using Gs2.Unity.Util;
using Gs2.Unity.Core;
using System;
using Cysharp.Threading.Tasks;
using GS2Studio.Generated.Message;
using UnityEngine;

public sealed class AdventureEventView : MonoBehaviour
{
    private Gs2Domain Client => Gs2ClientHolder.Instance.Gs2;
    private IGameSession Session => Gs2GameSessionHolder.Instance != null && Gs2GameSessionHolder.Instance.Initialized
        ? Gs2GameSessionHolder.Instance.GameSession : null;
    [SerializeField] private MessageListHandler messages;
    private bool busy;
    private string message = "Load the inbox";
    private Vector2 scroll;
    private string startMinutes = "15";
    private string endMinutes = "30";
    private string startsAt = "";
    private string endsAt = "";
    private string startMillis = "";
    private string endMillis = "";
    private const string Inbox = "Inbox";

    private void OnGUI()
    {
        if (Session == null) return;
        GUILayout.BeginArea(new Rect(700, 20, 650, Screen.height - 40), GUI.skin.box);
        scroll = GUILayout.BeginScrollView(scroll);
        GUILayout.Label("Event announcements and rewards");
        GUILayout.Label(message);
        GUILayout.Label("Set event times (minutes from now)");
        startMinutes = GUILayout.TextField(startMinutes);
        endMinutes = GUILayout.TextField(endMinutes);
        if (GUILayout.Button("Generate start and end times")) MakeDates();
        GUILayout.Label("Studio start time / end time");
        GUILayout.TextField(startsAt);
        GUILayout.TextField(endsAt);
        GUILayout.Label("SDK template START_AT / END_AT");
        GUILayout.TextField(startMillis);
        GUILayout.TextField(endMillis);
        GUI.enabled = !busy;
        if (GUILayout.Button("Receive announcements and update inbox")) Run(() => Load()).Forget();
        foreach (var item in messages.Binders)
        {
            GUILayout.Label(item.Payload);
            GUI.enabled = !busy && !item.IsRead;
            if (GUILayout.Button(item.IsRead ? "Opened" : "Open and claim reward"))
                Run(() => Read(item)).Forget();
        }
        GUI.enabled = true;
        GUILayout.EndScrollView();
        GUILayout.EndArea();
    }

    private void MakeDates()
    {
        if (!int.TryParse(startMinutes, out var start) || !int.TryParse(endMinutes, out var end) ||
            start >= end || start < -1440 || end > 1440)
        {
            message = "Set start before end, both within 1440 minutes of now";
            return;
        }
        var now = System.DateTimeOffset.Now;
        startsAt = now.AddMinutes(start).ToString("yyyy-MM-dd HH:mm:ss zzz");
        endsAt = now.AddMinutes(end).ToString("yyyy-MM-dd HH:mm:ss zzz");
        startMillis = now.AddMinutes(start).ToUnixTimeMilliseconds().ToString();
        endMillis = now.AddMinutes(end).ToUnixTimeMilliseconds().ToString();
    }

    private async UniTask Run(System.Func<UniTask> action)
    {
        if (busy) return;
        busy = true;
        try { await action(); }
        catch (System.Exception error) { message = error.Message; }
        finally { busy = false; }
    }

    private async UniTask Load()
    {
        var user = Client.Inbox.Namespace(Inbox).Me(Session);
        await user.ReceiveGlobalMessageAsync();
        user.InvalidateMessages();
        await messages.ReloadAsync();
        message = messages.Count == 0 ? "No messages received" : "Inbox updated";
    }

    private async UniTask Read(IActionableMessageBinder item)
    {
        await item.Read();
        message = "Message opened";
    }
}