using System;
using System.Collections.Generic;
using Cysharp.Threading.Tasks;
using Gs2.Unity.Core;
using Gs2.Unity.Gs2Quest.Model;
using Gs2.Unity.Gs2Money2.Model;
using Gs2.Unity.Util;

public sealed class AdventurePlayer : IDisposable
{
    public Gs2Domain Gs2 { get; }
    public GameSession Session { get; }
    public IReadOnlyList<EzQuestModel> Quests { get; private set; } = new List<EzQuestModel>();
    public EzProgress Progress { get; private set; }
    public EzWallet Wallet { get; private set; }
    public bool Ready { get; private set; }
    public bool HasPlayerData => Ready && Wallet?.Summary != null;
    private bool disposed;
    private Action unsubscribe;

    public AdventurePlayer(Gs2Domain gs2, GameSession session)
    {
        Gs2 = gs2;
        Session = session;
    }

    public async UniTask Load()
    {
        var current = Gs2.Quest.Namespace("adventure-quest").Me(Session).Progress();
        var progressId = await current.SubscribeWithInitialCallAsync(value => Progress = value);
        if (!KeepSubscription(() => current.Unsubscribe(progressId))) return;

        var balance = Gs2.Money2.Namespace("adventure-coin").Me(Session).Wallet(0);
        var walletId = await balance.SubscribeWithInitialCallAsync(value => Wallet = value);
        if (!KeepSubscription(() => balance.Unsubscribe(walletId))) return;

        await LoadQuests();
        Ready = !disposed;
    }

    private async UniTask LoadQuests()
    {
        var group = Gs2.Quest.Namespace("adventure-quest").QuestGroupModel("main");
        var items = new List<EzQuestModel>();
        await foreach (var item in group.QuestModelsAsync())
        {
            if (item != null) items.Add(item);
        }
        if (!disposed) Quests = items;
    }

    private bool KeepSubscription(Action stop)
    {
        if (disposed) { stop(); return false; }
        unsubscribe += stop;
        return true;
    }

    public void Dispose()
    {
        disposed = true;
        unsubscribe?.Invoke();
        unsubscribe = null;
    }
}