package mdconv_test

import (
	"bytes"
	"testing"
	"text/template"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"

	"tildegit.org/tjp/gus/gemtext"
	"tildegit.org/tjp/gus/gemtext/mdconv"
)

var gmiDoc = `
# top-level header line

## subtitle

This is some non-blank regular text.

* an
* unordered
* list

=> gemini://google.com/ as if
=> https://google.com/

> this is a quote
> -tjp

`[1:] + "```pre-formatted code\ndoc := gemtext.Parse(req.Body)\n```ignored closing alt-text\n"

func TestConvert(t *testing.T) {
	mdDoc := `
# top-level header line

## subtitle

This is some non-blank regular text.

* an
* unordered
* list

=> [as if](gemini://google.com/)

=> [https://google.com/](https://google.com/)

>  this is a quote

>  -tjp

` + "```\ndoc := gemtext.Parse(req.Body)\n```\n"

	doc, err := gemtext.Parse(bytes.NewBufferString(gmiDoc))
	require.Nil(t, err)

	buf := &bytes.Buffer{}
	require.Nil(t, mdconv.Convert(buf, doc, nil))

	assert.Equal(t, mdDoc, buf.String())
}

func TestConvertWithOverrides(t *testing.T) {
	mdDoc := `
# h1: top-level header line
text: 
## h2: subtitle
text: 
text: This is some non-blank regular text.
text: 
* li: an
* li: unordered
* li: list
text: 
=> link: [as if](gemini://google.com/)
=> link: [https://google.com/](https://google.com/)
text: 
> quote:  this is a quote
> quote:  -tjp
text: 
`[1:] + "```\npf: doc := gemtext.Parse(req.Body)\n```\n"

	overrides := template.Must(template.New("overrides").Parse((`
		{{define "textline"}}text: {{.}}{{end}}
		{{define "linkline"}}=> link: [{{if eq .Label ""}}{{.URL}}{{else}}{{.Label}}{{end}}]({{.URL}})` + "\n" + `{{end}}
		{{define "preformattedtextlines"}}` + "```\n" + `{{range . }}pf: {{.}}{{end}}` + "```\n" + `{{end}}
		{{define "heading1line"}}# h1: {{.Body}}` + "\n" + `{{end}}
		{{define "heading2line"}}## h2: {{.Body}}` + "\n" + `{{end}}
		{{define "heading3line"}}### h3: {{.Body}}` + "\n" + `{{end}}
		{{define "listitemlines"}}{{range .}}* li: {{.Body}}` + "\n" + `{{end}}{{end}}
		{{define "quoteline"}}> quote: {{.Body}}` + "\n" + `{{end}}
		`)[1:]))

	doc, err := gemtext.Parse(bytes.NewBufferString(gmiDoc))
	require.Nil(t, err)

	buf := &bytes.Buffer{}
	require.Nil(t, mdconv.Convert(buf, doc, overrides))

	assert.Equal(t, mdDoc, buf.String())
}