package maven

import (
	"fmt"
	piperhttp "github.com/SAP/jenkins-library/pkg/http"
	"github.com/SAP/jenkins-library/pkg/mock"
	"github.com/stretchr/testify/assert"
	"net/http"
	"os"
	"testing"
)

func TestSettings(t *testing.T) {

	defer func() {
		getenv = os.Getenv
	}()

	getenv = func(name string) string {
		if name == "M2_HOME" {
			return "/usr/share/maven"
		} else if name == "HOME" {
			return "/home/me"
		}
		return ""
	}

	t.Run("Settings file source location not provided", func(t *testing.T) {

		utilsMock := newSettingsDownloadTestUtilsBundle()

		err := downloadAndCopySettingsFile("", "foo", utilsMock)

		assert.EqualError(t, err, "Settings file source location not provided")
	})

	t.Run("Settings file destination location not provided", func(t *testing.T) {

		utilsMock := newSettingsDownloadTestUtilsBundle()

		err := downloadAndCopySettingsFile("/opt/sap/maven/global-settings.xml", "", utilsMock)

		assert.EqualError(t, err, "Settings file destination location not provided")
	})

	t.Run("Retrieve settings files", func(t *testing.T) {

		utilsMock := newSettingsDownloadTestUtilsBundle()

		utilsMock.AddFile("/opt/sap/maven/global-settings.xml", []byte(""))
		utilsMock.AddFile("/opt/sap/maven/project-settings.xml", []byte(""))

		err := DownloadAndCopySettingsFiles("/opt/sap/maven/global-settings.xml", "/opt/sap/maven/project-settings.xml", utilsMock)

		if assert.NoError(t, err) {
			assert.True(t, utilsMock.HasCopiedFile("/opt/sap/maven/global-settings.xml", "/usr/share/maven/conf/settings.xml"))
			assert.True(t, utilsMock.HasCopiedFile("/opt/sap/maven/project-settings.xml", "/home/me/.m2/settings.xml"))
		}

		assert.Empty(t, utilsMock.downloadedFiles)
	})

	t.Run("Retrieve settings file via http", func(t *testing.T) {

		utilsMock := newSettingsDownloadTestUtilsBundle()

		err := downloadAndCopySettingsFile("https://example.org/maven/global-settings.xml", "/usr/share/maven/conf/settings.xml", utilsMock)

		if assert.NoError(t, err) {
			assert.Equal(t, "/usr/share/maven/conf/settings.xml", utilsMock.downloadedFiles["https://example.org/maven/global-settings.xml"])
		}
	})

	t.Run("Retrieve settings file via http - received error from downloader", func(t *testing.T) {

		utilsMock := newSettingsDownloadTestUtilsBundle()
		utilsMock.expectedError = fmt.Errorf("Download failed")

		err := downloadAndCopySettingsFile("https://example.org/maven/global-settings.xml", "/usr/share/maven/conf/settings.xml", utilsMock)

		if assert.Error(t, err) {
			assert.Contains(t, err.Error(), "failed to download maven settings from URL")
		}
	})

	t.Run("Retrieve project settings file - file not found", func(t *testing.T) {

		utilsMock := newSettingsDownloadTestUtilsBundle()

		err := downloadAndCopySettingsFile("/opt/sap/maven/project-settings.xml", "/home/me/.m2/settings.xml", utilsMock)

		if assert.Error(t, err) {
			assert.Contains(t, err.Error(), "cannot copy '/opt/sap/maven/project-settings.xml': file does not exist")
		}
	})
}

func newSettingsDownloadTestUtilsBundle() *settingsDownloadTestUtils {
	utilsBundle := settingsDownloadTestUtils{
		FilesMock: &mock.FilesMock{},
	}
	return &utilsBundle
}

type settingsDownloadTestUtils struct {
	*mock.FilesMock
	expectedError   error
	downloadedFiles map[string]string // src, dest
}

func (c *settingsDownloadTestUtils) SetOptions(options piperhttp.ClientOptions) {
}

func (c *settingsDownloadTestUtils) DownloadFile(url, filename string, header http.Header, cookies []*http.Cookie) error {

	if c.expectedError != nil {
		return c.expectedError
	}

	if c.downloadedFiles == nil {
		c.downloadedFiles = make(map[string]string)
	}
	c.downloadedFiles[url] = filename
	return nil
}