// Copyright 2016-2018, 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 (
	"os"
	"path/filepath"
	"testing"

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

func TestGetValidDefaultProjectName(t *testing.T) {
	// Valid names remain the same.
	for _, name := range getValidProjectNamePrefixes() {
		assert.Equal(t, name, getValidProjectName(name))
	}
	assert.Equal(t, "foo", getValidProjectName("foo"))
	assert.Equal(t, "foo1", getValidProjectName("foo1"))
	assert.Equal(t, "foo-", getValidProjectName("foo-"))
	assert.Equal(t, "foo-bar", getValidProjectName("foo-bar"))
	assert.Equal(t, "foo_", getValidProjectName("foo_"))
	assert.Equal(t, "foo_bar", getValidProjectName("foo_bar"))
	assert.Equal(t, "foo.", getValidProjectName("foo."))
	assert.Equal(t, "foo.bar", getValidProjectName("foo.bar"))

	// Invalid characters are left off.
	assert.Equal(t, "foo", getValidProjectName("!foo"))
	assert.Equal(t, "foo", getValidProjectName("@foo"))
	assert.Equal(t, "foo", getValidProjectName("#foo"))
	assert.Equal(t, "foo", getValidProjectName("$foo"))
	assert.Equal(t, "foo", getValidProjectName("%foo"))
	assert.Equal(t, "foo", getValidProjectName("^foo"))
	assert.Equal(t, "foo", getValidProjectName("&foo"))
	assert.Equal(t, "foo", getValidProjectName("*foo"))
	assert.Equal(t, "foo", getValidProjectName("(foo"))
	assert.Equal(t, "foo", getValidProjectName(")foo"))

	// Invalid names are replaced with a fallback name.
	assert.Equal(t, "project", getValidProjectName("!"))
	assert.Equal(t, "project", getValidProjectName("@"))
	assert.Equal(t, "project", getValidProjectName("#"))
	assert.Equal(t, "project", getValidProjectName("$"))
	assert.Equal(t, "project", getValidProjectName("%"))
	assert.Equal(t, "project", getValidProjectName("^"))
	assert.Equal(t, "project", getValidProjectName("&"))
	assert.Equal(t, "project", getValidProjectName("*"))
	assert.Equal(t, "project", getValidProjectName("("))
	assert.Equal(t, "project", getValidProjectName(")"))
	assert.Equal(t, "project", getValidProjectName("!@#$%^&*()"))
}

func getValidProjectNamePrefixes() []string {
	var results []string
	for ch := 'A'; ch <= 'Z'; ch++ {
		results = append(results, string(ch))
	}
	for ch := 'a'; ch <= 'z'; ch++ {
		results = append(results, string(ch))
	}
	results = append(results, "_")
	results = append(results, ".")
	return results
}

func TestRetrieveNonExistingTemplate(t *testing.T) {
	tests := []struct {
		testName     string
		templateKind TemplateKind
	}{
		{
			testName:     "TemplateKindPulumiProject",
			templateKind: TemplateKindPulumiProject,
		},
		{
			testName:     "TemplateKindPolicyPack",
			templateKind: TemplateKindPolicyPack,
		},
	}

	templateName := "not-the-template-that-exists-in-pulumi-repo-nor-on-disk"
	for _, tt := range tests {
		t.Run(tt.testName, func(t *testing.T) {
			_, err := RetrieveTemplates(templateName, false, tt.templateKind)
			assert.NotNil(t, err)
		})
	}
}

func TestRetrieveStandardTemplate(t *testing.T) {
	tests := []struct {
		testName     string
		templateKind TemplateKind
		templateName string
	}{
		{
			testName:     "TemplateKindPulumiProject",
			templateKind: TemplateKindPulumiProject,
			templateName: "typescript",
		},
		{
			testName:     "TemplateKindPolicyPack",
			templateKind: TemplateKindPolicyPack,
			templateName: "aws-typescript",
		},
	}

	for _, tt := range tests {
		t.Run(tt.testName, func(t *testing.T) {
			repository, err := RetrieveTemplates(tt.templateName, false, tt.templateKind)
			assert.Nil(t, err)
			assert.Equal(t, false, repository.ShouldDelete)

