using System;
using System.Collections.Generic;
using System.Data;
using Examine;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Options;
using Umbraco.Cms.Core;
using Umbraco.Cms.Core.Configuration.Models;
using Umbraco.Cms.Core.Models.PublishedContent;
using Umbraco.Cms.Core.PublishedCache;
using Umbraco.Cms.Core.Routing;
using Umbraco.Cms.Core.Services;
using Umbraco.Cms.Core.Web;
using Umbraco.Cms.Web.Common.DependencyInjection;

namespace Umbraco.Extensions
{
    public static class FriendlyPublishedContentExtensions
    {
        private static IVariationContextAccessor VariationContextAccessor { get; } =
            StaticServiceProvider.Instance.GetRequiredService<IVariationContextAccessor>();

        private static IPublishedModelFactory PublishedModelFactory { get; } =
            StaticServiceProvider.Instance.GetRequiredService<IPublishedModelFactory>();

        private static IPublishedUrlProvider PublishedUrlProvider { get; } =
            StaticServiceProvider.Instance.GetRequiredService<IPublishedUrlProvider>();

        private static IUserService UserService { get; } =
            StaticServiceProvider.Instance.GetRequiredService<IUserService>();

        private static IUmbracoContextAccessor UmbracoContextAccessor { get; } =
            StaticServiceProvider.Instance.GetRequiredService<IUmbracoContextAccessor>();

        private static ISiteDomainHelper SiteDomainHelper { get; } =
            StaticServiceProvider.Instance.GetRequiredService<ISiteDomainHelper>();

        private static IExamineManager ExamineManager { get; } =
            StaticServiceProvider.Instance.GetRequiredService<IExamineManager>();

        private static IFileService FileService { get; } =
            StaticServiceProvider.Instance.GetRequiredService<IFileService>();

        private static IOptions<WebRoutingSettings> WebRoutingSettings { get; } =
            StaticServiceProvider.Instance.GetRequiredService<IOptions<WebRoutingSettings>>();

        private static IContentTypeService ContentTypeService { get; } =
            StaticServiceProvider.Instance.GetRequiredService<IContentTypeService>();

        private static IPublishedValueFallback PublishedValueFallback { get; } =
            StaticServiceProvider.Instance.GetRequiredService<IPublishedValueFallback>();

        private static IPublishedSnapshot PublishedSnapshot { get; } =
            StaticServiceProvider.Instance.GetRequiredService<IPublishedSnapshot>();


        private static IMediaTypeService MediaTypeService { get; } =
            StaticServiceProvider.Instance.GetRequiredService<IMediaTypeService>();


        private static IMemberTypeService MemberTypeService { get; } =
            StaticServiceProvider.Instance.GetRequiredService<IMemberTypeService>();


        /// <summary>
        /// Creates a strongly typed published content model for an internal published content.
        /// </summary>
        /// <param name="content">The internal published content.</param>
        /// <returns>The strongly typed published content model.</returns>
        public static IPublishedContent CreateModel(
            this IPublishedContent content)
            => content.CreateModel(PublishedModelFactory);

        /// <summary>
        /// Gets the name of the content item.
        /// </summary>
        /// <param name="content">The content item.</param>
        /// <param name="culture">The specific culture to get the name for. If null is used the current culture is used (Default is null).</param>
        public static string Name(
            this IPublishedContent content,
            string culture = null)
            => content.Name(VariationContextAccessor, culture);

        /// <summary>
        /// Gets the URL segment of the content item.
        /// </summary>
        /// <param name="content">The content item.</param>
        /// <param name="culture">The specific culture to get the URL segment for. If null is used the current culture is used (Default is null).</param>
        public static string UrlSegment(
            this IPublishedContent content,
            string culture = null)
            => content.UrlSegment(VariationContextAccessor, culture);

        /// <summary>
        /// Gets the culture date of the content item.
        /// </summary>
        /// <param name="content">The content item.</param>
        /// <param name="culture">The specific culture to get the name for. If null is used the current culture is used (Default is null).</param>
        public static DateTime CultureDate(
            this IPublishedContent content,
            string culture = null)
            => content.CultureDate(VariationContextAccessor, culture);

