// SPDX-License-Identifier: BSD-3-Clause

package cli_test

import (
	"strings"
	"testing"

	cli "dns.froth.zone/awl/cmd"
	"dns.froth.zone/awl/pkg/util"
	"github.com/miekg/dns"
	"gotest.tools/v3/assert"
)

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

	args := []string{
		"go.dev",
		"AAAA",
		"@1.1.1.1",
		"+ignore",
	}
	opts := new(util.Options)
	opts.Logger = util.InitLogger(0)
	err := cli.ParseMiscArgs(args, opts)
	assert.NilError(t, err)
	assert.Equal(t, opts.Request.Name, "go.dev.")
	assert.Equal(t, opts.Request.Type, dns.StringToType["AAAA"])
	assert.Equal(t, opts.Request.Server, "1.1.1.1")
	assert.Equal(t, opts.Truncate, true)
}

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

	args := []string{}
	opts := new(util.Options)
	opts.Logger = util.InitLogger(0)
	err := cli.ParseMiscArgs(args, opts)
	assert.NilError(t, err)
	assert.Equal(t, opts.Request.Name, ".")
	assert.Equal(t, opts.Request.Type, dns.StringToType["NS"])
}

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

	args := []string{
		"golang.org.",
	}
	opts := new(util.Options)
	opts.Logger = util.InitLogger(0)
	err := cli.ParseMiscArgs(args, opts)
	assert.NilError(t, err)
	assert.Equal(t, opts.Request.Name, "golang.org.")
	assert.Equal(t, opts.Request.Type, dns.StringToType["A"])
}

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

	args := []string{"8.8.8.8"}
	opts := new(util.Options)
	opts.Logger = util.InitLogger(0)
	opts.Reverse = true
	err := cli.ParseMiscArgs(args, opts)
	assert.NilError(t, err)
	assert.Equal(t, opts.Request.Type, dns.StringToType["PTR"])
}

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

	args := []string{"8.88.8"}
	opts := new(util.Options)
	opts.Logger = util.InitLogger(0)
	opts.Reverse = true
	err := cli.ParseMiscArgs(args, opts)
	assert.ErrorContains(t, err, "unrecognized address")
}

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

	tests := []struct {
		in   string
		want string
	}{
		{"DNSCrypt", "sdns://AQMAAAAAAAAAETk0LjE0MC4xNC4xNDo1NDQzINErR_JS3PLCu_iZEIbq95zkSV2LFsigxDIuUso_OQhzIjIuZG5zY3J5cHQuZGVmYXVsdC5uczEuYWRndWFyZC5jb20"},
		{"TLS", "dns.google"},
		{"HTTPS", "https://dns.cloudflare.com"},
		{"QUIC", "dns.froth.zone"},
	}

	for _, test := range tests {
		test := test

		t.Run(test.in, func(t *testing.T) {
			t.Parallel()
			args := []string{}
			opts := new(util.Options)
			opts.Logger = util.InitLogger(0)
			switch test.in {
			case "DNSCrypt":
				opts.DNSCrypt = true
			case "TLS":
				opts.TLS = true
			case "HTTPS":
				opts.HTTPS = true
			case "QUIC":
				opts.QUIC = true
			}
			err := cli.ParseMiscArgs(args, opts)
			assert.NilError(t, err)
			assert.Equal(t, opts.Request.Server, test.want)
		})
	}
}

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

	tests := []struct {
		in       string
		expected string
		over     string
	}{
		{"@sdns://AQMAAAAAAAAAETk0LjE0MC4xNC4xNDo1NDQzINErR_JS3PLCu_iZEIbq95zkSV2LFsigxDIuUso_OQhzIjIuZG5zY3J5cHQuZGVmYXVsdC5uczEuYWRndWFyZC5jb20", "sdns://AQMAAAAAAAAAETk0LjE0MC4xNC4xNDo1NDQzINErR_JS3PLCu_iZEIbq95zkSV2LFsigxDIuUso_OQhzIjIuZG5zY3J5cHQuZGVmYXVsdC5uczEuYWRndWFyZC5jb20", "DNSCrypt"},
		{"@tls://dns.google", "dns.google", "TLS"},
		{"@https://dns.cloudflare.com/dns-query", "https://dns.cloudflare.com/dns-query", "HTTPS"},
		{"@https://dns.example.net/a", "https://dns.example.net/a", "HTTPS with a set path"},
		{"@quic://dns.adguard.com", "dns.adguard.com", "QUIC"},
		{"@tcp://dns.froth.zone", "dns.froth.zone", "TCP"},
		{"@udp://dns.example.com", "dns.example.com", "UDP"},
	}

	for _, test := range tests {
		test := test

		t.Run(test.over, func(t *testing.T) {
			t.Parallel()

			opts := new(util.Options)
			opts.Logger = util.InitLogger(0)

			err := cli.ParseMiscArgs([]string{test.in}, opts)
			assert.NilError(t, err)
			switch {
			case strings.HasPrefix(test.over, "DNSCrypt"):
				assert.Assert(t, opts.DNSCrypt)
				assert.Equal(t, opts.Request.Server, test.expected)
			case strings.HasPrefix(test.over, "TLS"):
				assert.Assert(t, opts.TLS)
				assert.Equal(t, opts.Request.Server, test.expected)
			case strings.HasPrefix(test.over, "HTTPS"):
				assert.Assert(t, opts.HTTPS)
				assert.Equal(t, opts.Request.Server, test.expected)
			case strings.HasPrefix(test.over, "QUIC"):
				assert.Assert(t, opts.QUIC)
				assert.Equal(t, opts.Request.Server, test.expected)
			case strings.HasPrefix(test.over, "TCP"):
				assert.Assert(t, opts.TCP)
				assert.Equal(t, opts.Request.Server, test.expected)
			case strings.HasPrefix(test.over, "UDP"):
				assert.Assert(t, true)
				assert.Equal(t, opts.Request.Server, test.expected)
			}
		})
	}
}

func FuzzParseArgs(f *testing.F) {
	cases := []string{
		"go.dev",
		"AAAA",
		"@1.1.1.1",
		"+ignore",
		"e",
	}

	for _, tc := range cases {
		f.Add(tc)
	}

	f.Fuzz(func(t *testing.T, arg string) {
		// Get rid of outputs

		args := []string{arg}
		opts := new(util.Options)
		opts.Logger = util.InitLogger(0)
		//nolint:errcheck,gosec // Only make sure the program does not crash
		cli.ParseMiscArgs(args, opts)
	})
}