package reacquisition

import (
	"errors"
	"testing"
)

func TestValidateRejectsWhatTheCheckWouldReject(t *testing.T) {
	// Each case mirrors a CHECK in migration 0056. Validating in Go as well
	// means the API answers 400 with a readable message instead of surfacing
	// a constraint violation.
	cases := []struct {
		name string
		in   Settings
	}{
		{"zero grace would fire on every transient unmount",
			mutate(func(s *Settings) { s.GraceHours = 0 })},
		{"grace beyond a month", mutate(func(s *Settings) { s.GraceHours = 721 })},
		{"zero per pass means never sweep", mutate(func(s *Settings) { s.MaxPerPass = 0 })},
		{"per pass beyond the cap", mutate(func(s *Settings) { s.MaxPerPass = 201 })},
	}
	for _, c := range cases {
		t.Run(c.name, func(t *testing.T) {
			if err := validate(c.in); !errors.Is(err, ErrOutOfRange) {
				t.Errorf("validate() = %v, want ErrOutOfRange", err)
			}
		})
	}
}

func TestValidateAcceptsDefaults(t *testing.T) {
	if err := validate(Defaults); err != nil {
		t.Fatalf("the shipped defaults must be valid, got %v", err)
	}
}

func mutate(f func(*Settings)) Settings {
	s := Defaults
	f(&s)
	return s
}