using System;
using System.Collections.Generic;
using DynamicExpresso;
using Sirenix.OdinInspector;
using UnityEngine;

namespace Cielonos.MainGame.Characters.Inventory
{
    [CreateAssetMenu(fileName = "UpgradeData", menuName = "Cielonos/Items/UpgradeData")]
    public class UpgradeData : SerializedScriptableObject
    {
        public List<UpgradeInfo> upgrades = new List<UpgradeInfo>();
    }

    [Serializable, InlineProperty]
    public partial class UpgradeInfo
    {
        public UpgradeMode upgradeMode;
        
        [ValueDropdown("@EditorBaseCollection.GetCharacterAttributesDropdown($property)", IsUniqueList = true)]
        public string attributeKey; // 要升级的属性键
        
        [ShowIf("upgradeMode", UpgradeMode.ManualList)]
        public List<float> valueList;
        [ShowIf("upgradeMode", UpgradeMode.ManualList)]
        public float defaultUpgradeValue; // 溢出后的固定增量

        [ShowIf("upgradeMode", UpgradeMode.Expression)]
        public List<LevelRangeExpression> ranges; // 分段函数区间
        [ShowIf("upgradeMode", UpgradeMode.Expression)]
        public string defaultExpression = "0"; // 默认公式
        
        public float GetValue(int level)
        {
            if (upgradeMode == UpgradeMode.ManualList)
            {
                if (valueList.Count == 0)
                {
                    return defaultUpgradeValue * level;
                }
                
                if (level < valueList.Count)
                {
                    return valueList[level];
                }
                
                return valueList[valueList.Count - 1] + (level - valueList.Count + 1) * defaultUpgradeValue;
            }
            else
            {
                // 查找匹配的区间
                foreach (var range in ranges)
                {
                    if (level >= range.minLevel && level <= range.maxLevel)
                    {
                        return UpgradeExpressionEvaluator.Eval(range.expression, level);
                    }
                }
                return UpgradeExpressionEvaluator.Eval(defaultExpression, level);
            }
        }
    }
    
    public partial class UpgradeInfo
    {
        public enum UpgradeMode { ManualList, Expression }
        
        [Serializable, InlineProperty]
        public class LevelRangeExpression
        {
            [HorizontalGroup("Interval"), LabelText("Min"), LabelWidth(40)]
            public int minLevel;
            [HorizontalGroup("Interval", MarginLeft = 40), LabelText("Max"), LabelWidth(40)]
            public int maxLevel;
            [LabelText("Expression"), LabelWidth(80)]
            public string expression;
        }
    }

    public static class UpgradeExpressionEvaluator
    {
        private static readonly Interpreter Interpreter = new Interpreter();

        public static float Eval(string expression, int level)
        {
            object result = Interpreter.Eval(expression, new Parameter("level", level));
            return Convert.ToSingle(result);
        }
    }
}