// (c) Copyright Ascensio System SIA 2010-2022
//
// This program is a free software product.
// You can redistribute it and/or modify it under the terms
// of the GNU Affero General Public License (AGPL) version 3 as published by the Free Software
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// to the effect that Ascensio System SIA expressly excludes the warranty of non-infringement of
// any third-party rights.
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// of MERCHANTABILITY or FITNESS FOR A PARTICULAR  PURPOSE. For details, see
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// All the Product's GUI elements, including illustrations and icon sets, as well as technical writing
// content are licensed under the terms of the Creative Commons Attribution-ShareAlike 4.0
// International. See the License terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode

namespace ASC.FederatedLogin.LoginProviders;

public class MicrosoftLoginProvider : BaseLoginProvider<MicrosoftLoginProvider>
{
    private const string MicrosoftProfileUrl = "https://graph.microsoft.com/oidc/userinfo";

    public override string AccessTokenUrl { get { return "https://login.microsoftonline.com/consumers/oauth2/v2.0/token"; } }
    public override string RedirectUri { get { return this["microsoftRedirectUrl"]; } }
    public override string ClientID { get { return this["microsoftClientId"]; } }
    public override string ClientSecret { get { return this["microsoftClientSecret"]; } }
    public override string CodeUrl { get { return "https://login.microsoftonline.com/consumers/oauth2/v2.0/authorize"; } }
    public override string Scopes { get { return "openid,email,profile"; } }

    private readonly RequestHelper _requestHelper;

    public MicrosoftLoginProvider() { }
    public MicrosoftLoginProvider(
        OAuth20TokenHelper oAuth20TokenHelper,
        TenantManager tenantManager,
        CoreBaseSettings coreBaseSettings,
        CoreSettings coreSettings,
        IConfiguration configuration,
        ICacheNotify<ConsumerCacheItem> cache,
        ConsumerFactory consumerFactory,
        Signature signature,
        InstanceCrypto instanceCrypto,
        RequestHelper requestHelper,
        string name, int order, Dictionary<string, string> props, Dictionary<string, string> additional = null)
            : base(oAuth20TokenHelper, tenantManager, coreBaseSettings, coreSettings, configuration, cache, consumerFactory, signature, instanceCrypto, name, order, props, additional)
    {
        _requestHelper = requestHelper;
    }

    public override LoginProfile GetLoginProfile(string accessToken)
    {
        if (string.IsNullOrEmpty(accessToken))
        {
            throw new Exception("Login failed");
        }

        return RequestProfile(accessToken);
    }

    private LoginProfile RequestProfile(string accessToken)
    {
        var openidProfile = _requestHelper.PerformRequest(MicrosoftProfileUrl, headers: new Dictionary<string, string>() { { "Authorization", "Bearer " + accessToken } });
        var loginProfile = ProfileFromMicrosoft(openidProfile);
        return loginProfile;
    }

    internal LoginProfile ProfileFromMicrosoft(string openidProfile)
    {
        var jProfile = JObject.Parse(openidProfile);
        if (jProfile == null) throw new Exception("Failed to correctly process the response");

        var profile = new LoginProfile(Signature, InstanceCrypto)
        {
            FirstName = jProfile.Value<string>("given_name"),
            LastName = jProfile.Value<string>("family_name"),
            EMail = jProfile.Value<string>("email"),
            Id = jProfile.Value<string>("sub"),
            Provider = ProviderConstants.Microsoft
        };

        return profile;
    }
}