// Package paprika implements the Paprika manga base.
// HTML scraping; standard list/detail/chapter/page structure with Bootstrap media cards.
package paprika

import (
	"context"
	"fmt"
	"net/http"
	"strings"

	"github.com/PuerkitoBio/goquery"

	"goyomi/internal/httpclient"
	"goyomi/internal/source"
	"goyomi/sources/base/util"
)

type Config struct {
	Name    string
	BaseURL string
	Lang    string
}

type Source struct {
	cfg    Config
	client *httpclient.Client
	id     int64
}

func New(cfg Config) *Source {
	c := httpclient.NewClient(httpclient.WithRateLimit(1, 2))
	return &Source{cfg: cfg, client: c, id: source.GenerateSourceID(cfg.Name, cfg.Lang)}
}

func (s *Source) ID() int64            { return s.id }
func (s *Source) Name() string         { return s.cfg.Name }
func (s *Source) Lang() string         { return s.cfg.Lang }
func (s *Source) SupportsLatest() bool { return true }

func (s *Source) base() string { return strings.TrimRight(s.cfg.BaseURL, "/") }

func (s *Source) get(ctx context.Context, rawURL string) (*goquery.Document, error) {
	req, err := http.NewRequestWithContext(ctx, http.MethodGet, rawURL, nil)
	if err != nil {
		return nil, err
	}
	req.Header.Set("Referer", s.cfg.BaseURL+"/")
	resp, err := s.client.Do(req)
	if err != nil {
		return nil, err
	}
	defer resp.Body.Close()
	if resp.StatusCode != http.StatusOK {
		return nil, fmt.Errorf("paprika: HTTP %d", resp.StatusCode)
	}
	return goquery.NewDocumentFromReader(resp.Body)
}

func (s *Source) parseMangaList(doc *goquery.Document) source.MangasPage {
	var mangas []source.SManga
	doc.Find("div.media").Each(func(_ int, el *goquery.Selection) {
		a := el.Find("h4 a, h3 a, .media-heading a").First()
		if a.Length() == 0 {
			a = el.Find("a").First()
		}
		if a.Length() == 0 {
			return
		}
		m := source.SManga{
			URL:   a.AttrOr("href", ""),
			Title: strings.TrimSpace(a.Text()),
		}
		if img := el.Find("img").First(); img.Length() > 0 {
			m.ThumbnailURL = util.AbsURL(s.cfg.BaseURL, img.AttrOr("src", img.AttrOr("data-src", "")))
		}
		if m.URL != "" && m.Title != "" {
			mangas = append(mangas, m)
		}
	})
	hasNext := doc.Find(".pagination .next, li.next a, a[rel=next]").Length() > 0
	return source.MangasPage{Mangas: mangas, HasNextPage: hasNext}
}

func (s *Source) GetPopularManga(page int) (source.MangasPage, error) {
	doc, err := s.get(context.Background(), fmt.Sprintf("%s/popular-manga?page=%d", s.base(), page))
	if err != nil {
		return source.MangasPage{}, err
	}
	return s.parseMangaList(doc), nil
}

func (s *Source) GetLatestUpdates(page int) (source.MangasPage, error) {
	doc, err := s.get(context.Background(), fmt.Sprintf("%s/latest-manga?page=%d", s.base(), page))
	if err != nil {
		return source.MangasPage{}, err
	}
	return s.parseMangaList(doc), nil
}

func (s *Source) GetSearchManga(page int, query string, filters []source.Filter) (source.MangasPage, error) {
	doc, err := s.get(context.Background(), fmt.Sprintf("%s/search?q=%s&page=%d", s.base(), query, page))
	if err != nil {
		return source.MangasPage{}, err
	}
	return s.parseMangaList(doc), nil
}

func (s *Source) GetMangaDetails(manga source.SManga) (source.SManga, error) {
	doc, err := s.get(context.Background(), util.AbsURL(s.cfg.BaseURL, manga.URL))
	if err != nil {
		return manga, err
	}
	result := source.SManga{URL: manga.URL}
	result.Title = strings.TrimSpace(doc.Find("div.manga-detail h1").First().Text())
	if result.Title == "" {
		result.Title = manga.Title
	}
	if img := doc.Find("div.manga-detail img").First(); img.Length() > 0 {
		result.ThumbnailURL = util.AbsURL(s.cfg.BaseURL, img.AttrOr("src", ""))
	}

