using System;
using System.Collections.Generic;
using System.Collections.Immutable;
using System.IO;

namespace AnotherReplayReader.ReplayFile
{
    public enum CommandArgumentType
    {
        Int32 = 0,
        Float32 = 1,
        Bool = 2,
        AssetId = 3,
        ObjectId = 4,
        ObjectId_2 = 5,
        UInt32 = 6,
        Vector3 = 7,
        UInt32_2 = 8,
        UInt16 = 9,
        AsciiString = 10,
        UnicodeString = 11,
    }

    public record struct CommandArgumentEntry(CommandArgumentType Type, object Value, int Count);
    public record struct Vector3(float X, float Y, float Z)
    {
        public override readonly string ToString() => $"(X={Math.Round(X)},Y={Math.Round(Y)},Z={Math.Round(Z)})";
    }
    public record struct AssetId(uint TypeId, uint InstanceId)
    {
        public override readonly string ToString() => $"(TypeId={TypeId:X},InstanceId={InstanceId:X})";
    }

    public sealed class CommandChunk
    {
        public int CommandId { get; private set; }
        public int PlayerIndex { get; private set; }
        public ImmutableArray<CommandArgumentEntry> Data { get; private set; }

        public static List<CommandChunk> Parse(ReplayChunk chunk)
        {
            if (chunk.Type != 1)
            {
                throw new NotImplementedException();
            }

            using var reader = chunk.GetReader();
            if (reader.ReadByte() != 1)
            {
                throw new InvalidDataException("Payload first byte not 1");
            }

            var list = new List<CommandChunk>();
            var numberOfCommands = reader.ReadInt32();
            for (var i = 0; i < numberOfCommands; ++i)
            {
                var commandIdAndPlayerId = reader.ReadUInt16();
                var commandId = commandIdAndPlayerId & 0x7FF;
                var playerId = commandIdAndPlayerId >> 11;
                var data = reader.ReadCommandData();
                list.Add(new CommandChunk
                {
                    CommandId = commandId,
                    PlayerIndex = playerId,
                    Data = data.ToImmutableArray(),
                });
            }

            if (reader.BaseStream.Position != reader.BaseStream.Length)
            {
                throw new InvalidDataException("Payload not fully parsed");
            }

            return list;
        }

        public override string ToString()
        {
            return $"[玩家 {PlayerIndex}，{RA3Commands.GetCommandName(CommandId)}]";
        }
    }
    
}