using Godot;
using System;

public partial class player : CharacterBody2D
{   
    [Signal]
    public delegate void LaserShotEventHandler(Area2D Laser);
    [Export]
    public Vector2 ScreenSize;
    [Export]
    public int MaxSpeed { get; set;} = 300;
    [Export]
    public int MainSpeed { get; set; } = 10;
    [Export]
    public int StrafeSpeed { get; set; } = 4;
    [Export]
    public float RotationSpeed { get; set; } = 2f;

    public Node2D LaserSpawn = null;

    private int _rotationDirection;

    private readonly PackedScene LaserScene = GD.Load<PackedScene>("res://scenes/laser.tscn");
    public void GetInput()
    {
        /*LookAt(GetGlobalMousePosition()); //used for mouse-based rotation and movement
        Velocity = Transform.X * Input.GetAxis("down", "up") * Speed;
        */
        
        // Movement, could probably move into its own methods instead of GetInput()
        _rotationDirection = (int)Input.GetAxis("left", "right");
        Velocity += (Transform.X * Input.GetAxis("strafe_left", "strafe_right") * StrafeSpeed) + (Transform.Y * Input.GetAxis("up", "down") * MainSpeed);
        Velocity = Velocity.LimitLength(MaxSpeed);

        if(Input.GetAxis("strafe_left", "strafe_right") == 0){
            Velocity = Velocity.MoveToward(Vector2.Zero, 1.5f);
        }
        else if(Input.GetAxis("down", "up") == 0){
            Velocity = Velocity.MoveToward(Vector2.Zero, 1.5f);
        }
    }

    public void ShootLaser()
    {
        Node2D Laser = LaserScene.Instantiate<Node2D>();
        Laser.Position = LaserSpawn.Position;
        Laser.Rotation = Rotation;
        GD.Print("shoooot");
        EmitSignal(SignalName.LaserShot, Laser);
        //GetParent().AddChild(Laser);
        AddChild(Laser);
    }

    public override void _Ready()
    {
        GD.Print(GetViewportRect().Size);
        ScreenSize = GetViewportRect().Size;
        LaserSpawn = GetNode<Node2D>("LaserSpawn");
    }

    public override void _Process(double delta)
    {
        if(Input.IsActionJustPressed("shoot"))
        {
            ShootLaser();
        }
    }
    public override void _PhysicsProcess(double delta)
    { // every frame
        GetInput();
        Rotation += _rotationDirection * RotationSpeed * (float)delta;
        Velocity.LimitLength(MaxSpeed);
        
        MoveAndSlide();

        if (Position.Y < 0) {Position = new Vector2(Position.X, ScreenSize.Y);}
        if (Position.Y > ScreenSize.Y) {Position = new Vector2(Position.X, 0);}
        if (Position.X < 0) { Position = new Vector2(ScreenSize.X, Position.Y);}
        if (Position.X > ScreenSize.X) { Position = new Vector2(0, Position.Y);}
    }
}