package metrics

// P5a task 07: the sift_pdf_* series.

import (
	"io"
	"net/http/httptest"
	"strings"
	"testing"
	"time"
)

type zeroSrc struct{}

func (zeroSrc) Snapshot() Snapshot { return Snapshot{} }

func TestPDFSeries(t *testing.T) {
	s := New(zeroSrc{})
	s.ObservePDF("ok", 1500*time.Millisecond, 212)
	s.ObservePDF("ok", 200*time.Millisecond, 3)
	s.ObservePDF("no_text", 50*time.Millisecond, 0)
	s.ObservePDF("blocked: evil.example", time.Millisecond, 0) // raw text never becomes a label
	s.ObservePDFWait(2 * time.Second)
	s.PDFCacheHit()
	s.PDFCacheHit()

	req := httptest.NewRequest("GET", "/metrics", nil)
	req.RemoteAddr, req.Host = "127.0.0.1:9", "127.0.0.1:8890"
	rec := httptest.NewRecorder()
	s.Handler().ServeHTTP(rec, req)
	body, _ := io.ReadAll(rec.Body)
	out := string(body)
	for _, want := range []string{
		`sift_pdf_extract_total{outcome="ok"} 2`,
		`sift_pdf_extract_total{outcome="no_text"} 1`,
		`sift_pdf_extract_total{outcome="other"} 1`,
		`sift_pdf_pages_total 215`,
		`sift_pdf_cache_hits_total 2`,
		`sift_pdf_extract_seconds_count 4`,
		`sift_pdf_pool_wait_seconds_count 1`,
	} {
		if !strings.Contains(out, want) {
			t.Errorf("metrics lack %q", want)
		}
	}
	if strings.Contains(out, "evil.example") {
		t.Error("a raw outcome string leaked into a label")
	}
}