package library

import (
	"html/template"
	"strings"

	"github.com/niklasfasching/go-org/org"
)

// parseOrg splits "#+KEY: value" lines out as lower-cased keywords and
// renders the rest of the document to HTML.
func parseOrg(src []byte, path string) (map[string]string, template.HTML, error) {
	kw := map[string]string{}
	var body []string
	for _, line := range strings.Split(string(src), "\n") {
		t := strings.TrimSpace(line)
		if rest, ok := strings.CutPrefix(t, "#+"); ok {
			if k, v, ok := strings.Cut(rest, ":"); ok && k != "" && !strings.ContainsAny(k, " \t") {
				kw[strings.ToLower(k)] = strings.TrimSpace(v)
				continue
			}
		}
		body = append(body, line)
	}
	text := strings.TrimSpace(strings.Join(body, "\n"))
	if text == "" {
		return kw, "", nil
	}
	out, err := org.New().Parse(strings.NewReader(text), path).Write(org.NewHTMLWriter())
	if err != nil {
		return nil, "", err
	}
	return kw, template.HTML(out), nil
}