using AlienAttack.MonoGame.Things.Bullets;
using Microsoft.Xna.Framework;

namespace AlienAttack.MonoGame.Things.Enemies.Mines;

public class RedMine(int x, int y) : Mine(x, y)
{
    protected bool IsCharging = false;
    protected Vector2 TargetCenter;
    protected override string CoverColor => "Red";
    protected override float ExplodeRadius => 18f;
    protected override int MaxHealth => 10;

    // Tunables
    private const float DetectRange = 200f;
    private const float ChargeSpeed = 5f;      // try 3.5–6.0

    protected override void OnUpdate(SpriteUpdateContext context)
    {
        // If not charging yet, see if we should lock on
        if (!IsCharging)
        {
            if (DistanceToPlayer > DetectRange)
                return;

            Charge(context.Player);
        }

        // We are charging: steer directly toward the locked target point
        Vector2 toTarget = TargetCenter - new Vector2(XPosition + Origin.X, YPosition + Origin.Y);

        float dist = toTarget.Length();

        if (dist <= ExplodeRadius)
        {
            IsDead = true;

            // Optionally: explode at target (top-left adjustment)
            XPosition = TargetCenter.X - Origin.X;
            YPosition = TargetCenter.Y - Origin.Y;

            SpawnExplosion(context); // uses current XPosition/YPosition
            return;
        }

        // Normalize direction (avoid NaN if dist == 0)
        Vector2 dir = toTarget / dist;

        // Set velocities for base.Update to apply next frame
        XVelocity = dir.X * ChargeSpeed;
        YVelocity = dir.Y * ChargeSpeed;

        // Optional: if you want it to stop “floating down” once charging
        // (it will anyway, because we overwrite YVelocity)
    }

    public override void OnCollision(SpriteCollisionContext context)
    {
        base.OnCollision(context);

        if (context.Sprite is Bullet bullet && bullet.Owner is Player player && IsCharging == false)
        {
            Charge(player);
        }
    }

    private void Charge(Sprite target)
    {
        IsCharging = true;

        float x = target.XPosition + target.Origin.X;
        float y = target.YPosition + target.Origin.Y;

        TargetCenter = new Vector2(x, y);

        RotationSpeed *= ChargeSpeed;
    }
}