using System.Collections.Generic;
using UnityEngine;

[DisallowMultipleComponent]
public sealed class MapRadarController : MonoBehaviour
{
    [Header("Radar Settings")]
    [SerializeField, Min(0f)] private float cooldown = 5f;

    [Header("Radar State (Runtime)")]
    [SerializeField] private float cooldownRemaining;

    private readonly List<GameObject> radarMarks = new();
    private MapCoordinateSystem coordinateSystem;
    private MapTarget radarMarkPrefab;

    public float Cooldown => Mathf.Max(0f, cooldown);
    public float CooldownRemaining => cooldownRemaining;
    public bool IsReady => cooldownRemaining <= 0f;

    private void OnValidate() => cooldown = Mathf.Max(0f, cooldown);

    public void Configure(
        MapCoordinateSystem newCoordinateSystem,
        MapTarget newRadarMarkPrefab)
    {
        coordinateSystem = newCoordinateSystem;
        radarMarkPrefab = newRadarMarkPrefab;
    }

    public void SetCooldownRemaining(float seconds) =>
        cooldownRemaining = Mathf.Max(0f, seconds);

    public void ApplyRadarMarks(IReadOnlyList<Vector2> coordinates)
    {
        if (coordinateSystem == null || !coordinateSystem.HasValidCorners() ||
            radarMarkPrefab == null)
        {
            return;
        }

        EnsureRadarMarkCount(coordinates.Count);
        for (int index = 0; index < radarMarks.Count; index++)
        {
            bool active = index < coordinates.Count;
            GameObject radarMark = radarMarks[index];
            radarMark.SetActive(active);
            if (active)
            {
                radarMark.name = $"Radar Mark {index + 1}";
                radarMark.transform.position =
                    coordinateSystem.CoordinatesToWorldPosition(coordinates[index]);
            }
        }
    }

    private void EnsureRadarMarkCount(int requiredCount)
    {
        while (radarMarks.Count < requiredCount)
        {
            GameObject radarMark = Instantiate(radarMarkPrefab.gameObject, transform);
            PrepareRadarMark(radarMark);
            radarMarks.Add(radarMark);
        }
    }

    private static void PrepareRadarMark(GameObject radarMark)
    {
        MapTarget target = radarMark.GetComponent<MapTarget>();
        if (target != null)
            target.enabled = false;

        foreach (Collider targetCollider in radarMark.GetComponentsInChildren<Collider>(true))
            targetCollider.enabled = false;

        foreach (Renderer targetRenderer in radarMark.GetComponentsInChildren<Renderer>(true))
            targetRenderer.enabled = true;
    }
}