using System;
using UnityEditor;
using UnityEngine;

namespace SepCore.Timer.Editor
{
    [CustomEditor(typeof(TimerComponent))]
    public sealed class TimerComponentEditor : UnityEditor.Editor
    {
        private TimerComponent _timer;
        private Vector2 _scrollPosition;
        private bool _showDebugControls = true;

        private void OnEnable()
        {
            _timer = (TimerComponent)target;
            EditorApplication.update += Repaint;
        }

        private void OnDisable()
        {
            EditorApplication.update -= Repaint;
        }

        public override void OnInspectorGUI()
        {
            base.OnInspectorGUI();

            if (!Application.isPlaying)
            {
                EditorGUILayout.HelpBox("运行时显示任务列表和调试信息", MessageType.Info);
                return;
            }

            DrawStatistics();
            DrawDebugControls();
            DrawTaskList();
        }

        private void DrawStatistics()
        {
            TimerTaskSnapshot[] tasks = _timer.GetTaskSnapshots();

            EditorGUILayout.Space();
            EditorGUILayout.LabelField("统计信息", EditorStyles.boldLabel);

            using (new EditorGUILayout.VerticalScope(EditorStyles.helpBox))
            {
                int scaledCount = 0;
                int unscaledCount = 0;
                int errorCount = 0;
                int infiniteCount = 0;

                foreach (TimerTaskSnapshot task in tasks)
                {
                    if (task.TimeMode == TimerTimeMode.Scaled)
                        scaledCount++;
                    else
                        unscaledCount++;

                    if (task.HasError)
                        errorCount++;

                    if (task.RemainingRepeatCount < 0)
                        infiniteCount++;
                }

                using (new EditorGUILayout.HorizontalScope())
                {
                    EditorGUILayout.LabelField("活跃任务", $"{tasks.Length}", GUILayout.Width(120));
                    EditorGUILayout.LabelField("Scaled", $"{scaledCount}", GUILayout.Width(80));
                    EditorGUILayout.LabelField("Unscaled", $"{unscaledCount}", GUILayout.Width(80));
                }

                using (new EditorGUILayout.HorizontalScope())
                {
                    EditorGUILayout.LabelField("无限循环", $"{infiniteCount}", GUILayout.Width(120));
                    EditorGUILayout.LabelField("异常任务", $"{errorCount}", errorCount > 0 ? GetErrorLabelStyle() : GUIStyle.none, GUILayout.Width(80));
                    EditorGUILayout.LabelField("全局状态", _timer.IsPaused ? "<color=orange>已暂停</color>" : "<color=green>运行中</color>", GetRichLabelStyle());
                }
            }
        }

        private void DrawDebugControls()
        {
            EditorGUILayout.Space();
            _showDebugControls = EditorGUILayout.Foldout(_showDebugControls, "调试控制", true);

            if (!_showDebugControls)
                return;

            using (new EditorGUILayout.VerticalScope(EditorStyles.helpBox))
            {
                using (new EditorGUILayout.HorizontalScope())
                {
                    if (GUILayout.Button(_timer.IsPaused ? "恢复全部" : "暂停全部", GUILayout.Height(25)))
                    {
                        if (_timer.IsPaused)
                            _timer.Resume();
                        else
                            _timer.Pause();
                    }

                    if (GUILayout.Button("清理全部", GUILayout.Height(25)))
                    {
                        if (EditorUtility.DisplayDialog("确认", "确定要清除所有定时任务吗？", "确定", "取消"))
                        {
                            _timer.ClearAll();
                        }
                    }
                }
            }
        }

        private void DrawTaskList()
        {
            TimerTaskSnapshot[] tasks = _timer.GetTaskSnapshots();

            EditorGUILayout.Space();
            EditorGUILayout.LabelField($"活跃任务列表 ({tasks.Length})", EditorStyles.boldLabel);

            if (tasks.Length == 0)
            {
                EditorGUILayout.HelpBox("当前没有活跃的定时任务", MessageType.Info);
                return;
            }

            _scrollPosition = EditorGUILayout.BeginScrollView(_scrollPosition);

            foreach (TimerTaskSnapshot task in tasks)
            {
                DrawTaskItem(task);
            }

