// Copyright 2015 Matthew Holt and The Caddy Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package caddy

import (
	"reflect"
	"testing"
)

func TestSplitNetworkAddress(t *testing.T) {
	for i, tc := range []struct {
		input         string
		expectNetwork string
		expectHost    string
		expectPort    string
		expectErr     bool
	}{
		{
			input:     "",
			expectErr: true,
		},
		{
			input:      "foo",
			expectHost: "foo",
		},
		{
			input: ":", // empty host & empty port
		},
		{
			input:     "::",
			expectErr: true,
		},
		{
			input:      "[::]",
			expectHost: "::",
		},
		{
			input:      ":1234",
			expectPort: "1234",
		},
		{
			input:      "foo:1234",
			expectHost: "foo",
			expectPort: "1234",
		},
		{
			input:      "foo:1234-5678",
			expectHost: "foo",
			expectPort: "1234-5678",
		},
		{
			input:         "udp/foo:1234",
			expectNetwork: "udp",
			expectHost:    "foo",
			expectPort:    "1234",
		},
		{
			input:         "tcp6/foo:1234-5678",
			expectNetwork: "tcp6",
			expectHost:    "foo",
			expectPort:    "1234-5678",
		},
		{
			input:         "udp/",
			expectNetwork: "udp",
			expectErr:     true,
		},
		{
			input:         "unix//foo/bar",
			expectNetwork: "unix",
			expectHost:    "/foo/bar",
		},
		{
			input:         "unixgram//foo/bar",
			expectNetwork: "unixgram",
			expectHost:    "/foo/bar",
		},
		{
			input:         "unixpacket//foo/bar",
			expectNetwork: "unixpacket",
			expectHost:    "/foo/bar",
		},
	} {
		actualNetwork, actualHost, actualPort, err := SplitNetworkAddress(tc.input)
		if tc.expectErr && err == nil {
			t.Errorf("Test %d: Expected error but got %v", i, err)
		}
		if !tc.expectErr && err != nil {
			t.Errorf("Test %d: Expected no error but got %v", i, err)
		}
		if actualNetwork != tc.expectNetwork {
			t.Errorf("Test %d: Expected network '%s' but got '%s'", i, tc.expectNetwork, actualNetwork)
		}
		if actualHost != tc.expectHost {
			t.Errorf("Test %d: Expected host '%s' but got '%s'", i, tc.expectHost, actualHost)
		}
		if actualPort != tc.expectPort {
			t.Errorf("Test %d: Expected port '%s' but got '%s'", i, tc.expectPort, actualPort)
		}
	}
}

func TestJoinNetworkAddress(t *testing.T) {
	for i, tc := range []struct {
		network, host, port string
		expect              string
	}{
		{
			network: "", host: "", port: "",
			expect: "",
		},
		{
			network: "tcp", host: "", port: "",
			expect: "tcp/",
		},
		{
			network: "", host: "foo", port: "",
			expect: "foo",
		},
		{
			network: "", host: "", port: "1234",
			expect: ":1234",
		},
		{
			network: "", host: "", port: "1234-5678",
			expect: ":1234-5678",
		},
		{
			network: "", host: "foo", port: "1234",
			expect: "foo:1234",
		},
		{
			network: "udp", host: "foo", port: "1234",
			expect: "udp/foo:1234",
		},
		{
			network: "udp", host: "", port: "1234",
			expect: "udp/:1234",
		},
		{
			network: "unix", host: "/foo/bar", port: "",
			expect: "unix//foo/bar",
		},
		{
			network: "unix", host: "/foo/bar", port: "0",
			expect: "unix//foo/bar",
		},
		{
			network: "unix", host: "/foo/bar", port: "1234",
			expect: "unix//foo/bar",
		},
		{
			network: "", host: "::1", port: "1234",
			expect: "[::1]:1234",
		},
	} {
		actual := JoinNetworkAddress(tc.network, tc.host, tc.port)
		if actual != tc.expect {
			t.Errorf("Test %d: Expected '%s' but got '%s'", i, tc.expect, actual)
		}
	}
}

