package about

import (
	"io"
	"net/http"
	"os"

	"github.com/gomarkdown/markdown"
	"github.com/gomarkdown/markdown/html"
	"github.com/gomarkdown/markdown/parser"

	"git.gabrielgio.me/cerrado/templates"
)

type (
	AboutHandler struct {
		readmePath string
	}

	configurationRepository interface {
		GetRootReadme() string
	}
)

func NewAboutHandler(configRepo configurationRepository) *AboutHandler {
	return &AboutHandler{configRepo.GetRootReadme()}
}

func (g *AboutHandler) About(w http.ResponseWriter, r *http.Request) error {
	f, err := os.Open(g.readmePath)
	if err != nil {
		return err
	}

	bs, err := io.ReadAll(f)
	if err != nil {
		return err
	}

	extensions := parser.CommonExtensions | parser.AutoHeadingIDs | parser.NoEmptyLineBeforeBlock
	p := parser.NewWithExtensions(extensions)
	doc := p.Parse(bs)

	htmlFlags := html.CommonFlags | html.HrefTargetBlank
	opts := html.RendererOptions{Flags: htmlFlags}
	renderer := html.NewRenderer(opts)

	bs = markdown.Render(doc, renderer)

	gitList := &templates.AboutPage{
		Body: bs,
	}
	templates.WritePageTemplate(w, gitList, r.Context())
	return nil
}