        /// <summary>
        /// Returns the current template Alias
        /// </summary>
        /// <returns>Empty string if none is set.</returns>
        public static string GetTemplateAlias(this IPublishedContent content)
            => content.GetTemplateAlias(FileService);

        public static bool IsAllowedTemplate(this IPublishedContent content, int templateId)
            => content.IsAllowedTemplate(ContentTypeService, WebRoutingSettings.Value, templateId);

        public static bool IsAllowedTemplate(
            this IPublishedContent content,
            bool disableAlternativeTemplates,
            bool validateAlternativeTemplates,
            int templateId)
            => content.IsAllowedTemplate(
                ContentTypeService,
                disableAlternativeTemplates,
                validateAlternativeTemplates,
                templateId);

        public static bool IsAllowedTemplate(
            this IPublishedContent content,
            bool disableAlternativeTemplates,
            bool validateAlternativeTemplates,
            string templateAlias)
            => content.IsAllowedTemplate(
                FileService,
                ContentTypeService,
                disableAlternativeTemplates,
                validateAlternativeTemplates,
                templateAlias);


        /// <summary>
        /// Gets a value indicating whether the content has a value for a property identified by its alias.
        /// </summary>
        /// <param name="content">The content.</param>
        /// <param name="alias">The property alias.</param>
        /// <param name="culture">The variation language.</param>
        /// <param name="segment">The variation segment.</param>
        /// <param name="fallback">Optional fallback strategy.</param>
        /// <returns>A value indicating whether the content has a value for the property identified by the alias.</returns>
        /// <remarks>Returns true if HasValue is true, or a fallback strategy can provide a value.</remarks>
        public static bool HasValue(
            this IPublishedContent content,
            string alias,
            string culture = null,
            string segment = null,
            Fallback fallback = default)
            =>
            content.HasValue(PublishedValueFallback, alias, culture, segment, fallback);

        /// <summary>
        /// Gets the value of a content's property identified by its alias, if it exists, otherwise a default value.
        /// </summary>
        /// <param name="content">The content.</param>
        /// <param name="alias">The property alias.</param>
        /// <param name="culture">The variation language.</param>
        /// <param name="segment">The variation segment.</param>
        /// <param name="fallback">Optional fallback strategy.</param>
        /// <param name="defaultValue">The default value.</param>
        /// <returns>The value of the content's property identified by the alias, if it exists, otherwise a default value.</returns>
        public static object Value(this IPublishedContent content, string alias, string culture = null, string segment = null, Fallback fallback = default, object defaultValue = default)
        => content.Value(PublishedValueFallback, alias, culture, segment, fallback, defaultValue);

        /// <summary>
        /// Gets the value of a content's property identified by its alias, converted to a specified type.
        /// </summary>
        /// <typeparam name="T">The target property type.</typeparam>
        /// <param name="content">The content.</param>
        /// <param name="alias">The property alias.</param>
        /// <param name="culture">The variation language.</param>
        /// <param name="segment">The variation segment.</param>
        /// <param name="fallback">Optional fallback strategy.</param>
        /// <param name="defaultValue">The default value.</param>
        /// <returns>The value of the content's property identified by the alias, converted to the specified type.</returns>
        public static T Value<T>(this IPublishedContent content, string alias, string culture = null, string segment = null, Fallback fallback = default, T defaultValue = default)
            => content.Value<T>(PublishedValueFallback, alias, culture, segment, fallback, defaultValue);

        /// <summary>
        /// Returns all DescendantsOrSelf of all content referenced
        /// </summary>
        /// <param name="parentNodes"></param>
        /// <param name="docTypeAlias"></param>
        /// <param name="culture">The specific culture to filter for. If null is used the current culture is used. (Default is null)</param>
        /// <returns></returns>
        /// <remarks>
        /// This can be useful in order to return all nodes in an entire site by a type when combined with TypedContentAtRoot
        /// </remarks>
        public static IEnumerable<IPublishedContent> DescendantsOrSelfOfType(
            this IEnumerable<IPublishedContent> parentNodes, string docTypeAlias, string culture = null)
            => parentNodes.DescendantsOrSelfOfType(VariationContextAccessor, docTypeAlias, culture);

