using System.Text.Json;
using AutoMapper;
using Bit.Core.Enums;
using Bit.Core.Enums.Provider;
using Bit.Infrastructure.EntityFramework.Models;
using Bit.Infrastructure.EntityFramework.Repositories.Queries;
using LinqToDB.Data;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;
using Cipher = Bit.Core.Entities.Cipher;
using User = Bit.Core.Entities.User;

namespace Bit.Infrastructure.EntityFramework.Repositories;

public abstract class BaseEntityFrameworkRepository
{
    protected BulkCopyOptions DefaultBulkCopyOptions { get; set; } = new BulkCopyOptions
    {
        KeepIdentity = true,
        BulkCopyType = BulkCopyType.MultipleRows,
    };

    public BaseEntityFrameworkRepository(IServiceScopeFactory serviceScopeFactory, IMapper mapper)
    {
        ServiceScopeFactory = serviceScopeFactory;
        Mapper = mapper;
    }

    protected IServiceScopeFactory ServiceScopeFactory { get; private set; }
    protected IMapper Mapper { get; private set; }

    public DatabaseContext GetDatabaseContext(IServiceScope serviceScope)
    {
        return serviceScope.ServiceProvider.GetRequiredService<DatabaseContext>();
    }

    public void ClearChangeTracking()
    {
        using (var scope = ServiceScopeFactory.CreateScope())
        {
            var dbContext = GetDatabaseContext(scope);
            dbContext.ChangeTracker.Clear();
        }
    }

    public async Task<int> GetCountFromQuery<T>(IQuery<T> query)
    {
        using (var scope = ServiceScopeFactory.CreateScope())
        {
            return await query.Run(GetDatabaseContext(scope)).CountAsync();
        }
    }

    protected async Task UserBumpAccountRevisionDateByCipherId(Cipher cipher)
    {
        var list = new List<Cipher> { cipher };
        await UserBumpAccountRevisionDateByCipherId(list);
    }

    protected async Task UserBumpAccountRevisionDateByCipherId(IEnumerable<Cipher> ciphers)
    {
        using (var scope = ServiceScopeFactory.CreateScope())
        {
            foreach (var cipher in ciphers)
            {
                var dbContext = GetDatabaseContext(scope);
                var query = new UserBumpAccountRevisionDateByCipherIdQuery(cipher);
                var users = query.Run(dbContext);

                await users.ForEachAsync(e =>
                {
                    dbContext.Attach(e);
                    e.RevisionDate = DateTime.UtcNow;
                });
                await dbContext.SaveChangesAsync();
            }
        }
    }

    protected async Task UserBumpAccountRevisionDateByOrganizationId(Guid organizationId)
    {
        using (var scope = ServiceScopeFactory.CreateScope())
        {
            var dbContext = GetDatabaseContext(scope);
            var query = new UserBumpAccountRevisionDateByOrganizationIdQuery(organizationId);
            var users = query.Run(dbContext);
            await users.ForEachAsync(e =>
            {
                dbContext.Attach(e);
                e.RevisionDate = DateTime.UtcNow;
            });
            await dbContext.SaveChangesAsync();
        }
    }

    protected async Task UserBumpAccountRevisionDate(Guid userId)
    {
        await UserBumpManyAccountRevisionDates(new[] { userId });
    }

    protected async Task UserBumpManyAccountRevisionDates(ICollection<Guid> userIds)
    {
        using (var scope = ServiceScopeFactory.CreateScope())
        {
            var dbContext = GetDatabaseContext(scope);
            var users = dbContext.Users.Where(u => userIds.Contains(u.Id));
            await users.ForEachAsync(u =>
            {
                dbContext.Attach(u);
                u.RevisionDate = DateTime.UtcNow;
            });
            await dbContext.SaveChangesAsync();
        }
    }

    protected async Task OrganizationUpdateStorage(Guid organizationId)
    {
        using (var scope = ServiceScopeFactory.CreateScope())
        {
            var dbContext = GetDatabaseContext(scope);
            var attachments = await dbContext.Ciphers
                .Where(e => e.UserId == null &&
                    e.OrganizationId == organizationId &&
                    !string.IsNullOrWhiteSpace(e.Attachments))
                .Select(e => e.Attachments)
                .ToListAsync();
            var storage = attachments.Sum(e => JsonDocument.Parse(e)?.RootElement.EnumerateObject()
                .Sum(p => p.Value.GetProperty("Size").GetInt64()) ?? 0);
            var organization = new Organization
            {
                Id = organizationId,
                RevisionDate = DateTime.UtcNow,
                Storage = storage,
            };
            dbContext.Organizations.Attach(organization);
            var entry = dbContext.Entry(organization);
            entry.Property(e => e.RevisionDate).IsModified = true;
            entry.Property(e => e.Storage).IsModified = true;
            await dbContext.SaveChangesAsync();
        }
    }

