using AutoMapper;
using Bit.Core.Enums;
using Bit.Core.Repositories;
using Bit.Infrastructure.EntityFramework.Repositories.Queries;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;
using CollectionCipher = Bit.Core.Entities.CollectionCipher;

namespace Bit.Infrastructure.EntityFramework.Repositories;

public class CollectionCipherRepository : BaseEntityFrameworkRepository, ICollectionCipherRepository
{
    public CollectionCipherRepository(IServiceScopeFactory serviceScopeFactory, IMapper mapper)
        : base(serviceScopeFactory, mapper)
    { }

    public async Task<CollectionCipher> CreateAsync(CollectionCipher obj)
    {
        using (var scope = ServiceScopeFactory.CreateScope())
        {
            var dbContext = GetDatabaseContext(scope);
            var entity = Mapper.Map<Models.CollectionCipher>(obj);
            dbContext.Add(entity);
            await dbContext.SaveChangesAsync();
            var organizationId = (await dbContext.Ciphers.FirstOrDefaultAsync(c => c.Id.Equals(obj.CipherId))).OrganizationId;
            if (organizationId.HasValue)
            {
                await dbContext.UserBumpAccountRevisionDateByCollectionIdAsync(obj.CollectionId, organizationId.Value);
                await dbContext.SaveChangesAsync();
            }
            return obj;
        }
    }

    public async Task<ICollection<CollectionCipher>> GetManyByOrganizationIdAsync(Guid organizationId)
    {
        using (var scope = ServiceScopeFactory.CreateScope())
        {
            var dbContext = GetDatabaseContext(scope);
            var data = await (from cc in dbContext.CollectionCiphers
                              join c in dbContext.Collections
                                  on cc.CollectionId equals c.Id
                              where c.OrganizationId == organizationId
                              select cc).ToArrayAsync();
            return data;
        }
    }

    public async Task<ICollection<CollectionCipher>> GetManyByUserIdAsync(Guid userId, bool useFlexibleCollections)
    {
        using (var scope = ServiceScopeFactory.CreateScope())
        {
            var dbContext = GetDatabaseContext(scope);
            var data = await new CollectionCipherReadByUserIdQuery(userId, useFlexibleCollections)
                .Run(dbContext)
                .ToArrayAsync();
            return data;
        }
    }

    public async Task<ICollection<CollectionCipher>> GetManyByUserIdCipherIdAsync(Guid userId, Guid cipherId, bool useFlexibleCollections)
    {
        using (var scope = ServiceScopeFactory.CreateScope())
        {
            var dbContext = GetDatabaseContext(scope);
            var data = await new CollectionCipherReadByUserIdCipherIdQuery(userId, cipherId, useFlexibleCollections)
                .Run(dbContext)
                .ToArrayAsync();
            return data;
        }
    }

    public async Task UpdateCollectionsAsync(Guid cipherId, Guid userId, IEnumerable<Guid> collectionIds, bool useFlexibleCollections)
    {
        using (var scope = ServiceScopeFactory.CreateScope())
        {
            var dbContext = GetDatabaseContext(scope);

            var organizationId = await dbContext.Ciphers
                .Where(c => c.Id == cipherId)
                .Select(c => c.OrganizationId)
                .FirstAsync();

            List<Guid> availableCollections;
            if (useFlexibleCollections)
            {
                var availableCollectionsQuery = new CollectionsReadByOrganizationIdUserIdQuery(organizationId, userId);
                availableCollections = await availableCollectionsQuery
                    .Run(dbContext)
                    .Select(c => c.Id).ToListAsync();
            }
            else
            {
                availableCollections = await (from c in dbContext.Collections
                                              join o in dbContext.Organizations on c.OrganizationId equals o.Id
                                              join ou in dbContext.OrganizationUsers
                                                 on new { OrganizationId = o.Id, UserId = (Guid?)userId } equals
                                                 new { ou.OrganizationId, ou.UserId }
                                              join cu in dbContext.CollectionUsers
                                                 on new { ou.AccessAll, CollectionId = c.Id, OrganizationUserId = ou.Id } equals
                                                 new { AccessAll = false, cu.CollectionId, cu.OrganizationUserId } into cu_g
                                              from cu in cu_g.DefaultIfEmpty()
                                              join gu in dbContext.GroupUsers
                                                 on new { CollectionId = (Guid?)cu.CollectionId, ou.AccessAll, OrganizationUserId = ou.Id } equals
                                                 new { CollectionId = (Guid?)null, AccessAll = false, gu.OrganizationUserId } into gu_g
                                              from gu in gu_g.DefaultIfEmpty()
                                              join g in dbContext.Groups on gu.GroupId equals g.Id into g_g
                                              from g in g_g.DefaultIfEmpty()
                                              join cg in dbContext.CollectionGroups
                                                 on new { g.AccessAll, CollectionId = c.Id, gu.GroupId } equals
                                                 new { AccessAll = false, cg.CollectionId, cg.GroupId } into cg_g
                                              from cg in cg_g.DefaultIfEmpty()
                                              where o.Id == organizationId && o.Enabled && ou.Status == OrganizationUserStatusType.Confirmed
                                                 && (ou.AccessAll || !cu.ReadOnly || g.AccessAll || !cg.ReadOnly)
                                              select c.Id).ToListAsync();

