using Godot;
using System;
using System.Linq;
using Babushka.scripts.CSharp.Common.Quest;

/// <summary>
/// Acts as a base for scripts to check for conditions to complete quests.
/// 
/// The derived Class is responsible for triggering the Check.
/// It is recommended to always check on QuestManager.Instance!.QuestsChanged
/// </summary>
public abstract partial class QuestFulfillmentBase : Node
{
    [Export] private QuestResource _onAvailableQuest = null!;
    [Export] private QuestResource _toNextQuest = null!;
    
    [Export] private bool _whenFulfilledSetAvailableQuestToDone = true;
    [Export] private bool _whenFulfilledSetNextQuestToAvailable = true;
    [Export] private bool _whenFulfilledSetNextQuestToActive = true;

    [Signal] private delegate void OnFulfilledEventHandler();

    protected void Fulfill()
    {
        if (_whenFulfilledSetAvailableQuestToDone)
        {
            QuestManager.Instance!.ChangeQuestStatus(_onAvailableQuest, QuestStatus.Status.Done);
        }
        if (_whenFulfilledSetNextQuestToAvailable)
        {
            QuestManager.Instance!.ChangeQuestStatus(_toNextQuest, QuestStatus.Status.Available);
        }
        if (_whenFulfilledSetNextQuestToActive)
        {
            QuestManager.Instance!.SetActiveQuest(_toNextQuest);
        }
        
        EmitSignalOnFulfilled();
    }

    protected bool IsQuestActive()
    {
        return QuestManager.Instance!.GetAvailableQuests().Any(q => q.Key == _onAvailableQuest);
    }
}