package lists

import "testing"

func TestValidateEntries(t *testing.T) {
	t.Parallel()

	tests := []struct {
		name    string
		entries []string
		wantN   int
	}{
		{name: "empty list", entries: nil, wantN: 0},
		{name: "valid user", entries: []string{"user@example.com"}, wantN: 0},
		{name: "valid star domain", entries: []string{"*@example.com"}, wantN: 0},
		{name: "valid suffix glob", entries: []string{"*@*.shop", "*@*.ac.in"}, wantN: 0},
		{name: "valid plus addressing", entries: []string{"a.b+c@mail-host.co.uk"}, wantN: 0},
		{name: "repair then valid", entries: []string{"*vsa.instalily.ai"}, wantN: 0},
		{name: "missing at", entries: []string{"not-an-email"}, wantN: 1},
		{name: "bare domain", entries: []string{"example.com"}, wantN: 1},
		{name: "spaces", entries: []string{"user @example.com"}, wantN: 1},
		{name: "bad domain", entries: []string{"user@-example.com"}, wantN: 1},
		{name: "single label domain", entries: []string{"*@localhost"}, wantN: 1},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			t.Parallel()
			got := ValidateEntries(tt.entries)
			if len(got) != tt.wantN {
				t.Fatalf("ValidateEntries() issues=%v want %d", got, tt.wantN)
			}
		})
	}
}

func TestValidateEntryReasons(t *testing.T) {
	t.Parallel()
	if got := ValidateEntry(""); got == "" {
		t.Fatal("expected empty reason")
	}
	if got := ValidateEntry("lisa@simpsons.com"); got != "" {
		t.Fatalf("unexpected: %s", got)
	}
}