    protected async Task UserUpdateStorage(Guid userId)
    {
        using (var scope = ServiceScopeFactory.CreateScope())
        {
            var dbContext = GetDatabaseContext(scope);
            var attachments = await dbContext.Ciphers
                .Where(e => e.UserId.HasValue &&
                    e.UserId.Value == userId &&
                    e.OrganizationId == null &&
                    !string.IsNullOrWhiteSpace(e.Attachments))
                .Select(e => e.Attachments)
                .ToListAsync();
            var storage = attachments.Sum(e => JsonDocument.Parse(e)?.RootElement.EnumerateObject()
                .Sum(p => p.Value.GetProperty("Size").GetInt64()) ?? 0);
            var user = new Models.User
            {
                Id = userId,
                RevisionDate = DateTime.UtcNow,
                Storage = storage,
            };
            dbContext.Users.Attach(user);
            var entry = dbContext.Entry(user);
            entry.Property(e => e.RevisionDate).IsModified = true;
            entry.Property(e => e.Storage).IsModified = true;
            await dbContext.SaveChangesAsync();
        }
    }

    protected async Task UserUpdateKeys(User user)
    {
        using (var scope = ServiceScopeFactory.CreateScope())
        {
            var dbContext = GetDatabaseContext(scope);
            var entity = await dbContext.Users.FindAsync(user.Id);
            if (entity == null)
            {
                return;
            }
            entity.SecurityStamp = user.SecurityStamp;
            entity.Key = user.Key;
            entity.PrivateKey = user.PrivateKey;
            entity.RevisionDate = DateTime.UtcNow;
            await dbContext.SaveChangesAsync();
        }
    }

    protected async Task UserBumpAccountRevisionDateByCollectionId(Guid collectionId, Guid organizationId)
    {
        using (var scope = ServiceScopeFactory.CreateScope())
        {
            var dbContext = GetDatabaseContext(scope);
            var query = from u in dbContext.Users
                        join ou in dbContext.OrganizationUsers
                            on u.Id equals ou.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.Equals(collectionId)
                        join gu in dbContext.GroupUsers
                            on ou.Id equals gu.OrganizationUserId into gu_g
                        from gu in gu_g.DefaultIfEmpty()
                        where cu.CollectionId == default(Guid) && !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 == collectionId &&
                            (ou.OrganizationId == organizationId && ou.Status == OrganizationUserStatusType.Confirmed &&
                            (cu.CollectionId != default(Guid) || cg.CollectionId != default(Guid) || ou.AccessAll || g.AccessAll))
                        select new { u, ou, cu, gu, g, cg };
            var users = query.Select(x => x.u);
            await users.ForEachAsync(u =>
            {
                dbContext.Attach(u);
                u.RevisionDate = DateTime.UtcNow;
            });
            await dbContext.SaveChangesAsync();
        }
    }

    protected async Task UserBumpAccountRevisionDateByOrganizationUserId(Guid organizationUserId)
    {
        using (var scope = ServiceScopeFactory.CreateScope())
        {
            var dbContext = GetDatabaseContext(scope);
            var query = from u in dbContext.Users
                        join ou in dbContext.OrganizationUsers
                            on u.Id equals ou.UserId
                        where ou.Id.Equals(organizationUserId) && ou.Status.Equals(OrganizationUserStatusType.Confirmed)
                        select new { u, ou };
            var users = query.Select(x => x.u);
            await users.ForEachAsync(u =>
            {
                dbContext.Attach(u);
                u.AccountRevisionDate = DateTime.UtcNow;
            });
            await dbContext.SaveChangesAsync();
        }
    }

    protected async Task UserBumpAccountRevisionDateByProviderUserIds(ICollection<Guid> providerUserIds)
    {
        using (var scope = ServiceScopeFactory.CreateScope())
        {
            var dbContext = GetDatabaseContext(scope);
            var query = from pu in dbContext.ProviderUsers
                        join u in dbContext.Users
                            on pu.UserId equals u.Id
                        where pu.Status.Equals(ProviderUserStatusType.Confirmed) &&
                            providerUserIds.Contains(pu.Id)
                        select new { pu, u };
            var users = query.Select(x => x.u);
            await users.ForEachAsync(u =>
            {
                dbContext.Attach(u);
                u.AccountRevisionDate = DateTime.UtcNow;
            });
            await dbContext.SaveChangesAsync();
        }
    }
}