// Copyright (c) Tailscale Inc & contributors
// SPDX-License-Identifier: BSD-3-Clause

package cli

import (
	"context"
	"strings"
	"testing"
)

func TestRunDNSQueryArgs(t *testing.T) {
	tests := []struct {
		name    string
		args    []string
		wantErr string
	}{
		{
			name:    "no_args",
			args:    []string{},
			wantErr: "missing required argument: name",
		},
		{
			name:    "flag_after_name",
			args:    []string{"example.com", "--json"},
			wantErr: "unexpected flags after query name: --json",
		},
		{
			name:    "flag_after_name_and_type",
			args:    []string{"example.com", "AAAA", "--json"},
			wantErr: "unexpected flags after query name: --json",
		},
		{
			name:    "extra_args_after_type",
			args:    []string{"example.com", "AAAA", "extra"},
			wantErr: "unexpected extra arguments: extra",
		},
		{
			name:    "multiple_extra_args",
			args:    []string{"example.com", "AAAA", "extra1", "extra2"},
			wantErr: "unexpected extra arguments: extra1 extra2",
		},
		{
			name:    "non_flag_then_flag",
			args:    []string{"example.com", "AAAA", "foo", "--json"},
			wantErr: "unexpected flags after query name: --json",
		},
		{
			name:    "multiple_misplaced_flags",
			args:    []string{"example.com", "--json", "--verbose"},
			wantErr: "unexpected flags after query name: --json, --verbose",
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			err := runDNSQuery(context.Background(), tt.args)
			if err == nil {
				t.Fatal("expected error, got nil")
			}
			if !strings.Contains(err.Error(), tt.wantErr) {
				t.Errorf("error = %q, want it to contain %q", err.Error(), tt.wantErr)
			}
		})
	}
}