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


namespace wvdet.CodeChecker
{
    public class CodeChecker : EditorWindow
    {
        private Vector2 _scroll;
        private int _warningCount;
        private int _errorCount;

        private GUIStyle kLabelStyle;
        private GUIStyle kHintStyle;
        private GUIStyle kSuggestionStyle;
        private GUIStyle kWarningStyle;
        private GUIStyle kErrorStyle;
        private GUIStyle kWaitingStyle;
        private GUIStyle kWonderfulStyle;
        private static GUIContent _sceneIcon;

        public List<Result> Results { get; set; }

        private static GUIContent scriptIcon => _sceneIcon ?? (_sceneIcon = EditorGUIUtility.IconContent("d_cs Script Icon"));

        [MenuItem("Evo/Utility/优化/代码检查", false, 30)]
        public static void TopMenuItem()
        {
            var wnd = GetWindow<CodeChecker>();
            wnd.titleContent = new GUIContent("代码检查");
            wnd.minSize = new Vector2(800f, 600f);

            EditorApplication.delayCall += () => { wnd.UpdateResults(); };
        }

        public void UpdateResults()
        {
            EditorUtility.DisplayProgressBar("", "代码检查中...", 0);
            Results = CheckerUtils.CheckCodes();
            Results.ForEach(result => { _errorCount += result.errorCount; });
            Results.ForEach(result => { _warningCount += result.warningCount; });
            EditorUtility.ClearProgressBar();
        }

        private void OnGUI()
        {
            if (kLabelStyle == null)
                InitGuiStyles();

            EditorGUILayout.Separator();
            if (GUILayout.Button("检 查", GUILayout.Height(25)))
                UpdateResults();

            if (Results == null)
                DrawWaitingTip();
            else if (Results.Count > 0)
                DrawAllResults();
            else
                DrawWonderfulTip();
        }

        private void DrawAllResults()
        {
            EditorGUILayout.Separator();

            DrawLabel($"错误：{_errorCount}\t\t警告: {_warningCount}");

            _scroll = GUILayout.BeginScrollView(_scroll, GUILayout.Height(position.height - 40));
            {
                GUI.skin.button.alignment = TextAnchor.UpperLeft;
                {
                    foreach (var result in Results)
                    {
                        EditorGUILayout.BeginVertical(EditorStyles.helpBox);
                        {
                            scriptIcon.text = $"{result.filepath} \t\t (Warning: {result.warningCount}  Error: {result.errorCount})";
                            if (GUILayout.Button(scriptIcon, EditorStyles.linkLabel, GUILayout.Height(20)))
                                EditorGUIUtility.PingObject(AssetDatabase.LoadAssetAtPath(result.filepath, typeof(Object)));

                            for (int i = 0; i < result.details.Count; i++)
                            {
                                if (i >= 1)
                                    DrawGUILine();

                                DrawResultDetail(result.details[i]);

                                if (i < result.details.Count - 1)
                                    EditorGUILayout.Separator();
                            }
                        }
                        EditorGUILayout.EndVertical();
                        EditorGUILayout.Separator();
                    }
                }
                GUI.skin.button.alignment = TextAnchor.MiddleCenter;
            }
            GUILayout.EndScrollView();
        }

        private void DrawResultDetail(Detail detail)
        {
            var style = GetLevelStyle(detail.level);

            if (!string.IsNullOrWhiteSpace(detail.guideline))
                DrawLabel($"规则: {detail.guideline}", style);

            if (detail.line > 0)
                DrawLabel($"行号: {detail.line}");
            if (!string.IsNullOrWhiteSpace(detail.codeSnippet))
                EditorGUILayout.LabelField($"当前: {detail.codeSnippet}", kLabelStyle);
            // DrawLabel($"当前: {detail.codeSnippet}");

            if (!string.IsNullOrWhiteSpace(detail.suggestion))
                DrawLabel($"建议: {detail.suggestion}", kSuggestionStyle);
        }

        private void DrawWaitingTip()
        {
            EditorGUILayout.LabelField("无检查记录，请重新检查", kWaitingStyle, GUILayout.Height(150f));
        }

        private void DrawWonderfulTip()
        {
            EditorGUILayout.LabelField("未检测出不规范的地方\n继续加油！", kWonderfulStyle, GUILayout.Height(150f));
        }

        private GUIStyle GetLevelStyle(Level level)
        {
            var style = kLabelStyle;
            if (level == Level.Hint)
                style = kHintStyle;
            else if (level == Level.Warning)
                style = kWarningStyle;
            else if (level == Level.Error)
                style = kErrorStyle;
            return style;
        }

        private void DrawLabel(string text, GUIStyle style = null)
        {
            // EditorGUILayout.SelectableLabel($"{space}{text}", style ?? kNormalStyle, GUILayout.Height(16f));
            EditorGUILayout.LabelField(text, style ?? kLabelStyle, GUILayout.Height(16f));
        }

        private void InitGuiStyles()
        {
            kLabelStyle = new GUIStyle(EditorStyles.label);
            kLabelStyle.fontSize = 12;
            // kLabelStyle.wordWrap = false;

            kHintStyle = new GUIStyle(kLabelStyle);
            kHintStyle.normal.textColor = Color.cyan;

            kSuggestionStyle = new GUIStyle(kLabelStyle);
            kSuggestionStyle.normal.textColor = Color.green;

            kWarningStyle = new GUIStyle(kLabelStyle);
            kWarningStyle.normal.textColor = Color.yellow;

            kErrorStyle = new GUIStyle(kLabelStyle);
            kErrorStyle.normal.textColor = Color.red;

            kWaitingStyle = new GUIStyle(EditorStyles.label);
            kWaitingStyle.fontSize = 30;
            kWaitingStyle.fontStyle = FontStyle.Bold;
            kWaitingStyle.alignment = TextAnchor.MiddleCenter;
            kWaitingStyle.normal.textColor = Color.grey;

            kWonderfulStyle = new GUIStyle(kWaitingStyle);
            kWonderfulStyle.normal.textColor = Color.green;
        }

        public static void DrawGUILine(int height = 1)
        {
            Rect rect = EditorGUILayout.GetControlRect(false, height);
            rect.height = height;
            EditorGUI.DrawRect(rect, new Color(0.5f, 0.5f, 0.5f, 1));
        }
    }
}