using System.Data;
using System.Diagnostics.CodeAnalysis;
using System.Text.Json;
using Bit.Core.Entities;
using Bit.Core.Enums;
using Bit.Core.Models.Data;
using Bit.Core.Repositories;
using Bit.Core.Settings;
using Bit.Core.Utilities;
using Bit.Infrastructure.Dapper.AdminConsole.Helpers;
using Dapper;
using Microsoft.Data.SqlClient;

#nullable enable

namespace Bit.Infrastructure.Dapper.Repositories;

public class CollectionRepository : Repository<Collection, Guid>, ICollectionRepository
{
    public CollectionRepository(GlobalSettings globalSettings)
        : this(globalSettings.SqlServer.ConnectionString, globalSettings.SqlServer.ReadOnlyConnectionString)
    { }

    public CollectionRepository(string connectionString, string readOnlyConnectionString)
        : base(connectionString, readOnlyConnectionString)
    { }

    public async Task<int> GetCountByOrganizationIdAsync(Guid organizationId)
    {
        using (var connection = new SqlConnection(ConnectionString))
        {
            var results = await connection.ExecuteScalarAsync<int>(
                "[dbo].[Collection_ReadCountByOrganizationId]",
                new { OrganizationId = organizationId },
                commandType: CommandType.StoredProcedure);

            return results;
        }
    }

    public async Task<Tuple<Collection?, CollectionAccessDetails>> GetByIdWithAccessAsync(Guid id)
    {
        using (var connection = new SqlConnection(ConnectionString))
        {
            var results = await connection.QueryMultipleAsync(
                $"[{Schema}].[Collection_ReadWithGroupsAndUsersById]",
                new { Id = id },
                commandType: CommandType.StoredProcedure);

            var collection = await results.ReadFirstOrDefaultAsync<Collection>();
            var groups = (await results.ReadAsync<CollectionAccessSelection>()).ToList();
            var users = (await results.ReadAsync<CollectionAccessSelection>()).ToList();
            var access = new CollectionAccessDetails { Groups = groups, Users = users };

            return new Tuple<Collection?, CollectionAccessDetails>(collection, access);
        }
    }

    public async Task<ICollection<Collection>> GetManyByManyIdsAsync(IEnumerable<Guid> collectionIds)
    {
        using (var connection = new SqlConnection(ConnectionString))
        {
            var results = await connection.QueryAsync<Collection>(
                $"[{Schema}].[Collection_ReadByIds]",
                new { Ids = collectionIds.ToGuidIdArrayTVP() },
                commandType: CommandType.StoredProcedure);

            return results.ToList();
        }
    }

    public async Task<ICollection<Collection>> GetManyByOrganizationIdAsync(Guid organizationId)
    {
        using (var connection = new SqlConnection(ConnectionString))
        {
            var results = await connection.QueryAsync<Collection>(
                $"[{Schema}].[{Table}_ReadByOrganizationId]",
                new { OrganizationId = organizationId },
                commandType: CommandType.StoredProcedure);

            return results.ToList();
        }
    }

    public async Task<ICollection<Collection>> GetManySharedCollectionsByOrganizationIdAsync(Guid organizationId)
    {
        using (var connection = new SqlConnection(ConnectionString))
        {
            var results = await connection.QueryAsync<Collection>(
                $"[{Schema}].[{Table}_ReadSharedCollectionsByOrganizationId]",
                new { OrganizationId = organizationId },
                commandType: CommandType.StoredProcedure);

            return results.ToList();
        }
    }

    public async Task<ICollection<Tuple<Collection, CollectionAccessDetails>>> GetManyByOrganizationIdWithAccessAsync(Guid organizationId)
    {
        using (var connection = new SqlConnection(ConnectionString))
        {
            var results = await connection.QueryMultipleAsync(
                $"[{Schema}].[Collection_ReadWithGroupsAndUsersByOrganizationId]",
                new { OrganizationId = organizationId },
                commandType: CommandType.StoredProcedure);

            var collections = (await results.ReadAsync<Collection>());
            var groups = (await results.ReadAsync<CollectionGroup>())
                .GroupBy(g => g.CollectionId);
            var users = (await results.ReadAsync<CollectionUser>())
                .GroupBy(u => u.CollectionId);

