using FictionArchive.Common.Enums;
using FictionArchive.Service.NovelService.Models.DTOs;
using FictionArchive.Service.NovelService.Services;
using HotChocolate.Authorization;
using HotChocolate.Data;
using HotChocolate.Types;

namespace FictionArchive.Service.NovelService.GraphQL;

public class Query
{
    [Authorize]
    [UsePaging]
    [UseProjection]
    [UseFiltering]
    [UseSorting]
    public IQueryable<NovelDto> GetNovels(
        NovelServiceDbContext dbContext,
        Language preferredLanguage = Language.En)
    {
        return dbContext.Novels.Select(novel => new NovelDto
        {
            Id = novel.Id,
            CreatedTime = novel.CreatedTime,
            LastUpdatedTime = novel.LastUpdatedTime,
            Url = novel.Url,
            RawLanguage = novel.RawLanguage,
            RawStatus = novel.RawStatus,
            StatusOverride = novel.StatusOverride,
            ExternalId = novel.ExternalId,

            Name = novel.Name.Texts
                .Where(t => t.Language == preferredLanguage)
                .Select(t => t.Text)
                .FirstOrDefault()
                ?? novel.Name.Texts.Select(t => t.Text).FirstOrDefault()
                ?? "",

            Description = novel.Description.Texts
                .Where(t => t.Language == preferredLanguage)
                .Select(t => t.Text)
                .FirstOrDefault()
                ?? novel.Description.Texts.Select(t => t.Text).FirstOrDefault()
                ?? "",

            Author = new PersonDto
            {
                Id = novel.Author.Id,
                CreatedTime = novel.Author.CreatedTime,
                LastUpdatedTime = novel.Author.LastUpdatedTime,
                Name = novel.Author.Name.Texts
                    .Where(t => t.Language == preferredLanguage)
                    .Select(t => t.Text)
                    .FirstOrDefault()
                    ?? novel.Author.Name.Texts.Select(t => t.Text).FirstOrDefault()
                    ?? "",
                ExternalUrl = novel.Author.ExternalUrl
            },

            Source = new SourceDto
            {
                Id = novel.Source.Id,
                CreatedTime = novel.Source.CreatedTime,
                LastUpdatedTime = novel.Source.LastUpdatedTime,
                Name = novel.Source.Name,
                Key = novel.Source.Key,
                Url = novel.Source.Url
            },

            CoverImage = novel.CoverImage != null
                ? new ImageDto
                {
                    Id = novel.CoverImage.Id,
                    CreatedTime = novel.CoverImage.CreatedTime,
                    LastUpdatedTime = novel.CoverImage.LastUpdatedTime,
                    NewPath = novel.CoverImage.NewPath
                }
                : null,

            Chapters = novel.Chapters.Select(chapter => new ChapterDto
            {
                Id = chapter.Id,
                CreatedTime = chapter.CreatedTime,
                LastUpdatedTime = chapter.LastUpdatedTime,
                Revision = chapter.Revision,
                Order = chapter.Order,
                Url = chapter.Url,
                Name = chapter.Name.Texts
                    .Where(t => t.Language == preferredLanguage)
                    .Select(t => t.Text)
                    .FirstOrDefault()
                    ?? chapter.Name.Texts.Select(t => t.Text).FirstOrDefault()
                    ?? "",
                Body = chapter.Body.Texts
                    .Where(t => t.Language == preferredLanguage)
                    .Select(t => t.Text)
                    .FirstOrDefault()
                    ?? chapter.Body.Texts.Select(t => t.Text).FirstOrDefault()
                    ?? "",
                Images = chapter.Images.Select(image => new ImageDto
                {
                    Id = image.Id,
                    CreatedTime = image.CreatedTime,
                    LastUpdatedTime = image.LastUpdatedTime,
                    NewPath = image.NewPath
                }).ToList()
            }).ToList(),

            Tags = novel.Tags.Select(tag => new NovelTagDto
            {
                Id = tag.Id,
                CreatedTime = tag.CreatedTime,
                LastUpdatedTime = tag.LastUpdatedTime,
                Key = tag.Key,
                TagType = tag.TagType,
                DisplayName = tag.DisplayName.Texts
                    .Where(t => t.Language == preferredLanguage)
                    .Select(t => t.Text)
                    .FirstOrDefault()
                    ?? tag.DisplayName.Texts.Select(t => t.Text).FirstOrDefault()
                    ?? "",
                Source = tag.Source != null
                    ? new SourceDto
                    {
                        Id = tag.Source.Id,
                        CreatedTime = tag.Source.CreatedTime,
                        LastUpdatedTime = tag.Source.LastUpdatedTime,
                        Name = tag.Source.Name,
                        Key = tag.Source.Key,
                        Url = tag.Source.Url
                    }
                    : null
            }).ToList()
        });
    }

    [Authorize]
    [UseFirstOrDefault]
    [UseProjection]
    public IQueryable<ChapterReaderDto> GetChapter(
        NovelServiceDbContext dbContext,
        uint novelId,
        uint chapterOrder,
        Language preferredLanguage = Language.En)
    {
        return dbContext.Chapters
            .Where(c => c.Novel.Id == novelId && c.Order == chapterOrder)
            .Select(chapter => new ChapterReaderDto
            {
                Id = chapter.Id,
                CreatedTime = chapter.CreatedTime,
                LastUpdatedTime = chapter.LastUpdatedTime,
                Revision = chapter.Revision,
                Order = chapter.Order,
                Url = chapter.Url,

                Name = chapter.Name.Texts
                    .Where(t => t.Language == preferredLanguage)
                    .Select(t => t.Text)
                    .FirstOrDefault()
                    ?? chapter.Name.Texts.Select(t => t.Text).FirstOrDefault()
                    ?? "",

                Body = chapter.Body.Texts
                    .Where(t => t.Language == preferredLanguage)
                    .Select(t => t.Text)
                    .FirstOrDefault()
                    ?? chapter.Body.Texts.Select(t => t.Text).FirstOrDefault()
                    ?? "",

                Images = chapter.Images.Select(image => new ImageDto
                {
                    Id = image.Id,
                    CreatedTime = image.CreatedTime,
                    LastUpdatedTime = image.LastUpdatedTime,
                    NewPath = image.NewPath
                }).ToList(),

                NovelId = chapter.Novel.Id,
                NovelName = chapter.Novel.Name.Texts
                    .Where(t => t.Language == preferredLanguage)
                    .Select(t => t.Text)
                    .FirstOrDefault()
                    ?? chapter.Novel.Name.Texts.Select(t => t.Text).FirstOrDefault()
                    ?? "",
                TotalChapters = chapter.Novel.Chapters.Count,
                PrevChapterOrder = chapter.Novel.Chapters
                    .Where(c => c.Order < chapterOrder)
                    .OrderByDescending(c => c.Order)
                    .Select(c => (uint?)c.Order)
                    .FirstOrDefault(),
                NextChapterOrder = chapter.Novel.Chapters
                    .Where(c => c.Order > chapterOrder)
                    .OrderBy(c => c.Order)
                    .Select(c => (uint?)c.Order)
                    .FirstOrDefault()
            });
    }
}