/*
 *
 * (c) Copyright Ascensio System Limited 2010-2018
 *
 * This program is freeware. You can redistribute it and/or modify it under the terms of the GNU 
 * General Public License (GPL) version 3 as published by the Free Software Foundation (https://www.gnu.org/copyleft/gpl.html). 
 * In accordance with Section 7(a) of the GNU GPL its Section 15 shall be amended to the effect that 
 * Ascensio System SIA expressly excludes the warranty of non-infringement of any third-party rights.
 *
 * THIS PROGRAM IS DISTRIBUTED WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY OR
 * FITNESS FOR A PARTICULAR PURPOSE. For more details, see GNU GPL at https://www.gnu.org/copyleft/gpl.html
 *
 * You can contact Ascensio System SIA by email at sales@onlyoffice.com
 *
 * The interactive user interfaces in modified source and object code versions of ONLYOFFICE must display 
 * Appropriate Legal Notices, as required under Section 5 of the GNU GPL version 3.
 *
 * Pursuant to Section 7 § 3(b) of the GNU GPL you must retain the original ONLYOFFICE logo which contains 
 * relevant author attributions when distributing the software. If the display of the logo in its graphic 
 * form is not reasonably feasible for technical reasons, you must include the words "Powered by ONLYOFFICE" 
 * in every copy of the program you distribute. 
 * Pursuant to Section 7 § 3(e) we decline to grant you any rights under trademark law for use of our trademarks.
 *
*/


using Constants = ASC.Core.Users.Constants;
using System.Threading.Tasks;

namespace ASC.Web.Studio.Core.SMS;

[Scope]
public class SmsManager
{
    private UserManager UserManager { get; }
    private SecurityContext SecurityContext { get; }
    private TenantManager TenantManager { get; }
    private SmsKeyStorage SmsKeyStorage { get; }
    private SmsSender SmsSender { get; }
    private StudioSmsNotificationSettingsHelper StudioSmsNotificationSettingsHelper { get; }

    public SmsManager(
        UserManager userManager,
        SecurityContext securityContext,
        TenantManager tenantManager,
        SmsKeyStorage smsKeyStorage,
        SmsSender smsSender,
        StudioSmsNotificationSettingsHelper studioSmsNotificationSettingsHelper)
    {
        UserManager = userManager;
        SecurityContext = securityContext;
        TenantManager = tenantManager;
        SmsKeyStorage = smsKeyStorage;
        SmsSender = smsSender;
        StudioSmsNotificationSettingsHelper = studioSmsNotificationSettingsHelper;
    }

    public Task<string> SaveMobilePhoneAsync(UserInfo user, string mobilePhone)
    {
        mobilePhone = SmsSender.GetPhoneValueDigits(mobilePhone);

        if (user == null || Equals(user, Constants.LostUser))
        {
            throw new Exception(Resource.ErrorUserNotFound);
        }

        if (string.IsNullOrEmpty(mobilePhone))
        {
            throw new Exception(Resource.ActivateMobilePhoneEmptyPhoneNumber);
        }

        if (!string.IsNullOrEmpty(user.MobilePhone) && user.MobilePhoneActivationStatus == MobilePhoneActivationStatus.Activated)
        {
            throw new Exception(Resource.MobilePhoneMustErase);
        }

        return InternalSaveMobilePhoneAsync(user, mobilePhone);
    }

    private async Task<string> InternalSaveMobilePhoneAsync(UserInfo user, string mobilePhone)
    {
        user.MobilePhone = mobilePhone;
        user.MobilePhoneActivationStatus = MobilePhoneActivationStatus.NotActivated;
        if (SecurityContext.IsAuthenticated)
        {
            UserManager.SaveUserInfo(user);
        }
        else
        {
            try
            {
                SecurityContext.AuthenticateMeWithoutCookie(ASC.Core.Configuration.Constants.CoreSystem);
                UserManager.SaveUserInfo(user);
            }
            finally
            {
                SecurityContext.Logout();
            }
        }

        if (StudioSmsNotificationSettingsHelper.Enable)
        {
            await PutAuthCodeAsync(user, false);
        }

        return mobilePhone;
    }

    public Task PutAuthCodeAsync(UserInfo user, bool again)
    {
        if (user == null || Equals(user, Constants.LostUser))
        {
            throw new Exception(Resource.ErrorUserNotFound);
        }

        if (!StudioSmsNotificationSettingsHelper.IsVisibleSettings() || !StudioSmsNotificationSettingsHelper.Enable)
        {
            throw new MethodAccessException();
        }

        var mobilePhone = SmsSender.GetPhoneValueDigits(user.MobilePhone);

        if (SmsKeyStorage.ExistsKey(mobilePhone) && !again)
        {
            return Task.CompletedTask;
        }

        if (!SmsKeyStorage.GenerateKey(mobilePhone, out var key))
        {
            throw new Exception(Resource.SmsTooMuchError);
        }

        return InternalPutAuthCodeAsync(mobilePhone, key);
    }

    private async Task InternalPutAuthCodeAsync(string mobilePhone, string key)
    {
        if (await SmsSender.SendSMSAsync(mobilePhone, string.Format(Resource.SmsAuthenticationMessageToUser, key)))
        {
            TenantManager.SetTenantQuotaRow(new TenantQuotaRow { Tenant = TenantManager.GetCurrentTenant().Id, Path = "/sms", Counter = 1 }, true);
        }
    }

    public void ValidateSmsCode(UserInfo user, string code)
    {
        if (!StudioSmsNotificationSettingsHelper.IsVisibleSettings()
            || !StudioSmsNotificationSettingsHelper.Enable)
        {
            return;
        }

        if (user == null || Equals(user, Constants.LostUser))
        {
            throw new Exception(Resource.ErrorUserNotFound);
        }

        var valid = SmsKeyStorage.ValidateKey(user.MobilePhone, code);
        switch (valid)
        {
            case SmsKeyStorage.Result.Empty:
                throw new Exception(Resource.ActivateMobilePhoneEmptyCode);
            case SmsKeyStorage.Result.TooMuch:
                throw new BruteForceCredentialException(Resource.SmsTooMuchError);
            case SmsKeyStorage.Result.Timeout:
                throw new TimeoutException(Resource.SmsAuthenticationTimeout);
            case SmsKeyStorage.Result.Invalide:
                throw new ArgumentException(Resource.SmsAuthenticationMessageError);
        }
        if (valid != SmsKeyStorage.Result.Ok)
        {
            throw new Exception("Error: " + valid);
        }

        if (!SecurityContext.IsAuthenticated)
        {
            SecurityContext.AuthenticateMe(user.Id);
            //CookiesManager.SetCookies(CookiesType.AuthKey, cookiesKey);
        }

        if (user.MobilePhoneActivationStatus == MobilePhoneActivationStatus.NotActivated)
        {
            user.MobilePhoneActivationStatus = MobilePhoneActivationStatus.Activated;
            UserManager.SaveUserInfo(user);
        }
    }
}