            EditorGUILayout.EndScrollView();
        }

        private void DrawTaskItem(TimerTaskSnapshot task)
        {
            Color originalColor = GUI.backgroundColor;

            if (task.HasError)
                GUI.backgroundColor = new Color(1f, 0.3f, 0.3f, 0.3f);

            using (new EditorGUILayout.VerticalScope(EditorStyles.helpBox))
            {
                if (task.HasError)
                {
                    EditorGUILayout.LabelField("⚠ 该任务回调曾抛出异常", GetErrorLabelStyle());
                }

                // 头部：ID + 时间模式 + 取消按钮
                using (new EditorGUILayout.HorizontalScope())
                {
                    EditorGUILayout.LabelField($"ID: #{task.Id}", GUILayout.Width(60));

                    string modeLabel = task.TimeMode == TimerTimeMode.Scaled ? "Scaled" : "Unscaled";
                    Color modeColor = task.TimeMode == TimerTimeMode.Scaled ? Color.cyan : Color.yellow;
                    EditorGUILayout.LabelField($"<color=#{ColorUtility.ToHtmlStringRGB(modeColor)}>{modeLabel}</color>", GetRichLabelStyle(), GUILayout.Width(60));

                    string repeatLabel = task.RemainingRepeatCount < 0 ? "∞" : $"{task.RemainingRepeatCount}";
                    EditorGUILayout.LabelField($"剩余: {repeatLabel} 次", GUILayout.Width(80));

                    GUILayout.FlexibleSpace();

                    if (GUILayout.Button("取消", GUILayout.Width(50)))
                    {
                        _timer.Cancel(new TimerHandle(task.Id));
                    }
                }

                // 进度条
                DrawProgressBar(task);

                // 回调信息
                EditorGUILayout.LabelField("回调:", task.CallbackMethod, EditorStyles.miniLabel);

                // 归属对象（可点击 Ping）
                using (new EditorGUILayout.HorizontalScope())
                {
                    EditorGUILayout.LabelField("归属:", GUILayout.Width(40));
                    if (task.Owner is UnityEngine.Object unityObject && unityObject != null)
                    {
                        if (GUILayout.Button(unityObject.name, EditorStyles.linkLabel))
                        {
                            EditorGUIUtility.PingObject(unityObject);
                            Selection.activeObject = unityObject;
                        }
                    }
                    else if (task.Owner != null)
                    {
                        EditorGUILayout.LabelField(task.Owner.ToString(), EditorStyles.miniLabel);
                    }
                    else
                    {
                        EditorGUILayout.LabelField("(无归属对象)", EditorStyles.miniLabel);
                    }
                }
            }

            GUI.backgroundColor = originalColor;
            EditorGUILayout.Space(2);
        }

        private void DrawProgressBar(TimerTaskSnapshot task)
        {
            float progress;
            string label;

            if (task.Interval <= 0f || task.RemainingRepeatCount == 1)
            {
                // 一次性任务：显示延迟进度
                float totalTime = Mathf.Max(task.Interval, task.RemainingTime);
                progress = totalTime > 0f ? 1f - (task.RemainingTime / totalTime) : 1f;
                label = $"剩余 {task.RemainingTime:F2}s (一次性)";
            }
            else if (task.RemainingRepeatCount < 0)
            {
                // 无限循环：显示当前周期进度
                progress = 1f - (task.RemainingTime / task.Interval);
                label = $"剩余 {task.RemainingTime:F2}s (无限循环)";
            }
            else
            {
                // 有限循环：显示当前周期进度
                progress = 1f - (task.RemainingTime / task.Interval);
                label = $"剩余 {task.RemainingTime:F2}s (周期进度)";
            }

            Rect rect = EditorGUILayout.GetControlRect(false, 18);
            EditorGUI.ProgressBar(rect, Mathf.Clamp01(progress), label);
        }

        private static GUIStyle GetRichLabelStyle()
        {
            GUIStyle style = new GUIStyle(EditorStyles.label);
            style.richText = true;
            return style;
        }

        private static GUIStyle GetErrorLabelStyle()
        {
            GUIStyle style = new GUIStyle(EditorStyles.label);
            style.normal.textColor = Color.red;
            style.fontStyle = FontStyle.Bold;
            return style;
        }
    }
}