/*
Copyright (c) Edgeless Systems GmbH

SPDX-License-Identifier: AGPL-3.0-only
*/

package cmd

import (
	"errors"
	"os"
	"path/filepath"
	"time"

	"github.com/edgelesssys/constellation/v2/internal/api/versionsapi"
	"github.com/edgelesssys/constellation/v2/internal/cloud/cloudprovider"
	"github.com/spf13/cobra"
	"go.uber.org/zap/zapcore"
)

type commonFlags struct {
	rawImage           string
	pki                string
	provider           cloudprovider.Provider
	attestationVariant string
	secureBoot         bool
	version            versionsapi.Version
	timestamp          time.Time
	region             string
	bucket             string
	distributionID     string
	out                string
	logLevel           zapcore.Level
}

func parseCommonFlags(cmd *cobra.Command) (commonFlags, error) {
	workspaceDir := os.Getenv("BUILD_WORKSPACE_DIRECTORY")
	rawImage, err := cmd.Flags().GetString("raw-image")
	if err != nil {
		return commonFlags{}, err
	}
	pki, err := cmd.Flags().GetString("pki")
	if err != nil {
		return commonFlags{}, err
	}
	if pki == "" {
		pki = filepath.Join(workspaceDir, "image/pki")
	}
	attestationVariant, err := cmd.Flags().GetString("attestation-variant")
	if err != nil {
		return commonFlags{}, err
	}
	secureBoot, err := cmd.Flags().GetBool("secure-boot")
	if err != nil {
		return commonFlags{}, err
	}
	version, err := cmd.Flags().GetString("version")
	if err != nil {
		return commonFlags{}, err
	}
	ver, err := versionsapi.NewVersionFromShortPath(version, versionsapi.VersionKindImage)
	if err != nil {
		return commonFlags{}, err
	}
	timestamp, err := cmd.Flags().GetString("timestamp")
	if err != nil {
		return commonFlags{}, err
	}
	if timestamp == "" {
		timestamp = time.Now().Format("2006-01-02T15:04:05Z07:00")
	}
	timestmp, err := time.Parse("2006-01-02T15:04:05Z07:00", timestamp)
	if err != nil {
		return commonFlags{}, err
	}
	region, err := cmd.Flags().GetString("region")
	if err != nil {
		return commonFlags{}, err
	}
	bucket, err := cmd.Flags().GetString("bucket")
	if err != nil {
		return commonFlags{}, err
	}
	distributionID, err := cmd.Flags().GetString("distribution-id")
	if err != nil {
		return commonFlags{}, err
	}
	out, err := cmd.Flags().GetString("out")
	if err != nil {
		return commonFlags{}, err
	}
	verbose, err := cmd.Flags().GetBool("verbose")
	if err != nil {
		return commonFlags{}, err
	}
	logLevel := zapcore.InfoLevel
	if verbose {
		logLevel = zapcore.DebugLevel
	}

	return commonFlags{
		rawImage:           rawImage,
		pki:                pki,
		attestationVariant: attestationVariant,
		secureBoot:         secureBoot,
		version:            ver,
		timestamp:          timestmp,
		region:             region,
		bucket:             bucket,
		distributionID:     distributionID,
		out:                out,
		logLevel:           logLevel,
	}, nil
}

type awsFlags struct {
	commonFlags
	awsRegion string
	awsBucket string
}

func parseAWSFlags(cmd *cobra.Command) (awsFlags, error) {
	common, err := parseCommonFlags(cmd)
	if err != nil {
		return awsFlags{}, err
	}

	awsRegion, err := cmd.Flags().GetString("aws-region")
	if err != nil {
		return awsFlags{}, err
	}
	awsBucket, err := cmd.Flags().GetString("aws-bucket")
	if err != nil {
		return awsFlags{}, err
	}

	common.provider = cloudprovider.AWS
	return awsFlags{
		commonFlags: common,
		awsRegion:   awsRegion,
		awsBucket:   awsBucket,
	}, nil
}

type azureFlags struct {
	commonFlags
	azSubscription  string
	azLocation      string
	azResourceGroup string
}

func parseAzureFlags(cmd *cobra.Command) (azureFlags, error) {
	common, err := parseCommonFlags(cmd)
	if err != nil {
		return azureFlags{}, err
	}

	azSubscription, err := cmd.Flags().GetString("az-subscription")
	if err != nil {
		return azureFlags{}, err
	}
	azLocation, err := cmd.Flags().GetString("az-location")
	if err != nil {
		return azureFlags{}, err
	}
	azResourceGroup, err := cmd.Flags().GetString("az-resource-group")
	if err != nil {
		return azureFlags{}, err
	}

	common.provider = cloudprovider.Azure
	return azureFlags{
		commonFlags:     common,
		azSubscription:  azSubscription,
		azLocation:      azLocation,
		azResourceGroup: azResourceGroup,
	}, nil
}

type gcpFlags struct {
	commonFlags
	gcpProject  string
	gcpLocation string
	gcpBucket   string
}

