using System;
using GeometryTD.CustomUtility;
using GeometryTD.Definition;
using UnityEngine;
using UnityGameFramework.Runtime;

namespace GeometryTD.DataTable
{
    /// <summary>
    /// 局外道具掉落池配置表。
    /// </summary>
    public class DROutGameDropPool : DataRowBase
    {
        private int m_Id = 0;

        public override int Id => m_Id;

        public LevelThemeType LevelThemeType { get; private set; }
        public string ItemType { get; private set; }
        public int ItemId { get; private set; }
        public int[] Weights { get; private set; }
        public int[] MinPhase { get; private set; }
        public int[] MaxPhase { get; private set; }

        public override bool ParseDataRow(string dataRowString, object userData)
        {
            string[] columnStrings = dataRowString.Split(DataTableExtension.DataSplitSeparators);
            for (int i = 0; i < columnStrings.Length; i++)
            {
                columnStrings[i] = columnStrings[i].Trim(DataTableExtension.DataTrimSeparators);
            }

            int index = 0;
            index++;
            m_Id = int.Parse(columnStrings[index++]);
            index++;
            LevelThemeType = EnumUtility<LevelThemeType>.Get(columnStrings[index++]);
            ItemType = columnStrings[index++];
            ItemId = ParseIntOrDefault(columnStrings[index++], 0);
            Weights = ParseWeights(columnStrings[index++]);
            MinPhase = ParsePhases(columnStrings[index++], 1);
            MaxPhase = ParsePhases(columnStrings[index++], int.MaxValue);
            NormalizePhaseRanges();

            return true;
        }

        public int GetWeight(RarityType rarity)
        {
            int index = Mathf.Clamp((int)rarity - 1, 0, RarityCount - 1);
            return Weights[index];
        }

        public int GetMinPhase(RarityType rarity)
        {
            int index = Mathf.Clamp((int)rarity - 1, 0, RarityCount - 1);
            return MinPhase[index];
        }

        public int GetMaxPhase(RarityType rarity)
        {
            int index = Mathf.Clamp((int)rarity - 1, 0, RarityCount - 1);
            return MaxPhase[index];
        }

        private static int[] ParseWeights(string raw)
        {
            if (!raw.StartsWith('[') || !raw.EndsWith(']'))
            {
                throw new ArgumentException("Weights must be enclosed in square brackets.");
            }

            if (raw.Length == 2)
            {
                return new int[RarityCount];
            }

            string[] raws = raw.Substring(1, raw.Length - 2).Split(",");
            if (raws.Length != RarityCount)
            {
                throw new ArgumentException($"Weights must contain exactly {RarityCount} values.");
            }

            int[] weights = new int[RarityCount];
            for (int i = 0; i < raws.Length; i++)
            {
                weights[i] = Mathf.Max(0, int.Parse(raws[i]));
            }

            return weights;
        }

        private static int[] ParsePhases(string raw, int fallbackValue)
        {
            if (!raw.StartsWith('[') || !raw.EndsWith(']'))
            {
                throw new ArgumentException("Phase ranges must be enclosed in square brackets.");
            }

            if (raw.Length == 2)
            {
                int[] fallbackValues = new int[RarityCount];
                for (int i = 0; i < fallbackValues.Length; i++)
                {
                    fallbackValues[i] = fallbackValue;
                }

                return fallbackValues;
            }

            string[] raws = raw.Substring(1, raw.Length - 2).Split(",");
            if (raws.Length != RarityCount)
            {
                throw new ArgumentException($"Phase ranges must contain exactly {RarityCount} values.");
            }

            int[] phases = new int[RarityCount];
            for (int i = 0; i < raws.Length; i++)
            {
                phases[i] = int.Parse(raws[i]);
            }

            return phases;
        }

        private void NormalizePhaseRanges()
        {
            for (int i = 0; i < RarityCount; i++)
            {
                if (MinPhase[i] <= 0)
                {
                    MinPhase[i] = 1;
                }

                if (MaxPhase[i] < MinPhase[i])
                {
                    MaxPhase[i] = MinPhase[i];
                }
            }
        }

        private static int ParseIntOrDefault(string raw, int fallbackValue)
        {
            if (int.TryParse(raw, out int parsed))
            {
                return parsed;
            }

            return fallbackValue;
        }

        private const int RarityCount = (int)RarityType.Red;
    }
}