package pgp

import (
	"os"
	"os/exec"
	"path/filepath"
	"runtime"

	. "gopkg.in/check.v1"
)

type GnupgSuite struct {
	bins string
}

var _ = Suite(&GnupgSuite{})

func (s *GnupgSuite) SetUpSuite(c *C) {
	_, _File, _, _ := runtime.Caller(0)
	s.bins = filepath.Join(filepath.Dir(_File), "test-bins")
}

// If gpg == gpg1 = pick gpg
func (s *GnupgSuite) TestGPG1(c *C) {
	origPath := os.Getenv("PATH")
	_ = os.Setenv("PATH", filepath.Join(s.bins, "gpg1"))
	defer func() { _ = os.Setenv("PATH", origPath) }()

	signer := NewGpgSigner(GPG1Finder())
	c.Assert(signer.gpg, Equals, "gpg")
}

// gpg(2) + gpg1 installed = pick gpg1
func (s *GnupgSuite) TestGPG1Not2(c *C) {
	origPath := os.Getenv("PATH")
	_ = os.Setenv("PATH", filepath.Join(s.bins, "gpg2-and-1"))
	defer func() { _ = os.Setenv("PATH", origPath) }()

	signer := NewGpgSigner(GPG1Finder())
	c.Assert(signer.gpg, Equals, "gpg1")
}

// If gpg == gpg2 and no gpg1 is available = error
func (s *GnupgSuite) TestGPGNothing(c *C) {
	origPath := os.Getenv("PATH")
	_ = os.Setenv("PATH", filepath.Join(s.bins, "gpg2-only"))
	defer func() { _ = os.Setenv("PATH", origPath) }()

	c.Assert(func() { NewGpgSigner(GPG1Finder()) }, PanicMatches, `Couldn't find a suitable gpg executable.+`)
}

// If gpgv == gpgv1 = pick gpgv
func (s *GnupgSuite) TestGPGV1(c *C) {
	origPath := os.Getenv("PATH")
	_ = os.Setenv("PATH", filepath.Join(s.bins, "gpgv1")+":"+filepath.Join(s.bins, "gpg1"))
	defer func() { _ = os.Setenv("PATH", origPath) }()

	verifier := NewGpgVerifier(GPG1Finder())
	c.Assert(verifier.gpgv, Equals, "gpgv")
}

// gpgv(2) + gpgv1 installed = pick gpgv1
func (s *GnupgSuite) TestGPGV1Not2(c *C) {
	origPath := os.Getenv("PATH")
	_ = os.Setenv("PATH", filepath.Join(s.bins, "gpgv2-and-1")+":"+filepath.Join(s.bins, "gpg1"))
	defer func() { _ = os.Setenv("PATH", origPath) }()

	verifier := NewGpgVerifier(GPG1Finder())
	c.Assert(verifier.gpgv, Equals, "gpgv1")
}

// If gpgv == gpgv2 and no gpgv1 is available = error
func (s *GnupgSuite) TestGPGVNothing(c *C) {
	origPath := os.Getenv("PATH")
	_ = os.Setenv("PATH", filepath.Join(s.bins, "gpgv2-only")+":"+filepath.Join(s.bins, "gpg1"))
	defer func() { _ = os.Setenv("PATH", origPath) }()

	c.Assert(func() { NewGpgVerifier(GPG1Finder()) }, PanicMatches, `Couldn't find a suitable gpg executable.+`)
}

type Gnupg1VerifierSuite struct {
	VerifierSuite
}

var _ = Suite(&Gnupg1VerifierSuite{})

func (s *Gnupg1VerifierSuite) SetUpTest(c *C) {
	finder := GPG1Finder()
	_, _, err := finder.FindGPG()
	if err != nil {
		c.Skip(err.Error())
	}

	s.verifier = NewGpgVerifier(finder)
	s.verifier.AddKeyring("./trusted.gpg")

	c.Assert(s.verifier.InitKeyring(false), IsNil)
}

type Gnupg1SignerSuite struct {
	SignerSuite
}

var _ = Suite(&Gnupg1SignerSuite{})

func (s *Gnupg1SignerSuite) SetUpTest(c *C) {
	finder := GPG1Finder()
	_, _, err := finder.FindGPG()
	if err != nil {
		c.Skip(err.Error())
	}

