using System.Text.Json;
using System.Text.Json.Serialization;

namespace Bokhantarare;

public class Book
{
    [JsonPropertyName("ISBN")]
    public string ISBN { get; set; }
    [JsonPropertyName("title")]
    public string Title { get; set; }
    [JsonPropertyName("authors")]
    public string[] Authors { get; set; }
    [JsonPropertyName("publicationYear")]
    public string PubYear { get; set; }
    
    public Book()
    {
        
    }

    public Book(string ISBN, string title, string[] authors, string pubYear)
    {
        this.ISBN = ISBN;
        this.Title = title;
        this.Authors = authors;
        this.PubYear = pubYear;
    }

    public Book(string ISBN, string title, string author, string pubYear) : this(ISBN, title, [author], pubYear)
    {
        
    }

    public override string ToString()
    {
        return $"Title: {Title}, Authors: {string.Join(", ", Authors)}, PubDate: {PubYear}";
    }

    public static Book? GetBookFromISBN(string ISBN)
    {
        ISBN = ISBN.Replace("-", "").Trim();
        if (ISBN.Length != 10 && ISBN.Length != 13)
        {
            throw new ArgumentException("Invalid ISBN");
        }
        
        Dictionary<String, Object>? responce = JsonSerializer.Deserialize<Dictionary<String, Object>>(
            Helper.Request($"https://openlibrary.org/api/books?bibkeys=ISBN:{ISBN}&jscmd=details&format=json"));

        if (responce == null)
        {
            return null;
        }
        
        Dictionary<String, Object>? book = JsonSerializer.Deserialize<Dictionary<String, Object>>(responce[$"ISBN:{ISBN}"].ToString());
        Dictionary<String, Object>? details = JsonSerializer.Deserialize<Dictionary<String, Object>>(book["details"].ToString());
        
        string title = "";
        if (details.ContainsKey("full_title"))
        {
            title = details["full_title"].ToString();
        }
        else if (details.ContainsKey("title"))
        {
            title = details["title"].ToString();
        }
        else
        {
            title = "Missing title";
        }
        List<string> authors = new List<string>();
        if (details.ContainsKey("authors"))
        {
            foreach (Dictionary<string, object> listAuthors in JsonSerializer.Deserialize<Dictionary<String, Object>[]>(
                         details["authors"].ToString()))
            {
                authors.Add(listAuthors["name"].ToString());
            }
        }
        else
        {
            authors.Add("Missing Authors");
        }

        string pubDate = "";
        if (details.ContainsKey("publish_date"))
        {
            details["publish_date"].ToString();
        }
        else
        {
            pubDate = "No Publication Date";
        }
        return new Book(ISBN, title, authors.ToArray(), pubDate);
    }

    public static BareBookInfo[]? GetBooksFromTitle(string title)
    {
        title = title.Trim();

        Dictionary<String, Object>? responce = JsonSerializer.Deserialize<Dictionary<String, Object>>(
            Helper.Request($"https://openlibrary.org/search.json?q={title}"));

        if (responce == null)
        {
            return null;
        }
        
        List<Dictionary<String, Object>>? books = JsonSerializer.Deserialize<List<Dictionary<String, Object>>>(responce["docs"].ToString());

        List<BareBookInfo> bookInfos = new List<BareBookInfo>();
        
        foreach (Dictionary<String, Object> book in books)
        {
            if (book.TryGetValue("cover_edition_key", out var edition) && book.TryGetValue("title", out var value))
            {
                bookInfos.Add(new BareBookInfo(edition.ToString(), value.ToString()));
            }
            else
            {
                // This is a debug line to list search results that where missing the cover_edition_key
                //Console.WriteLine(JsonSerializer.Serialize(book));
            }
        }

        return bookInfos.ToArray();
    }
}