using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.Json;
using System.Threading.Tasks;
using Azure.Messaging.EventGrid;
using Bit.Api.Models.Request;
using Bit.Api.Models.Request.Accounts;
using Bit.Api.Models.Request.Organizations;
using Bit.Api.Models.Response;
using Bit.Api.Utilities;
using Bit.Core;
using Bit.Core.Context;
using Bit.Core.Entities;
using Bit.Core.Exceptions;
using Bit.Core.Models.Data;
using Bit.Core.Repositories;
using Bit.Core.Services;
using Bit.Core.Settings;
using Bit.Core.Utilities;
using Core.Models.Data;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging;

namespace Bit.Api.Controllers
{
    [Route("ciphers")]
    [Authorize("Application")]
    public class CiphersController : Controller
    {
        private readonly ICipherRepository _cipherRepository;
        private readonly ICollectionCipherRepository _collectionCipherRepository;
        private readonly ICipherService _cipherService;
        private readonly IUserService _userService;
        private readonly IAttachmentStorageService _attachmentStorageService;
        private readonly IProviderService _providerService;
        private readonly ICurrentContext _currentContext;
        private readonly ILogger<CiphersController> _logger;
        private readonly GlobalSettings _globalSettings;

        public CiphersController(
            ICipherRepository cipherRepository,
            ICollectionCipherRepository collectionCipherRepository,
            ICipherService cipherService,
            IUserService userService,
            IAttachmentStorageService attachmentStorageService,
            IProviderService providerService,
            ICurrentContext currentContext,
            ILogger<CiphersController> logger,
            GlobalSettings globalSettings)
        {
            _cipherRepository = cipherRepository;
            _collectionCipherRepository = collectionCipherRepository;
            _cipherService = cipherService;
            _userService = userService;
            _attachmentStorageService = attachmentStorageService;
            _providerService = providerService;
            _currentContext = currentContext;
            _logger = logger;
            _globalSettings = globalSettings;
        }

        [HttpGet("{id}")]
        public async Task<CipherResponseModel> Get(string id)
        {
            var userId = _userService.GetProperUserId(User).Value;
            var cipher = await _cipherRepository.GetByIdAsync(new Guid(id), userId);
            if (cipher == null)
            {
                throw new NotFoundException();
            }

            return new CipherResponseModel(cipher, _globalSettings);
        }

        [HttpGet("{id}/admin")]
        public async Task<CipherMiniResponseModel> GetAdmin(string id)
        {
            var cipher = await _cipherRepository.GetOrganizationDetailsByIdAsync(new Guid(id));
            if (cipher == null || !cipher.OrganizationId.HasValue ||
                !await _currentContext.ViewAllCollections(cipher.OrganizationId.Value))
            {
                throw new NotFoundException();
            }

            return new CipherMiniResponseModel(cipher, _globalSettings, cipher.OrganizationUseTotp);
        }

        [HttpGet("{id}/full-details")]
        [HttpGet("{id}/details")]
        public async Task<CipherDetailsResponseModel> GetDetails(string id)
        {
            var userId = _userService.GetProperUserId(User).Value;
            var cipherId = new Guid(id);
            var cipher = await _cipherRepository.GetByIdAsync(cipherId, userId);
            if (cipher == null)
            {
                throw new NotFoundException();
            }

            var collectionCiphers = await _collectionCipherRepository.GetManyByUserIdCipherIdAsync(userId, cipherId);
            return new CipherDetailsResponseModel(cipher, _globalSettings, collectionCiphers);
        }

        [HttpGet("")]
        public async Task<ListResponseModel<CipherDetailsResponseModel>> Get()
        {
            var userId = _userService.GetProperUserId(User).Value;
            var hasOrgs = _currentContext.Organizations?.Any() ?? false;
            // TODO: Use hasOrgs proper for cipher listing here?
            var ciphers = await _cipherRepository.GetManyByUserIdAsync(userId, true || hasOrgs);
            Dictionary<Guid, IGrouping<Guid, CollectionCipher>> collectionCiphersGroupDict = null;
            if (hasOrgs)
            {
                var collectionCiphers = await _collectionCipherRepository.GetManyByUserIdAsync(userId);
                collectionCiphersGroupDict = collectionCiphers.GroupBy(c => c.CipherId).ToDictionary(s => s.Key);
            }

            var responses = ciphers.Select(c => new CipherDetailsResponseModel(c, _globalSettings,
                collectionCiphersGroupDict)).ToList();
            return new ListResponseModel<CipherDetailsResponseModel>(responses);
        }

