package main

import (
	"bytes"
	pathpkg "path"
	"strings"
)

// Format represents an output format.
type Format interface {
	Format(*Page, *Config) (path string, content []byte)
}

type FormatFunc func(*Page, *Config) (string, []byte)

func (f FormatFunc) Format(p *Page, cfg *Config) (string, []byte) {
	return f(p, cfg)
}

// FormatGemini formats the page as Gemini text.
func FormatGemini(p *Page, cfg *Config) (path string, content []byte) {
	path = pathpkg.Join(p.Path, "index.gmi")
	content = []byte(p.Content)
	return
}

// FormatHTML formats the page as HTML.
func FormatHTML(p *Page, cfg *Config) (path string, content []byte) {
	path = pathpkg.Join(p.Path, "index.html")

	r := strings.NewReader(p.Content)
	content = textToHTML(r)

	// html template context
	type htmlCtx struct {
		Title   string // page title
		Content string // page HTML contents
	}

	var b bytes.Buffer
	// clean path to remove trailing slash
	dir := pathpkg.Dir(pathpkg.Clean(p.Path))
	tmpl := cfg.Templates.FindTemplate(dir, "output.html")
	tmpl.Execute(&b, &htmlCtx{
		Title:   p.Title,
		Content: string(content),
	})
	content = b.Bytes()
	return
}