using System.Numerics;
using System.Collections.ObjectModel;
using Raylib_cs;

namespace OnekoOnline;

abstract class Oneko : Drawable
{
    public readonly Bitmap SpriteSheet;
    public Rectangle Sprite {get; protected set;} = Idle1;
    protected Color ColorTint = Color.White;

    protected byte FrameId {
        get => (byte)Array.IndexOf(FrameArray, Sprite);
        set => Sprite = FrameArray[value];
    }

    public string Name = "Oneko";

    protected static List<Oneko> allNekos = [];
    public static ReadOnlyCollection<Oneko> AllNekos => allNekos.AsReadOnly();

    protected readonly static Image FallbackImg = Raylib.LoadImageFromMemory(".png", EmbeddedResources.GetResource("nekos.oneko.png"));

    public Oneko() : base()
    {
        Size = new(32,32);
        Position = new(320/2, 240/2);

        string SpriteSheetPath = OnekoOnline.Config.GetValue("SpriteSheetPath", "nekos/oneko.png");

        if (File.Exists(SpriteSheetPath) && new FileInfo(SpriteSheetPath).Length < 128*256*3) {
            #if DEBUG
                //Bitmap Serialization test
                using Bitmap SerializeTest = Bitmap.FromPNGMemory(File.ReadAllBytes(SpriteSheetPath), 256, 128);
                SpriteSheet = Bitmap.Deserialize(SerializeTest.Serialize());
            #else
                SpriteSheet = Bitmap.FromPNGMemory(File.ReadAllBytes(SpriteSheetPath), 256, 128);
            #endif
        } else {
            Console.WriteLine("Path to spritesheet was invalid or the file was too big, using the default.");
            SpriteSheet = new Bitmap(Raylib.ImageCopy(FallbackImg), 256, 128);
        }

        allNekos.Add(this);
    }

    public Oneko(Bitmap spriteSheet) : base()
    {
        Size = new(32,32);
        Position = new(0, 0);
        SpriteSheet = spriteSheet;

        allNekos.Add(this);
    }

    public override void Draw()
    {
        //Nametag
        Vector2 NametagPosition = new(Position.X-(Name.Length*3)+4, Position.Y-28);
        Raylib.DrawTextEx(OnekoOnline.DefaultFont, Name, NametagPosition+Directions.Down, 11, 0, Color.Black); //Shadow
        Raylib.DrawTextEx(OnekoOnline.DefaultFont, Name, NametagPosition, 11, 0, Color.White);

        //The neko
        Raylib.DrawTexturePro(SpriteSheet.Texture, Sprite, new Rectangle(Position.X, Position.Y, Size.X, Size.Y), Size/2, Rotation, ColorTint);
    }

    protected override void Unload()
    {
        allNekos.Remove(this);
        SpriteSheet.Dispose();
    }

    protected struct OnekoAnimation(Rectangle frame1, Rectangle frame2, byte animSpeed)
    {
        public byte AnimSpeed = animSpeed;
        Rectangle Frame1 = frame1;
        Rectangle Frame2 = frame2;

        public readonly Rectangle GetFrame(int frame) {
            return (frame % 2 == 0) ? Frame1 : Frame2;
        }
    }

    static protected OnekoAnimation GetDirectionalRun(Vector2 direction)
    {
        direction = Vector2.Normalize(direction);
        
        Vector2 nearestDir = Directions.Up;
        float nearestDistance = 10f;
        foreach (Vector2 dir in RunDirections.Keys) {
            float distanceCheck = Vector2.Distance(direction, dir);
            if (distanceCheck < nearestDistance) {
                nearestDir = dir;
                nearestDistance = distanceCheck;
            }
        }

