using System;
using System.Collections.Generic;
using System.Linq;
using Gamecraft.Wires;
using Gamecraft.Wires.ChannelsCommon;
using GamecraftModdingAPI;
using GamecraftModdingAPI.Blocks;
using GamecraftModdingAPI.Commands;
using GamecraftModdingAPI.Players;
using GamecraftModdingAPI.Utility;
using IllusionPlugin;
using RobocraftX.CommandLine.Custom;
using Unity.Mathematics;
using uREPL;
using Main = GamecraftModdingAPI.Main;

namespace BlockMod
{
    public class BlockMod : IPlugin
    {
        private Block[] blocks = new Block[0];
        private Block refBlock;

        public void OnApplicationStart()
        {
            Main.Init();
            GameClient.SetDebugInfo("BlockModInfo", GetBlockInfo);
            RegisterBlockCommand("scaleBlocks",
                "Scales the blocks you're looking at, relative to current size (current scale * new scale)." +
                " The block you're looking at stays where it is, everything else is moved next to it.",
                (scaleX, scaleY, scaleZ, blocks, refBlock) =>
                {
                    if (!GameState.IsBuildMode()) return; //Scaling & positioning is weird in simulation
                    if (CheckNoBlocks(blocks)) return;
                    // ReSharper disable once PossibleNullReferenceException
                    float3 reference = refBlock.Position;
                    float3 scale = new float3(scaleX, scaleY, scaleZ);
                    foreach (var block in blocks)
                    {
                        block.Scale *= scale;
                        block.Position = reference + (block.Position - reference) * scale;
                    }

                    Logging.CommandLog("Blocks scaled.");
                });
            RegisterBlockCommand("scaleIndividually", "Scales the blocks you're looking at, but doesn't move them." +
                                                      "The scale is relative, 1 means no change. Look at a block previously scaled to scale all of the blocks that were connected to it.",
                (scaleX, scaleY, scaleZ, blocks, refBlock) =>
                {
                    if (!GameState.IsBuildMode()) return; //Scaling & positioning is weird in simulation
                    float3 scale = new float3(scaleX, scaleY, scaleZ);
                    foreach (var block in blocks)
                        block.Scale *= scale;
                });
            RegisterBlockCommand("moveBlocks", "Moves the blocks around.", (x, y, z, blocks, refBlock) =>
            {
                if (GameState.IsBuildMode())
                    foreach (var block in blocks)
                        block.Position += new float3(x, y, z);
                else if (GameState.IsSimulationMode())
                    foreach (var body in GetSimBodies(blocks))
                        body.Position += new float3(x, y, z);
            });
            RegisterBlockCommand("colorBlocks", "Colors the blocks you're looking at",
                (color, darkness, blocks, refBlock) =>
                {

                    if (!Enum.TryParse(color, true, out BlockColors clr))
                    {
                        Logging.CommandLogWarning("Color " + color + " not found");
                    }

                    foreach (var block in blocks)
                        block.Color = new BlockColor {Color = clr, Darkness = darkness};
                });

            CommandBuilder.Builder("selectBlocksLookedAt",
                    "Selects blocks (1 or more) to change. Only works in build mode, however the blocks can be changed afterwards." +
                    " Paramter: whether one (true) or all connected (false) blocks should be selected.")
                .Action<bool>(single =>
                {
                    refBlock = new Player(PlayerType.Local).GetBlockLookedAt();
                    blocks = single ? new[] {refBlock} : refBlock?.GetConnectedCubes() ?? new Block[0];
                    Logging.CommandLog(blocks == null ? "Selection cleared." : blocks.Length + " blocks selected.");
                }).Build();
            CommandBuilder.Builder("selectBlocksWithID", "Selects blocks with a specific object ID.")
                .Action<char>(id =>
                    blocks = (refBlock = ObjectIdentifier.GetByID(id).FirstOrDefault())?.GetConnectedCubes() ??
                             new Block[0]).Build();
            CommandBuilder.Builder("selectSelectedBlocks", "Selects blocks that are box selected by the player.")
                .Action(() =>
                {
                    blocks = new Player(PlayerType.Local).GetSelectedBlocks();
                    refBlock = blocks.Length > 0 ? blocks[0] : null;
                }).Build();

            ConsoleCommands.RegisterWithChannel("selectSendSignal", ch => { }, ChannelType.Object,
                "Sends a signal for selecting a given object ID for a command block.");

            RegisterBlockCommand("pushBlocks", "Adds velocity to the selected blocks. Only works in simulation.",
                (x, y, z, blocks, refBlock) =>
                {
                    foreach (var block in GetSimBodies(blocks))
                        block.Velocity += new float3(x, y, z);
                });
            RegisterBlockCommand("pushRotateBlocks",
                "Adds angular velocity to the selected blocks. Only works in simulation.",
                (x, y, z, blocks, refBlock) =>
                {
                    foreach (var block in GetSimBodies(blocks))
                        block.AngularVelocity += new float3(x, y, z);
                });
            CommandBuilder.Builder("pushPlayer", "Adds velocity to the player.")
                .Action<float, float, float>((x, y, z) =>
                {
                    new Player(PlayerType.Local).Velocity += new float3(x, y, z);
                }).Build();
            CommandBuilder.Builder("pushRotatePlayer", "Adds angular velocity to the player.")
                .Action<float, float, float>((x, y, z) =>
                {
                    new Player(PlayerType.Local).AngularVelocity += new float3(x, y, z);
                }).Build();
        }

        private string GetBlockInfo()
        {
            if (GameState.IsBuildMode())
                return GetBlockInfoInBuildMode();
            if (GameState.IsSimulationMode())
                return GetBodyInfoInSimMode();