            return collections.Select(collection =>
                new Tuple<Collection, CollectionAccessDetails>(
                    collection,
                    new CollectionAccessDetails
                    {
                        Groups = groups
                            .FirstOrDefault(g => g.Key == collection.Id)?
                            .Select(g => new CollectionAccessSelection
                            {
                                Id = g.GroupId,
                                HidePasswords = g.HidePasswords,
                                ReadOnly = g.ReadOnly,
                                Manage = g.Manage
                            }).ToList() ?? new List<CollectionAccessSelection>(),
                        Users = users
                            .FirstOrDefault(u => u.Key == collection.Id)?
                            .Select(c => new CollectionAccessSelection
                            {
                                Id = c.OrganizationUserId,
                                HidePasswords = c.HidePasswords,
                                ReadOnly = c.ReadOnly,
                                Manage = c.Manage
                            }).ToList() ?? new List<CollectionAccessSelection>()
                    }
                )
            ).ToList();
        }
    }

    public async Task<ICollection<CollectionDetails>> GetManyByUserIdAsync(Guid userId)
    {
        using (var connection = new SqlConnection(ConnectionString))
        {
            var results = await connection.QueryAsync<CollectionDetails>(
                $"[{Schema}].[Collection_ReadByUserId]",
                new { UserId = userId },
                commandType: CommandType.StoredProcedure);

            return results.ToList();
        }
    }

    public async Task<ICollection<CollectionAdminDetails>> GetManyByOrganizationIdWithPermissionsAsync(Guid organizationId, Guid userId, bool includeAccessRelationships)
    {
        using (var connection = new SqlConnection(ConnectionString))
        {
            var results = await connection.QueryMultipleAsync(
                $"[{Schema}].[Collection_ReadByOrganizationIdWithPermissions]",
                new { OrganizationId = organizationId, UserId = userId, IncludeAccessRelationships = includeAccessRelationships },
                commandType: CommandType.StoredProcedure);

            var collections = (await results.ReadAsync<CollectionAdminDetails>()).ToList();

            if (!includeAccessRelationships)
            {
                return collections;
            }

            var groups = (await results.ReadAsync<CollectionGroup>())
                .GroupBy(g => g.CollectionId)
                .ToList();
            var users = (await results.ReadAsync<CollectionUser>())
                .GroupBy(u => u.CollectionId)
                .ToList();

            foreach (var collection in collections)
            {
                collection.Groups = groups
                    .FirstOrDefault(g => g.Key == collection.Id)?
                    .Select(g => new CollectionAccessSelection
                    {
                        Id = g.GroupId,
                        HidePasswords = g.HidePasswords,
                        ReadOnly = g.ReadOnly,
                        Manage = g.Manage
                    }).ToList() ?? new List<CollectionAccessSelection>();
                collection.Users = users
                    .FirstOrDefault(u => u.Key == collection.Id)?
                    .Select(c => new CollectionAccessSelection
                    {
                        Id = c.OrganizationUserId,
                        HidePasswords = c.HidePasswords,
                        ReadOnly = c.ReadOnly,
                        Manage = c.Manage
                    }).ToList() ?? new List<CollectionAccessSelection>();
            }

            return collections;
        }
    }

    public async Task<CollectionAdminDetails?> GetByIdWithPermissionsAsync(Guid collectionId, Guid? userId, bool includeAccessRelationships)
    {
        using (var connection = new SqlConnection(ConnectionString))
        {
            var results = await connection.QueryMultipleAsync(
                $"[{Schema}].[Collection_ReadByIdWithPermissions]",
                new { CollectionId = collectionId, UserId = userId, IncludeAccessRelationships = includeAccessRelationships },
                commandType: CommandType.StoredProcedure);

            var collectionDetails = await results.ReadFirstOrDefaultAsync<CollectionAdminDetails>();

            if (!includeAccessRelationships || collectionDetails == null) return collectionDetails;