        return RunDirections[nearestDir];
    }

    static protected readonly Rectangle Idle1 = new(32*3, 32*3, 32, 32);
    static protected readonly Rectangle Alert1 = new(32*7, 32*3, 32, 32);
    static protected readonly Rectangle Yawn1 = new(32*3, 32*2, 32, 32);
    static protected readonly Rectangle Clean1 = new(32*7, 0, 32, 32);
    static protected readonly Rectangle Scratch1 = new(32*5, 0, 32, 32);
    static protected readonly Rectangle Scratch2 = new(32*6, 0, 32, 32);
    static protected readonly Rectangle Sleep1 = new(32*2, 0, 32, 32);
    static protected readonly Rectangle Sleep2 = new(32*2, 32, 32, 32);
    static protected readonly Rectangle RunUp1 = new(32, 32*3, 32, 32);
    static protected readonly Rectangle RunUp2 = new(32, 32*2, 32, 32);
    static protected readonly Rectangle RunUpLeft1 = new(32, 32, 32, 32);
    static protected readonly Rectangle RunUpLeft2 = new(32, 0, 32, 32);
    static protected readonly Rectangle RunLeft1 = new(32*4, 32*3, 32, 32);
    static protected readonly Rectangle RunLeft2 = new(32*4, 32*2, 32, 32);
    static protected readonly Rectangle RunDownLeft1 = new(32*6, 32, 32, 32);
    static protected readonly Rectangle RunDownLeft2 = new(32*5, 32*3, 32, 32);
    static protected readonly Rectangle RunDown1 = new(32*7, 32*2, 32, 32);
    static protected readonly Rectangle RunDown2 = new(32*6, 32*3, 32, 32);
    static protected readonly Rectangle RunDownRight1 = new(32*5, 32*2, 32, 32);
    static protected readonly Rectangle RunDownRight2 = new(32*5, 32, 32, 32);
    static protected readonly Rectangle RunRight1 = new(32*3, 32, 32, 32);
    static protected readonly Rectangle RunRight2 = new(32*3, 0, 32, 32);
    static protected readonly Rectangle RunUpRight1 = new(0, 32*3, 32, 32);
    static protected readonly Rectangle RunUpRight2 = new(0, 32*2, 32, 32);
    static protected readonly Rectangle ScratchUp1 = new(0, 0, 32, 32);
    static protected readonly Rectangle ScratchUp2 = new(0, 32, 32, 32);
    static protected readonly Rectangle ScratchLeft1 = new(32*4, 0, 32, 32);
    static protected readonly Rectangle ScratchLeft2 = new(32*4, 32, 32, 32);
    static protected readonly Rectangle ScratchDown1 = new(32*7, 32, 32, 32);
    static protected readonly Rectangle ScratchDown2 = new(32*6, 32*2, 32, 32);
    static protected readonly Rectangle ScratchRight1 = new(32*2, 32*2, 32, 32);
    static protected readonly Rectangle ScratchRight2 = new(32*2, 32*3, 32, 32);

    static protected readonly OnekoAnimation Idle = new(Idle1, Idle1, 1);
    static protected readonly OnekoAnimation Alert = new(Alert1, Alert1, 1);
    static protected readonly OnekoAnimation Yawn = new(Yawn1, Yawn1, 1);
    static protected readonly OnekoAnimation Clean = new(Idle1, Clean1, 1);
    static protected readonly OnekoAnimation ScratchSelf = new(Scratch1, Scratch2, 1);
    static protected readonly OnekoAnimation Sleep = new(Sleep1, Sleep2, 10);
    static protected readonly OnekoAnimation RunUp = new(RunUp1, RunUp2, 1);
    static protected readonly OnekoAnimation RunUpLeft = new(RunUpLeft1, RunUpLeft2, 1);
    static protected readonly OnekoAnimation RunLeft = new(RunLeft1, RunLeft2, 1);
    static protected readonly OnekoAnimation RunDownLeft = new(RunDownLeft1, RunDownLeft2, 1);
    static protected readonly OnekoAnimation RunDown = new(RunDown1, RunDown2, 1);
    static protected readonly OnekoAnimation RunDownRight = new(RunDownRight1, RunDownRight2, 1);
    static protected readonly OnekoAnimation RunRight = new(RunRight1, RunRight2, 1);
    static protected readonly OnekoAnimation RunUpRight = new(RunUpRight1, RunUpRight2, 1);
    static protected readonly OnekoAnimation ScratchUp = new(ScratchUp1, ScratchUp2, 1);
    static protected readonly OnekoAnimation ScratchLeft = new(ScratchLeft1, ScratchLeft2, 1);
    static protected readonly OnekoAnimation ScratchDown = new(ScratchDown1, ScratchDown2, 1);
    static protected readonly OnekoAnimation ScratchRight = new(ScratchRight1, ScratchRight2, 1);

    static readonly Dictionary<Vector2, OnekoAnimation> RunDirections = new() {
        {Directions.Up, RunUp},
        {Directions.Down, RunDown},
        {Directions.Left, RunLeft},
        {Directions.Right, RunRight},
        {Directions.UpLeft, RunUpLeft},
        {Directions.UpRight, RunUpRight},
        {Directions.DownRight, RunDownRight},
        {Directions.DownLeft, RunDownLeft},
    };

    static readonly Rectangle[] FrameArray = [
        Idle1, Alert1, Yawn1, Clean1,
        Scratch1, Scratch2, Sleep1, Sleep2,
        RunUp1,RunUpLeft1, RunLeft1, RunDownLeft1, RunDown1, RunDownRight1, RunRight1, RunUpRight1,
        RunUp2,RunUpLeft2, RunLeft2, RunDownLeft2, RunDown2, RunDownRight2, RunRight2, RunUpRight2,
        ScratchUp1, ScratchLeft1, ScratchDown1, ScratchRight1,
        ScratchUp2, ScratchLeft2, ScratchDown2, ScratchRight2
    ];

    static readonly OnekoAnimation[] AnimationArray = [
        Idle, Alert, Yawn, Clean, ScratchSelf, Sleep,
        RunUp,RunUpLeft, RunLeft, RunDownLeft, RunDown, RunDownRight, RunRight, RunUpRight,
        ScratchUp, ScratchLeft, ScratchDown, ScratchRight
    ];
}