using UnityEngine;

public class Visibility : MonoBehaviour
{
    public Unit[] playerUnits;
    public Unit[] enemyUnits;
    public Flag enemyFlag;

    void Update()
    {
        // Update visibility of enemy units
        foreach (var enemy in enemyUnits)
        {
            if (enemy == null) continue;

            bool visible = IsVisibleToAnyPlayerUnit(enemy.transform.position);
            var sr = enemy.GetComponent<SpriteRenderer>();
            if (sr != null)
            {
                sr.enabled = visible || enemy.isTaggedOut; // Show tagged out units (they're faded anyway)
            }
        }

        // Update visibility of enemy flag (only when not carried)
        if (enemyFlag != null && enemyFlag.carriedBy == null)
        {
            bool flagVisible = IsVisibleToAnyPlayerUnit(enemyFlag.transform.position);
            var flagSr = enemyFlag.GetComponent<SpriteRenderer>();
            if (flagSr != null)
            {
                flagSr.enabled = flagVisible;
            }
        }
        else if (enemyFlag != null && enemyFlag.carriedBy != null)
        {
            // Flag is carried - always show it (it's attached to a visible unit)
            var flagSr = enemyFlag.GetComponent<SpriteRenderer>();
            if (flagSr != null)
            {
                flagSr.enabled = true;
            }
        }
    }

    bool IsVisibleToAnyPlayerUnit(Vector2 position)
    {
        foreach (var unit in playerUnits)
        {
            if (unit == null || unit.isTaggedOut) continue;

            float distance = Vector2.Distance(unit.transform.position, position);
            if (distance < Game.VisionRadius)
            {
                return true;
            }
        }
        return false;
    }
}