package caps

import (
	"context"
	"encoding/json"
	"time"

	abiv1 "git.dev.alexdunmow.com/block/pluginsdk/abi/v1"
	"git.dev.alexdunmow.com/block/pluginsdk/content"
	"github.com/google/uuid"
)

// contentStub implements content.Content over content.* capability calls.
type contentStub struct{ base }

var _ content.Content = (*contentStub)(nil)

func (s *contentStub) GetAuthorProfile(ctx context.Context, id uuid.UUID) (*content.AuthorProfile, error) {
	resp := &abiv1.ContentGetAuthorProfileResponse{}
	if err := s.invoke(ctx, "get_author_profile", &abiv1.ContentGetAuthorProfileRequest{Id: id.String()}, resp); err != nil {
		return nil, err
	}
	a := resp.GetAuthor()
	if a == nil {
		return nil, nil
	}
	return &content.AuthorProfile{
		ID:          parseUUID(a.GetId()),
		Name:        a.GetName(),
		Slug:        a.GetSlug(),
		Bio:         a.GetBio(),
		AvatarURL:   a.GetAvatarUrl(),
		Website:     a.GetWebsite(),
		SocialLinks: a.GetSocialLinks(),
	}, nil
}

func (s *contentStub) GetPage(ctx context.Context, slug string) (*content.PageInfo, error) {
	resp := &abiv1.ContentGetPageResponse{}
	if err := s.invoke(ctx, "get_page", &abiv1.ContentGetPageRequest{Slug: slug}, resp); err != nil {
		return nil, err
	}
	p := resp.GetPage()
	if p == nil {
		return nil, nil
	}
	return &content.PageInfo{ID: parseUUID(p.GetId()), Slug: p.GetSlug(), Title: p.GetTitle()}, nil
}

func (s *contentStub) GetPost(ctx context.Context, slug string) (*content.PostInfo, error) {
	resp := &abiv1.ContentGetPostResponse{}
	if err := s.invoke(ctx, "get_post", &abiv1.ContentGetPostRequest{Slug: slug}, resp); err != nil {
		return nil, err
	}
	p := resp.GetPost()
	if p == nil {
		return nil, nil
	}
	info := postInfoFromProto(p)
	return &info, nil
}

func (s *contentStub) ListPosts(ctx context.Context, params content.ListPostsParams) ([]content.PostInfo, error) {
	req := &abiv1.ContentListPostsRequest{
		Limit:          int32(params.Limit),
		Offset:         int32(params.Offset),
		Category:       params.Category,
		PublishedOnly:  params.PublishedOnly,
		IncludeBody:    params.IncludeBody,
		IncludeExcerpt: params.IncludeExcerpt,
	}
	resp := &abiv1.ContentListPostsResponse{}
	if err := s.invoke(ctx, "list_posts", req, resp); err != nil {
		return nil, err
	}
	out := make([]content.PostInfo, 0, len(resp.GetPosts()))
	for _, p := range resp.GetPosts() {
		out = append(out, postInfoFromProto(p))
	}
	return out, nil
}

// postInfoFromProto decodes an abiv1.PostInfo into the SDK content.PostInfo,
// shared by GetPost and ListPosts.
func postInfoFromProto(p *abiv1.PostInfo) content.PostInfo {
	var publishedAt time.Time
	if ts := p.GetPublishedAt(); ts != nil {
		publishedAt = ts.AsTime()
	}
	return content.PostInfo{
		ID:               parseUUID(p.GetId()),
		Slug:             p.GetSlug(),
		Title:            p.GetTitle(),
		Excerpt:          p.GetExcerpt(),
		Body:             p.GetBody(),
		FeaturedImageURL: p.GetFeaturedImageUrl(),
		AuthorID:         parseUUID(p.GetAuthorId()),
		AuthorName:       p.GetAuthorName(),
		AuthorSlug:       p.GetAuthorSlug(),
		PublishedAt:      publishedAt,
	}
}

// Slugify has no error channel in the interface; a transport failure degrades
// to the empty string (the caller treats an empty slug as "unavailable").
func (s *contentStub) Slugify(text string) string {
	resp := &abiv1.ContentSlugifyResponse{}
	if err := s.invoke(context.Background(), "slugify", &abiv1.ContentSlugifyRequest{Text: text}, resp); err != nil {
		return ""
	}
	return resp.GetSlug()
}

func (s *contentStub) BlockNoteToHTML(ctx context.Context, doc map[string]any) string {
	docJSON, err := json.Marshal(doc)
	if err != nil {
		return ""
	}
	resp := &abiv1.ContentBlockNoteToHtmlResponse{}
	if err := s.invoke(ctx, "block_note_to_html", &abiv1.ContentBlockNoteToHtmlRequest{DocJson: docJSON}, resp); err != nil {
		return ""
	}
	return resp.GetHtml()
}

func (s *contentStub) GenerateExcerpt(html string, maxLen int) string {
	resp := &abiv1.ContentGenerateExcerptResponse{}
	req := &abiv1.ContentGenerateExcerptRequest{Html: html, MaxLen: int32(maxLen)}
	if err := s.invoke(context.Background(), "generate_excerpt", req, resp); err != nil {
		return ""
	}
	return resp.GetExcerpt()
}

func (s *contentStub) StripHTML(str string) string {
	resp := &abiv1.ContentStripHtmlResponse{}
	if err := s.invoke(context.Background(), "strip_html", &abiv1.ContentStripHtmlRequest{Html: str}, resp); err != nil {
		return ""
	}
	return resp.GetText()
}