package main

import "testing"

func TestAllowlist_Empty_OpenToAll(t *testing.T) {
	a := NewAllowlist("")
	if !a.Open() {
		t.Fatal("expected open=true on empty raw")
	}
	if !a.IsAllowed(0) || !a.IsAllowed(123456789) {
		t.Fatal("open allowlist should allow any user")
	}
}

func TestAllowlist_Whitespace_OpenToAll(t *testing.T) {
	a := NewAllowlist("   \t\n  ")
	if !a.Open() {
		t.Fatal("whitespace-only should be treated as empty")
	}
}

func TestAllowlist_OneID(t *testing.T) {
	a := NewAllowlist("7497777082")
	if a.Open() {
		t.Fatal("non-empty should not be open")
	}
	if !a.IsAllowed(7497777082) {
		t.Fatal("listed user must be allowed")
	}
	if a.IsAllowed(999) {
		t.Fatal("stranger must be rejected")
	}
}

func TestAllowlist_MultiCSVWithSpaces(t *testing.T) {
	a := NewAllowlist(" 12345 , 67890 ,  42 ")
	if a.Size() != 3 {
		t.Fatalf("expected 3, got %d", a.Size())
	}
	for _, id := range []int64{12345, 67890, 42} {
		if !a.IsAllowed(id) {
			t.Fatalf("id=%d should be allowed", id)
		}
	}
	if a.IsAllowed(999) {
		t.Fatal("999 must be rejected")
	}
}

func TestAllowlist_InvalidEntriesIgnored(t *testing.T) {
	a := NewAllowlist("123,abc,,456,not-a-number")
	if a.Size() != 2 {
		t.Fatalf("expected 2 valid ids, got %d", a.Size())
	}
	if !a.IsAllowed(123) || !a.IsAllowed(456) {
		t.Fatal("valid ids should pass")
	}
}

func TestAllowlist_AllInvalid_ClosedNotOpen(t *testing.T) {
	a := NewAllowlist("abc,xyz")
	if a.Open() {
		t.Fatal("CSV with no valid ids should be closed (fail-safe), not open")
	}
	if a.IsAllowed(123) {
		t.Fatal("must reject everyone when no valid ids")
	}
}