using System.Collections.Generic;
using System.Text;
using cfg.LevelCfg;
using GamePlay.Building.Fight.Impl.Builds;
using Gameplay.Character;
using Gameplay.Unit;
using UnityEditor;
using UnityEngine;

namespace FightDebug
{
    public class SingleUnitSearchLightDebugPanel
    {
        private int _targetCellIndex = -1;
        private string _targetError = "";

        public void Reset()
        {
            _targetCellIndex = -1;
            _targetError = "";
        }

        public void Draw(GameUnit unit)
        {
            var searchLight = unit as UnitBuildSearchLight;
            if (searchLight == null)
            {
                return;
            }

            _DrawSearchLight(searchLight);
        }

        private void _DrawSearchLight(UnitBuildSearchLight searchLight)
        {
            GUILayout.BeginVertical("box");
            GUILayout.Label("探照灯调试", EditorStyles.boldLabel);

            var enterUnit = searchLight.enterUnit;
            var canControl = enterUnit != null && enterUnit.commonData.troopId == ETroopsId.Self;
            var cellIndexes = searchLight.DebugLightUpCellIndexes;
            var cellIndexListText = _BuildCellIndexListText(cellIndexes);

            _ShowLabel("建筑阵营:", _GetTroopName(searchLight.commonData.troopId));
            _ShowLabel("进驻单位:", enterUnit != null ? enterUnit.GetDescString() : "无");
            if (enterUnit != null)
            {
                _ShowLabel("进驻单位ID:", enterUnit.GetID() + "", true);
                _ShowLabel("进驻单位阵营:", _GetTroopName(enterUnit.commonData.troopId));
            }

            _ShowLabel("允许调试控制:", canControl ? "是" : "否");
            _ShowLabel("中心格子数量:", searchLight.DebugLightUpCellCount + "");
            _ShowLabel("中心格子列表:", cellIndexListText, true);
            _ShowLabel("当前中心格子:", searchLight.nowLookCellIndex + "", true);
            _ShowLabel("当前索引:", searchLight.DebugCurrentIndex + "");
            _ShowLabel("上一个中心格子:", searchLight.DebugLastLightUpCellIndex + "");
            _ShowLabel("待目标格子:", searchLight.DebugControlTargetCellIndex + "", true);
            _ShowLabel("照亮范围:", searchLight.lightUpDistance + "格");
            _ShowLabel("停留时间:", searchLight.DebugPosStayTime.ToString("F2") + "秒");
            _ShowLabel("当前停留计时:", searchLight.DebugNowStayTime.ToString("F2") + "秒");
            _ShowLabel("循环模式:", _GetLoopTypeName(searchLight.DebugLoopType));
            _ShowLabel("当前旋转方向:", _GetRotateDirName(searchLight.DebugNowRotateDir));

            if (_targetCellIndex < 0 && searchLight.nowLookCellIndex >= 0)
            {
                _targetCellIndex = searchLight.nowLookCellIndex;
            }

            GUILayout.BeginHorizontal();
            GUILayout.Label("目标中心格子:", GUILayout.Width(140));
            _targetCellIndex = EditorGUILayout.IntField(_targetCellIndex);
            GUILayout.EndHorizontal();

            EditorGUI.BeginDisabledGroup(!canControl);
            if (GUILayout.Button("设置目标位置"))
            {
                _TrySetTarget(searchLight);
            }
            EditorGUI.EndDisabledGroup();

            if (!canControl)
            {
                EditorGUILayout.HelpBox("仅当探照灯内部进驻己方单位时允许设置目标位置。", MessageType.Info);
            }

            if (!string.IsNullOrEmpty(_targetError))
            {
                EditorGUILayout.HelpBox(_targetError, MessageType.Warning);
            }

            GUILayout.EndVertical();
        }

        private void _TrySetTarget(UnitBuildSearchLight searchLight)
        {
            _targetError = "";
            var enterUnit = searchLight.enterUnit;
            if (enterUnit == null)
            {
                _targetError = "探照灯内部没有进驻单位，无法设置目标位置。";
                return;
            }

            if (enterUnit.commonData.troopId != ETroopsId.Self)
            {
                _targetError = "探照灯内部不是己方单位，无法设置目标位置。";
                return;
            }

            if (!_ContainsCellIndex(searchLight.DebugLightUpCellIndexes, _targetCellIndex))
            {
                _targetError = "目标格子不在探照灯可照亮中心格子列表内。";
                return;
            }

            searchLight.SetLightUpCellIndex(_targetCellIndex);
        }

        private void _ShowLabel(string label, string value, bool showCopy = false)
        {
            GUILayout.BeginHorizontal();
            GUILayout.Label(label, GUILayout.Width(140));
            GUILayout.Label(value);
            if (showCopy)
            {
                if (GUILayout.Button("复制", GUILayout.Width(60)))
                {
                    EditorGUIUtility.systemCopyBuffer = value;
                }
            }

            GUILayout.EndHorizontal();
        }

        private bool _ContainsCellIndex(IReadOnlyList<int> cellIndexes, int cellIndex)
        {
            if (cellIndexes == null)
            {
                return false;
            }

            for (int i = 0; i < cellIndexes.Count; i++)
            {
                if (cellIndexes[i] == cellIndex)
                {
                    return true;
                }
            }

            return false;
        }

        private string _BuildCellIndexListText(IReadOnlyList<int> cellIndexes)
        {
            if (cellIndexes == null || cellIndexes.Count <= 0)
            {
                return "";
            }

            var builder = new StringBuilder(cellIndexes.Count * 4);
            for (int i = 0; i < cellIndexes.Count; i++)
            {
                if (i > 0)
                {
                    builder.Append(",");
                }

                builder.Append(cellIndexes[i]);
            }

            return builder.ToString();
        }

        private string _GetTroopName(int troopId)
        {
            switch (troopId)
            {
                case ETroopsId.Self:
                    return "己方";
                case ETroopsId.Enemy:
                    return "敌方";
                case ETroopsId.Neutral:
                    return "中立";
                default:
                    return "未知(" + troopId + ")";
            }
        }

        private string _GetLoopTypeName(UnitBuildSearchLight.ELooperType loopType)
        {
            switch (loopType)
            {
                case UnitBuildSearchLight.ELooperType.Loop:
                    return "循环";
                case UnitBuildSearchLight.ELooperType.PingPong:
                    return "折返";
                default:
                    return "未知(" + loopType + ")";
            }
        }

        private string _GetRotateDirName(UnitBuildSearchLight.ERotateDir rotateDir)
        {
            switch (rotateDir)
            {
                case UnitBuildSearchLight.ERotateDir.Left:
                    return "左";
                case UnitBuildSearchLight.ERotateDir.Right:
                    return "右";
                default:
                    return rotateDir.ToString();
            }
        }
    }
}