using System;
using System.Collections.Generic;
using System.Linq;
using LibAC.NBT.API;
using LibAC.Utilities;

namespace LibAC.NBT.API
{
    public static class NbtUtils
    {
        public static void WriteBoolean(CompoundTag tag, string name, bool value)
        {
            tag.Put(name, ByteTag.ValueOf(value ? (byte)1 : (byte)0));
        }

        public static bool ReadBoolean(CompoundTag tag, string name)
        {
            if (tag.ContainsKey(name))
            {
                return tag.Get(name).AsByte() == 1;
            }
            return false;
        }

        public static void WriteVector2d(CompoundTag tag, string name, Vector2d pos)
        {
            var posTag = new ListTag();
            posTag.Add(DoubleTag.ValueOf(pos.X));
            posTag.Add(DoubleTag.ValueOf(pos.Z));
            tag.Put(name, posTag);
        }

        public static Vector2d ReadVector2d(CompoundTag tag, string name)
        {
            if (tag.ContainsKey(name))
            {
                var listTag = (ListTag)tag.Get(name);
                return new Vector2d(listTag.Get(0).AsDouble(), listTag.Get(1).AsDouble());
            }
            return Vector2d.ZERO;
        }

        public static void WriteVector2i(CompoundTag tag, string name, Vector2i pos)
        {
            var posTag = new ListTag();
            posTag.Add(IntTag.ValueOf(pos.X));
            posTag.Add(IntTag.ValueOf(pos.Z));
            tag.Put(name, posTag);
        }

        public static Vector2i ReadVector2i(CompoundTag tag, string name)
        {
            if (tag.ContainsKey(name))
            {
                var listTag = (ListTag)tag.Get(name);
                return new Vector2i(listTag.Get(0).AsInt(), listTag.Get(1).AsInt());
            }
            return Vector2i.ZERO;
        }

        public static void WriteVector3d(CompoundTag tag, string name, Vector3d pos)
        {
            var posTag = new ListTag();
            posTag.Add(DoubleTag.ValueOf(pos.X));
            posTag.Add(DoubleTag.ValueOf(pos.Y));
            posTag.Add(DoubleTag.ValueOf(pos.Z));
            tag.Put(name, posTag);
        }

        public static Vector3d ReadVector3d(CompoundTag tag, string name)
        {
            if (tag.ContainsKey(name))
            {
                var listTag = (ListTag)tag.Get(name);
                return new Vector3d(
                    listTag.Get(0).AsDouble(),
                    listTag.Get(1).AsDouble(),
                    listTag.Get(2).AsDouble());
            }
            return Vector3d.ZERO;
        }

        public static void WriteVector3i(CompoundTag tag, string name, Vector3i pos)
        {
            var posTag = new ListTag();
            posTag.Add(IntTag.ValueOf(pos.X));
            posTag.Add(IntTag.ValueOf(pos.Y));
            posTag.Add(IntTag.ValueOf(pos.Z));
            tag.Put(name, posTag);
        }

        public static Vector3i ReadVector3i(CompoundTag tag, string name)
        {
            if (tag.ContainsKey(name))
            {
                var listTag = (ListTag)tag.Get(name);
                return new Vector3i(
                    listTag.Get(0).AsInt(),
                    listTag.Get(1).AsInt(),
                    listTag.Get(2).AsInt());
            }
            return Vector3i.ZERO;
        }

        private static int[] MsbLsbToIntArray(long msb, long lsb)
        {
            return new[]
            {
                (int)(msb >> 32),
                (int)msb,
                (int)(lsb >> 32),
                (int)lsb
            };
        }

        private static int[] UuidToIntArray(NbtUUID id)
        {
            return MsbLsbToIntArray(id.GetMostSignificantBits(), id.GetLeastSignificantBits());
        }

        private static NbtUUID UuidFromIntArray(int[] values)
        {
            return new NbtUUID(
                ((long)values[0] << 32) | (values[1] & 0xFFFFFFFFL),
                ((long)values[2] << 32) | (values[3] & 0xFFFFFFFFL));
        }

        public static void WriteUUID(CompoundTag tag, string name, NbtUUID id)
        {
            tag.Put(name, IntArrayTag.ValueOf(UuidToIntArray(id).ToList()));
        }

        public static NbtUUID ReadUUID(CompoundTag tag, string name)
        {
            if (!tag.ContainsKey(name))
            {
                return NbtUUID.ZERO;
            }
            return UuidFromIntArray(tag.Get(name).AsIntArray().ToArray());
        }
    }
}