        /// <summary>
        /// Returns all DescendantsOrSelf of all content referenced
        /// </summary>
        /// <param name="parentNodes"></param>
        /// <param name="variationContextAccessor">Variation context accessor.</param>
        /// <param name="culture">The specific culture to filter for. If null is used the current culture is used. (Default is null)</param>
        /// <returns></returns>
        /// <remarks>
        /// This can be useful in order to return all nodes in an entire site by a type when combined with TypedContentAtRoot
        /// </remarks>
        public static IEnumerable<T> DescendantsOrSelf<T>(
            this IEnumerable<IPublishedContent> parentNodes,
            string culture = null)
            where T : class, IPublishedContent
            => parentNodes.DescendantsOrSelf<T>(VariationContextAccessor, culture);

        public static IEnumerable<IPublishedContent> Descendants(this IPublishedContent content, string culture = null)
            => content.Descendants(VariationContextAccessor, culture);

        public static IEnumerable<IPublishedContent> Descendants(this IPublishedContent content, int level, string culture = null)
            => content.Descendants(VariationContextAccessor, level, culture);

        public static IEnumerable<IPublishedContent> DescendantsOfType(this IPublishedContent content,
             string contentTypeAlias, string culture = null)
            => content.DescendantsOfType(VariationContextAccessor, contentTypeAlias, culture);

        public static IEnumerable<T> Descendants<T>(this IPublishedContent content, string culture = null)
            where T : class, IPublishedContent
            => content.Descendants<T>(VariationContextAccessor, culture);

        public static IEnumerable<T> Descendants<T>(this IPublishedContent content, int level, string culture = null)
            where T : class, IPublishedContent
            => content.Descendants<T>(VariationContextAccessor, level, culture);

        public static IEnumerable<IPublishedContent> DescendantsOrSelf(this IPublishedContent content,  string culture = null)
            => content.DescendantsOrSelf(VariationContextAccessor, culture);


        public static IEnumerable<IPublishedContent> DescendantsOrSelf(this IPublishedContent content, int level, string culture = null)
            => content.DescendantsOrSelf(VariationContextAccessor, level, culture);

        public static IEnumerable<IPublishedContent> DescendantsOrSelfOfType(this IPublishedContent content, string contentTypeAlias, string culture = null)
            => content.DescendantsOrSelfOfType(VariationContextAccessor, contentTypeAlias, culture);

        public static IEnumerable<T> DescendantsOrSelf<T>(this IPublishedContent content, string culture = null)
            where T : class, IPublishedContent
            => content.DescendantsOrSelf<T>(VariationContextAccessor, culture);

        public static IEnumerable<T> DescendantsOrSelf<T>(this IPublishedContent content, int level, string culture = null)
            where T : class, IPublishedContent
            => content.DescendantsOrSelf<T>(VariationContextAccessor, level, culture);

        public static IPublishedContent Descendant(this IPublishedContent content, string culture = null)
            => content.Descendant(VariationContextAccessor, culture);

        public static IPublishedContent Descendant(this IPublishedContent content, int level, string culture = null)
            => content.Descendant(VariationContextAccessor, level, culture);


        public static IPublishedContent DescendantOfType(this IPublishedContent content, string contentTypeAlias, string culture = null)
            => content.DescendantOfType(VariationContextAccessor, contentTypeAlias, culture);

        public static T Descendant<T>(this IPublishedContent content, string culture = null)
            where T : class, IPublishedContent
            => content.Descendant<T>(VariationContextAccessor, culture);


        public static T Descendant<T>(this IPublishedContent content, int level, string culture = null)
            where T : class, IPublishedContent
            => content.Descendant<T>(VariationContextAccessor, level, culture);

        public static IPublishedContent DescendantOrSelf(this IPublishedContent content, string culture = null)
            => content.DescendantOrSelf(VariationContextAccessor, culture);

        public static IPublishedContent DescendantOrSelf(this IPublishedContent content, int level, string culture = null)
            => content.DescendantOrSelf(VariationContextAccessor, level, culture);

        public static IPublishedContent DescendantOrSelfOfType(this IPublishedContent content, string contentTypeAlias, string culture = null)
            => content.DescendantOrSelfOfType(VariationContextAccessor, contentTypeAlias, culture);

        public static T DescendantOrSelf<T>(this IPublishedContent content, string culture = null)
            where T : class, IPublishedContent
            => content.DescendantOrSelf<T>(VariationContextAccessor, culture);

        public static T DescendantOrSelf<T>(this IPublishedContent content, int level, string culture = null)
            where T : class, IPublishedContent
            => content.DescendantOrSelf<T>(VariationContextAccessor, level, culture);