	// Parse metadata paragraphs: "Label: value" lines inside div.media-body p
	doc.Find("div.manga-detail div.media-body p, div.manga-detail .info p").Each(func(_ int, el *goquery.Selection) {
		text := strings.TrimSpace(el.Text())
		if strings.HasPrefix(strings.ToLower(text), "author") {
			result.Author = strings.TrimSpace(strings.SplitN(text, ":", 2)[len(strings.SplitN(text, ":", 2))-1])
		} else if strings.HasPrefix(strings.ToLower(text), "artist") {
			result.Artist = strings.TrimSpace(strings.SplitN(text, ":", 2)[len(strings.SplitN(text, ":", 2))-1])
		} else if strings.HasPrefix(strings.ToLower(text), "genre") || strings.HasPrefix(strings.ToLower(text), "categ") {
			result.Genre = strings.TrimSpace(strings.SplitN(text, ":", 2)[len(strings.SplitN(text, ":", 2))-1])
		} else if strings.HasPrefix(strings.ToLower(text), "status") {
			result.Status = util.StatusFromString(strings.TrimSpace(strings.SplitN(text, ":", 2)[len(strings.SplitN(text, ":", 2))-1]))
		}
	})

	result.Description = strings.TrimSpace(doc.Find("div.manga-detail .description, div.manga-detail .synopsis").First().Text())
	return result, nil
}

func (s *Source) GetChapterList(manga source.SManga) ([]source.SChapter, error) {
	doc, err := s.get(context.Background(), util.AbsURL(s.cfg.BaseURL, manga.URL))
	if err != nil {
		return nil, err
	}
	var chapters []source.SChapter
	mangaTitle := strings.TrimSpace(doc.Find("div.manga-detail h1").First().Text())
	doc.Find("div.total-chapter:has(h2) li").Each(func(_ int, el *goquery.Selection) {
		a := el.Find("a").First()
		href := a.AttrOr("href", "")
		if href == "" {
			return
		}
		name := strings.TrimSpace(a.Text())
		// Strip manga title prefix if present
		name = strings.TrimPrefix(name, mangaTitle)
		name = strings.TrimSpace(name)
		if name == "" {
			name = strings.TrimSpace(a.Text())
		}
		var ts int64
		if span := el.Find("span.date, small").First(); span.Length() > 0 {
			ts = util.ParseRelativeDate(strings.TrimSpace(span.Text()))
		}
		chapters = append(chapters, source.SChapter{
			URL:        href,
			Name:       name,
			DateUpload: ts,
		})
	})
	return chapters, nil
}

func (s *Source) GetPageList(chapter source.SChapter) ([]source.Page, error) {
	doc, err := s.get(context.Background(), util.AbsURL(s.cfg.BaseURL, chapter.URL))
	if err != nil {
		return nil, err
	}
	// Pages stored in hidden #arraydata element as comma-separated URLs
	raw := strings.TrimSpace(doc.Find("#arraydata").Text())
	if raw == "" {
		// Fallback: direct images
		var pages []source.Page
		doc.Find("div.reading-content img, div.reader-area img").Each(func(i int, img *goquery.Selection) {
			u := img.AttrOr("src", img.AttrOr("data-src", ""))
			if u != "" {
				pages = append(pages, source.Page{Index: i, ImageURL: util.AbsURL(s.cfg.BaseURL, u)})
			}
		})
		return pages, nil
	}

	var pages []source.Page
	for i, u := range strings.Split(raw, ",") {
		u = strings.TrimSpace(u)
		if u != "" {
			pages = append(pages, source.Page{Index: i, ImageURL: u})
		}
	}
	return pages, nil
}

func (s *Source) GetImageURL(page source.Page) (string, error) { return page.ImageURL, nil }
func (s *Source) GetFilterList() []source.Filter               { return nil }