        [HttpPost("")]
        public async Task<CipherResponseModel> Post([FromBody] CipherRequestModel model)
        {
            var userId = _userService.GetProperUserId(User).Value;
            var cipher = model.ToCipherDetails(userId);
            if (cipher.OrganizationId.HasValue && !await _currentContext.OrganizationUser(cipher.OrganizationId.Value))
            {
                throw new NotFoundException();
            }

            await _cipherService.SaveDetailsAsync(cipher, userId, model.LastKnownRevisionDate, null, cipher.OrganizationId.HasValue);
            var response = new CipherResponseModel(cipher, _globalSettings);
            return response;
        }

        [HttpPost("create")]
        public async Task<CipherResponseModel> PostCreate([FromBody] CipherCreateRequestModel model)
        {
            var userId = _userService.GetProperUserId(User).Value;
            var cipher = model.Cipher.ToCipherDetails(userId);
            if (cipher.OrganizationId.HasValue && !await _currentContext.OrganizationUser(cipher.OrganizationId.Value))
            {
                throw new NotFoundException();
            }

            await _cipherService.SaveDetailsAsync(cipher, userId, model.Cipher.LastKnownRevisionDate, model.CollectionIds, cipher.OrganizationId.HasValue);
            var response = new CipherResponseModel(cipher, _globalSettings);
            return response;
        }

        [HttpPost("admin")]
        public async Task<CipherMiniResponseModel> PostAdmin([FromBody] CipherCreateRequestModel model)
        {
            var cipher = model.Cipher.ToOrganizationCipher();
            if (!await _currentContext.EditAnyCollection(cipher.OrganizationId.Value))
            {
                throw new NotFoundException();
            }

            var userId = _userService.GetProperUserId(User).Value;
            await _cipherService.SaveAsync(cipher, userId, model.Cipher.LastKnownRevisionDate, model.CollectionIds, true, false);

            var response = new CipherMiniResponseModel(cipher, _globalSettings, false);
            return response;
        }

        [HttpPut("{id}")]
        [HttpPost("{id}")]
        public async Task<CipherResponseModel> Put(string id, [FromBody] CipherRequestModel model)
        {
            var userId = _userService.GetProperUserId(User).Value;
            var cipher = await _cipherRepository.GetByIdAsync(new Guid(id), userId);
            if (cipher == null)
            {
                throw new NotFoundException();
            }

            var modelOrgId = string.IsNullOrWhiteSpace(model.OrganizationId) ?
                (Guid?)null : new Guid(model.OrganizationId);
            if (cipher.OrganizationId != modelOrgId)
            {
                throw new BadRequestException("Organization mismatch. Re-sync if you recently moved this item, " +
                    "then try again.");
            }

            await _cipherService.SaveDetailsAsync(model.ToCipherDetails(cipher), userId, model.LastKnownRevisionDate);

            var response = new CipherResponseModel(cipher, _globalSettings);
            return response;
        }

        [HttpPut("{id}/admin")]
        [HttpPost("{id}/admin")]
        public async Task<CipherMiniResponseModel> PutAdmin(string id, [FromBody] CipherRequestModel model)
        {
            var userId = _userService.GetProperUserId(User).Value;
            var cipher = await _cipherRepository.GetOrganizationDetailsByIdAsync(new Guid(id));
            if (cipher == null || !cipher.OrganizationId.HasValue ||
                !await _currentContext.EditAnyCollection(cipher.OrganizationId.Value))
            {
                throw new NotFoundException();
            }

            // object cannot be a descendant of CipherDetails, so let's clone it.
            var cipherClone = model.ToCipher(cipher).Clone();
            await _cipherService.SaveAsync(cipherClone, userId, model.LastKnownRevisionDate, null, true, false);

            var response = new CipherMiniResponseModel(cipherClone, _globalSettings, cipher.OrganizationUseTotp);
            return response;
        }

