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",
            "最大生命",
            "移动速度",
            "伤害",
            "防御",
            "冷却",
            "暴击率",
            "暴击伤害",
            "闪避",
            "金币/经验吸收范围"
        };
        
        public static string Describe(modifier modifier)
        {
            if (modifier == null)
            {
                return string.Empty;
            }

            string name = _statTypeNames[(int)modifier.Key];
            string colorTag = modifier.Value > 0 ? "green" : "red";
            string suffix = modifier.IsPercent ? "%" : string.Empty;
            float displayValue;
            if (modifier.IsPercent)
            {
                displayValue = modifier.Value / 10f;
            }
            else if (modifier.Key == StatType.MovementSpeed)
            {
                displayValue = modifier.Value / 1000f;
            }
            else
            {
                displayValue = modifier.Value;
            }

            return $"{name}: <color={colorTag}>+{displayValue:0.##}{suffix}</color>";
        }
        
        public static string CreatePropDescription(IEnumerable<modifier> modifiers)
        {
            if (modifiers == null)
            {
                return null;
            }

            StringBuilder sb = new StringBuilder();
            foreach (modifier 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.Modifiers, 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<modifier> 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();
        }
    }
}