func parseGCPFlags(cmd *cobra.Command) (gcpFlags, error) {
	common, err := parseCommonFlags(cmd)
	if err != nil {
		return gcpFlags{}, err
	}

	gcpProject, err := cmd.Flags().GetString("gcp-project")
	if err != nil {
		return gcpFlags{}, err
	}
	gcpLocation, err := cmd.Flags().GetString("gcp-location")
	if err != nil {
		return gcpFlags{}, err
	}
	gcpBucket, err := cmd.Flags().GetString("gcp-bucket")
	if err != nil {
		return gcpFlags{}, err
	}

	common.provider = cloudprovider.GCP
	return gcpFlags{
		commonFlags: common,
		gcpProject:  gcpProject,
		gcpLocation: gcpLocation,
		gcpBucket:   gcpBucket,
	}, nil
}

type s3Flags struct {
	region         string
	bucket         string
	distributionID string
	logLevel       zapcore.Level
}

func parseS3Flags(cmd *cobra.Command) (s3Flags, error) {
	region, err := cmd.Flags().GetString("region")
	if err != nil {
		return s3Flags{}, err
	}
	bucket, err := cmd.Flags().GetString("bucket")
	if err != nil {
		return s3Flags{}, err
	}
	distributionID, err := cmd.Flags().GetString("distribution-id")
	if err != nil {
		return s3Flags{}, err
	}
	verbose, err := cmd.Flags().GetBool("verbose")
	if err != nil {
		return s3Flags{}, err
	}
	logLevel := zapcore.InfoLevel
	if verbose {
		logLevel = zapcore.DebugLevel
	}

	return s3Flags{
		region:         region,
		bucket:         bucket,
		distributionID: distributionID,
		logLevel:       logLevel,
	}, nil
}

type measurementsFlags struct {
	s3Flags
	measurementsPath string
	signaturePath    string
}

func parseUploadMeasurementsFlags(cmd *cobra.Command) (measurementsFlags, error) {
	s3, err := parseS3Flags(cmd)
	if err != nil {
		return measurementsFlags{}, err
	}

	measurementsPath, err := cmd.Flags().GetString("measurements")
	if err != nil {
		return measurementsFlags{}, err
	}
	signaturePath, err := cmd.Flags().GetString("signature")
	if err != nil {
		return measurementsFlags{}, err
	}

	return measurementsFlags{
		s3Flags:          s3,
		measurementsPath: measurementsPath,
		signaturePath:    signaturePath,
	}, nil
}

type mergeMeasurementsFlags struct {
	out      string
	logLevel zapcore.Level
}

func parseMergeMeasurementsFlags(cmd *cobra.Command) (mergeMeasurementsFlags, error) {
	out, err := cmd.Flags().GetString("out")
	if err != nil {
		return mergeMeasurementsFlags{}, err
	}
	verbose, err := cmd.Flags().GetBool("verbose")
	if err != nil {
		return mergeMeasurementsFlags{}, err
	}
	logLevel := zapcore.InfoLevel
	if verbose {
		logLevel = zapcore.DebugLevel
	}

	return mergeMeasurementsFlags{
		out:      out,
		logLevel: logLevel,
	}, nil
}

type envelopeMeasurementsFlags struct {
	version            versionsapi.Version
	csp                cloudprovider.Provider
	attestationVariant string
	in, out            string
	logLevel           zapcore.Level
}

func parseEnvelopeMeasurementsFlags(cmd *cobra.Command) (envelopeMeasurementsFlags, error) {
	version, err := cmd.Flags().GetString("version")
	if err != nil {
		return envelopeMeasurementsFlags{}, err
	}
	ver, err := versionsapi.NewVersionFromShortPath(version, versionsapi.VersionKindImage)
	if err != nil {
		return envelopeMeasurementsFlags{}, err
	}
	csp, err := cmd.Flags().GetString("csp")
	if err != nil {
		return envelopeMeasurementsFlags{}, err
	}
	provider := cloudprovider.FromString(csp)
	attestationVariant, err := cmd.Flags().GetString("attestation-variant")
	if err != nil {
		return envelopeMeasurementsFlags{}, err
	}
	if provider == cloudprovider.Unknown {
		return envelopeMeasurementsFlags{}, errors.New("unknown cloud provider")
	}
	in, err := cmd.Flags().GetString("in")
	if err != nil {
		return envelopeMeasurementsFlags{}, err
	}
	out, err := cmd.Flags().GetString("out")
	if err != nil {
		return envelopeMeasurementsFlags{}, err
	}
	verbose, err := cmd.Flags().GetBool("verbose")
	if err != nil {
		return envelopeMeasurementsFlags{}, err
	}
	logLevel := zapcore.InfoLevel
	if verbose {
		logLevel = zapcore.DebugLevel
	}

	return envelopeMeasurementsFlags{
		version:            ver,
		csp:                provider,
		attestationVariant: attestationVariant,
		in:                 in,
		out:                out,
		logLevel:           logLevel,
	}, nil
}