using Umbraco.Cms.Core.PublishedCache;
using Umbraco.Cms.Infrastructure.PublishedCache.Persistence;

namespace Umbraco.Cms.Infrastructure.PublishedCache
{
    /// <summary>
    /// Generates a status report for <see cref="PublishedSnapshotService"/>
    /// </summary>
    internal class PublishedSnapshotStatus : IPublishedSnapshotStatus
    {
        private readonly PublishedSnapshotService _service;
        private readonly INuCacheContentService _publishedContentService;

        public PublishedSnapshotStatus(IPublishedSnapshotService service, INuCacheContentService publishedContentService)
        {
            _service = service as PublishedSnapshotService;
            _publishedContentService = publishedContentService;
        }

        /// <inheritdoc/>
        public virtual string StatusUrl => "views/dashboard/settings/publishedsnapshotcache.html";

        /// <inheritdoc/>
        public string GetStatus()
        {
            if (_service == null)
            {
                return $"The current {typeof(IPublishedSnapshotService)} is not the default type. A status cannot be determined.";
            } 

            // TODO: This should be private
            _service.EnsureCaches();

            var dbCacheIsOk = _publishedContentService.VerifyContentDbCache()
                && _publishedContentService.VerifyMediaDbCache()
                && _publishedContentService.VerifyMemberDbCache()
                ? "ok"
                : "NOT ok (rebuild?)";

            ContentStore contentStore = _service.GetContentStore();
            ContentStore mediaStore = _service.GetMediaStore();

            var contentStoreGen = contentStore.GenCount;
            var mediaStoreGen = mediaStore.GenCount;
            var contentStoreSnap = contentStore.SnapCount;
            var mediaStoreSnap = mediaStore.SnapCount;
            var contentStoreCount = contentStore.Count;
            var mediaStoreCount = mediaStore.Count;

            string contentStoreCountPlural = contentStoreCount > 1 ? "s" : string.Empty;
            string contentStoreGenPlural = contentStoreGen > 1 ? "s" : string.Empty;
            string contentStoreSnapPlural = contentStoreSnap > 1 ? "s" : string.Empty;
            string mediaStoreCountPlural = mediaStoreCount > 1 ? "s" : string.Empty;
            string mediaStoreGenPlural = mediaStoreGen > 1 ? "s" : string.Empty;
            string mediaStoreSnapPlural = mediaStoreSnap > 1 ? "s" : string.Empty;

            return $" Database cache is {dbCacheIsOk}. ContentStore contains {contentStoreCount} item{contentStoreCountPlural} and has {contentStoreGen} generation{contentStoreGenPlural} and {contentStoreSnap} snapshot{contentStoreSnapPlural}. MediaStore contains {mediaStoreCount} item{mediaStoreCountPlural} and has {mediaStoreGen} generation{mediaStoreGenPlural} and {mediaStoreSnap} snapshot{mediaStoreSnapPlural}.";
        }
    }
}