",
                "Язык",
                15,
                new Color(0.66f, 0.76f, 0.9f),
                TextAnchor.MiddleLeft);
            var labelRect = languageLabel.rectTransform;
            labelRect.anchorMin = new Vector2(0f, 0f);
            labelRect.anchorMax = new Vector2(0.6f, 1f);
            labelRect.offsetMin = Vector2.zero;
            labelRect.offsetMax = Vector2.zero;

            var language = UiKit.CreateLanguageButton(row.transform, "Language");
            var languageRect = language.GetComponent<RectTransform>();
            languageRect.anchorMin = new Vector2(1f, 0.5f);
            languageRect.anchorMax = new Vector2(1f, 0.5f);
            languageRect.pivot = new Vector2(1f, 0.5f);
            languageRect.sizeDelta = new Vector2(64f, 32f);
            languageRect.anchoredPosition = Vector2.zero;

            var version = UiKit.CreateText(
                _panel,
                "Version",
                "Версия " + Application.version,
                13,
                new Color(0.52f, 0.62f, 0.78f),
                TextAnchor.MiddleLeft);
            UiKit.SetPreferredHeight(version, 18f);
            UiKit.MakeLiteral(version);

            var caption = UiKit.CreateText(
                _panel,
                "ServerCaption",
                "Адрес сервера",
                13,
                new Color(0.52f, 0.62f, 0.78f),
                TextAnchor.MiddleLeft);
            UiKit.SetPreferredHeight(caption, 16f);

            var server = UiKit.CreateInput(_panel, "ServerUrl", "http://host:port");
            UiKit.SetPreferredHeight(server, 42f);
            server.text = config.ServerBaseUrl;
            UiKit.MakeLiteral(server.textComponent);
            server.onEndEdit.AddListener(value =>
            {
                config.SetServerBaseUrl(value);
                server.text = config.ServerBaseUrl;
            });

            if (_onHistory != null)
            {
                var history = UiKit.CreateButton(
                    _panel,
                    "History",
                    "История матчей",
                    () =>
                    {
                        Close();
                        _onHistory();
                    },
                    15);
                var historyImage = history.GetComponent<Image>();
                if (historyImage != null)
                    historyImage.color = new Color(0.06f, 0.12f, 0.24f, 0.95f);
                UiKit.SetPreferredHeight(history, 36f);
            }

            if (_onLogout != null)
            {
                var logout = UiKit.CreateButton(
                    _panel,
                    "Logout",
                    "Выйти",
                    () =>
                    {
                        Close();
                        _onLogout();
                    },
                    15);
                var logoutImage = logout.GetComponent<Image>();
                if (logoutImage != null)
                    logoutImage.color = new Color(0.36f, 0.09f, 0.12f, 0.95f);
                UiKit.SetPreferredHeight(logout, 36f);
            }

            var close = UiKit.CreateButton(_panel, "Close", "Закрыть", Close, 15);
            var closeImage = close.GetComponent<Image>();
            if (closeImage != null)
                closeImage.color = new Color(0.06f, 0.12f, 0.24f, 0.95f);
            UiKit.SetPreferredHeight(close, 36f);
        }
    }
}