using System;
using System.Linq;
using System.Threading.Tasks;

using Abp.Dependency;

namespace VberAdmin.Authentication.External;

public class ExternalAuthManager : IExternalAuthManager, ITransientDependency
{
    private readonly IIocResolver _iocResolver;
    private readonly IExternalAuthConfiguration _externalAuthConfiguration;

    public ExternalAuthManager(IIocResolver iocResolver, IExternalAuthConfiguration externalAuthConfiguration)
    {
        _iocResolver = iocResolver;
        _externalAuthConfiguration = externalAuthConfiguration;
    }

    public Task<bool> IsValidUser(string provider, string providerKey, string providerAccessCode)
    {
        using (var providerApi = CreateProviderApi(provider))
        {
            return providerApi.Object.IsValidUser(providerKey, providerAccessCode);
        }
    }

    public Task<ExternalAuthUserInfo> GetUserInfo(string provider, string accessCode)
    {
        using (var providerApi = CreateProviderApi(provider))
        {
            return providerApi.Object.GetUserInfo(accessCode);
        }
    }

    public IDisposableDependencyObjectWrapper<IExternalAuthProviderApi> CreateProviderApi(string provider)
    {
        var providerInfo = _externalAuthConfiguration.Providers.FirstOrDefault(p => p.Name == provider);
        if (providerInfo == null)
        {
            throw new Exception("Unknown external auth provider: " + provider);
        }

        var providerApi = _iocResolver.ResolveAsDisposable<IExternalAuthProviderApi>(providerInfo.ProviderApiType);
        providerApi.Object.Initialize(providerInfo);
        return providerApi;
    }
}