using NPoco;
using Umbraco.Cms.Core;
using Umbraco.Cms.Core.Models;
using Umbraco.Cms.Core.Persistence.Repositories;
using Umbraco.Cms.Infrastructure.Persistence.Dtos;
using Umbraco.Cms.Infrastructure.Scoping;
using Umbraco.Extensions;

namespace Umbraco.Cms.Infrastructure.Persistence.Repositories.Implement;

internal class DocumentVersionRepository : IDocumentVersionRepository
{
    private readonly IScopeAccessor _scopeAccessor;

    public DocumentVersionRepository(IScopeAccessor scopeAccessor) =>
        _scopeAccessor = scopeAccessor ?? throw new ArgumentNullException(nameof(scopeAccessor));

    /// <inheritdoc />
    /// <remarks>
    ///     Never includes current draft version. <br />
    ///     Never includes current published version.<br />
    ///     Never includes versions marked as "preventCleanup".<br />
    /// </remarks>
    public IReadOnlyCollection<ContentVersionMeta>? GetDocumentVersionsEligibleForCleanup()
    {
        Sql<ISqlContext>? query = _scopeAccessor.AmbientScope?.SqlContext.Sql();

        query?.Select(@"umbracoDocument.nodeId as contentId,
                           umbracoContent.contentTypeId as contentTypeId,
                           umbracoContentVersion.id as versionId,
                           umbracoContentVersion.userId as userId,
                           umbracoContentVersion.versionDate as versionDate,
                           umbracoDocumentVersion.published as currentPublishedVersion,
                           umbracoContentVersion.[current] as currentDraftVersion,
                           umbracoContentVersion.preventCleanup as preventCleanup,
                           umbracoUser.userName as username")
            .From<DocumentDto>()
            .InnerJoin<ContentDto>()
            .On<DocumentDto, ContentDto>(left => left.NodeId, right => right.NodeId)
            .InnerJoin<ContentVersionDto>()
            .On<ContentDto, ContentVersionDto>(left => left.NodeId, right => right.NodeId)
            .InnerJoin<DocumentVersionDto>()
            .On<ContentVersionDto, DocumentVersionDto>(left => left.Id, right => right.Id)
            .LeftJoin<UserDto>()
            .On<UserDto, ContentVersionDto>(left => left.Id, right => right.UserId)
            .Where<ContentVersionDto>(x => !x.Current) // Never delete current draft version
            .Where<ContentVersionDto>(x => !x.PreventCleanup) // Never delete "pinned" versions
            .Where<DocumentVersionDto>(x => !x.Published); // Never delete published version

        return _scopeAccessor.AmbientScope?.Database.Fetch<ContentVersionMeta>(query);
    }

    /// <inheritdoc />
    public IReadOnlyCollection<ContentVersionCleanupPolicySettings>? GetCleanupPolicies()
    {
        Sql<ISqlContext>? query = _scopeAccessor.AmbientScope?.SqlContext.Sql();

        query?.Select<ContentVersionCleanupPolicyDto>()
            .From<ContentVersionCleanupPolicyDto>();

        return _scopeAccessor.AmbientScope?.Database.Fetch<ContentVersionCleanupPolicySettings>(query);
    }

    /// <inheritdoc />
    public IEnumerable<ContentVersionMeta>? GetPagedItemsByContentId(int contentId, long pageIndex, int pageSize, out long totalRecords, int? languageId = null)
    {
        Sql<ISqlContext>? query = _scopeAccessor.AmbientScope?.SqlContext.Sql();

        query?.Select(@"umbracoDocument.nodeId as contentId,
                           umbracoContent.contentTypeId as contentTypeId,
                           umbracoContentVersion.id as versionId,
                           umbracoContentVersion.userId as userId,
                           umbracoContentVersion.versionDate as versionDate,
                           umbracoDocumentVersion.published as currentPublishedVersion,
                           umbracoContentVersion.[current] as currentDraftVersion,
                           umbracoContentVersion.preventCleanup as preventCleanup,
                           umbracoUser.userName as username")
            .From<DocumentDto>()
            .InnerJoin<ContentDto>()
            .On<DocumentDto, ContentDto>(left => left.NodeId, right => right.NodeId)
            .InnerJoin<ContentVersionDto>()
            .On<ContentDto, ContentVersionDto>(left => left.NodeId, right => right.NodeId)
            .InnerJoin<DocumentVersionDto>()
            .On<ContentVersionDto, DocumentVersionDto>(left => left.Id, right => right.Id)
            .LeftJoin<UserDto>()
            .On<UserDto, ContentVersionDto>(left => left.Id, right => right.UserId)
            .LeftJoin<ContentVersionCultureVariationDto>()
            .On<ContentVersionCultureVariationDto, ContentVersionDto>(left => left.VersionId, right => right.Id)
            .Where<ContentVersionDto>(x => x.NodeId == contentId);