            // TODO-NRE: collectionDetails should be checked for null and probably return early
            collectionDetails!.Groups = (await results.ReadAsync<CollectionAccessSelection>()).ToList();
            collectionDetails.Users = (await results.ReadAsync<CollectionAccessSelection>()).ToList();

            return collectionDetails;
        }
    }

    public async Task CreateAsync(Collection obj, IEnumerable<CollectionAccessSelection>? groups, IEnumerable<CollectionAccessSelection>? users)
    {
        obj.SetNewId();


        var objWithGroupsAndUsers = JsonSerializer.Deserialize<CollectionWithGroupsAndUsers>(JsonSerializer.Serialize(obj))!;

        objWithGroupsAndUsers.Groups = groups != null ? groups.ToArrayTVP() : Enumerable.Empty<CollectionAccessSelection>().ToArrayTVP();
        objWithGroupsAndUsers.Users = users != null ? users.ToArrayTVP() : Enumerable.Empty<CollectionAccessSelection>().ToArrayTVP();

        using (var connection = new SqlConnection(ConnectionString))
        {
            var results = await connection.ExecuteAsync(
                $"[{Schema}].[Collection_CreateWithGroupsAndUsers]",
                objWithGroupsAndUsers,
                commandType: CommandType.StoredProcedure);
        }
    }

    public async Task ReplaceAsync(Collection obj, IEnumerable<CollectionAccessSelection>? groups, IEnumerable<CollectionAccessSelection>? users)
    {
        var objWithGroupsAndUsers = JsonSerializer.Deserialize<CollectionWithGroupsAndUsers>(JsonSerializer.Serialize(obj))!;

        objWithGroupsAndUsers.Groups = groups != null ? groups.ToArrayTVP() : Enumerable.Empty<CollectionAccessSelection>().ToArrayTVP();
        objWithGroupsAndUsers.Users = users != null ? users.ToArrayTVP() : Enumerable.Empty<CollectionAccessSelection>().ToArrayTVP();

        using (var connection = new SqlConnection(ConnectionString))
        {
            var results = await connection.ExecuteAsync(
                $"[{Schema}].[Collection_UpdateWithGroupsAndUsers]",
                objWithGroupsAndUsers,
                commandType: CommandType.StoredProcedure);
        }
    }

    public async Task DeleteManyAsync(IEnumerable<Guid> collectionIds)
    {
        using (var connection = new SqlConnection(ConnectionString))
        {
            await connection.ExecuteAsync("[dbo].[Collection_DeleteByIds]",
                new { Ids = collectionIds.ToGuidIdArrayTVP() }, commandType: CommandType.StoredProcedure);
        }
    }

    public async Task CreateOrUpdateAccessForManyAsync(Guid organizationId, IEnumerable<Guid> collectionIds,
        IEnumerable<CollectionAccessSelection> users, IEnumerable<CollectionAccessSelection> groups)
    {
        using (var connection = new SqlConnection(ConnectionString))
        {
            var usersArray = users != null ? users.ToArrayTVP() : Enumerable.Empty<CollectionAccessSelection>().ToArrayTVP();
            var groupsArray = groups != null ? groups.ToArrayTVP() : Enumerable.Empty<CollectionAccessSelection>().ToArrayTVP();

            var results = await connection.ExecuteAsync(
                $"[{Schema}].[Collection_CreateOrUpdateAccessForMany]",
                new { OrganizationId = organizationId, CollectionIds = collectionIds.ToGuidIdArrayTVP(), Users = usersArray, Groups = groupsArray },
                commandType: CommandType.StoredProcedure);
        }
    }

    public async Task CreateUserAsync(Guid collectionId, Guid organizationUserId)
    {
        using (var connection = new SqlConnection(ConnectionString))
        {
            var results = await connection.ExecuteAsync(
                $"[{Schema}].[CollectionUser_Create]",
                new { CollectionId = collectionId, OrganizationUserId = organizationUserId },
                commandType: CommandType.StoredProcedure);
        }
    }

    public async Task DeleteUserAsync(Guid collectionId, Guid organizationUserId)
    {
        using (var connection = new SqlConnection(ConnectionString))
        {
            var results = await connection.ExecuteAsync(
                $"[{Schema}].[CollectionUser_Delete]",
                new { CollectionId = collectionId, OrganizationUserId = organizationUserId },
                commandType: CommandType.StoredProcedure);
        }
    }

