using System;
using System.Threading.Tasks;
using Flawless.Client.Remote;
using Refit;

namespace Flawless.Client;

public static class ApiHelper
{
    private static IFlawlessServer? _gateway;

    public static void ClearGateway()
    {
        Status = null;
        ServerUrl = null;
        _gateway = null;
        Token = null;
    }
    
    public static async Task SetGatewayAsync(string host)
    {
        var setting = new RefitSettings
        {
            AuthorizationHeaderValueGetter = (req, ct) => ApiHelper.Token != null ? 
                Task.FromResult<string>($"Bearer {ApiHelper.Token}") : Task.FromResult(string.Empty)
        };
        
        var tempGateway = RestService.For<IFlawlessServer>(host, setting);
        Status = await tempGateway.Status();
        ServerUrl = host;
        _gateway = tempGateway;
    }

    public static string? ServerUrl { get; private set; }
    
    public static ServerStatusResponse? Status { get; private set; }
    
    public static TokenInfo? Token { get; set; }
    
    public static bool IsGatewayReady => _gateway != null;
    public static IFlawlessServer Gateway => _gateway ?? throw new InvalidProgramException("Not set gateway yet!");
    

    public static bool RequireRefreshToken()
    {
        if (Token == null) return true;
        if (DateTime.UtcNow.AddMinutes(1) > Token.Expiration) return true;
        return false;
    }

    public static async ValueTask<bool> TryRefreshTokenAsync()
    {
        if (Token == null) return false;
        try { Token = await Gateway.Refresh(Token); }
        catch (Exception e)
        {
            await Console.Error.WriteLineAsync(e.ToString());
            return false;
        }

        return true;
    }
}