using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Runtime.InteropServices;
using UnityEngine;


public class PogFile
{
    [Serializable]
    [StructLayout(LayoutKind.Sequential, Pack = 1)]
    public struct ObjectRecord {
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
        public string Name;

        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
        public byte[] SomeData;

        public short XOffset;
        public short YOffset;
        public short ZOffset;

        public short ID;
        public short XRotation;          // 4096 = 360°
        public short YRotation;          // 4096 = 360°
        public short ZRotation;          // 4096 = 360°
        public short TypeID;            // Model type id (instancing)

        public short BoundingBoxWidth;
        public short BoundingBoxHeight;
        public short BoundingBoxLength;

        public short BoundingBoxType;

        public short Short0;
        public byte Byte0;

        public byte Team;

        public short ScriptType;

        public byte ScriptGroup;
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 19)]
        public byte[] ScriptParamters;
        public short ScriptXOffset;
        public short ScriptYOffset;
        public short ScriptZOffset;

        public short Flag;

        public short Short1;
        public short Short2;

    }


    private ObjectRecord[] _objects;

    public ObjectRecord[] Objects {
        get { return _objects; }
    }

    public static PogFile Parse(byte[] data) {
        PogFile result = new PogFile();

        MemoryStream src = new MemoryStream(data);

        BinaryReader r = new BinaryReader(src);
        var count = r.ReadUInt16();

        var itemSize = Marshal.SizeOf<ObjectRecord>();


        List<ObjectRecord> records = new List<ObjectRecord>();
        for (int i = 0; i < count; ++i) {
            var itemData = r.ReadBytes(itemSize);

            var handle = GCHandle.Alloc(itemData, GCHandleType.Pinned);
            records.Add( Marshal.PtrToStructure<ObjectRecord>(handle.AddrOfPinnedObject()));


        }
        result._objects = records.ToArray();

        return result;
    }


}