	s.keyringNoPassphrase = [2]string{"../system/files/aptly.pub", "../system/files/aptly.sec"}
	s.keyringPassphrase = [2]string{"../system/files/aptly_passphrase.pub", "../system/files/aptly_passphrase.sec"}
	s.passphraseKey = "F30E8CB9CDDE2AF8"
	s.noPassphraseKey = "21DBB89C16DB3E6D"

	s.signer = NewGpgSigner(finder)
	s.signer.SetBatch(true)

	s.verifier = &GoVerifier{}
	s.verifier.AddKeyring("../system/files/aptly.pub")
	s.verifier.AddKeyring("../system/files/aptly_passphrase.pub")

	c.Assert(s.verifier.InitKeyring(false), IsNil)

	s.SignerSuite.SetUpTest(c)
}

type Gnupg2VerifierSuite struct {
	VerifierSuite
}

var _ = Suite(&Gnupg2VerifierSuite{})

func (s *Gnupg2VerifierSuite) SetUpTest(c *C) {
	finder := GPG2Finder()
	_, _, err := finder.FindGPG()
	if err != nil {
		c.Skip(err.Error())
	}

	s.verifier = NewGpgVerifier(finder)
	s.verifier.AddKeyring("./trusted.gpg")

	c.Assert(s.verifier.InitKeyring(false), IsNil)
}

type Gnupg2SignerSuite struct {
	SignerSuite
}

var _ = Suite(&Gnupg2SignerSuite{})

func (s *Gnupg2SignerSuite) SetUpTest(c *C) {
	finder := GPG2Finder()
	gpg, ver, err := finder.FindGPG()
	if err != nil {
		c.Skip(err.Error())
	}
	if ver == GPG21x {
		c.Skip("skipping sign test on GnuPG 2.1.x, due to loopback pinentry mode troubles")
	}

	// import private keys into gpg2, they're stored outside of keyring files
	for _, item := range []struct {
		suffix string
		key    string
	}{
		{"", "751DF85C2B220D45"},
		{"_passphrase", "6656CD181E92D2D5"},
	} {
		if _, err := exec.Command(gpg, "--list-secret-keys", item.key).CombinedOutput(); err == nil {
			// key already exists
			continue
		}

		args := []string{"--import", "--no-default-keyring", "--batch"}

		if item.suffix == "_passprhase" {
			args = append(args, "--passphrase", "verysecret", "--no-tty")
			if ver >= GPG21x {
				args = append(args, "--pinentry-mode", "loopback")
			}
		}
		args = append(args, "../system/files/aptly2"+item.suffix+".sec.armor")

		output, err := exec.Command(gpg, args...).CombinedOutput()
		c.Log(string(output))
		c.Check(err, IsNil)
	}

	// import public keys into gpg2
	// we can't use pre-built keyrings as gpg 2.0.x and 2.1+ have different keyring formats
	for _, suffix := range []string{"", "_passphrase"} {
		output, err := exec.Command(gpg, "--no-default-keyring", "--batch", "--keyring", "../system/files/aptly2"+suffix+".gpg",
			"--import", "../system/files/aptly2"+suffix+".pub.armor").CombinedOutput()
		c.Log(string(output))
		c.Check(err, IsNil)
	}

	s.keyringNoPassphrase = [2]string{"../system/files/aptly2.gpg", ""}
	s.keyringPassphrase = [2]string{"../system/files/aptly2_passphrase.gpg", ""}
	s.noPassphraseKey = "751DF85C2B220D45"
	s.passphraseKey = "6656CD181E92D2D5"

	s.signer = NewGpgSigner(finder)
	s.signer.SetBatch(true)

	s.verifier = &GoVerifier{}
	s.verifier.AddKeyring("../system/files/aptly2_trusted.pub")

	c.Assert(s.verifier.InitKeyring(false), IsNil)

	s.skipDefaultKey = true

	s.SignerSuite.SetUpTest(c)
}

func (s *Gnupg2SignerSuite) TearDownTest(c *C) {
	s.SignerSuite.TearDownTest(c)

	_ = os.Remove("../system/files/aptly2.gpg")
	_ = os.Remove("../system/files/aptly2_passphrase.gpg")
}