/*
 *
 * (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 System;

using ASC.Api.Core;
using ASC.Api.Settings.Smtp;
using ASC.Common;
using ASC.Core;
using ASC.Core.Billing;
using ASC.Core.Configuration;
using ASC.Core.Tenants;
using ASC.MessagingSystem;
using ASC.Web.Api.Routing;
using ASC.Web.Core.PublicResources;
using ASC.Web.Studio.Core;
using ASC.Web.Studio.Core.Notify;
using ASC.Web.Studio.Utility;

using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;

namespace ASC.Api.Settings
{
    [DefaultRoute]
    [ApiController]
    public class SmtpSettingsController : ControllerBase
    {
        //private static DistributedTaskQueue SMTPTasks { get; } = new DistributedTaskQueue("smtpOperations");

        public Tenant Tenant { get { return ApiContext.Tenant; } }

        private ApiContext ApiContext { get; }
        private PermissionContext PermissionContext { get; }
        private CoreConfiguration CoreConfiguration { get; }
        private CoreBaseSettings CoreBaseSettings { get; }


        public SmtpSettingsController(
            ApiContext apiContext,
            PermissionContext permissionContext,
            CoreConfiguration coreConfiguration,
            CoreBaseSettings coreBaseSettings)
        {
            ApiContext = apiContext;
            PermissionContext = permissionContext;
            CoreConfiguration = coreConfiguration;
            CoreBaseSettings = coreBaseSettings;
        }


        [Read("smtp")]
        public SmtpSettingsWrapper GetSmtpSettings()
        {
            CheckSmtpPermissions();

            var settings = ToSmtpSettings(CoreConfiguration.SmtpSettings, true);

            return settings;
        }

        [Create("smtp")]
        public SmtpSettingsWrapper SaveSmtpSettings(SmtpSettingsWrapper smtpSettings)
        {
            CheckSmtpPermissions();

            //TODO: Add validation check

            if (smtpSettings == null)
                throw new ArgumentNullException("smtpSettings");

            PermissionContext.DemandPermissions(SecutiryConstants.EditPortalSettings);

            var settingConfig = ToSmtpSettingsConfig(smtpSettings);

            CoreConfiguration.SmtpSettings = settingConfig;

            var settings = ToSmtpSettings(settingConfig, true);

            return settings;
        }

        [Delete("smtp")]
        public SmtpSettingsWrapper ResetSmtpSettings()
        {
            CheckSmtpPermissions();

            if (!CoreConfiguration.SmtpSettings.IsDefaultSettings)
            {
                PermissionContext.DemandPermissions(SecutiryConstants.EditPortalSettings);
                CoreConfiguration.SmtpSettings = null;
            }

            var current = CoreBaseSettings.Standalone ? CoreConfiguration.SmtpSettings : SmtpSettings.Empty;

            return ToSmtpSettings(current, true);
        }

        //[Read("smtp/test")]
        //public SmtpOperationStatus TestSmtpSettings()
        //{
        //    CheckSmtpPermissions();

        //    var settings = ToSmtpSettings(CoreConfiguration.SmtpSettings);

        //    //add resolve
        //    var smtpTestOp = new SmtpOperation(settings, Tenant.TenantId, SecurityContext.CurrentAccount.ID, UserManager, SecurityContext, TenantManager, Configuration);

        //    SMTPTasks.QueueTask(smtpTestOp.RunJob, smtpTestOp.GetDistributedTask());

        //    return ToSmtpOperationStatus();
        //}

        //[Read("smtp/test/status")]
        //public SmtpOperationStatus GetSmtpOperationStatus()
        //{
        //    CheckSmtpPermissions();

        //    return ToSmtpOperationStatus();
        //}

        //private SmtpOperationStatus ToSmtpOperationStatus()
        //{
        //    var operations = SMTPTasks.GetTasks().ToList();

        //    foreach (var o in operations)
        //    {
        //        if (!string.IsNullOrEmpty(o.InstanseId) &&
        //            Process.GetProcesses().Any(p => p.Id == int.Parse(o.InstanseId)))
        //            continue;

        //        o.SetProperty(SmtpOperation.PROGRESS, 100);
        //        SMTPTasks.RemoveTask(o.Id);
        //    }

        //    var operation =
        //        operations
        //            .FirstOrDefault(t => t.GetProperty<int>(SmtpOperation.OWNER) == Tenant.TenantId);

        //    if (operation == null)
        //    {
        //        return null;
        //    }

        //    if (DistributedTaskStatus.Running < operation.Status)
        //    {
        //        operation.SetProperty(SmtpOperation.PROGRESS, 100);
        //        SMTPTasks.RemoveTask(operation.Id);
        //    }

        //    var result = new SmtpOperationStatus
        //    {
        //        Id = operation.Id,
        //        Completed = operation.GetProperty<bool>(SmtpOperation.FINISHED),
        //        Percents = operation.GetProperty<int>(SmtpOperation.PROGRESS),
        //        Status = operation.GetProperty<string>(SmtpOperation.RESULT),
        //        Error = operation.GetProperty<string>(SmtpOperation.ERROR),
        //        Source = operation.GetProperty<string>(SmtpOperation.SOURCE)
        //    };

        //    return result;
        //}

        public static SmtpSettings ToSmtpSettingsConfig(SmtpSettingsWrapper settingsWrapper)
        {
            var settingsConfig = new SmtpSettings(
                settingsWrapper.Host,
                settingsWrapper.Port ?? SmtpSettings.DefaultSmtpPort,
                settingsWrapper.SenderAddress,
                settingsWrapper.SenderDisplayName)
            {
                EnableSSL = settingsWrapper.EnableSSL,
                EnableAuth = settingsWrapper.EnableAuth
            };

            if (settingsWrapper.EnableAuth)
            {
                settingsConfig.SetCredentials(settingsWrapper.CredentialsUserName, settingsWrapper.CredentialsUserPassword);
            }

            return settingsConfig;
        }

        private static SmtpSettingsWrapper ToSmtpSettings(SmtpSettings settingsConfig, bool hidePassword = false)
        {
            return new SmtpSettingsWrapper
            {
                Host = settingsConfig.Host,
                Port = settingsConfig.Port,
                SenderAddress = settingsConfig.SenderAddress,
                SenderDisplayName = settingsConfig.SenderDisplayName,
                CredentialsUserName = settingsConfig.CredentialsUserName,
                CredentialsUserPassword = hidePassword ? "" : settingsConfig.CredentialsUserPassword,
                EnableSSL = settingsConfig.EnableSSL,
                EnableAuth = settingsConfig.EnableAuth
            };
        }

        private static void CheckSmtpPermissions()
        {
            if (!SetupInfo.IsVisibleSettings(ManagementType.SmtpSettings.ToString()))
            {
                throw new BillingException(Resource.ErrorNotAllowedOption, "Smtp");
            }
        }
    }

    public static class SmtpSettingsControllerExtension
    {
        public static DIHelper AddSmtpSettingsController(this DIHelper services)
        {
            return services
                .AddMessageServiceService()
                .AddStudioNotifyServiceService()
                .AddApiContextService()
                .AddUserManagerService()
                .AddSecurityContextService()
                .AddPermissionContextService()
                .AddTenantManagerService()
                .AddCoreSettingsService()
                .AddCoreConfigurationService()
                .AddCoreBaseSettingsService()
                ;
        }
    }
}