        [HttpGet("organization-details")]
        public async Task<ListResponseModel<CipherMiniDetailsResponseModel>> GetOrganizationCollections(
            string organizationId)
        {
            var userId = _userService.GetProperUserId(User).Value;
            var orgIdGuid = new Guid(organizationId);
            if (!await _currentContext.ViewAllCollections(orgIdGuid) && !await _currentContext.AccessReports(orgIdGuid))
            {
                throw new NotFoundException();
            }

            var ciphers = await _cipherRepository.GetManyByUserIdAsync(userId, true);
            var orgCiphers = ciphers.Where(c => c.OrganizationId == orgIdGuid);
            var orgCipherIds = orgCiphers.Select(c => c.Id);

            var collectionCiphers = await _collectionCipherRepository.GetManyByOrganizationIdAsync(orgIdGuid);
            var collectionCiphersGroupDict = collectionCiphers
                .Where(c => orgCipherIds.Contains(c.CipherId))
                .GroupBy(c => c.CipherId).ToDictionary(s => s.Key);


            var responses = orgCiphers.Select(c => new CipherMiniDetailsResponseModel(c, _globalSettings,
                collectionCiphersGroupDict));

            var providerId = await _currentContext.ProviderIdForOrg(orgIdGuid);
            if (providerId.HasValue)
            {
                await _providerService.LogProviderAccessToOrganizationAsync(orgIdGuid);
            }
            return new ListResponseModel<CipherMiniDetailsResponseModel>(responses);
        }

        [HttpPost("import")]
        public async Task PostImport([FromBody] ImportCiphersRequestModel model)
        {
            if (!_globalSettings.SelfHosted &&
                (model.Ciphers.Count() > 6000 || model.FolderRelationships.Count() > 6000 ||
                    model.Folders.Count() > 1000))
            {
                throw new BadRequestException("You cannot import this much data at once.");
            }

            var userId = _userService.GetProperUserId(User).Value;
            var folders = model.Folders.Select(f => f.ToFolder(userId)).ToList();
            var ciphers = model.Ciphers.Select(c => c.ToCipherDetails(userId, false)).ToList();
            await _cipherService.ImportCiphersAsync(folders, ciphers, model.FolderRelationships);
        }

        [HttpPost("import-organization")]
        public async Task PostImport([FromQuery] string organizationId,
            [FromBody] ImportOrganizationCiphersRequestModel model)
        {
            if (!_globalSettings.SelfHosted &&
                (model.Ciphers.Count() > 6000 || model.CollectionRelationships.Count() > 12000 ||
                    model.Collections.Count() > 1000))
            {
                throw new BadRequestException("You cannot import this much data at once.");
            }

            var orgId = new Guid(organizationId);
            if (!await _currentContext.AccessImportExport(orgId))
            {
                throw new NotFoundException();
            }

            var userId = _userService.GetProperUserId(User).Value;
            var collections = model.Collections.Select(c => c.ToCollection(orgId)).ToList();
            var ciphers = model.Ciphers.Select(l => l.ToOrganizationCipherDetails(orgId)).ToList();
            await _cipherService.ImportCiphersAsync(collections, ciphers, model.CollectionRelationships, userId);
        }

        [HttpPut("{id}/partial")]
        [HttpPost("{id}/partial")]
        public async Task PutPartial(string id, [FromBody] CipherPartialRequestModel model)
        {
            var userId = _userService.GetProperUserId(User).Value;
            var folderId = string.IsNullOrWhiteSpace(model.FolderId) ? null : (Guid?)new Guid(model.FolderId);
            await _cipherRepository.UpdatePartialAsync(new Guid(id), userId, folderId, model.Favorite);
        }

