using UnityEngine;
using UnityEditor;
using ShiroginSDK.Editor.Bitbucket;
using ShiroginSDK.Runtime.Core.SDK; // Config için
using ShiroginSDK.Runtime.Shared.Constants;

namespace ShiroginSDK.Editor.Windows
{
    [InitializeOnLoad]
    public class ShiroginWelcomeWindow : EditorWindow
    {
        private Texture2D _logo;

        // --- LINKS ---
        private const string DOCS_URL =
            "https://bitbucket.org/batud/shiroginsdk/src/Version_1/Assets/ShiroginSDK/README.md";

        private const string CHANGELOG_URL =
            "https://bitbucket.org/batud/shiroginsdk/src/Version_1/Assets/ShiroginSDK/CHANGELOG.md";

        private const string DISCORD_URL = "https://discord.gg/wgq3tc7h";
        private const string WEBSITE_URL = "https://shirogin.com";

        // --- PREFS ---
        private const string PREF_SHOW_AT_STARTUP = "ShiroginSDK_ShowWelcome_V2";

        static ShiroginWelcomeWindow()
        {
            EditorApplication.delayCall += () =>
            {
                if (EditorPrefs.GetBool(PREF_SHOW_AT_STARTUP, true))
                {
                    ShowWindow();
                }
            };
        }

        [MenuItem("ShiroginSDK/👋 Welcome", false, 0)]
        public static void ShowWindow()
        {
            // Pencere boyutunu biraz artırdım ki sığsın
            var window = GetWindow<ShiroginWelcomeWindow>(true, "Welcome to Shirogin SDK", true);
            window.minSize = new Vector2(500, 520);
            window.maxSize = new Vector2(500, 520);
            window.Show();
        }

        private void OnEnable()
        {
            string[] guids = AssetDatabase.FindAssets(
                "shirogin_logo t:Texture2D",
                new[] { "Assets/ShiroginSDK" }
            );

            if (guids.Length > 0)
            {
                string path = AssetDatabase.GUIDToAssetPath(guids[0]);
                _logo = AssetDatabase.LoadAssetAtPath<Texture2D>(path);
            }
        }

        private void OnGUI()
        {
            DrawBackground();

            GUILayout.BeginVertical();

            // 1. LOGO & BAŞLIK
            DrawHeader();

            GUILayout.Space(15);

            // 2. HOŞGELDİN METNİ (Düzeltildi)
            DrawWelcomeMessage();

            GUILayout.Space(20);

            // 3. BUTONLAR (Setup, Manager, Config)
            DrawActions();

            GUILayout.FlexibleSpace();

            // 4. ALT BİLGİ & LİNKLER
            DrawFooter();

            GUILayout.EndVertical();
        }

        private void DrawBackground()
        {
            EditorGUI.DrawRect(new Rect(0, 0, position.width, position.height), new Color(0.18f, 0.18f, 0.18f));
        }

        private void DrawHeader()
        {
            GUILayout.Space(20);
            if (_logo != null)
            {
                var aspect = (float)_logo.width / _logo.height;
                var width = 120f;
                var height = width / aspect;
                var rect = GUILayoutUtility.GetRect(width, height);
                float xPos = (position.width - width) / 2;
                GUI.DrawTexture(new Rect(xPos, rect.y, width, height), _logo);
            }
            else
            {
                var titleStyle = new GUIStyle(EditorStyles.boldLabel)
                {
                    fontSize = 28,
                    alignment = TextAnchor.MiddleCenter,
                    normal = { textColor = new Color(0.9f, 0.9f, 0.9f) }
                };
                GUILayout.Label("SHIROGIN SDK", titleStyle);
            }

            var subStyle = new GUIStyle(EditorStyles.label)
            {
                fontSize = 12,
                alignment = TextAnchor.MiddleCenter,
                fontStyle = FontStyle.Italic,
                normal = { textColor = new Color(0.6f, 0.6f, 0.6f) }
            };
            // GUILayout.Label("Professional Unity Solutions", subStyle);
        }

        private void DrawWelcomeMessage()
        {
            var style = new GUIStyle(EditorStyles.label)
            {
                wordWrap = true,
                alignment = TextAnchor.MiddleCenter,
                fontSize = 14,
                richText = true,
                normal = { textColor = new Color(0.85f, 0.85f, 0.85f) }
            };

            // GUILayout.Label kullanarak otomatik boyutlandırma sağladık
            GUILayout.BeginHorizontal();
            GUILayout.FlexibleSpace();
            // GUILayout.Label(
            //     "Thank you for choosing <b>ShiroginSDK</b>.\n\n" +
            //     "This toolkit provides everything you need to build scalable games,\n" +
            //     "from Ads and IAP to Analytics and UI Frameworks.",
            //     style, GUILayout.Width(420));
            GUILayout.FlexibleSpace();
            GUILayout.EndHorizontal();
        }

        private void DrawActions()
        {
            GUILayout.BeginHorizontal();
            GUILayout.FlexibleSpace();

            // --- SETUP WIZARD ---
            if (DrawBigButton("🚀 Setup Wizard", "Install essential packages", new Color(0.2f, 0.6f, 0.3f)))
            {
                AssetRegistryEditor.ShowWindow(true);
                Close();
            }

            GUILayout.Space(15);