        /// <summary>
        /// Gets the children of the content item.
        /// </summary>
        /// <param name="content">The content item.</param>
        /// <param name="culture">
        /// The specific culture to get the URL children for. Default is null which will use the current culture in <see cref="VariationContext"/>
        /// </param>
        /// <remarks>
        /// <para>Gets children that are available for the specified culture.</para>
        /// <para>Children are sorted by their sortOrder.</para>
        /// <para>
        /// For culture,
        /// if null is used the current culture is used.
        /// If an empty string is used only invariant children are returned.
        /// If "*" is used all children are returned.
        /// </para>
        /// <para>
        /// If a variant culture is specified or there is a current culture in the <see cref="VariationContext"/> then the Children returned
        /// will include both the variant children matching the culture AND the invariant children because the invariant children flow with the current culture.
        /// However, if an empty string is specified only invariant children are returned.
        /// </para>
        /// </remarks>
        public static IEnumerable<IPublishedContent> Children(this IPublishedContent content, string culture = null)
            => content.Children(VariationContextAccessor, culture);

        /// <summary>
        /// Gets the children of the content, filtered by a predicate.
        /// </summary>
        /// <param name="content">The content.</param>
        /// <param name="predicate">The predicate.</param>
        /// <param name="culture">The specific culture to filter for. If null is used the current culture is used. (Default is null)</param>
        /// <returns>The children of the content, filtered by the predicate.</returns>
        /// <remarks>
        /// <para>Children are sorted by their sortOrder.</para>
        /// </remarks>
        public static IEnumerable<IPublishedContent> Children(this IPublishedContent content, Func<IPublishedContent, bool> predicate, string culture = null)
            => content.Children(VariationContextAccessor, predicate, culture);

        /// <summary>
        /// Gets the children of the content, of any of the specified types.
        /// </summary>
        /// <param name="content">The content.</param>
        /// <param name="culture">The specific culture to filter for. If null is used the current culture is used. (Default is null)</param>
        /// <param name="contentTypeAlias">The content type alias.</param>
        /// <returns>The children of the content, of any of the specified types.</returns>
        public static IEnumerable<IPublishedContent> ChildrenOfType(this IPublishedContent content, string contentTypeAlias, string culture = null)
            => content.ChildrenOfType(VariationContextAccessor, contentTypeAlias, culture);

        /// <summary>
        /// Gets the children of the content, of a given content type.
        /// </summary>
        /// <typeparam name="T">The content type.</typeparam>
        /// <param name="content">The content.</param>
        /// <param name="culture">The specific culture to filter for. If null is used the current culture is used. (Default is null)</param>
        /// <returns>The children of content, of the given content type.</returns>
        /// <remarks>
        /// <para>Children are sorted by their sortOrder.</para>
        /// </remarks>
        public static IEnumerable<T> Children<T>(this IPublishedContent content, string culture = null)
            where T : class, IPublishedContent
            => content.Children<T>(VariationContextAccessor, culture);

        public static IPublishedContent FirstChild(this IPublishedContent content, string culture = null)
            => content.FirstChild(VariationContextAccessor, culture);

        /// <summary>
        /// Gets the first child of the content, of a given content type.
        /// </summary>
        public static IPublishedContent FirstChildOfType(this IPublishedContent content, string contentTypeAlias, string culture = null)
            => content.FirstChildOfType(VariationContextAccessor, contentTypeAlias, culture);

        public static IPublishedContent FirstChild(this IPublishedContent content, Func<IPublishedContent, bool> predicate, string culture = null)
            => content.FirstChild(VariationContextAccessor, predicate, culture);

        public static IPublishedContent FirstChild(this IPublishedContent content, Guid uniqueId, string culture = null)
            => content.FirstChild(VariationContextAccessor, uniqueId, culture);


        public static T FirstChild<T>(this IPublishedContent content, string culture = null)
            where T : class, IPublishedContent
            => content.FirstChild<T>(VariationContextAccessor, culture);

        public static T FirstChild<T>(this IPublishedContent content, Func<T, bool> predicate, string culture = null)
            where T : class, IPublishedContent
            => content.FirstChild<T>(VariationContextAccessor, predicate, culture);

