package permissions

import "testing"

func TestHas(t *testing.T) {
	set := VIEW_CHANNEL | SEND_MESSAGES | MENTION_EVERYONE

	if !Has(set, VIEW_CHANNEL) {
		t.Fatal("expected VIEW_CHANNEL")
	}
	if !Has(set, SEND_MESSAGES) {
		t.Fatal("expected SEND_MESSAGES")
	}
	if Has(set, KICK_MEMBERS) {
		t.Fatal("did not expect KICK_MEMBERS")
	}
	if !Has(set, VIEW_CHANNEL|SEND_MESSAGES) {
		t.Fatal("expected multi-bit all-present")
	}
	if Has(set, VIEW_CHANNEL|KICK_MEMBERS) {
		t.Fatal("multi-bit should require all bits")
	}
}

func TestAdministratorBypassSemantics(t *testing.T) {
	// Client/backend convention: ADMINISTRATOR implies all gates when checked separately.
	if !Has(ADMINISTRATOR, ADMINISTRATOR) {
		t.Fatal("admin flag self")
	}
	// ADMINISTRATOR alone does not set other bits; Has is pure bit check.
	if Has(ADMINISTRATOR, KICK_MEMBERS) {
		t.Fatal("Has is not an admin-implies-all helper; CheckPermission does that")
	}
}

func TestDefaultEveryoneDoesNotIncludeMentionEveryone(t *testing.T) {
	if Has(DefaultEveryonePermissions, MENTION_EVERYONE) {
		t.Fatal("@everyone default must not grant MENTION_EVERYONE")
	}
	if !Has(DefaultEveryonePermissions, SEND_MESSAGES) {
		t.Fatal("@everyone default should grant SEND_MESSAGES")
	}
}

func TestAddRemove(t *testing.T) {
	p := int64(0)
	p = Add(p, VIEW_CHANNEL)
	p = Add(p, KICK_MEMBERS)
	if !Has(p, VIEW_CHANNEL|KICK_MEMBERS) {
		t.Fatal("Add failed")
	}
	p = Remove(p, KICK_MEMBERS)
	if Has(p, KICK_MEMBERS) {
		t.Fatal("Remove failed")
	}
	if !Has(p, VIEW_CHANNEL) {
		t.Fatal("Remove cleared wrong bit")
	}
}