package catalogue

import (
	"strings"
	"testing"
)

// A jail whose pattern names <HOST> twice is refused by name: fail2ban would read it as a duplicate
// capture group and refuse its whole configuration, leaving the machine with no bans at all — which
// is what happened on the control node the day this was built (novox/hq ADR 0179).
func TestAJailsPatternNamesTheHostOncePerShape(t *testing.T) {
	twice := Manifest{Module: "route-proxy", Jails: []Jail{{
		Name:      "route-proxy",
		Failregex: `^.*(?:refused for <HOST>:\d+|asked from <HOST>:\d+)$`,
		Jail:      "backend = systemd",
	}}}
	problems := twice.jailProblems()
	if len(problems) != 1 || !strings.Contains(problems[0], "names <HOST> 2 times") {
		t.Fatalf("a pattern naming <HOST> twice was not refused by name: %v", problems)
	}
	if !strings.Contains(problems[0], "no bans at all") {
		t.Errorf("the refusal does not say what it costs: %q", problems[0])
	}

	// The same two shapes, one pattern each, is how it is written — and is accepted.
	split := Manifest{Module: "route-proxy", Jails: []Jail{{
		Name:      "route-proxy",
		Failregex: "^.*refused for <HOST>:\\d+$\n            ^.*asked from <HOST>:\\d+$",
		Jail:      "backend = systemd",
	}}}
	if problems := split.jailProblems(); len(problems) != 0 {
		t.Fatalf("one <HOST> per pattern was refused: %v", problems)
	}
}

// A jail with no name, no pattern, or a name another jail of the same module already took is refused.
func TestAJailIsNamedOnceAndSaysWhatAFailureLooksLike(t *testing.T) {
	m := Manifest{Module: "mailu", Jails: []Jail{
		{Name: "", Failregex: "^.*rip=<HOST>$"},
		{Name: "mailu-front", Failregex: "  "},
		{Name: "mailu-front", Failregex: "^.*rip=<HOST>$"},
	}}
	problems := strings.Join(m.jailProblems(), "\n")
	for _, want := range []string{"a jail with no name", "says nothing a failed attempt looks like", "two jails called"} {
		if !strings.Contains(problems, want) {
			t.Errorf("missing %q in:\n%s", want, problems)
		}
	}
}