using System;
using System.Collections.Generic;
using System.Text;
using SepCore.Definition;
using SepCore.Entity;
using UnityGameFramework.Runtime;

namespace SepCore.CustomUtility
{
    public static class ItemDescUtility
    {
        private static readonly Dictionary<ParamType, string> _paramTypeNames = new()
        {
            { ParamType.HitRadius, "攻击半宽" },
            { ParamType.SectorAngle, "攻击角度" },
            { ParamType.HitHalfWidth, "横向半宽" },
            { ParamType.PierceLength, "前戳距离" },
            { ParamType.HitHeight, "判定高度" },
        };

        private static readonly string[] _statTypeNames =
        {
            "无效",            // None = 0
            "最大生命",        // MaxHp = 1
            "生命恢复",        // HpRegen = 2
            "生命窃取",        // LifeSteal = 3
            "伤害加成",        // DamagePercent = 4
            "近战伤害",        // MeleeDamage = 5
            "远程伤害",        // RangedDamage = 6
            "元素伤害",        // ElementalDamage = 7
            "攻击速度",        // AttackSpeed = 8
            "暴击率",          // CritChance = 9
            "工程学",          // Engineering = 10
            "攻击范围",        // Range = 11
            "护甲",            // Armor = 12
            "闪避率",          // Dodge = 13
            "移动速度",        // MoveSpeed = 14
            "收获",            // Harvesting = 15
            "幸运"             // Luck = 16
        };
        
        public static string Describe(StatModifierConfig statModifierConfig)
        {
            if (statModifierConfig == null)
            {
                return string.Empty;
            }

            int index = (int)statModifierConfig.StatType;
            string name = (index >= 0 && index < _statTypeNames.Length) ? _statTypeNames[index] : statModifierConfig.StatType.ToString();
            string colorTag = statModifierConfig.Value >= 0 ? "green" : "red";
            string sign = statModifierConfig.Value >= 0 ? "+" : "";

            if (statModifierConfig.ModifierType == ModifierType.PercentAdd)
            {
                float displayPercent = statModifierConfig.Value * 100f;
                return $"{name}: <color={colorTag}>{sign}{displayPercent:0.##}%</color>";
            }

            if (statModifierConfig.ModifierType == ModifierType.PercentMult)
            {
                return $"{name}: <color={colorTag}>x{statModifierConfig.Value:0.##}</color>";
            }

            return $"{name}: <color={colorTag}>{sign}{statModifierConfig.Value:0.##}</color>";
        }
        
        public static string CreatePropDescription(IEnumerable<StatModifierConfig> modifiers)
        {
            if (modifiers == null)
            {
                return null;
            }

            StringBuilder sb = new StringBuilder();
            foreach (StatModifierConfig modifier in modifiers)
            {
                sb.Append(Describe(modifier));
                sb.Append('\n');
            }

            return sb.ToString();
        }

        public static string CreateWeaponDescription(WeaponConfig weaponConfig)
        {
            if (weaponConfig == null)
            {
                return null;
            }

            return CreateWeaponDescription(weaponConfig.Attack, weaponConfig.Cooldown / 1000f,
                weaponConfig.AttackRange / 1000f, weaponConfig.StatModifierConfigs, weaponConfig.Parameters);
        }

        public static string CreateWeaponDescription(WeaponBase weapon)
        {
            if (weapon == null || weapon.WeaponData == null)
            {
                return null;
            }

            return CreateWeaponDescription(weapon.WeaponData);
        }

        public static string CreateWeaponDescription(WeaponData weaponData)
        {
            if (weaponData == null)
            {
                return null;
            }

            return CreateWeaponDescription(weaponData.Attack, weaponData.Cooldown,
                weaponData.AttackRange, weaponData.Modifiers, weaponData.Parameters);
        }

        public static string CreatePropDescription(PropItem prop)
        {
            if (prop == null)
            {
                return null;
            }

            return CreatePropDescription(prop.Modifiers);
        }

        private static string CreateWeaponDescription(int attack, float cooldown, float attackRange,
            IEnumerable<StatModifierConfig> modifiers, IReadOnlyDictionary<ParamType, int> parameters)
        {
            StringBuilder sb = new StringBuilder();
            sb.AppendLine($"攻击: {attack}");
            sb.AppendLine($"冷却: {cooldown}");
            sb.AppendLine($"范围: {attackRange}");

            string modifiersDesc = CreatePropDescription(modifiers);
            if (!string.IsNullOrEmpty(modifiersDesc))
            {
                sb.Append(modifiersDesc);
            }

            if (parameters == null || parameters.Count == 0)
            {
                return sb.ToString();
            }

            foreach (var kvp in parameters)
            {
                if (!_paramTypeNames.TryGetValue(kvp.Key, out string paramName))
                {
                    paramName = kvp.Key.ToString();
                }

                string valStr = kvp.Key == ParamType.SectorAngle
                    ? kvp.Value.ToString()
                    : (kvp.Value / 1000f).ToString("0.##");

                sb.AppendLine($"{paramName}: {valStr}");
            }

            return sb.ToString();
        }
    }
}