        [HttpPut("{id}/share")]
        [HttpPost("{id}/share")]
        public async Task<CipherResponseModel> PutShare(string id, [FromBody] CipherShareRequestModel model)
        {
            var userId = _userService.GetProperUserId(User).Value;
            var cipherId = new Guid(id);
            var cipher = await _cipherRepository.GetByIdAsync(cipherId);
            if (cipher == null || cipher.UserId != userId ||
                !await _currentContext.OrganizationUser(new Guid(model.Cipher.OrganizationId)))
            {
                throw new NotFoundException();
            }

            var original = cipher.Clone();
            await _cipherService.ShareAsync(original, model.Cipher.ToCipher(cipher), new Guid(model.Cipher.OrganizationId),
                model.CollectionIds.Select(c => new Guid(c)), userId, model.Cipher.LastKnownRevisionDate);

            var sharedCipher = await _cipherRepository.GetByIdAsync(cipherId, userId);
            var response = new CipherResponseModel(sharedCipher, _globalSettings);
            return response;
        }

        [HttpPut("{id}/collections")]
        [HttpPost("{id}/collections")]
        public async Task PutCollections(string id, [FromBody] CipherCollectionsRequestModel model)
        {
            var userId = _userService.GetProperUserId(User).Value;
            var cipher = await _cipherRepository.GetByIdAsync(new Guid(id), userId);
            if (cipher == null || !cipher.OrganizationId.HasValue ||
                !await _currentContext.OrganizationUser(cipher.OrganizationId.Value))
            {
                throw new NotFoundException();
            }

            await _cipherService.SaveCollectionsAsync(cipher,
                model.CollectionIds.Select(c => new Guid(c)), userId, false);
        }

        [HttpPut("{id}/collections-admin")]
        [HttpPost("{id}/collections-admin")]
        public async Task PutCollectionsAdmin(string id, [FromBody] CipherCollectionsRequestModel model)
        {
            var userId = _userService.GetProperUserId(User).Value;
            var cipher = await _cipherRepository.GetByIdAsync(new Guid(id));
            if (cipher == null || !cipher.OrganizationId.HasValue ||
                !await _currentContext.EditAnyCollection(cipher.OrganizationId.Value))
            {
                throw new NotFoundException();
            }

            await _cipherService.SaveCollectionsAsync(cipher,
                model.CollectionIds.Select(c => new Guid(c)), userId, true);
        }

        [HttpDelete("{id}")]
        [HttpPost("{id}/delete")]
        public async Task Delete(string id)
        {
            var userId = _userService.GetProperUserId(User).Value;
            var cipher = await _cipherRepository.GetByIdAsync(new Guid(id), userId);
            if (cipher == null)
            {
                throw new NotFoundException();
            }

            await _cipherService.DeleteAsync(cipher, userId);
        }

        [HttpDelete("{id}/admin")]
        [HttpPost("{id}/delete-admin")]
        public async Task DeleteAdmin(string id)
        {
            var userId = _userService.GetProperUserId(User).Value;
            var cipher = await _cipherRepository.GetByIdAsync(new Guid(id));
            if (cipher == null || !cipher.OrganizationId.HasValue ||
                !await _currentContext.EditAnyCollection(cipher.OrganizationId.Value))
            {
                throw new NotFoundException();
            }

            await _cipherService.DeleteAsync(cipher, userId, true);
        }

        [HttpDelete("")]
        [HttpPost("delete")]
        public async Task DeleteMany([FromBody] CipherBulkDeleteRequestModel model)
        {
            if (!_globalSettings.SelfHosted && model.Ids.Count() > 500)
            {
                throw new BadRequestException("You can only delete up to 500 items at a time. " +
                    "Consider using the \"Purge Vault\" option instead.");
            }

            var userId = _userService.GetProperUserId(User).Value;
            await _cipherService.DeleteManyAsync(model.Ids.Select(i => new Guid(i)), userId);
        }

        [HttpDelete("admin")]
        [HttpPost("delete-admin")]
        public async Task DeleteManyAdmin([FromBody] CipherBulkDeleteRequestModel model)
        {
            if (!_globalSettings.SelfHosted && model.Ids.Count() > 500)
            {
                throw new BadRequestException("You can only delete up to 500 items at a time. " +
                    "Consider using the \"Purge Vault\" option instead.");
            }

            if (model == null || string.IsNullOrWhiteSpace(model.OrganizationId) ||
                !await _currentContext.EditAnyCollection(new Guid(model.OrganizationId)))
            {
                throw new NotFoundException();
            }

            var userId = _userService.GetProperUserId(User).Value;
            await _cipherService.DeleteManyAsync(model.Ids.Select(i => new Guid(i)), userId, new Guid(model.OrganizationId), true);
        }

