// namespace HaDocument.Models;
// using System;
// using HaDocument.Interfaces;
// using System.Collections.Immutable;
// using System.Collections.Generic;
// using HaDocument.Models;
// using HaDocument.Comparers;
// using System.Linq;


// public class Library : ILibrary {
//     public IHaDocumentOptions Options { get; }
//     public ImmutableDictionary<string, Tradition> Traditions { get; }
//     public ImmutableDictionary<string, Person> Persons { get; }
//     public ImmutableDictionary<string, Meta> Metas { get; }
//     public ImmutableDictionary<string, Marginal> Marginals { get; }
//     public ImmutableDictionary<string, Location> Locations { get; }
//     public ImmutableDictionary<string, Letter> Letters { get; }
//     public ImmutableDictionary<string, Person> HandPersons { get; }
//     public ImmutableDictionary<string, Editreason> Editreasons { get; }
//     public ImmutableDictionary<string, Comment> Comments { get; }
//     public ImmutableDictionary<string, ImmutableList<Backlink>> Backlinks { get; }
//     public ImmutableDictionary<string, ImmutableList<Hand>> Hands { get; }

//     // Structure for lookups from ZH:
//     public ImmutableDictionary<string, ImmutableDictionary<string, ImmutableDictionary<string, string>>> Structure { get; }

//     // Lookups:
//     // Auswählen von Kommentaren nach (1) Kategorie, (2) Anfangsbuchstaben vom Lemma.
//     // So: _ = CommentsByCategoryLetter['neuzeit']['A']
//     public ImmutableDictionary<string, Lookup<string, Comment>> CommentsByCategoryLetter { get; }
//     public Lookup<string, Comment> CommentsByCategory { get; }
//     // Auswählen von Subkommentaren nach ID
//     public ImmutableDictionary<string, Comment> SubCommentsByID { get; }
//     // Auswählen von Marginalien nach Briefen
//     public Lookup<string, Marginal> MarginalsByLetter { get; }
//     // Ausw?hlen von Edits nach Briefen
//     public Lookup<string, Editreason> EditreasonsByLetter { get; }
//     // Auswählen von Briefen nach autoptischer Numemr und in zeitlich sortierter Reihenfolge.
//     public ImmutableSortedSet<Meta> MetasByDate { get; }
//     // Auswählen von Briefen nach dem Jahr, sortiert nach Datum
//     public ILookup<string, Meta> MetasByYear { get; }


//     public Library(
//         Dictionary<string, Tradition> traditions,
//         Dictionary<string, Person> persons,
//         Dictionary<string, Meta> meta,
//         Dictionary<string, Marginal> marginals,
//         Dictionary<string, Location> locations,
//         Dictionary<string, Letter> letters,
//         Dictionary<string, Person> handPersons,
//         Dictionary<string, Editreason> editReasons,
//         Dictionary<string, Comment> comments,
//         Dictionary<string, List<Backlink>> backlinks,
//         Dictionary<string, List<Hand>> hands,
//         Dictionary<string, Dictionary<string, Dictionary<string, string>>> Structure,
//         IHaDocumentOptions options
//     ) {
//         // Dictionaries
//         Traditions = ImmutableDictionary.ToImmutableDictionary(traditions);
//         Persons = ImmutableDictionary.ToImmutableDictionary(persons);
//         Metas = ImmutableDictionary.ToImmutableDictionary(meta);
//         Marginals = ImmutableDictionary.ToImmutableDictionary(marginals);
//         Locations = ImmutableDictionary.ToImmutableDictionary(locations);
//         Letters = ImmutableDictionary.ToImmutableDictionary(letters);
//         HandPersons = ImmutableDictionary.ToImmutableDictionary(handPersons);
//         Editreasons = ImmutableDictionary.ToImmutableDictionary(editReasons);
//         Comments = ImmutableDictionary.ToImmutableDictionary(comments);

//         var backbuilder = ImmutableDictionary.CreateBuilder<string, ImmutableList<Backlink>>();
//         foreach (var entry in backlinks)
//             backbuilder.Add(entry.Key, ImmutableList.ToImmutableList(entry.Value));
//         Backlinks = backbuilder.ToImmutableDictionary();

//         var handbuilder = ImmutableDictionary.CreateBuilder<string, ImmutableList<Hand>>();
//         foreach (var entry in hands)
//             handbuilder.Add(entry.Key, ImmutableList.ToImmutableList(entry.Value));
//         Hands = handbuilder.ToImmutableDictionary();

//         // Lookups
//         CommentsByCategory = (Lookup<string, Comment>)Comments.Values.ToLookup(x => x.Type);
//         var CommentsByLetter_builder = ImmutableDictionary.CreateBuilder<string, Lookup<string, Comment>>();
//         foreach (var ts in CommentsByCategory) {
//             CommentsByLetter_builder.Add(ts.Key, (Lookup<string, Comment>)ts.ToLookup(x => x.Index.Substring(0, 1).ToUpper()));
//         }
//         CommentsByCategoryLetter = CommentsByLetter_builder.ToImmutableDictionary();
//         MarginalsByLetter = (Lookup<string, Marginal>)Marginals.Values.ToLookup(x => x.Letter);
//         EditreasonsByLetter = (Lookup<string, Editreason>)Editreasons.Values.ToLookup(x => x.Letter);
//         MetasByDate = Metas.Values.ToImmutableSortedSet<Meta>(new DefaultComparer());
//         MetasByYear = Metas.Values.ToLookup(x => x.Sort.Year.ToString());

//         var tempbuilder = ImmutableDictionary.CreateBuilder<string, Comment>();
//         foreach (var comm in Comments)
//             if (comm.Value.SubComments != null)
//                 foreach (var subcomm in comm.Value.SubComments)
//                     if (!tempbuilder.ContainsKey(subcomm.Key))
//                         tempbuilder.Add(subcomm.Key, subcomm.Value);
//         SubCommentsByID = tempbuilder.ToImmutableDictionary();

//         var tempstructurebuilder = ImmutableDictionary.CreateBuilder<string, ImmutableDictionary<string, ImmutableDictionary<string, string>>>();
//         foreach (var volume in Structure) {
//             if (volume.Value != null) {
//                 var tempvolbuilder = ImmutableDictionary.CreateBuilder<string, ImmutableDictionary<string, string>>();
//                 foreach (var page in volume.Value) {
//                     if (page.Value != null) {
//                         tempvolbuilder.Add(page.Key, page.Value.ToImmutableDictionary());
//                     }
//                 }
//                 if (tempvolbuilder.Any()) {
//                     tempstructurebuilder.Add(volume.Key, tempvolbuilder.ToImmutableDictionary());
//                 }
//             }
//         }

//         this.Structure = tempstructurebuilder.ToImmutableDictionary();

//         Options = options;

//     }

//     // public List<Meta> MetasByDate() {
//     //     var ret = Metas.OrderBy(x => x.Value, new DefaultComparer()).ToLookup(x => x.Value.Autopsic, x => x.Value);
//     //     ret.Sort(new DefaultComparer());
//     //     return ret;
//     // }

//     public ImmutableList<Meta> MetasByZH() {
//         return Metas.Values.ToImmutableList().Sort(new Comparers.ZHComparer());
//     }

//     public List<Person> PersonByAlphabet() {
//         var ret = Persons.Values.ToList();
//         ret.Sort(new Comparers.PersonComparer());
//         return ret;
//     }


// }
// }