            return "Switching modes...";
        }

        private static string GetBlockInfoInBuildMode()
        {
            var block = new Player(PlayerType.Local).GetBlockLookedAt();
            if (block == null) return "";
            float3 pos = block.Position;
            float3 rot = block.Rotation;
            float3 scale = block.Scale;
            return $"Block: {block.Type} at {pos.x:F} {pos.y:F} {pos.z:F}\n" +
                   $"- Rotation: {rot.x:F}° {rot.y:F}° {rot.z:F}°\n" +
                   $"- Color: {block.Color.Color} darkness: {block.Color.Darkness}\n" +
                   $"- Scale: {scale.x:F} {scale.y:F} {scale.z:F}\n" +
                   $"- Label: {block.Label}\n" +
                   $"- ID: {block.Id}";
        }

        private static string GetBodyInfoInSimMode()
        {
            var body = new Player(PlayerType.Local).GetSimBodyLookedAt();
            if (body == null) return GetBlockInfoInBuildMode();
            float3 pos = body.Position;
            float3 rot = body.Rotation;
            float3 vel = body.Velocity;
            float3 ave = body.AngularVelocity;
            float3 com = body.CenterOfMass;
            return $"Body at {pos.x:F} {pos.y:F} {pos.z:F}\n" +
                   $"- Rotation: {rot.x:F}° {rot.y:F}° {rot.z:F}°\n" +
                   $"- Velocity: {vel.x:F} {vel.y:F} {vel.z:F}\n" +
                   $"- Angular velocity: {ave.x:F} {ave.y:F} {ave.z:F}\n" +
                   $"- {(body.Static ? "Static body" : $"Mass: {body.Mass:F} center: {com.x:F} {com.y:F} {com.z:F}")}";
        }

        private bool CheckNoBlocks(Block[] blocks)
        {
            if (blocks.Length == 0)
            {
                Logging.CommandLogWarning("No blocks selected. Use selectBlocks first.");
                return true;
            }

            return false;
        }

        private IEnumerable<SimBody> GetSimBodies(Block[] blocks)
            => blocks.Select(block => block.GetSimBody()).Distinct();

        private Block[] SelectBlocks(byte id)
        {
            var blocks = ObjectIdentifier.GetBySimID(id).SelectMany(block => block.GetConnectedCubes()).ToArray();
            return blocks;
        }

        private Block[] SelectBlocks(char id)
        {
            var blocks = ObjectIdentifier.GetByID(id).SelectMany(oid => oid.GetConnectedCubes())
                .ToArray();
            return blocks;
        }

        private void RegisterBlockCommandInternal(string name, string desc, Action<string, Block[], Block> action)
        {
            RuntimeCommands.Register<string>(name, a1 =>
            {
                action(a1, blocks, refBlock);
            }, desc);
            ConsoleCommands.RegisterWithChannel<string>(name, (a1, ch) =>
            {
                Console.WriteLine($"Command {name} with args {a1} and channel {ch} executing");
                var blks = SelectBlocks(ch);
                action(a1, blks, blks[0]);
            }, ChannelType.Object, desc);
        }

        private void RegisterBlockCommand(string name, string desc, Action<float, float, float, Block[], Block> action)
        {
            RegisterBlockCommandInternal(name, desc, (args, bs, b) =>
            {
                var argsa = args.Split(' ');
                if (argsa.Length < 3)
                {
                    Log.Error("Too few arguments. Needed arguments are: <x> <y> <z> and [id] is optional.");
                    return;
                }

                if (!float.TryParse(argsa[0], out float x) || !float.TryParse(argsa[1], out float y) ||
                    !float.TryParse(argsa[2], out float z))
                {
                    Log.Error("Could not parse arguments as floats.");
                    return;
                }

                if (argsa.Length > 3)
                {
                    if (argsa[3].Length == 0)
                    {
                        Log.Error("Missing channel.");
                        return;
                    }

                    var blocks = SelectBlocks(argsa[3][0]);
                    if (CheckNoBlocks(blocks)) return;
                    action(x, y, z, blocks, blocks[0]);
                }
                else if (!CheckNoBlocks(bs))
                    action(x, y, z, bs, b);
            });
        }

        private void RegisterBlockCommand(string name, string desc, Action<string, byte, Block[], Block> action)
        {
            RegisterBlockCommandInternal(name, desc, (args, bs, b) =>
            {
                var argsa = args.Split(' ');
                if (argsa.Length < 2)
                {
                    Log.Error("Too few arguments. Needed arguments are: <color> <darkness> and [id] is optional.");
                    return;
                }

                if (!byte.TryParse(argsa[1], out byte darkness))
                {
                    Log.Error("Could not parse color darkness.");
                    return;
                }

                if (argsa.Length > 2)
                {
                    if (argsa[2].Length == 0)
                    {
                        Log.Error("Missing channel.");
                        return;
                    }

                    var blocks = SelectBlocks(argsa[2][0]);
                    if (CheckNoBlocks(blocks)) return;
                    action(argsa[0], darkness, blocks, blocks[0]);
                }
                else if(!CheckNoBlocks(bs))
                    action(argsa[0], darkness, bs, b);
            });
        }

        public void OnApplicationQuit()
        {
        }

        public void OnLevelWasLoaded(int level)
        {
        }

        public void OnLevelWasInitialized(int level)
        {
        }

        public void OnUpdate()
        {
        }

        public void OnFixedUpdate()
        {
        }

        public string Name { get; } = "BlockMod";
        public string Version { get; } = "v1.0.0";
    }
}