using System.Collections;
using UnityEngine;
using UnityEngine.Events;

[DisallowMultipleComponent]
public sealed class MapImpactMarkerView : MonoBehaviour
{
    [SerializeField] private MapCoordinateSystem coordinateSystem;
    [SerializeField, Min(0.01f)] private float markerLength = 0.35f;
    [SerializeField, Min(0.005f)] private float markerThickness = 0.035f;
    [SerializeField, Min(0f)] private float surfaceOffset = 0.025f;
    [SerializeField, Min(0.1f)] private float lifetime = 5f;
    [SerializeField] private Color hitColor = new(1f, 0.1f, 0.05f, 1f);
    [SerializeField] private Color missColor = new(1f, 0.75f, 0f, 1f);
    [SerializeField] private bool showMisses = true;
    [SerializeField] private UnityEvent hitMarked;
    [SerializeField] private UnityEvent missMarked;

    public void Configure(MapCoordinateSystem coordinates) => coordinateSystem = coordinates;

    public void Show(MapShotResultState result)
    {
        if (coordinateSystem == null || (!result.Hit && !showMisses))
            return;

        CreateMarker(result.Coordinates, result.Hit ? hitColor : missColor);
        if (result.Hit)
            hitMarked?.Invoke();
        else
            missMarked?.Invoke();
    }

    private void CreateMarker(Vector2 coordinates, Color color)
    {
        Vector3 horizontal = coordinateSystem.BottomRight.position -
            coordinateSystem.BottomLeft.position;
        Vector3 vertical = coordinateSystem.TopLeft.position -
            coordinateSystem.BottomLeft.position;
        Vector3 normal = Vector3.Cross(horizontal, vertical).normalized;
        if (normal.sqrMagnitude < 0.5f)
            normal = transform.forward;

        GameObject marker = new($"Impact {coordinates.x:0.0}, {coordinates.y:0.0}");
        marker.transform.SetParent(transform, true);
        marker.transform.SetPositionAndRotation(
            coordinateSystem.CoordinatesToWorldPosition(coordinates) + normal * surfaceOffset,
            Quaternion.LookRotation(normal, vertical.normalized));

        CreateBar(marker.transform, 45f, color);
        CreateBar(marker.transform, -45f, color);
        StartCoroutine(DestroyAfterLifetime(marker));
    }

    private void CreateBar(Transform parent, float angle, Color color)
    {
        GameObject bar = GameObject.CreatePrimitive(PrimitiveType.Cube);
        bar.name = "Marker Bar";
        bar.transform.SetParent(parent, false);
        bar.transform.localRotation = Quaternion.Euler(0f, 0f, angle);
        bar.transform.localScale = new Vector3(
            markerLength, markerThickness, markerThickness);
        Collider collider = bar.GetComponent<Collider>();
        if (collider != null)
            Destroy(collider);
        Renderer renderer = bar.GetComponent<Renderer>();
        if (renderer != null)
            renderer.material.color = color;
    }

    private IEnumerator DestroyAfterLifetime(GameObject marker)
    {
        yield return new WaitForSeconds(lifetime);
        if (marker != null)
            Destroy(marker);
    }
}