using System.Collections.Generic;
using System.IO;
using System.Runtime.InteropServices;
using Newtonsoft.Json;
using MindPowerSdk;
using UnityEngine;

namespace MindPowerSdk
{
    [StructLayout(LayoutKind.Sequential, Pack = 4, CharSet = CharSet.Ansi)]
    public abstract class CRawDataInfo
    {
        public int bExist;
        public int nIndex;

        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 72)]
        public string szDataName;

        public uint dwLastUseTick;
        public int bEnable;
        public uint pData;
        public uint dwPackOffset;
        public uint dwDataSize;
        public int nID;
        public uint dwLoadCnt;
    }

    /// <summary>
    /// 所有的配置数据，读取方式都是一样的(只要布局好结构)
    /// </summary>
    /// <typeparam name="T"></typeparam>
    public abstract class CRawDataSet<T> where T : CRawDataInfo
    {
        public T[] Data { get; private set; }

        private Dictionary<int, int> _idMap;

        public void LoadBin(string file)
        {
            using var fs = File.OpenRead(file);
            using BinaryReader reader = new BinaryReader(fs);

            long fileSize = fs.Length;
            uint infoSize = reader.ReadUInt32();

            int resNum = (int)(fileSize / infoSize);
            Debug.Log($"{file} - {infoSize}({resNum})");

            Data = new T[resNum];
            _idMap = new Dictionary<int, int>(resNum);
            for (int i = 0; i < resNum; i++)
            {
                byte[] data = reader.ReadBytes((int)infoSize);
                T info = StructReader.ReadStructFromArray<T>(data);
                Data[i] = info;
                _idMap.Add(info.nID, i);
                //Debug.Log(JsonConvert.SerializeObject(info));
            }
        }

        public T Get(int id)
        {
            return Data[_idMap[id]];
        }
    }
}