func TestParseNetworkAddress(t *testing.T) {
	for i, tc := range []struct {
		input      string
		expectAddr NetworkAddress
		expectErr  bool
	}{
		{
			input:     "",
			expectErr: true,
		},
		{
			input: ":",
			expectAddr: NetworkAddress{
				Network: "tcp",
			},
		},
		{
			input: "[::]",
			expectAddr: NetworkAddress{
				Network: "tcp",
				Host:    "::",
			},
		},
		{
			input: ":1234",
			expectAddr: NetworkAddress{
				Network:   "tcp",
				Host:      "",
				StartPort: 1234,
				EndPort:   1234,
			},
		},
		{
			input: "tcp/:1234",
			expectAddr: NetworkAddress{
				Network:   "tcp",
				Host:      "",
				StartPort: 1234,
				EndPort:   1234,
			},
		},
		{
			input: "tcp6/:1234",
			expectAddr: NetworkAddress{
				Network:   "tcp6",
				Host:      "",
				StartPort: 1234,
				EndPort:   1234,
			},
		},
		{
			input: "tcp4/localhost:1234",
			expectAddr: NetworkAddress{
				Network:   "tcp4",
				Host:      "localhost",
				StartPort: 1234,
				EndPort:   1234,
			},
		},
		{
			input: "unix//foo/bar",
			expectAddr: NetworkAddress{
				Network: "unix",
				Host:    "/foo/bar",
			},
		},
		{
			input: "localhost:1234-1234",
			expectAddr: NetworkAddress{
				Network:   "tcp",
				Host:      "localhost",
				StartPort: 1234,
				EndPort:   1234,
			},
		},
		{
			input:     "localhost:2-1",
			expectErr: true,
		},
		{
			input: "localhost:0",
			expectAddr: NetworkAddress{
				Network:   "tcp",
				Host:      "localhost",
				StartPort: 0,
				EndPort:   0,
			},
		},
		{
			input:     "localhost:1-999999999999",
			expectErr: true,
		},
	} {
		actualAddr, err := ParseNetworkAddress(tc.input)
		if tc.expectErr && err == nil {
			t.Errorf("Test %d: Expected error but got: %v", i, err)
		}
		if !tc.expectErr && err != nil {
			t.Errorf("Test %d: Expected no error but got: %v", i, err)
		}

		if actualAddr.Network != tc.expectAddr.Network {
			t.Errorf("Test %d: Expected network '%v' but got '%v'", i, tc.expectAddr, actualAddr)
		}
		if !reflect.DeepEqual(tc.expectAddr, actualAddr) {
			t.Errorf("Test %d: Expected addresses %v but got %v", i, tc.expectAddr, actualAddr)
		}
	}
}

func TestJoinHostPort(t *testing.T) {
	for i, tc := range []struct {
		pa     NetworkAddress
		offset uint
		expect string
	}{
		{
			pa: NetworkAddress{
				Network:   "tcp",
				Host:      "localhost",
				StartPort: 1234,
				EndPort:   1234,
			},
			expect: "localhost:1234",
		},
		{
			pa: NetworkAddress{
				Network:   "tcp",
				Host:      "localhost",
				StartPort: 1234,
				EndPort:   1235,
			},
			expect: "localhost:1234",
		},
		{
			pa: NetworkAddress{
				Network:   "tcp",
				Host:      "localhost",
				StartPort: 1234,
				EndPort:   1235,
			},
			offset: 1,
			expect: "localhost:1235",
		},
		{
			pa: NetworkAddress{
				Network: "unix",
				Host:    "/run/php/php7.3-fpm.sock",
			},
			expect: "/run/php/php7.3-fpm.sock",
		},
	} {
		actual := tc.pa.JoinHostPort(tc.offset)
		if actual != tc.expect {
			t.Errorf("Test %d: Expected '%s' but got '%s'", i, tc.expect, actual)
		}
	}
}

func TestExpand(t *testing.T) {
	for i, tc := range []struct {
		input  NetworkAddress
		expect []NetworkAddress
	}{
		{
			input: NetworkAddress{
				Network:   "tcp",
				Host:      "localhost",
				StartPort: 2000,
				EndPort:   2000,
			},
			expect: []NetworkAddress{
				{
					Network:   "tcp",
					Host:      "localhost",
					StartPort: 2000,
					EndPort:   2000,
				},
			},
		},
		{
			input: NetworkAddress{
				Network:   "tcp",
				Host:      "localhost",
				StartPort: 2000,
				EndPort:   2002,
			},
			expect: []NetworkAddress{
				{
					Network:   "tcp",
					Host:      "localhost",
					StartPort: 2000,
					EndPort:   2000,
				},
				{
					Network:   "tcp",
					Host:      "localhost",
					StartPort: 2001,
					EndPort:   2001,
				},
				{
					Network:   "tcp",
					Host:      "localhost",
					StartPort: 2002,
					EndPort:   2002,
				},
			},
		},
		{
			input: NetworkAddress{
				Network:   "tcp",
				Host:      "localhost",
				StartPort: 2000,
				EndPort:   1999,
			},
			expect: []NetworkAddress{},
		},
		{
			input: NetworkAddress{
				Network:   "unix",
				Host:      "/foo/bar",
				StartPort: 0,
				EndPort:   0,
			},
			expect: []NetworkAddress{
				{
					Network:   "unix",
					Host:      "/foo/bar",
					StartPort: 0,
					EndPort:   0,
				},
			},
		},
	} {
		actual := tc.input.Expand()
		if !reflect.DeepEqual(actual, tc.expect) {
			t.Errorf("Test %d: Expected %+v but got %+v", i, tc.expect, actual)
		}
	}
}