using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class StatusUI : MonoBehaviour
{
    public Image backgroundImage;
    public Image stunImage;
    public Text turnsText;

    private BattleParticipant battleParticipant;

    public void Init(BattleParticipant battleParticipant) {
        this.battleParticipant = battleParticipant;

        this.battleParticipant.OnStatusChanged += this.NotifyBattleStatusChanged;
    }

    // Start is called before the first frame update
    void Start()
    {
        UpdateAppearance();
    }

    public void NotifyBattleStatusChanged(BattleParticipant updatedParticipant) {
        if (updatedParticipant != this.battleParticipant) {
            throw new System.InvalidOperationException(
                "NotifyBattleStatusChanged was notified about a different participant.");
        }
        UpdateAppearance();
    }

    private void UpdateAppearance() {
        int statusCount = 0;
        if (battleParticipant.HasStatus(BattleStatus.Stun)) {
            statusCount++;
            this.stunImage.enabled = true;
            this.turnsText.enabled = true;
            this.turnsText.text = "" + battleParticipant.GetStatusAmount(BattleStatus.Stun);
        } else {
            this.stunImage.enabled = false;
            this.turnsText.enabled = false;
        }
        this.backgroundImage.enabled = (statusCount > 0);
    }
}