			// Root should point to Pulumi templates directory
			// (e.g. ~/.pulumi/templates or ~/.pulumi/templates-policy)
			templateDir, _ := GetTemplateDir(tt.templateKind)
			assert.Equal(t, templateDir, repository.Root)

			// SubDirectory should be a direct subfolder of Root with the name of the template
			expectedPath := filepath.Join(repository.Root, tt.templateName)
			assert.Equal(t, expectedPath, repository.SubDirectory)
		})
	}
}

func TestRetrieveHttpsTemplate(t *testing.T) {
	tests := []struct {
		testName        string
		templateKind    TemplateKind
		templateURL     string
		yamlFile        string
		expectedSubPath []string
	}{
		{
			testName:        "TemplateKindPulumiProject",
			templateKind:    TemplateKindPulumiProject,
			templateURL:     "https://github.com/pulumi/pulumi-aws/tree/master/examples/minimal",
			yamlFile:        "Pulumi.yaml",
			expectedSubPath: []string{"examples", "minimal"},
		},
		{
			testName:        "TemplateKindPolicyPack",
			templateKind:    TemplateKindPolicyPack,
			templateURL:     "https://github.com/pulumi/examples/tree/master/policy-packs/aws-advanced",
			yamlFile:        "PulumiPolicy.yaml",
			expectedSubPath: []string{"policy-packs", "aws-advanced"},
		},
	}

	for _, tt := range tests {
		t.Run(tt.testName, func(t *testing.T) {
			repository, err := RetrieveTemplates(tt.templateURL, false, tt.templateKind)
			assert.Nil(t, err)
			assert.Equal(t, true, repository.ShouldDelete)

			// Root should point to a subfolder of a Temp Dir
			tempDir := os.TempDir()
			pattern := filepath.Join(tempDir, "*")
			matched, _ := filepath.Match(pattern, repository.Root)
			assert.True(t, matched)

			// SubDirectory follows the path of the template in the Git repo
			pathElements := append([]string{repository.Root}, tt.expectedSubPath...)
			expectedPath := filepath.Join(pathElements...)
			assert.Equal(t, expectedPath, repository.SubDirectory)

			// SubDirectory should exist and contain the template files
			yamlPath := filepath.Join(repository.SubDirectory, tt.yamlFile)
			_, err = os.Stat(yamlPath)
			assert.Nil(t, err)

			// Clean Up
			err = repository.Delete()
			assert.Nil(t, err)
		})
	}
}

func TestRetrieveHttpsTemplateOffline(t *testing.T) {
	tests := []struct {
		testName     string
		templateKind TemplateKind
		templateURL  string
	}{
		{
			testName:     "TemplateKindPulumiProject",
			templateKind: TemplateKindPulumiProject,
			templateURL:  "https://github.com/pulumi/pulumi-aws/tree/master/examples/minimal",
		},
		{
			testName:     "TemplateKindPolicyPack",
			templateKind: TemplateKindPolicyPack,
			templateURL:  "https://github.com/pulumi/examples/tree/master/policy-packs/aws-advanced",
		},
	}

	for _, tt := range tests {
		t.Run(tt.testName, func(t *testing.T) {
			_, err := RetrieveTemplates(tt.templateURL, true, tt.templateKind)
			assert.NotNil(t, err)
		})
	}
}

func TestRetrieveFileTemplate(t *testing.T) {
	tests := []struct {
		testName     string
		templateKind TemplateKind
	}{
		{
			testName:     "TemplateKindPulumiProject",
			templateKind: TemplateKindPulumiProject,
		},
		{
			testName:     "TemplateKindPolicyPack",
			templateKind: TemplateKindPolicyPack,
		},
	}

	for _, tt := range tests {
		t.Run(tt.testName, func(t *testing.T) {
			repository, err := RetrieveTemplates(".", false, tt.templateKind)
			assert.Nil(t, err)
			assert.Equal(t, false, repository.ShouldDelete)

			// Both Root and SubDirectory just point to the (existing) specified folder
			assert.Equal(t, ".", repository.Root)
			assert.Equal(t, ".", repository.SubDirectory)
		})
	}
}