package panel

import (
	"strings"
	"testing"
)

// Item 20: the stable channel compares V-series display versions with
// the segment rule; the native self-update is systemd-gated and records
// its outcome in the shared update status file.

func TestDisplayUpdateFields(t *testing.T) {
	// The test binary runs the default display version V1.0.0.
	if disp, avail := displayUpdateFields("V1.0.1"); disp != "V1.0.1" || !avail {
		t.Fatalf("V1.0.1 vs V1.0.0 = %q, %v; want V1.0.1, true", disp, avail)
	}
	if disp, avail := displayUpdateFields("V1.0.0"); disp != "V1.0.0" || avail {
		t.Fatalf("V1.0.0 vs V1.0.0 = %q, %v; want V1.0.0, false", disp, avail)
	}
	if disp, avail := displayUpdateFields("3.7.0-agent.1"); disp != "" || avail {
		t.Fatalf("legacy tag = %q, %v; want empty, false", disp, avail)
	}
	if _, avail := displayUpdateFields("V1.0.9"); !avail {
		t.Fatal("V1.0.9 must be newer than V1.0.0")
	}
}

func TestServiceUnitFromCgroup(t *testing.T) {
	content := "0::/system.slice/x-ui.service\n"
	if got := serviceUnitFromCgroup(content); got != "x-ui" {
		t.Fatalf("unit = %q, want x-ui", got)
	}
	if got := serviceUnitFromCgroup("0::/user.slice/session-3.scope\n"); got != "" {
		t.Fatalf("unit = %q, want empty", got)
	}
	if got := serviceUnitFromCgroup(""); got != "" {
		t.Fatalf("unit = %q, want empty", got)
	}
}

func TestNativeUpdateStatusRoundtrip(t *testing.T) {
	t.Setenv("XUI_DB_FOLDER", t.TempDir())
	writeUpdateStatus(424242, updateStateSuccess, 0)
	st := (&PanelService{}).GetUpdateStatus()
	if st.RunID != "424242" || st.State != updateStateSuccess || st.ExitCode != 0 {
		t.Fatalf("status roundtrip = %+v", st)
	}
	writeUpdateStatus(424243, updateStateFailed, 1)
	st = (&PanelService{}).GetUpdateStatus()
	if st.RunID != "424243" || st.State != updateStateFailed || st.ExitCode != 1 {
		t.Fatalf("status roundtrip = %+v", st)
	}
}

func TestStartUpdateStableRequiresSystemd(t *testing.T) {
	// Force the gate closed regardless of the host running the test.
	orig := nativeSystemdAvailable
	nativeSystemdAvailable = func() bool { return false }
	t.Cleanup(func() { nativeSystemdAvailable = orig })

	_, err := (&PanelService{}).startNativeUpdate()
	if err == nil || !strings.Contains(err.Error(), "systemd") {
		t.Fatalf("want systemd gate error, got %v", err)
	}
}