// Copyright 2016 CNI 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 invoke_test

import (
	"context"
	"io/ioutil"
	"os"
	"path/filepath"
	"runtime"

	"github.com/containernetworking/cni/pkg/invoke"
	"github.com/containernetworking/cni/pkg/version"
	"github.com/containernetworking/cni/pkg/version/testhelpers"

	. "github.com/onsi/ginkgo"
	. "github.com/onsi/ginkgo/extensions/table"
	. "github.com/onsi/gomega"
)

var _ = Describe("GetVersion, integration tests", func() {
	var (
		pluginDir  string
		pluginPath string
	)

	BeforeEach(func() {
		pluginDir, err := ioutil.TempDir("", "plugins")
		Expect(err).NotTo(HaveOccurred())
		pluginPath = filepath.Join(pluginDir, "test-plugin")
		if runtime.GOOS == "windows" {
			pluginPath += ".exe"
		}
	})

	AfterEach(func() {
		Expect(os.RemoveAll(pluginDir)).To(Succeed())
	})

	DescribeTable("correctly reporting plugin versions",
		func(gitRef string, pluginSource string, expectedVersions version.PluginInfo) {
			Expect(testhelpers.BuildAt([]byte(pluginSource), gitRef, pluginPath)).To(Succeed())
			versionInfo, err := invoke.GetVersionInfo(context.TODO(), pluginPath, nil)
			Expect(err).NotTo(HaveOccurred())

			Expect(versionInfo.SupportedVersions()).To(ConsistOf(expectedVersions.SupportedVersions()))
		},

		Entry("historical: before VERSION was introduced",
			git_ref_v010, plugin_source_no_custom_versions,
			version.PluginSupports("0.1.0"),
		),

		Entry("historical: when VERSION was introduced but plugins couldn't customize it",
			git_ref_v020_no_custom_versions, plugin_source_no_custom_versions,
			version.PluginSupports("0.1.0", "0.2.0"),
		),

		Entry("historical: when plugins started reporting their own version list",
			git_ref_v020_custom_versions, plugin_source_v020_custom_versions,
			version.PluginSupports("0.2.0", "0.999.0"),
		),

		Entry("historical: before CHECK was introduced",
			git_ref_v031, plugin_source_v020_custom_versions,
			version.PluginSupports("0.2.0", "0.999.0"),
		),

		// this entry tracks the current behavior.  Before you change it, ensure
		// that its previous behavior is captured in the most recent "historical" entry
		Entry("current",
			"HEAD", plugin_source_v040_check,
			version.PluginSupports("0.2.0", "0.4.0", "0.999.0"),
		),
	)
})

// A 0.4.0 plugin that supports CHECK
const plugin_source_v040_check = `package main

import (
	"github.com/containernetworking/cni/pkg/skel"
	"github.com/containernetworking/cni/pkg/version"
	"fmt"
)

func c(_ *skel.CmdArgs) error { fmt.Println("{}"); return nil }

func main() { skel.PluginMain(c, c, c, version.PluginSupports("0.2.0", "0.4.0", "0.999.0"), "") }
`

const git_ref_v031 = "909fe7d"

// a 0.2.0 plugin that can report its own versions
const plugin_source_v020_custom_versions = `package main

import (
	"github.com/containernetworking/cni/pkg/skel"
	"github.com/containernetworking/cni/pkg/version"
	"fmt"
)

func c(_ *skel.CmdArgs) error { fmt.Println("{}"); return nil }

func main() { skel.PluginMain(c, c, version.PluginSupports("0.2.0", "0.999.0")) }
`
const git_ref_v020_custom_versions = "bf31ed15"

// a minimal 0.1.0 / 0.2.0 plugin that cannot report it's own version support
const plugin_source_no_custom_versions = `package main

import "github.com/containernetworking/cni/pkg/skel"
import "fmt"

func c(_ *skel.CmdArgs) error { fmt.Println("{}"); return nil }

func main() { skel.PluginMain(c, c) }
`

const git_ref_v010 = "2c482f4"
const git_ref_v020_no_custom_versions = "349d66d"
