package main

import (
	"bytes"
	"fmt"
	"testing"

	"github.com/stretchr/testify/require"
)

func TestAdd(t *testing.T) {
	require := require.New(t)

	sshKeys := addSSHKeys([]*sshKey{}, []*sshKey{{algorithm: "ssh-ed25519", pubKey: "abcdefg"}})
	require.Len(sshKeys, 1)

	sshKeys = addSSHKeys(sshKeys, []*sshKey{{algorithm: "ssh-ed25519", pubKey: "abcdefg"}})
	require.Len(sshKeys, 1)

	sshKeys = addSSHKeys(sshKeys, []*sshKey{{algorithm: "ssh-ed25519", pubKey: "abcdefg", alias: "buxdehude"}})
	require.Len(sshKeys, 1)
	require.Equal("buxdehude", sshKeys[0].alias)

	sshKeys = addSSHKeys(sshKeys, []*sshKey{{algorithm: "ssh-ed25519", pubKey: "asdsadasd", alias: "hello@world"}})
	require.Len(sshKeys, 2)

	sshKeys = addSSHKeys(sshKeys, []*sshKey{{algorithm: "ssh-ed25519", pubKey: "asdsadasd", alias: "world@hello"}})
	require.Len(sshKeys, 2)
	require.Equal("hello@world", sshKeys[1].alias)

	sshKeys = addSSHKeys(sshKeys, []*sshKey{{algorithm: "ssh-ed25519", pubKey: "", alias: "world@hello"}})
	require.Len(sshKeys, 2)

	sshKeys = addSSHKeys(sshKeys, []*sshKey{{algorithm: "", pubKey: "asdsadasd", alias: "world@hello"}})
	require.Len(sshKeys, 2)
}

func TestRead(t *testing.T) {
	require := require.New(t)

	testCases := []struct {
		expectedSSHKeys []*sshKey
		b               []byte
	}{
		{
			expectedSSHKeys: []*sshKey{
				{algorithm: "ssh-ed25519", pubKey: "abcdefg", alias: "hello@world"},
			},
			b: []byte(`ssh-ed25519 abcdefg hello@world`),
		},
		{
			expectedSSHKeys: []*sshKey{
				{algorithm: "ssh-ed25519", pubKey: "abcdefg", alias: "hello@world"},
			},
			b: []byte(`ssh-ed25519 abcdefg hello@world
ssh-ed25519 abcdefg`),
		},
		{
			expectedSSHKeys: []*sshKey{
				{algorithm: "ssh-ed25519", pubKey: "abcdefg", alias: "hello@world"},
			},
			b: []byte(`ssh-ed25519 abcdefg
ssh-ed25519 abcdefg hello@world`),
		},
		{
			expectedSSHKeys: []*sshKey{
				{algorithm: "ssh-ed25519", pubKey: "abcdefg", alias: "hello@world"},
			},
			b: []byte(`ssh-ed25519 abcdefg hello@world
ssh-ed25519 abcdefg world@hello`),
		},
		{
			expectedSSHKeys: []*sshKey{
				{algorithm: "ssh-ed25519", pubKey: "abcdefg", alias: "hello@world"},
			},
			b: []byte(`ssh-ed25519 abcdefg hello@world
ssh-ed25519
  abcdefg test`),
		},
	}

	for i := range testCases {
		sshKeys, err := readSSHKeys(bytes.NewReader(testCases[i].b))
		require.NoError(err)
		require.ElementsMatch(testCases[i].expectedSSHKeys, sshKeys)
	}
}

func TestRemove(t *testing.T) {
	require := require.New(t)

	s := []*sshKey{
		{algorithm: "ssh-ed25519", pubKey: "sdfsdf", alias: "hello@world"},
		{algorithm: "ssh-rsa", pubKey: "asdfasdadsad", alias: "world@hello"},
	}

	r := []*sshKey{
		{algorithm: "ssh-ed25519", pubKey: "sdfsdf", alias: "hello@world"},
	}

	result := removeSSHKeys(s, r)
	require.Len(result, 1)

	r = []*sshKey{
		{algorithm: "ssh-ed25519", pubKey: "sdfsdf", alias: "hello@world"},
		{algorithm: "ssh-rsa", pubKey: "asdfasdadsad", alias: "world@hello"},
	}

	result = removeSSHKeys(s, r)
	require.Len(result, 0)

	r = []*sshKey{
		{algorithm: "ssh-ed25519", pubKey: "sdfsdf"},
	}

	result = removeSSHKeys(s, r)
	require.Len(result, 1)
}

func TestSSHKeyCompare(t *testing.T) {
	require := require.New(t)

