using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Http;
using Oqtane.Enums;
using Oqtane.Infrastructure;
using Oqtane.Models;
using Oqtane.Security;
using Oqtane.Shared;
using SZUAbsolventenverein.Module.BlackBoard.Repository;

namespace SZUAbsolventenverein.Module.BlackBoard.Services
{
    public class ServerBlackBoardService : IBlackBoardService
    {
        private readonly IBlackBoardRepository _BlackBoardRepository;
        private readonly IUserPermissions _userPermissions;
        private readonly ILogManager _logger;
        private readonly IHttpContextAccessor _accessor;
        private readonly Alias _alias;

        public ServerBlackBoardService(IBlackBoardRepository BlackBoardRepository, IUserPermissions userPermissions, ITenantManager tenantManager, ILogManager logger, IHttpContextAccessor accessor)
        {
            _BlackBoardRepository = BlackBoardRepository;
            _userPermissions = userPermissions;
            _logger = logger;
            _accessor = accessor;
            _alias = tenantManager.GetAlias();
        }

        public Task<List<Models.BlackBoard>> GetBlackBoardsAsync(int ModuleId)
        {
            if (_userPermissions.IsAuthorized(_accessor.HttpContext.User, _alias.SiteId, EntityNames.Module, ModuleId, PermissionNames.View))
            {
                return Task.FromResult(_BlackBoardRepository.GetBlackBoards(ModuleId).ToList());
            }
            else
            {
                _logger.Log(LogLevel.Error, this, LogFunction.Security, "Unauthorized BlackBoard Get Attempt {ModuleId}", ModuleId);
                return null;
            }
        }

        public Task<Models.BlackBoard> GetBlackBoardAsync(int BlackBoardId, int ModuleId)
        {
            if (_userPermissions.IsAuthorized(_accessor.HttpContext.User, _alias.SiteId, EntityNames.Module, ModuleId, PermissionNames.View))
            {
                return Task.FromResult(_BlackBoardRepository.GetBlackBoard(BlackBoardId));
            }
            else
            {
                _logger.Log(LogLevel.Error, this, LogFunction.Security, "Unauthorized BlackBoard Get Attempt {BlackBoardId} {ModuleId}", BlackBoardId, ModuleId);
                return null;
            }
        }

        public Task<Models.BlackBoard> AddBlackBoardAsync(Models.BlackBoard BlackBoard)
        {
            if (_userPermissions.IsAuthorized(_accessor.HttpContext.User, _alias.SiteId, EntityNames.Module, BlackBoard.ModuleId, PermissionNames.Edit))
            {
                BlackBoard = _BlackBoardRepository.AddBlackBoard(BlackBoard);
                _logger.Log(LogLevel.Information, this, LogFunction.Create, "BlackBoard Added {BlackBoard}", BlackBoard);
            }
            else
            {
                _logger.Log(LogLevel.Error, this, LogFunction.Security, "Unauthorized BlackBoard Add Attempt {BlackBoard}", BlackBoard);
                BlackBoard = null;
            }
            return Task.FromResult(BlackBoard);
        }

        public Task<Models.BlackBoard> UpdateBlackBoardAsync(Models.BlackBoard BlackBoard)
        {
            if (_userPermissions.IsAuthorized(_accessor.HttpContext.User, _alias.SiteId, EntityNames.Module, BlackBoard.ModuleId, PermissionNames.Edit))
            {
                BlackBoard = _BlackBoardRepository.UpdateBlackBoard(BlackBoard);
                _logger.Log(LogLevel.Information, this, LogFunction.Update, "BlackBoard Updated {BlackBoard}", BlackBoard);
            }
            else
            {
                _logger.Log(LogLevel.Error, this, LogFunction.Security, "Unauthorized BlackBoard Update Attempt {BlackBoard}", BlackBoard);
                BlackBoard = null;
            }
            return Task.FromResult(BlackBoard);
        }

        public Task DeleteBlackBoardAsync(int BlackBoardId, int ModuleId)
        {
            if (_userPermissions.IsAuthorized(_accessor.HttpContext.User, _alias.SiteId, EntityNames.Module, ModuleId, PermissionNames.Edit))
            {
                _BlackBoardRepository.DeleteBlackBoard(BlackBoardId);
                _logger.Log(LogLevel.Information, this, LogFunction.Delete, "BlackBoard Deleted {BlackBoardId}", BlackBoardId);
            }
            else
            {
                _logger.Log(LogLevel.Error, this, LogFunction.Security, "Unauthorized BlackBoard Delete Attempt {BlackBoardId} {ModuleId}", BlackBoardId, ModuleId);
            }
            return Task.CompletedTask;
        }
    }
}