package export_test

import (
	"os"
	"testing"

	"github.com/carlosframework/docs/internal/export"
)

// TestWriteSamplePDF is a development aid, not a gate: with
// $DOCS_PDF_SAMPLE set to a path, it writes a PDF there so a person
// (or a browser drive) can open it in a real reader. Skipped
// otherwise, so it costs the gate nothing.
//
// It exists because everything else in this package checks the PDF
// with this package's own reader (pdfread_test.go), and a writer and a
// reader that agree with each other can still both be wrong about the
// specification. Opening the output in something nobody here wrote is
// the only check that closes that gap.
func TestWriteSamplePDF(t *testing.T) {
	path := os.Getenv("DOCS_PDF_SAMPLE")
	if path == "" {
		t.Skip("set DOCS_PDF_SAMPLE=<path> to write a sample PDF")
	}

	js := `{"type":"doc","content":[
		{"type":"heading","attrs":{"level":2},"content":[{"type":"text","text":"What the exporter can set"}]},
		{"type":"paragraph","content":[
			{"type":"text","text":"Ordinary prose, with "},
			{"type":"text","text":"bold","marks":[{"type":"strong"}]},
			{"type":"text","text":", "},
			{"type":"text","text":"italic","marks":[{"type":"em"}]},
			{"type":"text","text":", and "},
			{"type":"text","text":"code()","marks":[{"type":"code"}]},
			{"type":"text","text":" in it. Accents (café, naïve, Zoë) and punctuation the web is full of — em dashes, “curly quotes” — come through the same path."}
		]},
		{"type":"paragraph","content":[
			{"type":"text","text":"This sentence is set in the serif face","marks":[{"type":"font_serif"}]},
			{"type":"text","text":", this one is larger","marks":[{"type":"size_lg"}]},
			{"type":"text","text":", and this one is small.","marks":[{"type":"size_sm"}]}
		]},
		{"type":"heading","attrs":{"level":3},"content":[{"type":"text","text":"Lists"}]},
		{"type":"bullet_list","content":[
			{"type":"list_item","content":[{"type":"paragraph","content":[{"type":"text","text":"A bullet, long enough that it has to wrap onto a second line so the hanging indent is visible and can be judged rather than assumed."}]}]},
			{"type":"list_item","content":[
				{"type":"paragraph","content":[{"type":"text","text":"A bullet with a list inside it"}]},
				{"type":"ordered_list","content":[
					{"type":"list_item","content":[{"type":"paragraph","content":[{"type":"text","text":"First"}]}]},
					{"type":"list_item","content":[{"type":"paragraph","content":[{"type":"text","text":"Second"}]}]}
				]}
			]}
		]},
		{"type":"blockquote","content":[
			{"type":"paragraph","content":[{"type":"text","text":"A quotation, set italic and grey with a rule down its left edge, long enough to wrap so the rule can be seen to run the whole height of it rather than only beside the first line."}]}
		]},
		{"type":"paragraph","content":[{"type":"text","text":"A closing paragraph."}]}
	]}`

	doc, err := export.Parse("Sample document", js)
	if err != nil {
		t.Fatal(err)
	}
	data, report, err := export.PDF(doc)
	if err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(path, data, 0o644); err != nil {
		t.Fatal(err)
	}
	t.Logf("wrote %s (%d bytes), %s", path, len(data), report)
}