        /// <summary>
        /// Gets the siblings of the content.
        /// </summary>
        /// <param name="content">The content.</param>
        /// <param name="culture">The specific culture to filter for. If null is used the current culture is used. (Default is null)</param>
        /// <returns>The siblings of the content.</returns>
        /// <remarks>
        ///   <para>Note that in V7 this method also return the content node self.</para>
        /// </remarks>
        public static IEnumerable<IPublishedContent> Siblings(this IPublishedContent content, string culture = null)
            => content.Siblings(PublishedSnapshot, VariationContextAccessor, culture);

        /// <summary>
        /// Gets the siblings of the content, of a given content type.
        /// </summary>
        /// <param name="content">The content.</param>
        /// <param name="contentTypeAlias">The content type alias.</param>
        /// <param name="culture">The specific culture to filter for. If null is used the current culture is used. (Default is null)</param>
        /// <returns>The siblings of the content, of the given content type.</returns>
        /// <remarks>
        ///   <para>Note that in V7 this method also return the content node self.</para>
        /// </remarks>
        public static IEnumerable<IPublishedContent> SiblingsOfType(this IPublishedContent content, string contentTypeAlias, string culture = null)
            => content.SiblingsOfType(PublishedSnapshot, VariationContextAccessor, contentTypeAlias, culture);

        /// <summary>
        /// Gets the siblings of the content, of a given content type.
        /// </summary>
        /// <typeparam name="T">The content type.</typeparam>
        /// <param name="content">The content.</param>
        /// <param name="culture">The specific culture to filter for. If null is used the current culture is used. (Default is null)</param>
        /// <returns>The siblings of the content, of the given content type.</returns>
        /// <remarks>
        ///   <para>Note that in V7 this method also return the content node self.</para>
        /// </remarks>
        public static IEnumerable<T> Siblings<T>(this IPublishedContent content, string culture = null)
            where T : class, IPublishedContent
            => content.Siblings<T>(PublishedSnapshot, VariationContextAccessor, culture);

        /// <summary>
        /// Gets the siblings of the content including the node itself to indicate the position.
        /// </summary>
        /// <param name="content">The content.</param>
        /// <param name="culture">The specific culture to filter for. If null is used the current culture is used. (Default is null)</param>
        /// <returns>The siblings of the content including the node itself.</returns>
        public static IEnumerable<IPublishedContent> SiblingsAndSelf(this IPublishedContent content, string culture = null)
            => content.SiblingsAndSelf(PublishedSnapshot, VariationContextAccessor, culture);

        /// <summary>
        /// Gets the siblings of the content including the node itself to indicate the position, of a given content type.
        /// </summary>
        /// <param name="content">The content.</param>
        /// <param name="culture">The specific culture to filter for. If null is used the current culture is used. (Default is null)</param>
        /// <param name="contentTypeAlias">The content type alias.</param>
        /// <returns>The siblings of the content including the node itself, of the given content type.</returns>
        public static IEnumerable<IPublishedContent> SiblingsAndSelfOfType(this IPublishedContent content, string contentTypeAlias, string culture = null)
            => content.SiblingsAndSelfOfType(PublishedSnapshot, VariationContextAccessor, contentTypeAlias, culture);

        /// <summary>
        /// Gets the siblings of the content including the node itself to indicate the position, of a given content type.
        /// </summary>
        /// <typeparam name="T">The content type.</typeparam>
        /// <param name="content">The content.</param>
        /// <param name="culture">The specific culture to filter for. If null is used the current culture is used. (Default is null)</param>
        /// <returns>The siblings of the content including the node itself, of the given content type.</returns>
        public static IEnumerable<T> SiblingsAndSelf<T>(this IPublishedContent content, string culture = null)
            where T : class, IPublishedContent
            => content.SiblingsAndSelf<T>(PublishedSnapshot, VariationContextAccessor, culture);