            // --- ASSET MANAGER ---
            if (DrawBigButton("📦 Asset Manager", "Manage all modules", new Color(0.2f, 0.4f, 0.8f)))
            {
                AssetRegistryEditor.ShowWindow(false);
                Close();
            }

            GUILayout.FlexibleSpace();
            GUILayout.EndHorizontal();

            GUILayout.Space(15);

            // --- OPEN CONFIG BUTTON (YENİ) ---
            GUILayout.BeginHorizontal();
            GUILayout.FlexibleSpace();

            var configBtnStyle = new GUIStyle(GUI.skin.button)
                { fixedHeight = 35, fontSize = 12, fontStyle = FontStyle.Bold };
            GUI.backgroundColor = new Color(0.9f, 0.6f, 0.2f); // Turuncu ton

            if (GUILayout.Button("⚙  Open SDK Config Settings", configBtnStyle, GUILayout.Width(250)))
            {
                SelectConfig();
                Close();
            }

            GUI.backgroundColor = Color.white;

            GUILayout.FlexibleSpace();
            GUILayout.EndHorizontal();
        }

        private bool DrawBigButton(string title, string subtitle, Color color)
        {
            var btnStyle = new GUIStyle(GUI.skin.button);
            var width = 200f;
            var height = 60f;

            var oldColor = GUI.backgroundColor;
            GUI.backgroundColor = color;

            bool clicked = GUILayout.Button("", btnStyle, GUILayout.Width(width), GUILayout.Height(height));

            if (Event.current.type == EventType.Repaint)
            {
                var rect = GUILayoutUtility.GetLastRect();

                var titleStyle = new GUIStyle(EditorStyles.boldLabel)
                {
                    alignment = TextAnchor.MiddleCenter,
                    fontSize = 15,
                    normal = { textColor = Color.white }
                };

                var subStyle = new GUIStyle(EditorStyles.label)
                {
                    alignment = TextAnchor.MiddleCenter,
                    fontSize = 10,
                    normal = { textColor = new Color(1f, 1f, 1f, 0.85f) }
                };

                // Pozisyonları biraz daha hassas ayarladım
                var titleRect = new Rect(rect.x, rect.y + 10, rect.width, 20);
                var subRect = new Rect(rect.x, rect.y + 32, rect.width, 20);

                GUI.Label(titleRect, title, titleStyle);
                GUI.Label(subRect, subtitle, subStyle);
            }

            GUI.backgroundColor = oldColor;
            return clicked;
        }

        private void DrawFooter()
        {
            GUILayout.BeginVertical();

            // Çizgi
            var lineRect = GUILayoutUtility.GetRect(position.width - 40, 1);
            lineRect.x += 20;
            lineRect.width -= 40;
            EditorGUI.DrawRect(lineRect, new Color(0.3f, 0.3f, 0.3f));

            GUILayout.Space(10);

            // Linkler
            GUILayout.BeginHorizontal();
            GUILayout.FlexibleSpace();
            if (LinkButton("📚 Documentation", DOCS_URL))
            {
            }

            GUILayout.Space(15);
            if (LinkButton("📚 Changelog", CHANGELOG_URL))
            {
            }

            GUILayout.Space(15);
            if (LinkButton("💬 Discord", DISCORD_URL))
            {
            }

            GUILayout.Space(15);
            if (LinkButton("🌐 Website", WEBSITE_URL))
            {
            }

            GUILayout.FlexibleSpace();
            GUILayout.EndHorizontal();

            GUILayout.Space(10);

            // Toggle
            GUILayout.BeginHorizontal();
            GUILayout.FlexibleSpace();
            bool show = EditorPrefs.GetBool(PREF_SHOW_AT_STARTUP, true);
            bool newShow = GUILayout.Toggle(show, "Show this window on startup");
            if (newShow != show) EditorPrefs.SetBool(PREF_SHOW_AT_STARTUP, newShow);
            GUILayout.FlexibleSpace();
            GUILayout.EndHorizontal();

            GUILayout.Space(10);
            GUILayout.EndVertical();
        }

        private bool LinkButton(string label, string url)
        {
            var style = new GUIStyle(EditorStyles.label)
            {
                normal = { textColor = new Color(0.4f, 0.7f, 1f) },
                hover = { textColor = Color.white }
            };
            if (GUILayout.Button(label, style, GUILayout.ExpandWidth(false)))
            {
                Application.OpenURL(url);
                return true;
            }

            return false;
        }

        // --- HELPER: CONFIG BULMA VE SEÇME ---
        private void SelectConfig()
        {
            var config = Resources.Load<ShiroginConfig>(SDKConstants.ConfigResourcePath);
            if (config != null)
            {
                Selection.activeObject = config;
                EditorGUIUtility.PingObject(config);
                Debug.Log("[ShiroginSDK] Config file selected.");
            }
            else
            {
                // Resources'da yoksa projede ara
                string[] guids = AssetDatabase.FindAssets("t:ShiroginConfig");
                if (guids.Length > 0)
                {
                    var path = AssetDatabase.GUIDToAssetPath(guids[0]);
                    var obj = AssetDatabase.LoadAssetAtPath<ShiroginConfig>(path);
                    Selection.activeObject = obj;
                    EditorGUIUtility.PingObject(obj);
                }
                else
                {
                    EditorUtility.DisplayDialog("Config Not Found",
                        "ShiroginConfig file could not be found.\nPlease create it via 'Create > ShiroginSDK > ShiroginConfig'.",
                        "OK");
                }
            }
        }
    }
}