using UnityEngine;
using System.Collections.Generic;

public class Fortification : MonoBehaviour
{
    // Global list so Siege enemies can easily find targets
    public static List<Fortification> AllFortifications = new List<Fortification>();

    [Header("Health Settings")]
    public float maxHealth = 500f;
    public float currentHealth;

    [Header("Visual Stages (Assign GameObjects)")]
    public GameObject fullyBuiltModel;
    public GameObject damagedModel;
    public GameObject ruinedModel;

    private Collider barrierCollider;
    public bool IsDestroyed => currentHealth <= 0;

    void Awake()
    {
        barrierCollider = GetComponent<Collider>();
    }

    void OnEnable() 
    { 
        AllFortifications.Add(this); 
        currentHealth = maxHealth; 
        UpdateVisuals(); 
    }

    void OnDisable() 
    { 
        AllFortifications.Remove(this); 
    }

    public void TakeDamage(float amount)
    {
        if (IsDestroyed) return;
        
        currentHealth -= amount;
        UpdateVisuals();
    }

    public void Repair(float amount)
    {
        if (currentHealth >= maxHealth) return;

        currentHealth += amount;
        currentHealth = Mathf.Min(currentHealth, maxHealth); // Cap at max
        UpdateVisuals();
    }

    private void UpdateVisuals()
    {
        // Swap models based on health thresholds
        fullyBuiltModel.SetActive(currentHealth > maxHealth * 0.5f);
        damagedModel.SetActive(currentHealth > 0 && currentHealth <= maxHealth * 0.5f);
        ruinedModel.SetActive(IsDestroyed);
        
        // When destroyed, turn the collider into a trigger so the horde can pour through the rubble
        if (barrierCollider != null)
        {
            barrierCollider.isTrigger = IsDestroyed;
        }
    }
}