using Godot;

public partial class ship : CharacterBody2D
{
    public enum ShipType { FIGHTER, INTERCEPTOR, GUARDIAN }
    
    public enum ShipFaction {PLAYER, FRIENDLY, ENEMY, ACE}

    [Signal]
    public delegate void LaserShotEventHandler(Area2D Laser);

    //[Export]
    //public Vector2 ScreenSize;
    [Export]
    public int Health { get; set; }
    [Export]
    public int MaxHealth { get; set; }
    [Export]
    public int MaxSpeed { get; set;}
    [Export]
    public int MainSpeed { get; set; }
    [Export]
    public int StrafeSpeed { get; set; }
    [Export]
    public float RotationSpeed { get; set; }
    [Export]
    public int Damage {get; set; }
    [Export]
    public float FireCooldown { get; set; }
    [Export]
    public ShipType type;
    [Export]
    public ShipFaction Faction;

    public Sprite2D Sprite = new Sprite2D();

    public Node2D LaserSpawn = null;
    
    protected float fireTimer = 0f;

    public string spritePath = "";

    protected int RotationDirection;
    protected readonly PackedScene LaserScene = GD.Load<PackedScene>("res://scenes/laser.tscn");


    public virtual void ShootLaser()
    {
        //GD.Print(Name, ": firing laser");

        Laser laser = LaserScene.Instantiate<Laser>();
        laser.Position = LaserSpawn.GlobalPosition + -Transform.Y * 25f;
	    laser.Shooter = this;
        laser.Rotation = Rotation;
        EmitSignal(SignalName.LaserShot, laser);
    }

    protected virtual void SetupVisual()
    {
        Sprite = GetNode<Sprite2D>("ShipSprite");
		spritePath = ""; // Have to initialise as "" because of switch statements

		if (Faction == ShipFaction.PLAYER)
        {
            switch (type)
		    {
			    case ShipType.FIGHTER:
			    spritePath = "res://assets/Ships/Fighters/Player/Fighter/";
			    break;
    
			    case ShipType.INTERCEPTOR:
			    spritePath = "res://assets/Ships/Fighters/Player/Interceptor/";
			    break;

			    case ShipType.GUARDIAN:
			    spritePath = "res://assets/Ships/Fighters/Player/Guardian/";
			    break; 
		    }
        }
        else if (Faction == ShipFaction.FRIENDLY)
        {
            switch (type)
            {
			    case ShipType.FIGHTER:
			    spritePath = "res://assets/Ships/Fighters/Friendly/friendlyFighter.png/";
			    break;
    
			    case ShipType.INTERCEPTOR:
			    spritePath = "res://assets/Ships/Fighters/Friendly/friendlyInterceptor.png/";
			    break;

			    case ShipType.GUARDIAN:
			    spritePath = "res://assets/Ships/Fighters/Friendly/friendlyGuardian.png/";
			    break;                
            }
        }
        
        else if (Faction == ShipFaction.ENEMY)
        {
            switch (type)
            {
            	case ShipType.FIGHTER:
			    spritePath = "res://assets/Ships/Fighters/Enemy/enemyFighter.png/";
			    break;
    
			    case ShipType.INTERCEPTOR:
			    spritePath = "res://assets/Ships/Fighters/Enemy/enemyInterceptor.png/";
			    break;

			    case ShipType.GUARDIAN:
			    spritePath = "res://assets/Ships/Fighters/Enemy/enemyGuardian.png/";
			    break;
            }
        }
        else if (Faction == ShipFaction.ACE)
        {
            switch (type)
            {
                case ShipType.FIGHTER:
			    spritePath = "res://assets/Ships/Fighters/Ace/aceFighter.png/";
			    break;
    
			    case ShipType.INTERCEPTOR:
			    spritePath = "res://assets/Ships/Fighters/Ace/aceInterceptor.png/";
			    break;

			    case ShipType.GUARDIAN:
			    spritePath = "res://assets/Ships/Fighters/Ace/aceGuardian.png/";
			    break;
            }
        }
        if (Faction == ShipFaction.ENEMY || Faction == ShipFaction.FRIENDLY)
        {
            Sprite.RotationDegrees = 180;
        }
        else
        {
            Sprite.RotationDegrees = 0;
        }
    }
    
    public void SetShipStats()
    {
        switch (type)
        {
            case ShipType.FIGHTER:
            Health = 100;
            MaxSpeed = 300;
            MainSpeed = 20;
            StrafeSpeed = 10;
            RotationSpeed = 2f;
            MaxHealth = 100;
            Damage = 40;
            FireCooldown = 0.6f;
            break;

            case ShipType.INTERCEPTOR:
            Health = 75;
            MaxSpeed = 450;
            MainSpeed = 35;
            StrafeSpeed = 15;
            RotationSpeed = 4f;
            MaxHealth = 75;
            Damage = 20;
            FireCooldown = 0.3f;
            break;

            case ShipType.GUARDIAN:
            Health = 200;
            MaxSpeed = 200;
            MainSpeed = 15;
            StrafeSpeed = 7;
            RotationSpeed = 1.5f;
            MaxHealth = 200;
            Damage = 60;
            FireCooldown = 1.1f;
            break;
        }
    }

    public virtual void ShipDamage(int damage)
    {
        Health -= damage;
        if (Health <= 0)
        {
	        Explode();
        }
        GD.Print(Name, " health: ", Health);
    }

    public virtual void Explode()
    {
	    GD.Print(Name, " exploded");
	    QueueFree();
    }

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

    public override void _PhysicsProcess(double delta)
    {
        // Common movement logic for all ships
        Rotation += RotationDirection * RotationSpeed * (float)delta;
        Velocity.LimitLength(MaxSpeed);
        
        MoveAndSlide();
    }
}