// Copyright 2016-2019, Pulumi Corporation.
//
// 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 workspace

import (
	"testing"

	"github.com/blang/semver"
	"github.com/stretchr/testify/assert"
)

func TestPluginSelection_ExactMatch(t *testing.T) {
	v1 := semver.MustParse("0.1.0")
	v2 := semver.MustParse("0.2.0")
	v3 := semver.MustParse("0.3.0")
	candidatePlugins := []PluginInfo{
		{
			Name:    "myplugin",
			Kind:    ResourcePlugin,
			Version: &v1,
		},
		{
			Name:    "myplugin",
			Kind:    ResourcePlugin,
			Version: &v2,
		},
		{
			Name:    "myplugin",
			Kind:    ResourcePlugin,
			Version: &v3,
		},
		{
			Name:    "notmyplugin",
			Kind:    ResourcePlugin,
			Version: &v3,
		},
		{
			Name:    "myplugin",
			Kind:    AnalyzerPlugin,
			Version: &v3,
		},
	}

	requested := semver.MustParseRange("0.2.0")
	result, err := SelectCompatiblePlugin(candidatePlugins, ResourcePlugin, "myplugin", requested)
	assert.NoError(t, err)
	assert.Equal(t, "myplugin", result.Name)
	assert.Equal(t, "0.2.0", result.Version.String())
}

func TestPluginSelection_ExactMatchNotFound(t *testing.T) {
	v1 := semver.MustParse("0.1.0")
	v2 := semver.MustParse("0.2.1")
	v3 := semver.MustParse("0.3.0")
	candidatePlugins := []PluginInfo{
		{
			Name:    "myplugin",
			Kind:    ResourcePlugin,
			Version: &v1,
		},
		{
			Name:    "myplugin",
			Kind:    ResourcePlugin,
			Version: &v2,
		},
		{
			Name:    "myplugin",
			Kind:    ResourcePlugin,
			Version: &v3,
		},
		{
			Name:    "notmyplugin",
			Kind:    ResourcePlugin,
			Version: &v3,
		},
		{
			Name:    "myplugin",
			Kind:    AnalyzerPlugin,
			Version: &v3,
		},
	}

	requested := semver.MustParseRange("0.2.0")
	_, err := SelectCompatiblePlugin(candidatePlugins, ResourcePlugin, "myplugin", requested)
	assert.Error(t, err)
}

func TestPluginSelection_PatchVersionSlide(t *testing.T) {
	v1 := semver.MustParse("0.1.0")
	v2 := semver.MustParse("0.2.0")
	v21 := semver.MustParse("0.2.1")
	v3 := semver.MustParse("0.3.0")
	candidatePlugins := []PluginInfo{
		{
			Name:    "myplugin",
			Kind:    ResourcePlugin,
			Version: &v1,
		},
		{
			Name:    "myplugin",
			Kind:    ResourcePlugin,
			Version: &v2,
		},
		{
			Name:    "myplugin",
			Kind:    ResourcePlugin,
			Version: &v21,
		},
		{
			Name:    "myplugin",
			Kind:    ResourcePlugin,
			Version: &v3,
		},
		{
			Name:    "notmyplugin",
			Kind:    ResourcePlugin,
			Version: &v3,
		},
		{
			Name:    "myplugin",
			Kind:    AnalyzerPlugin,
			Version: &v3,
		},
	}

	requested := semver.MustParseRange(">=0.2.0 <0.3.0")
	result, err := SelectCompatiblePlugin(candidatePlugins, ResourcePlugin, "myplugin", requested)
	assert.NoError(t, err)
	assert.Equal(t, "myplugin", result.Name)
	assert.Equal(t, "0.2.1", result.Version.String())
}

func TestPluginSelection_EmptyVersionNoAlternatives(t *testing.T) {
	v1 := semver.MustParse("0.1.0")
	v2 := semver.MustParse("0.2.1")
	v3 := semver.MustParse("0.3.0")
	candidatePlugins := []PluginInfo{
		{
			Name:    "myplugin",
			Kind:    ResourcePlugin,
			Version: &v1,
		},
		{
			Name:    "myplugin",
			Kind:    ResourcePlugin,
			Version: &v2,
		},
		{
			Name:    "myplugin",
			Kind:    ResourcePlugin,
			Version: nil,
		},
		{
			Name:    "myplugin",
			Kind:    ResourcePlugin,
			Version: &v3,
		},
		{
			Name:    "notmyplugin",
			Kind:    ResourcePlugin,
			Version: &v3,
		},
		{
			Name:    "myplugin",
			Kind:    AnalyzerPlugin,
			Version: &v3,
		},
	}

	requested := semver.MustParseRange("0.2.0")
	result, err := SelectCompatiblePlugin(candidatePlugins, ResourcePlugin, "myplugin", requested)
	assert.NoError(t, err)
	assert.Equal(t, "myplugin", result.Name)
	assert.Nil(t, result.Version)
}

func TestPluginSelection_EmptyVersionWithAlternatives(t *testing.T) {
	v1 := semver.MustParse("0.1.0")
	v2 := semver.MustParse("0.2.0")
	v3 := semver.MustParse("0.3.0")
	candidatePlugins := []PluginInfo{
		{
			Name:    "myplugin",
			Kind:    ResourcePlugin,
			Version: &v1,
		},
		{
			Name:    "myplugin",
			Kind:    ResourcePlugin,
			Version: &v2,
		},
		{
			Name:    "myplugin",
			Kind:    ResourcePlugin,
			Version: nil,
		},
		{
			Name:    "myplugin",
			Kind:    ResourcePlugin,
			Version: nil,
		},
		{
			Name:    "myplugin",
			Kind:    ResourcePlugin,
			Version: &v3,
		},
		{
			Name:    "notmyplugin",
			Kind:    ResourcePlugin,
			Version: &v3,
		},
		{
			Name:    "myplugin",
			Kind:    AnalyzerPlugin,
			Version: &v3,
		},
	}

	requested := semver.MustParseRange("0.2.0")
	result, err := SelectCompatiblePlugin(candidatePlugins, ResourcePlugin, "myplugin", requested)
	assert.NoError(t, err)
	assert.Equal(t, "myplugin", result.Name)
	assert.Equal(t, "0.2.0", result.Version.String())
}