// Copyright 2023 The age Authors
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd

package plugin

import (
	"io"
	"os"
	"path/filepath"
	"runtime"
	"testing"

	"filippo.io/age"
	"filippo.io/age/internal/bech32"
)

func TestMain(m *testing.M) {
	switch filepath.Base(os.Args[0]) {
	case "age-plugin-test":
		p, _ := New("test")
		p.HandleRecipient(func(data []byte) (age.Recipient, error) {
			return testRecipient{}, nil
		})
		os.Exit(p.Main())
	case "age-plugin-testpqc":
		p, _ := New("testpqc")
		p.HandleRecipient(func(data []byte) (age.Recipient, error) {
			return testPQCRecipient{}, nil
		})
		os.Exit(p.Main())
	default:
		os.Exit(m.Run())
	}
}

type testRecipient struct{}

func (testRecipient) Wrap(fileKey []byte) ([]*age.Stanza, error) {
	return []*age.Stanza{{Type: "test", Body: fileKey}}, nil
}

type testPQCRecipient struct{}

var _ age.RecipientWithLabels = testPQCRecipient{}

func (testPQCRecipient) Wrap(fileKey []byte) ([]*age.Stanza, error) {
	return []*age.Stanza{{Type: "test", Body: fileKey}}, nil
}

func (testPQCRecipient) WrapWithLabels(fileKey []byte) ([]*age.Stanza, []string, error) {
	return []*age.Stanza{{Type: "test", Body: fileKey}}, []string{"postquantum"}, nil
}

func TestLabels(t *testing.T) {
	if runtime.GOOS == "windows" {
		t.Skip("Windows support is TODO")
	}
	temp := t.TempDir()
	testOnlyPluginPath = temp
	t.Cleanup(func() { testOnlyPluginPath = "" })
	ex, err := os.Executable()
	if err != nil {
		t.Fatal(err)
	}
	if err := os.Link(ex, filepath.Join(temp, "age-plugin-test")); err != nil {
		t.Fatal(err)
	}
	if err := os.Chmod(filepath.Join(temp, "age-plugin-test"), 0755); err != nil {
		t.Fatal(err)
	}
	if err := os.Link(ex, filepath.Join(temp, "age-plugin-testpqc")); err != nil {
		t.Fatal(err)
	}
	if err := os.Chmod(filepath.Join(temp, "age-plugin-testpqc"), 0755); err != nil {
		t.Fatal(err)
	}

	name, err := bech32.Encode("age1test", nil)
	if err != nil {
		t.Fatal(err)
	}
	testPlugin, err := NewRecipient(name, &ClientUI{})
	if err != nil {
		t.Fatal(err)
	}
	namePQC, err := bech32.Encode("age1testpqc", nil)
	if err != nil {
		t.Fatal(err)
	}
	testPluginPQC, err := NewRecipient(namePQC, &ClientUI{})
	if err != nil {
		t.Fatal(err)
	}

	if _, err := age.Encrypt(io.Discard, testPluginPQC); err != nil {
		t.Errorf("expected one pqc to work, got %v", err)
	}
	if _, err := age.Encrypt(io.Discard, testPluginPQC, testPluginPQC); err != nil {
		t.Errorf("expected two pqc to work, got %v", err)
	}
	if _, err := age.Encrypt(io.Discard, testPluginPQC, testPlugin); err == nil {
		t.Errorf("expected one pqc and one normal to fail")
	}
	if _, err := age.Encrypt(io.Discard, testPlugin, testPluginPQC); err == nil {
		t.Errorf("expected one pqc and one normal to fail")
	}
}