using System;
using System.Collections.Generic;
using System.Linq;
using Gamecraft.Wires;
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 : IEnhancedPlugin
    {
        private readonly CommandUtils _commandUtils;
        private readonly BlockSelections _blockSelections;

        public BlockMod()
        {
            _blockSelections = new BlockSelections();
            _commandUtils = new CommandUtils(_blockSelections);
        }

        public override void OnApplicationStart()
        {
            Main.Init();
            GameClient.SetDebugInfo("PlayerInfo", GetPlayerInfo);
            GameClient.SetDebugInfo("BlockModInfo", GetBlockInfo);
            _commandUtils.RegisterBlockCommand("scaleBlocks",
                "Scales the selected blocks, relative to current size (current scale * new scale)." +
                " The block you're looking at (when selected based on that) 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 (_blockSelections.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.");
                });
            _commandUtils.RegisterBlockCommand("scaleIndividually", "Scales the blocks you're looking at, but doesn't move them." +
                                                                    " The scale is relative, 1 means no change.",
                (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;
                });
            _commandUtils.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);
            });
            _commandUtils.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." +
                    " Parameter: whether one (true) or all connected (false) blocks should be selected.")
                .Action<bool>(single =>
                {
                    _blockSelections.refBlock = new Player(PlayerType.Local).GetBlockLookedAt();
                    var refBlock = _blockSelections.refBlock;
                    _blockSelections.blocks = single ? new[] {refBlock} : refBlock?.GetConnectedCubes() ?? new Block[0];
                    var blocks = _blockSelections.blocks;
                    Logging.CommandLog(blocks == null ? "Selection cleared." : blocks.Length + " blocks selected.");
                }).Build();
            CommandBuilder.Builder("selectBlocksWithID", "Selects blocks with a specific object ID.")
                .Action<char>(id =>
                    _blockSelections.blocks = (_blockSelections.refBlock = ObjectIdentifier.GetByID(id).FirstOrDefault())
                                              ?.GetConnectedCubes() ?? new Block[0]).Build();
            CommandBuilder.Builder("selectSelectedBlocks", "Selects blocks that are box selected by the player.")
                .Action(() =>
                {
                    _blockSelections.blocks = new Player(PlayerType.Local).GetSelectedBlocks();
                    _blockSelections.refBlock = _blockSelections.blocks.Length > 0 ? _blockSelections.blocks[0] : null;
                }).Build();

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

            _commandUtils.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);
                });
            _commandUtils.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 = Player.LocalPlayer.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 = Player.LocalPlayer.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;
            Cluster cluster = body.Cluster;
            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}")}\n" +
                   $"- Volume: {body.Volume:F}\n" +
                   $"- Chunk health: {body.CurrentHealth:F} / {body.InitialHealth:F} - Multiplier: {body.HealthMultiplier:F}\n" +
                   $"- Cluster health: {cluster?.CurrentHealth:F} / {cluster?.InitialHealth:F} - Multiplier: {cluster?.HealthMultiplier:F}";
        }

        private string GetPlayerInfo()
        {
            var body = Player.LocalPlayer;
            if (body == null) return GetBlockInfoInBuildMode();
            float3 pos = body.Position;
            float3 rot = body.Rotation;
            float3 vel = body.Velocity;
            float3 ave = body.AngularVelocity;
            return $"You are 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" +
                   $"- Mass: {body.Mass:F}\n" +
                   $"- Health: {body.CurrentHealth:F} / {body.InitialHealth:F}";
        }

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

        public override void OnApplicationQuit() => Main.Shutdown();

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