        [HttpPut("{id}/delete")]
        public async Task PutDelete(string id)
        {
            var userId = _userService.GetProperUserId(User).Value;
            var cipher = await _cipherRepository.GetByIdAsync(new Guid(id), userId);
            if (cipher == null)
            {
                throw new NotFoundException();
            }
            await _cipherService.SoftDeleteAsync(cipher, userId);
        }

        [HttpPut("{id}/delete-admin")]
        public async Task PutDeleteAdmin(string id)
        {
            var userId = _userService.GetProperUserId(User).Value;
            var cipher = await _cipherRepository.GetByIdAsync(new Guid(id));
            if (cipher == null || !cipher.OrganizationId.HasValue ||
                !await _currentContext.EditAnyCollection(cipher.OrganizationId.Value))
            {
                throw new NotFoundException();
            }

            await _cipherService.SoftDeleteAsync(cipher, userId, true);
        }

        [HttpPut("delete")]
        public async Task PutDeleteMany([FromBody] CipherBulkDeleteRequestModel model)
        {
            if (!_globalSettings.SelfHosted && model.Ids.Count() > 500)
            {
                throw new BadRequestException("You can only delete up to 500 items at a time.");
            }

            var userId = _userService.GetProperUserId(User).Value;
            await _cipherService.SoftDeleteManyAsync(model.Ids.Select(i => new Guid(i)), userId);
        }

        [HttpPut("delete-admin")]
        public async Task PutDeleteManyAdmin([FromBody] CipherBulkDeleteRequestModel model)
        {
            if (!_globalSettings.SelfHosted && model.Ids.Count() > 500)
            {
                throw new BadRequestException("You can only delete up to 500 items at a time.");
            }

            if (model == null || string.IsNullOrWhiteSpace(model.OrganizationId) ||
                !await _currentContext.EditAnyCollection(new Guid(model.OrganizationId)))
            {
                throw new NotFoundException();
            }

            var userId = _userService.GetProperUserId(User).Value;
            await _cipherService.SoftDeleteManyAsync(model.Ids.Select(i => new Guid(i)), userId, new Guid(model.OrganizationId), true);
        }

        [HttpPut("{id}/restore")]
        public async Task<CipherResponseModel> PutRestore(string id)
        {
            var userId = _userService.GetProperUserId(User).Value;
            var cipher = await _cipherRepository.GetByIdAsync(new Guid(id), userId);
            if (cipher == null)
            {
                throw new NotFoundException();
            }

            await _cipherService.RestoreAsync(cipher, userId);
            return new CipherResponseModel(cipher, _globalSettings);
        }

        [HttpPut("{id}/restore-admin")]
        public async Task<CipherMiniResponseModel> PutRestoreAdmin(string id)
        {
            var userId = _userService.GetProperUserId(User).Value;
            var cipher = await _cipherRepository.GetOrganizationDetailsByIdAsync(new Guid(id));
            if (cipher == null || !cipher.OrganizationId.HasValue ||
                !await _currentContext.EditAnyCollection(cipher.OrganizationId.Value))
            {
                throw new NotFoundException();
            }

            await _cipherService.RestoreAsync(cipher, userId, true);
            return new CipherMiniResponseModel(cipher, _globalSettings, cipher.OrganizationUseTotp);
        }

        [HttpPut("restore")]
        public async Task<ListResponseModel<CipherResponseModel>> PutRestoreMany([FromBody] CipherBulkRestoreRequestModel model)
        {
            if (!_globalSettings.SelfHosted && model.Ids.Count() > 500)
            {
                throw new BadRequestException("You can only restore up to 500 items at a time.");
            }

            var userId = _userService.GetProperUserId(User).Value;
            var cipherIdsToRestore = new HashSet<Guid>(model.Ids.Select(i => new Guid(i)));

            var ciphers = await _cipherRepository.GetManyByUserIdAsync(userId);
            var restoringCiphers = ciphers.Where(c => cipherIdsToRestore.Contains(c.Id) && c.Edit);

            await _cipherService.RestoreManyAsync(restoringCiphers, userId);
            var responses = restoringCiphers.Select(c => new CipherResponseModel(c, _globalSettings));
            return new ListResponseModel<CipherResponseModel>(responses);
        }

