package upsquality

import (
	"context"
	"os"
	"path/filepath"
	"strings"
	"testing"

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

// TestNUTProviderReadCommandFailure runs one orchestration or CLI step.
// Signature: TestNUTProviderReadCommandFailure(t *testing.T).
// Why: ensures upsc execution failures are surfaced with target context.
func TestNUTProviderReadCommandFailure(t *testing.T) {
	dir := t.TempDir()
	upsc := filepath.Join(dir, "upsc")
	script := "#!/usr/bin/env sh\necho boom >&2\nexit 7\n"
	if err := os.WriteFile(upsc, []byte(script), 0o755); err != nil {
		t.Fatalf("write fake upsc: %v", err)
	}
	t.Setenv("PATH", dir+":"+os.Getenv("PATH"))

	p := ups.NewNUTProvider("statera@localhost")
	_, err := p.Read(context.Background())
	if err == nil || !strings.Contains(err.Error(), "upsc statera@localhost") {
		t.Fatalf("expected contextual upsc failure, got %v", err)
	}
}

// TestNUTProviderReadCoversNumericParseFailureBranch runs one orchestration or CLI step.
// Signature: TestNUTProviderReadCoversNumericParseFailureBranch(t *testing.T).
// Why: exercises parseFloat failure branch after symbol stripping.
func TestNUTProviderReadCoversNumericParseFailureBranch(t *testing.T) {
	dir := t.TempDir()
	upsc := filepath.Join(dir, "upsc")
	script := `#!/usr/bin/env sh
cat <<'EOF'
ups.status: OB
battery.runtime: 10
battery.charge: ++
ups.load: --
ups.realpower.nominal: ..
EOF
`
	if err := os.WriteFile(upsc, []byte(script), 0o755); err != nil {
		t.Fatalf("write fake upsc: %v", err)
	}
	t.Setenv("PATH", dir+":"+os.Getenv("PATH"))

	p := ups.NewNUTProvider("pyrphoros@localhost")
	sample, err := p.Read(context.Background())
	if err != nil {
		t.Fatalf("read sample: %v", err)
	}
	if !sample.OnBattery {
		t.Fatalf("expected OB status to set OnBattery, got %+v", sample)
	}
	if sample.BatteryCharge != 0 || sample.LoadPercent != 0 || sample.NominalPowerW != 0 {
		t.Fatalf("expected parse failures to leave numeric fields at zero, got %+v", sample)
	}
}

// TestNUTProviderReadScannerTooLongError runs one orchestration or CLI step.
// Signature: TestNUTProviderReadScannerTooLongError(t *testing.T).
// Why: covers scanner error handling branch for malformed oversized NUT output lines.
func TestNUTProviderReadScannerTooLongError(t *testing.T) {
	dir := t.TempDir()
	upsc := filepath.Join(dir, "upsc")
	long := strings.Repeat("x", 80*1024)
	script := "#!/usr/bin/env sh\nprintf '%s\\n' '" + long + "'\n"
	if err := os.WriteFile(upsc, []byte(script), 0o755); err != nil {
		t.Fatalf("write fake upsc: %v", err)
	}
	t.Setenv("PATH", dir+":"+os.Getenv("PATH"))

	p := ups.NewNUTProvider("oversize@localhost")
	if _, err := p.Read(context.Background()); err == nil {
		t.Fatalf("expected scanner token-size parse error")
	}
}