	testCases := []struct {
		s             *sshKey
		r             *sshKey
		expectedValue bool
	}{
		{&sshKey{algorithm: "ssh-rsa", pubKey: "abcdefgh", alias: "world@hello"}, &sshKey{algorithm: "ssh-rsa", pubKey: "abcdefgh", alias: "world@hello"}, true},
		{&sshKey{algorithm: "ssh-rsa", pubKey: "abcdefgh", alias: "world@hello"}, &sshKey{algorithm: "ssh-rsa", pubKey: "abcdefgh"}, true},
		{&sshKey{algorithm: "ssh-rsa", pubKey: "abcdefgh"}, &sshKey{algorithm: "ssh-rsa", pubKey: "abcdefgh", alias: "world@hello"}, true},
		{&sshKey{algorithm: "ssh-rsa", pubKey: "abcdefgh", alias: "world@hello"}, &sshKey{algorithm: "ssh-ed25519", pubKey: "sdfsdf", alias: "hello@world"}, false},
		{&sshKey{algorithm: "ssh-rsa", pubKey: "abcdefgh", alias: "world@hello"}, &sshKey{algorithm: "ssh-rsa", pubKey: "sdfsdf", alias: "hello@world"}, false},
		{&sshKey{algorithm: "ssh-rsa", pubKey: "abcdefgh", alias: "world@hello"}, &sshKey{algorithm: "ssh-rsa", pubKey: "abcdefgh", alias: "hello@world"}, true},
	}

	for i := range testCases {
		require.Equal(testCases[i].expectedValue, testCases[i].s.Compare(testCases[i].r), "TestCase %v does not match the expected value", i)
	}
}

func TestSSHKeyString(t *testing.T) {
	require := require.New(t)

	s := []*sshKey{
		{algorithm: "ssh-ed25519", pubKey: "sdfsdf", alias: "hello@world"},
		{algorithm: "ssh-rsa", pubKey: "asdfasdadsad", alias: "world@hello"},
		{algorithm: "ssh-rsa", pubKey: "asdfasdsdfsfadsad"},
	}

	b := []string{
		"ssh-ed25519 sdfsdf hello@world",
		"ssh-rsa asdfasdadsad world@hello",
		"ssh-rsa asdfasdsdfsfadsad",
	}

	for i := range s {
		require.Equal(b[i], s[i].String())
	}
}

func TestSSHKeyValidate(t *testing.T) {
	require := require.New(t)

	testCases := []struct {
		s             *sshKey
		expectedValue error
	}{
		{&sshKey{algorithm: "ssh-rsa", pubKey: "abcdefgh", alias: "world@hello"}, nil},
		{&sshKey{algorithm: "ssh-rsa", pubKey: "abcdefgh"}, nil},
		{&sshKey{algorithm: "ssh-rsa", pubKey: ""}, fmt.Errorf("Missing attribute pubKey")},
		{&sshKey{algorithm: "ssh-rsa"}, fmt.Errorf("Missing attribute pubKey")},
		{&sshKey{algorithm: "", pubKey: "abcdefgh"}, fmt.Errorf("Missing attribute algorithm")},
		{&sshKey{pubKey: "abcdefgh"}, fmt.Errorf("Missing attribute algorithm")},
		{&sshKey{algorithm: "ssh-rsa", alias: "sdfsdf"}, fmt.Errorf("Missing attribute pubKey")},
		{&sshKey{pubKey: "abcdefgh", alias: "sdfsdf"}, fmt.Errorf("Missing attribute algorithm")},
	}

	for i := range testCases {
		if testCases[i].expectedValue == nil {
			require.NoError(testCases[i].s.Validate())
			continue
		}
		require.EqualError(testCases[i].expectedValue, testCases[i].s.Validate().Error())
	}
}

func TestWrite(t *testing.T) {
	require := require.New(t)

	testCases := []struct {
		expectedSSHKeys []*sshKey
		b               []byte
	}{
		{
			expectedSSHKeys: []*sshKey{
				{algorithm: "ssh-ed25519", pubKey: "abcdefg", alias: "hello@world"},
				{algorithm: "ssh-rsa", pubKey: "gfedcba"},
				{algorithm: "ssh-rsa", pubKey: "1234567", alias: "world@hello"},
			},
			b: []byte(`ssh-ed25519 abcdefg hello@world
ssh-rsa gfedcba
ssh-rsa 1234567 world@hello
`),
		},
	}

	for i := range testCases {
		b := bytes.NewBuffer([]byte{})
		err := writeSSHKeys(b, testCases[i].expectedSSHKeys)
		require.NoError(err)
		require.Equal(testCases[i].b, b.Bytes())
	}
}