        [HttpPut("move")]
        [HttpPost("move")]
        public async Task MoveMany([FromBody] CipherBulkMoveRequestModel model)
        {
            if (!_globalSettings.SelfHosted && model.Ids.Count() > 500)
            {
                throw new BadRequestException("You can only move up to 500 items at a time.");
            }

            var userId = _userService.GetProperUserId(User).Value;
            await _cipherService.MoveManyAsync(model.Ids.Select(i => new Guid(i)),
                string.IsNullOrWhiteSpace(model.FolderId) ? (Guid?)null : new Guid(model.FolderId), userId);
        }

        [HttpPut("share")]
        [HttpPost("share")]
        public async Task PutShareMany([FromBody] CipherBulkShareRequestModel model)
        {
            var organizationId = new Guid(model.Ciphers.First().OrganizationId);
            if (!await _currentContext.OrganizationUser(organizationId))
            {
                throw new NotFoundException();
            }

            var userId = _userService.GetProperUserId(User).Value;
            var ciphers = await _cipherRepository.GetManyByUserIdAsync(userId, false);
            var ciphersDict = ciphers.ToDictionary(c => c.Id);

            var shareCiphers = new List<(Cipher, DateTime?)>();
            foreach (var cipher in model.Ciphers)
            {
                if (!ciphersDict.ContainsKey(cipher.Id.Value))
                {
                    throw new BadRequestException("Trying to move ciphers that you do not own.");
                }

                shareCiphers.Add((cipher.ToCipher(ciphersDict[cipher.Id.Value]), cipher.LastKnownRevisionDate));
            }

            await _cipherService.ShareManyAsync(shareCiphers, organizationId,
                model.CollectionIds.Select(c => new Guid(c)), userId);
        }

        [HttpPost("purge")]
        public async Task PostPurge([FromBody] SecretVerificationRequestModel model, string organizationId = null)
        {
            var user = await _userService.GetUserByPrincipalAsync(User);
            if (user == null)
            {
                throw new UnauthorizedAccessException();
            }

            if (!await _userService.VerifySecretAsync(user, model.Secret))
            {
                ModelState.AddModelError(string.Empty, "User verification failed.");
                await Task.Delay(2000);
                throw new BadRequestException(ModelState);
            }

            if (string.IsNullOrWhiteSpace(organizationId))
            {
                await _cipherRepository.DeleteByUserIdAsync(user.Id);
            }
            else
            {
                var orgId = new Guid(organizationId);
                if (!await _currentContext.EditAnyCollection(orgId))
                {
                    throw new NotFoundException();
                }
                await _cipherService.PurgeAsync(orgId);
            }
        }

        [HttpPost("{id}/attachment/v2")]
        public async Task<AttachmentUploadDataResponseModel> PostAttachment(string id, [FromBody] AttachmentRequestModel request)
        {
            var idGuid = new Guid(id);
            var userId = _userService.GetProperUserId(User).Value;
            var cipher = request.AdminRequest ?
                await _cipherRepository.GetOrganizationDetailsByIdAsync(idGuid) :
                await _cipherRepository.GetByIdAsync(idGuid, userId);

            if (cipher == null || (request.AdminRequest && (!cipher.OrganizationId.HasValue ||
                !await _currentContext.EditAnyCollection(cipher.OrganizationId.Value))))
            {
                throw new NotFoundException();
            }

            if (request.FileSize > CipherService.MAX_FILE_SIZE)
            {
                throw new BadRequestException($"Max file size is {CipherService.MAX_FILE_SIZE_READABLE}.");
            }

            var (attachmentId, uploadUrl) = await _cipherService.CreateAttachmentForDelayedUploadAsync(cipher,
                request.Key, request.FileName, request.FileSize, request.AdminRequest, userId);
            return new AttachmentUploadDataResponseModel
            {
                AttachmentId = attachmentId,
                Url = uploadUrl,
                FileUploadType = _attachmentStorageService.FileUploadType,
                CipherResponse = request.AdminRequest ? null : new CipherResponseModel((CipherDetails)cipher, _globalSettings),
                CipherMiniResponse = request.AdminRequest ? new CipherMiniResponseModel(cipher, _globalSettings, cipher.OrganizationUseTotp) : null,
            };
        }