        // TODO: If there's not a better way to write this then we need a better way to write this.
        query = languageId.HasValue
            ? query?.Where<ContentVersionCultureVariationDto>(x => x.LanguageId == languageId.Value)
            : query?.Where("umbracoContentVersionCultureVariation.languageId is null");

        query = query?.OrderByDescending<ContentVersionDto>(x => x.Id);

        Page<ContentVersionMeta>? page =
            _scopeAccessor.AmbientScope?.Database.Page<ContentVersionMeta>(pageIndex + 1, pageSize, query);

        totalRecords = page?.TotalItems ?? 0;

        return page?.Items;
    }

    /// <inheritdoc />
    /// <remarks>
    ///     Deletes in batches of <see cref="Constants.Sql.MaxParameterCount" />
    /// </remarks>
    public void DeleteVersions(IEnumerable<int> versionIds)
    {
        foreach (IEnumerable<int> group in versionIds.InGroupsOf(Constants.Sql.MaxParameterCount))
        {
            var groupedVersionIds = group.ToList();

            /* Note: We had discussed doing this in a single SQL Command.
            *  If you can work out how to make that work with SQL CE, let me know!
            *  Can use test PerformContentVersionCleanup_WithNoKeepPeriods_DeletesEverythingExceptActive to try things out.
            */

            Sql<ISqlContext>? query = _scopeAccessor.AmbientScope?.SqlContext.Sql()
                .Delete<PropertyDataDto>()
                .WhereIn<PropertyDataDto>(x => x.VersionId, groupedVersionIds);
            _scopeAccessor.AmbientScope?.Database.Execute(query);

            query = _scopeAccessor.AmbientScope?.SqlContext.Sql()
                .Delete<ContentVersionCultureVariationDto>()
                .WhereIn<ContentVersionCultureVariationDto>(x => x.VersionId, groupedVersionIds);
            _scopeAccessor.AmbientScope?.Database.Execute(query);

            query = _scopeAccessor.AmbientScope?.SqlContext.Sql()
                .Delete<DocumentVersionDto>()
                .WhereIn<DocumentVersionDto>(x => x.Id, groupedVersionIds);
            _scopeAccessor.AmbientScope?.Database.Execute(query);

            query = _scopeAccessor.AmbientScope?.SqlContext.Sql()
                .Delete<ContentVersionDto>()
                .WhereIn<ContentVersionDto>(x => x.Id, groupedVersionIds);
            _scopeAccessor.AmbientScope?.Database.Execute(query);
        }
    }

    /// <inheritdoc />
    public void SetPreventCleanup(int versionId, bool preventCleanup)
    {
        Sql<ISqlContext>? query = _scopeAccessor.AmbientScope?.SqlContext.Sql()
            .Update<ContentVersionDto>(x => x.Set(y => y.PreventCleanup, preventCleanup))
            .Where<ContentVersionDto>(x => x.Id == versionId);

        _scopeAccessor.AmbientScope?.Database.Execute(query);
    }

    /// <inheritdoc />
    public ContentVersionMeta? Get(int versionId)
    {
        Sql<ISqlContext>? query = _scopeAccessor.AmbientScope?.SqlContext.Sql();

        query?.Select(@"umbracoDocument.nodeId as contentId,
                           umbracoContent.contentTypeId as contentTypeId,
                           umbracoContentVersion.id as versionId,
                           umbracoContentVersion.userId as userId,
                           umbracoContentVersion.versionDate as versionDate,
                           umbracoDocumentVersion.published as currentPublishedVersion,
                           umbracoContentVersion.[current] as currentDraftVersion,
                           umbracoContentVersion.preventCleanup as preventCleanup,
                           umbracoUser.userName as username")
            .From<DocumentDto>()
            .InnerJoin<ContentDto>()
            .On<DocumentDto, ContentDto>(left => left.NodeId, right => right.NodeId)
            .InnerJoin<ContentVersionDto>()
            .On<ContentDto, ContentVersionDto>(left => left.NodeId, right => right.NodeId)
            .InnerJoin<DocumentVersionDto>()
            .On<ContentVersionDto, DocumentVersionDto>(left => left.Id, right => right.Id)
            .LeftJoin<UserDto>()
            .On<UserDto, ContentVersionDto>(left => left.Id, right => right.UserId)
            .Where<ContentVersionDto>(x => x.Id == versionId);

        return _scopeAccessor.AmbientScope?.Database.Single<ContentVersionMeta>(query);
    }
}