package metricsquality

import (
	"net/http"
	"net/http/httptest"
	"os"
	"path/filepath"
	"strings"
	"testing"

	"scm.bstein.dev/bstein/ananke/internal/metrics"
)

// TestExporterAppendsQualityGateMetrics runs one orchestration or CLI step.
// Signature: TestExporterAppendsQualityGateMetrics(t *testing.T).
// Why: verifies exporter output still includes host quality-gate metrics after
// the split-module migration.
func TestExporterAppendsQualityGateMetrics(t *testing.T) {
	tmp := t.TempDir()
	metricsPath := filepath.Join(tmp, "quality-gate.prom")
	content := strings.Join([]string{
		`# HELP ananke_quality_gate_runs_total Total quality gate runs by status.`,
		`# TYPE ananke_quality_gate_runs_total counter`,
		`ananke_quality_gate_runs_total{suite="ananke",status="ok"} 10`,
		`ananke_quality_gate_runs_total{suite="ananke",status="failed"} 2`,
		"",
	}, "\n")
	if err := os.WriteFile(metricsPath, []byte(content), 0o600); err != nil {
		t.Fatalf("write quality metrics file: %v", err)
	}
	t.Setenv("ANANKE_QUALITY_METRICS_FILE", metricsPath)

	exporter := metrics.New()
	req := httptest.NewRequest(http.MethodGet, "/metrics", nil)
	rr := httptest.NewRecorder()
	exporter.Handler("/metrics").ServeHTTP(rr, req)
	body := rr.Body.String()
	if !strings.Contains(body, `ananke_quality_gate_runs_total{suite="ananke",status="ok"} 10`) {
		t.Fatalf("expected quality gate metrics appended to exporter output, got:\n%s", body)
	}
}

// TestExporterDefaultsQualityGateMetrics runs one orchestration or CLI step.
// Signature: TestExporterDefaultsQualityGateMetrics(t *testing.T).
// Why: keeps zero-value quality-gate series visible before the host writes its
// first metrics file.
func TestExporterDefaultsQualityGateMetrics(t *testing.T) {
	t.Setenv("ANANKE_QUALITY_METRICS_FILE", filepath.Join(t.TempDir(), "missing.prom"))
	exporter := metrics.New()
	req := httptest.NewRequest(http.MethodGet, "/metrics", nil)
	rr := httptest.NewRecorder()
	exporter.Handler("/metrics").ServeHTTP(rr, req)
	body := rr.Body.String()
	if !strings.Contains(body, `ananke_quality_gate_runs_total{suite="ananke",status="ok"} 0`) {
		t.Fatalf("expected default ok=0 quality gate metric, got:\n%s", body)
	}
	if !strings.Contains(body, `ananke_quality_gate_runs_total{suite="ananke",status="failed"} 0`) {
		t.Fatalf("expected default failed=0 quality gate metric, got:\n%s", body)
	}
}