            }

            var collectionCiphers = await (from cc in dbContext.CollectionCiphers
                                           where cc.CipherId == cipherId
                                           select cc).ToListAsync();

            foreach (var requestedCollectionId in collectionIds)
            {
                // I don't totally agree with t.CipherId = cipherId here because that should have been guaranteed by
                // the WHERE above but the SQL Server CTE has it
                var existingCollectionCipher = collectionCiphers
                    .FirstOrDefault(t => t.CollectionId == requestedCollectionId && t.CipherId == cipherId);
                // requestedCollectionId = SOURCE
                // existingCollectionCipher = TARGET

                // They have to want it selected and it has to exist
                if (existingCollectionCipher == null && availableCollections.Contains(requestedCollectionId))
                {
                    // WHEN NOT MATCHED BY TARGET AND ...
                    dbContext.CollectionCiphers.Add(new Models.CollectionCipher
                    {
                        CollectionId = requestedCollectionId,
                        CipherId = cipherId,
                    });
                }

                // If it has fallen to here it's requested but not actually available to don't add anything
            }

            // Now we need to remove collection ciphers that are no longer requested
            dbContext.CollectionCiphers.RemoveRange(collectionCiphers.Where(cc => !collectionIds.Contains(cc.CollectionId) && cc.CipherId == cipherId));

            if (organizationId.HasValue)
            {
                await dbContext.UserBumpAccountRevisionDateByOrganizationIdAsync(organizationId.Value);
            }
            await dbContext.SaveChangesAsync();
        }
    }

    public async Task UpdateCollectionsForAdminAsync(Guid cipherId, Guid organizationId, IEnumerable<Guid> collectionIds)
    {
        using (var scope = ServiceScopeFactory.CreateScope())
        {
            var dbContext = GetDatabaseContext(scope);
            var availableCollections = await (from c in dbContext.Collections
                                              where c.OrganizationId == organizationId
                                              select c).ToListAsync();

            var currentCollectionCiphers = await (from cc in dbContext.CollectionCiphers
                                                  where cc.CipherId == cipherId
                                                  select cc).ToListAsync();

            foreach (var requestedCollectionId in collectionIds)
            {
                var requestedCollectionCipher = currentCollectionCiphers
                    .FirstOrDefault(cc => cc.CollectionId == requestedCollectionId);

                if (requestedCollectionCipher == null)
                {
                    dbContext.CollectionCiphers.Add(new Models.CollectionCipher
                    {
                        CipherId = cipherId,
                        CollectionId = requestedCollectionId,
                    });
                }
            }

            dbContext.RemoveRange(currentCollectionCiphers.Where(cc => !collectionIds.Contains(cc.CollectionId)));
            await dbContext.UserBumpAccountRevisionDateByOrganizationIdAsync(organizationId);
            await dbContext.SaveChangesAsync();
        }
    }

    public async Task UpdateCollectionsForCiphersAsync(IEnumerable<Guid> cipherIds, Guid userId, Guid organizationId, IEnumerable<Guid> collectionIds, bool useFlexibleCollections)
    {
        using (var scope = ServiceScopeFactory.CreateScope())
        {
            var dbContext = GetDatabaseContext(scope);

            IQueryable<Models.Collection> availableCollections;
            if (useFlexibleCollections)
            {
                var availableCollectionsQuery = new CollectionsReadByOrganizationIdUserIdQuery(organizationId, userId);
                availableCollections = availableCollectionsQuery
                    .Run(dbContext);
            }
            else
            {
                availableCollections = from c in dbContext.Collections
                                       join o in dbContext.Organizations
                                           on c.OrganizationId equals o.Id
                                       join ou in dbContext.OrganizationUsers
                                           on o.Id equals ou.OrganizationId
                                       where ou.UserId == userId
                                       join cu in dbContext.CollectionUsers
                                           on ou.Id equals cu.OrganizationUserId into cu_g
                                       from cu in cu_g.DefaultIfEmpty()
                                       where !ou.AccessAll && cu.CollectionId == c.Id
                                       join gu in dbContext.GroupUsers
                                           on ou.Id equals gu.OrganizationUserId into gu_g
                                       from gu in gu_g.DefaultIfEmpty()
                                       where cu.CollectionId == null && !ou.AccessAll
                                       join g in dbContext.Groups
                                           on gu.GroupId equals g.Id into g_g
                                       from g in g_g.DefaultIfEmpty()
                                       join cg in dbContext.CollectionGroups
                                           on gu.GroupId equals cg.GroupId into cg_g
                                       from cg in cg_g.DefaultIfEmpty()
                                       where !g.AccessAll && cg.CollectionId == c.Id &&
                                       (o.Id == organizationId && o.Enabled && ou.Status == OrganizationUserStatusType.Confirmed &&
                                       (ou.AccessAll || !cu.ReadOnly || g.AccessAll || !cg.ReadOnly))
                                       select c;

            }

            if (await availableCollections.CountAsync() < 1)
            {
                return;
            }

            var insertData = from collectionId in collectionIds
                             from cipherId in cipherIds
                             where availableCollections.Select(c => c.Id).Contains(collectionId)
                             select new Models.CollectionCipher
                             {
                                 CollectionId = collectionId,
                                 CipherId = cipherId,
                             };
            await dbContext.AddRangeAsync(insertData);
            await dbContext.UserBumpAccountRevisionDateByOrganizationIdAsync(organizationId);
            await dbContext.SaveChangesAsync();
        }
    }
}