        /// <summary>
        /// Gets the url of the content item.
        /// </summary>
        /// <remarks>
        /// <para>If the content item is a document, then this method returns the url of the
        /// document. If it is a media, then this methods return the media url for the
        /// 'umbracoFile' property. Use the MediaUrl() method to get the media url for other
        /// properties.</para>
        /// <para>The value of this property is contextual. It depends on the 'current' request uri,
        /// if any. In addition, when the content type is multi-lingual, this is the url for the
        /// specified culture. Otherwise, it is the invariant url.</para>
        /// </remarks>
        public static string Url(this IPublishedContent content, string culture = null, UrlMode mode = UrlMode.Default)
            => content.Url(PublishedUrlProvider, culture, mode);

         /// <summary>
        /// Gets the children of the content in a DataTable.
        /// </summary>
        /// <param name="content">The content.</param>
        /// <param name="variationContextAccessor">Variation context accessor.</param>
        /// <param name="contentTypeService">The content type service.</param>
        /// <param name="mediaTypeService">The media type service.</param>
        /// <param name="memberTypeService">The member type service.</param>
        /// <param name="publishedUrlProvider">The published url provider.</param>
        /// <param name="contentTypeAliasFilter">An optional content type alias.</param>
        /// <param name="culture">The specific culture to filter for. If null is used the current culture is used. (Default is null)</param>
        /// <returns>The children of the content.</returns>
        public static DataTable ChildrenAsTable(this IPublishedContent content, string contentTypeAliasFilter = "", string culture = null)
         => content.ChildrenAsTable(VariationContextAccessor, ContentTypeService, MediaTypeService, MemberTypeService, PublishedUrlProvider, contentTypeAliasFilter, culture);

        /// <summary>
        /// Gets the url for a media.
        /// </summary>
        /// <param name="content">The content item.</param>
        /// <param name="culture">The culture (use current culture by default).</param>
        /// <param name="mode">The url mode (use site configuration by default).</param>
        /// <param name="propertyAlias">The alias of the property (use 'umbracoFile' by default).</param>
        /// <returns>The url for the media.</returns>
        /// <remarks>
        /// <para>The value of this property is contextual. It depends on the 'current' request uri,
        /// if any. In addition, when the content type is multi-lingual, this is the url for the
        /// specified culture. Otherwise, it is the invariant url.</para>
        /// </remarks>
        public static string MediaUrl(
            this IPublishedContent content,
            string culture = null,
            UrlMode mode = UrlMode.Default,
            string propertyAlias = Constants.Conventions.Media.File)
            => content.MediaUrl(PublishedUrlProvider, culture, mode, propertyAlias);

        /// <summary>
        /// Gets the name of the content item creator.
        /// </summary>
        /// <param name="content">The content item.</param>
        public static string CreatorName(this IPublishedContent content) =>
            content.CreatorName(UserService);

        /// <summary>
        /// Gets the name of the content item writer.
        /// </summary>
        /// <param name="content">The content item.</param>
        public static string WriterName(this IPublishedContent content) =>
            content.WriterName(UserService);

        /// <summary>
        /// Gets the culture assigned to a document by domains, in the context of a current Uri.
        /// </summary>
        /// <param name="content">The document.</param>
        /// <param name="current">An optional current Uri.</param>
        /// <returns>The culture assigned to the document by domains.</returns>
        /// <remarks>
        /// <para>In 1:1 multilingual setup, a document contains several cultures (there is not
        /// one document per culture), and domains, withing the context of a current Uri, assign
        /// a culture to that document.</para>
        /// </remarks>
        public static string GetCultureFromDomains(
            this IPublishedContent content,
            Uri current = null)
            => content.GetCultureFromDomains(UmbracoContextAccessor, SiteDomainHelper, current);


        public static IEnumerable<PublishedSearchResult> SearchDescendants(
            this IPublishedContent content,
            string term,
            string indexName = null)
            => content.SearchDescendants(ExamineManager, UmbracoContextAccessor, term, indexName);


        public static IEnumerable<PublishedSearchResult> SearchChildren(
            this IPublishedContent content,
            string term,
            string indexName = null)
            => content.SearchChildren(ExamineManager, UmbracoContextAccessor, term, indexName);


    }
}