        [HttpGet("{id}/attachment/{attachmentId}/renew")]
        public async Task<AttachmentUploadDataResponseModel> RenewFileUploadUrl(string id, string attachmentId)
        {
            var userId = _userService.GetProperUserId(User).Value;
            var cipherId = new Guid(id);
            var cipher = await _cipherRepository.GetByIdAsync(cipherId, userId);
            var attachments = cipher?.GetAttachments();

            if (attachments == null || !attachments.ContainsKey(attachmentId) || attachments[attachmentId].Validated)
            {
                throw new NotFoundException();
            }

            return new AttachmentUploadDataResponseModel
            {
                Url = await _attachmentStorageService.GetAttachmentUploadUrlAsync(cipher, attachments[attachmentId]),
                FileUploadType = _attachmentStorageService.FileUploadType,
            };
        }

        [HttpPost("{id}/attachment/{attachmentId}")]
        [SelfHosted(SelfHostedOnly = true)]
        [RequestSizeLimit(Constants.FileSize501mb)]
        [DisableFormValueModelBinding]
        public async Task PostFileForExistingAttachment(string id, string attachmentId)
        {
            if (!Request?.ContentType.Contains("multipart/") ?? true)
            {
                throw new BadRequestException("Invalid content.");
            }

            var userId = _userService.GetProperUserId(User).Value;
            var cipher = await _cipherRepository.GetByIdAsync(new Guid(id), userId);
            var attachments = cipher?.GetAttachments();
            if (attachments == null || !attachments.ContainsKey(attachmentId))
            {
                throw new NotFoundException();
            }
            var attachmentData = attachments[attachmentId];

            await Request.GetFileAsync(async (stream) =>
            {
                await _cipherService.UploadFileForExistingAttachmentAsync(stream, cipher, attachmentData);
            });
        }

        [HttpPost("{id}/attachment")]
        [Obsolete("Deprecated Attachments API", false)]
        [RequestSizeLimit(Constants.FileSize101mb)]
        [DisableFormValueModelBinding]
        public async Task<CipherResponseModel> PostAttachment(string id)
        {
            ValidateAttachment();

            var idGuid = new Guid(id);
            var userId = _userService.GetProperUserId(User).Value;
            var cipher = await _cipherRepository.GetByIdAsync(idGuid, userId);
            if (cipher == null)
            {
                throw new NotFoundException();
            }

            await Request.GetFileAsync(async (stream, fileName, key) =>
            {
                await _cipherService.CreateAttachmentAsync(cipher, stream, fileName, key,
                        Request.ContentLength.GetValueOrDefault(0), userId);
            });

            return new CipherResponseModel(cipher, _globalSettings);
        }

        [HttpPost("{id}/attachment-admin")]
        [RequestSizeLimit(Constants.FileSize101mb)]
        [DisableFormValueModelBinding]
        public async Task<CipherMiniResponseModel> PostAttachmentAdmin(string id)
        {
            ValidateAttachment();

            var idGuid = new Guid(id);
            var userId = _userService.GetProperUserId(User).Value;
            var cipher = await _cipherRepository.GetOrganizationDetailsByIdAsync(idGuid);
            if (cipher == null || !cipher.OrganizationId.HasValue ||
                !await _currentContext.EditAnyCollection(cipher.OrganizationId.Value))
            {
                throw new NotFoundException();
            }

            await Request.GetFileAsync(async (stream, fileName, key) =>
            {
                await _cipherService.CreateAttachmentAsync(cipher, stream, fileName, key,
                        Request.ContentLength.GetValueOrDefault(0), userId, true);
            });

            return new CipherMiniResponseModel(cipher, _globalSettings, cipher.OrganizationUseTotp);
        }