    public async Task UpdateUsersAsync(Guid id, IEnumerable<CollectionAccessSelection> users)
    {
        using (var connection = new SqlConnection(ConnectionString))
        {
            var results = await connection.ExecuteAsync(
                $"[{Schema}].[CollectionUser_UpdateUsers]",
                new { CollectionId = id, Users = users.ToArrayTVP() },
                commandType: CommandType.StoredProcedure);
        }
    }

    public async Task<ICollection<CollectionAccessSelection>> GetManyUsersByIdAsync(Guid id)
    {
        using (var connection = new SqlConnection(ConnectionString))
        {
            var results = await connection.QueryAsync<CollectionAccessSelection>(
                $"[{Schema}].[CollectionUser_ReadByCollectionId]",
                new { CollectionId = id },
                commandType: CommandType.StoredProcedure);

            return results.ToList();
        }
    }

    public async Task UpsertDefaultCollectionsAsync(Guid organizationId, IEnumerable<Guid> organizationUserIds, string defaultCollectionName)
    {
        organizationUserIds = organizationUserIds.ToList();
        if (!organizationUserIds.Any())
        {
            return;
        }

        await using var connection = new SqlConnection(ConnectionString);
        connection.Open();
        await using var transaction = connection.BeginTransaction();
        try
        {
            var orgUserIdWithDefaultCollection = await GetOrgUserIdsWithDefaultCollectionAsync(connection, transaction, organizationId);

            var missingDefaultCollectionUserIds = organizationUserIds.Except(orgUserIdWithDefaultCollection);

            var (collectionUsers, collections) = BuildDefaultCollectionForUsers(organizationId, missingDefaultCollectionUserIds, defaultCollectionName);

            if (!collectionUsers.Any() || !collections.Any())
            {
                return;
            }

            await BulkResourceCreationService.CreateCollectionsAsync(connection, transaction, collections);
            await BulkResourceCreationService.CreateCollectionsUsersAsync(connection, transaction, collectionUsers);

            transaction.Commit();
        }
        catch
        {
            transaction.Rollback();
            throw;
        }
    }

    private async Task<HashSet<Guid>> GetOrgUserIdsWithDefaultCollectionAsync(SqlConnection connection, SqlTransaction transaction, Guid organizationId)
    {
        const string sql = @"
                    SELECT
                        ou.Id AS OrganizationUserId
                    FROM
                        OrganizationUser ou
                    INNER JOIN
                        CollectionUser cu ON cu.OrganizationUserId = ou.Id
                    INNER JOIN
                        Collection c ON c.Id = cu.CollectionId
                    WHERE
                        ou.OrganizationId = @OrganizationId
                        AND c.Type = @CollectionType;
                ";

        var organizationUserIds = await connection.QueryAsync<Guid>(
            sql,
            new { OrganizationId = organizationId, CollectionType = CollectionType.DefaultUserCollection },
            transaction: transaction
        );

        return organizationUserIds.ToHashSet();
    }

    private (List<CollectionUser> collectionUser, List<Collection> collection) BuildDefaultCollectionForUsers(Guid organizationId, IEnumerable<Guid> missingDefaultCollectionUserIds, string defaultCollectionName)
    {
        var collectionUsers = new List<CollectionUser>();
        var collections = new List<Collection>();

        foreach (var orgUserId in missingDefaultCollectionUserIds)
        {
            var collectionId = CoreHelpers.GenerateComb();

            collections.Add(new Collection
            {
                Id = collectionId,
                OrganizationId = organizationId,
                Name = defaultCollectionName,
                CreationDate = DateTime.UtcNow,
                RevisionDate = DateTime.UtcNow,
                Type = CollectionType.DefaultUserCollection,
                DefaultUserCollectionEmail = null

            });

            collectionUsers.Add(new CollectionUser
            {
                CollectionId = collectionId,
                OrganizationUserId = orgUserId,
                ReadOnly = false,
                HidePasswords = false,
                Manage = true,
            });
        }

        return (collectionUsers, collections);
    }

    public class CollectionWithGroupsAndUsers : Collection
    {
        [DisallowNull]
        public DataTable? Groups { get; set; }
        [DisallowNull]
        public DataTable? Users { get; set; }
    }
}