using System.Collections;
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; } = 100;
    [Export]
    public int MaxHealth { get; set; } = 100;
    [Export]
    public int MaxSpeed { get; set;} = 300;
    [Export]
    public int MainSpeed { get; set; } = 20;
    [Export]
    public int StrafeSpeed { get; set; } = 5;
    [Export]
    public float RotationSpeed { get; set; } = 2f;
    [Export]
    public ShipType type;
    [Export]
    public ShipFaction faction;

    public Sprite2D Sprite = new Sprite2D();

    public Node2D LaserSpawn = null;

    protected string spritePath = "";

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


    public virtual void ShootLaser()
    {
        Node2D Laser = LaserScene.Instantiate<Node2D>();
        Laser.Position = LaserSpawn.GlobalPosition;
        Laser.Rotation = Rotation;
        EmitSignal(SignalName.LaserShot, Laser);
    }

    public 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.INTERCEPTOR:
            MaxSpeed = 450;
            MainSpeed = 35;
            StrafeSpeed = 10;
            RotationSpeed = 4f;
            MaxHealth = 75;
            break;

            case ShipType.GUARDIAN:
            MaxSpeed = 200;
            MainSpeed = 10;
            StrafeSpeed = 3;
            RotationSpeed = 1f;
            MaxHealth = 250;
            break;
        }
    }

    public virtual void ShipDamage(int damage)
    {
        Health -= damage;
        if (Health < 0){ Health = 0;}
    }

    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();
    }
}