        [HttpGet("{id}/attachment/{attachmentId}")]
        public async Task<AttachmentResponseModel> GetAttachmentData(string id, string attachmentId)
        {
            var userId = _userService.GetProperUserId(User).Value;
            var cipher = await _cipherRepository.GetByIdAsync(new Guid(id), userId);
            var result = await _cipherService.GetAttachmentDownloadDataAsync(cipher, attachmentId);
            return new AttachmentResponseModel(result);
        }

        [HttpPost("{id}/attachment/{attachmentId}/share")]
        [RequestSizeLimit(Constants.FileSize101mb)]
        [DisableFormValueModelBinding]
        public async Task PostAttachmentShare(string id, string attachmentId, Guid organizationId)
        {
            ValidateAttachment();

            var userId = _userService.GetProperUserId(User).Value;
            var cipher = await _cipherRepository.GetByIdAsync(new Guid(id));
            if (cipher == null || cipher.UserId != userId || !await _currentContext.OrganizationUser(organizationId))
            {
                throw new NotFoundException();
            }

            await Request.GetFileAsync(async (stream, fileName, key) =>
            {
                await _cipherService.CreateAttachmentShareAsync(cipher, stream,
                    Request.ContentLength.GetValueOrDefault(0), attachmentId, organizationId);
            });
        }

        [HttpDelete("{id}/attachment/{attachmentId}")]
        [HttpPost("{id}/attachment/{attachmentId}/delete")]
        public async Task DeleteAttachment(string id, string attachmentId)
        {
            var idGuid = new Guid(id);
            var userId = _userService.GetProperUserId(User).Value;
            var cipher = await _cipherRepository.GetByIdAsync(idGuid, userId);
            if (cipher == null)
            {
                throw new NotFoundException();
            }

            await _cipherService.DeleteAttachmentAsync(cipher, attachmentId, userId, false);
        }

        [HttpDelete("{id}/attachment/{attachmentId}/admin")]
        [HttpPost("{id}/attachment/{attachmentId}/delete-admin")]
        public async Task DeleteAttachmentAdmin(string id, string attachmentId)
        {
            var idGuid = new Guid(id);
            var userId = _userService.GetProperUserId(User).Value;
            var cipher = await _cipherRepository.GetByIdAsync(idGuid);
            if (cipher == null || !cipher.OrganizationId.HasValue ||
                !await _currentContext.EditAnyCollection(cipher.OrganizationId.Value))
            {
                throw new NotFoundException();
            }

            await _cipherService.DeleteAttachmentAsync(cipher, attachmentId, userId, true);
        }

        [AllowAnonymous]
        [HttpPost("attachment/validate/azure")]
        public async Task<ObjectResult> AzureValidateFile()
        {
            return await ApiHelpers.HandleAzureEvents(Request, new Dictionary<string, Func<EventGridEvent, Task>>
            {
                {
                    "Microsoft.Storage.BlobCreated", async (eventGridEvent) =>
                    {
                        try
                        {
                            var blobName = eventGridEvent.Subject.Split($"{AzureAttachmentStorageService.EventGridEnabledContainerName}/blobs/")[1];
                            var (cipherId, organizationId, attachmentId) = AzureAttachmentStorageService.IdentifiersFromBlobName(blobName);
                            var cipher = await _cipherRepository.GetByIdAsync(new Guid(cipherId));
                            var attachments = cipher?.GetAttachments() ?? new Dictionary<string, CipherAttachment.MetaData>();

                            if (cipher == null || !attachments.ContainsKey(attachmentId) || attachments[attachmentId].Validated)
                            {
                                if (_attachmentStorageService is AzureSendFileStorageService azureFileStorageService)
                                {
                                    await azureFileStorageService.DeleteBlobAsync(blobName);
                                }

                                return;
                            }

                            await _cipherService.ValidateCipherAttachmentFile(cipher, attachments[attachmentId]);
                        }
                        catch (Exception e)
                        {
                            _logger.LogError(e, $"Uncaught exception occurred while handling event grid event: {JsonSerializer.Serialize(eventGridEvent)}");
                            return;
                        }
                    }
                }
            });
        }

        private void ValidateAttachment()
        {
            if (!Request?.ContentType.Contains("multipart/") ?? true)
            {
                throw new BadRequestException("Invalid content.");
            }
        }
    }
}