using System.Collections.Generic;
using UnityEngine;

public class BattleEventListener : MonoBehaviour
{
	[HideInInspector]
	public BattleSystem battleSystem;

	private bool hasSubscribedToEvents;

	protected virtual void Update()
	{
		if (battleSystem != null)
		{
			if (!hasSubscribedToEvents)
			{
				MonoBehaviour.print("subscribed to battle events");
				hasSubscribedToEvents = true;
				battleSystem.Event_OnPlayerTurn += OnPlayerTurnHandler;
				battleSystem.Event_OnPlayerUseRound += OnPlayerUseRound;
				battleSystem.Event_OnEnemyAttackTurn += OnEnemyTurnHandler;
				battleSystem.Event_OnEnemySpared += OnEnemySpared;
				battleSystem.Event_OnEnemyKilled += OnEnemyKilled;
				battleSystem.Event_OnEnemyDamaged += OnEnemyDamaged;
				battleSystem.Event_OnBattleStart += OnBattleStart;
				battleSystem.Event_OnBattleEnd += OnBattleEnd;
				battleSystem.Event_OnBattleStateChange += OnBattleStateChange;
				battleSystem.Event_OnMemberDamaged += OnMemberDamaged;
				OnBattleStart(battleSystem.CurrentBattle);
			}
		}
		else
		{
			battleSystem = BattleSystem.Instance;
		}
	}

	protected virtual void OnBattleStart(Battle Battle)
	{
		Debug.LogError($"Battle has Begun: {Battle}");
	}

	protected virtual void OnBattleEnd(Battle Battle, BattleSystem.EndBattleTypes EndType)
	{
		Debug.Log($"Battle has ended: {Battle} in the context of {EndType}");
	}

	protected virtual void OnPlayerTurnHandler(int turnCount)
	{
		Debug.Log("Player's Turn: " + turnCount);
	}

	protected virtual void OnPlayerUseRound(List<BattlePartyMemberUse> playerActions)
	{
		Debug.Log($"Player Use Round : \n{playerActions}");
	}

	protected virtual void OnEnemyTurnHandler(int turnCount)
	{
		Debug.Log("Enemy's Turn: " + turnCount);
	}

	protected virtual void OnEnemySpared(BattleActiveEnemy targetEnemy, bool wasSpareable, BattlePartyMember inflictor)
	{
		Debug.Log($"{targetEnemy} spared: {inflictor} | WasSpareable = {wasSpareable}");
	}

	protected virtual void OnEnemyDamaged(BattleActiveEnemy targetEnemy, float Damage, BattlePartyMember inflictor)
	{
		Debug.Log($"{targetEnemy} damaged by {inflictor} for {Damage} damage");
	}

	protected virtual void OnMemberDamaged(BattlePartyMember targetMember, float Damage)
	{
		Debug.Log($"{targetMember} damaged for {Damage} damage");
	}

	protected virtual void OnEnemyKilled(BattleActiveEnemy targetEnemy, float Damage, BattlePartyMember inflictor)
	{
		Debug.Log($"{targetEnemy} killed {inflictor} with {Damage} damage");
	}

	protected virtual void OnBattleStateChange(BattleSystem.BattleState newState, BattleSystem.BattleState oldState)
	{
		Debug.Log($"New Battle State: {newState} | Previous Battle State {oldState}");
	}

	protected virtual void OnDestroy()
	{
		if (battleSystem != null && hasSubscribedToEvents)
		{
			hasSubscribedToEvents = false;
			battleSystem.Event_OnPlayerTurn -= OnPlayerTurnHandler;
			battleSystem.Event_OnEnemyAttackTurn -= OnEnemyTurnHandler;
			battleSystem.Event_OnPlayerUseRound -= OnPlayerUseRound;
			battleSystem.Event_OnEnemySpared -= OnEnemySpared;
			battleSystem.Event_OnEnemyKilled -= OnEnemyKilled;
			battleSystem.Event_OnEnemyDamaged -= OnEnemyDamaged;
			battleSystem.Event_OnBattleStart -= OnBattleStart;
			battleSystem.Event_OnBattleStateChange -= OnBattleStateChange;
			battleSystem.Event_OnMemberDamaged -= OnMemberDamaged;
		}
	}
}