package keyrotate

import (
	"encoding/hex"
	"fmt"

	"github.com/porter-dev/porter/internal/models"
	ints "github.com/porter-dev/porter/internal/models/integrations"
	gorm "github.com/porter-dev/porter/internal/repository/gorm"

	_gorm "gorm.io/gorm"
)

// process 100 records at a time
const stepSize = 100

func Rotate(db *_gorm.DB, oldKey, newKey *[32]byte) error {
	oldKeyBytes := make([]byte, 32)
	newKeyBytes := make([]byte, 32)

	copy(oldKeyBytes[:], oldKey[:])
	copy(newKeyBytes[:], newKey[:])

	err := rotateClusterModel(db, oldKey, newKey)
	if err != nil {
		fmt.Printf("failed on cluster rotation: %v\n", err)
		return err
	}

	err = rotateClusterCandidateModel(db, oldKey, newKey)

	if err != nil {
		fmt.Printf("failed on cc rotation: %v\n", err)

		return err
	}

	err = rotateRegistryModel(db, oldKey, newKey)

	if err != nil {
		fmt.Printf("failed on registry rotation: %v\n", err)

		return err
	}

	err = rotateHelmRepoModel(db, oldKey, newKey)

	if err != nil {
		fmt.Printf("failed on hr rotation: %v\n", err)

		return err
	}

	err = rotateInfraModel(db, oldKey, newKey)

	if err != nil {
		fmt.Printf("failed on infra rotation: %v\n", err)

		return err
	}

	err = rotateKubeIntegrationModel(db, oldKey, newKey)

	if err != nil {
		fmt.Printf("failed on ki rotation: %v\n", err)

		return err
	}

	err = rotateBasicIntegrationModel(db, oldKey, newKey)

	if err != nil {
		fmt.Printf("failed on basic rotation: %v\n", err)

		return err
	}

	err = rotateOIDCIntegrationModel(db, oldKey, newKey)

	if err != nil {
		fmt.Printf("failed on oidc rotation: %v\n", err)

		return err
	}

	err = rotateOAuthIntegrationModel(db, oldKey, newKey)

	if err != nil {
		fmt.Printf("failed on oauth rotation: %v\n", err)

		return err
	}

	err = rotateGCPIntegrationModel(db, oldKey, newKey)

	if err != nil {
		fmt.Printf("failed on gcp rotation: %v\n", err)

		return err
	}

	err = rotateAWSIntegrationModel(db, oldKey, newKey)

	if err != nil {
		fmt.Printf("failed on aws rotation: %v\n", err)

		return err
	}

	return nil
}

func rotateClusterModel(db *_gorm.DB, oldKey, newKey *[32]byte) error {
	// get count of model
	var count int64

	if err := db.Model(&models.Cluster{}).Count(&count).Error; err != nil {
		return err
	}

	// cluster-scoped repository
	repo := gorm.NewClusterRepository(db, oldKey).(*gorm.ClusterRepository)

	// iterate (count / stepSize) + 1 times using Limit and Offset
	for i := 0; i < (int(count)/stepSize)+1; i++ {
		clusters := []*models.Cluster{}

		if err := db.Order("id asc").Offset(i * stepSize).Limit(stepSize).Find(&clusters).Error; err != nil {
			return err
		}

		// decrypt with the old key
		for _, cluster := range clusters {
			// attach the token cache, not fatal if it fails
			db.Where("id = ?", cluster.TokenCacheID).First(&cluster.TokenCache)

			err := repo.DecryptClusterData(cluster, oldKey)
			if err != nil {
				fmt.Printf("error decrypting cluster %d\n", cluster.ID)

				// in these cases we'll wipe the data -- if it can't be decrypted, we can't
				// recover it
				if err := db.Unscoped().Where("id = ?", cluster.TokenCacheID).Delete(&ints.ClusterTokenCache{}).Error; err != nil {
					return err
				}
				cluster.TokenCacheID = 0
			}
		}

		// encrypt with the new key and re-insert
		for _, cluster := range clusters {
			err := repo.EncryptClusterData(cluster, newKey)
			if err != nil {
				fmt.Printf("error encrypting cluster %d\n", cluster.ID)

				return err
			}

			if err := db.Save(cluster).Error; err != nil {
				return err
			}

			if err := db.Save(&cluster.TokenCache).Error; err != nil {
				return err
			}
		}
	}

	fmt.Printf("rotated %d clusters\n", count)

	return nil
}

func rotateClusterCandidateModel(db *_gorm.DB, oldKey, newKey *[32]byte) error {
	// get count of model
	var count int64

	if err := db.Model(&models.ClusterCandidate{}).Count(&count).Error; err != nil {
		return err
	}

	// cluster-scoped repository
	repo := gorm.NewClusterRepository(db, oldKey).(*gorm.ClusterRepository)

	// iterate (count / stepSize) + 1 times using Limit and Offset
	for i := 0; i < (int(count)/stepSize)+1; i++ {
		ccs := []*models.ClusterCandidate{}

		if err := db.Order("id asc").Offset(i * stepSize).Limit(stepSize).Find(&ccs).Error; err != nil {
			return err
		}

		// decrypt with the old key
		for _, cc := range ccs {
			err := repo.DecryptClusterCandidateData(cc, oldKey)
			if err != nil {
				fmt.Printf("error decrypting cluster candidate %d\n", cc.ID)

				// in these cases we'll wipe the data -- if it can't be decrypted, we can't
				// recover it
				cc.AWSClusterIDGuess = []byte{}
				cc.Kubeconfig = []byte{}
			}
		}

		// encrypt with the new key and re-insert
		for _, cc := range ccs {
			err := repo.EncryptClusterCandidateData(cc, newKey)
			if err != nil {
				fmt.Printf("error encrypting cluster candidate %d\n", cc.ID)

				return err
			}

			if err := db.Save(cc).Error; err != nil {
				return err
			}
		}
	}

	fmt.Printf("rotated %d cluster candidates\n", count)

	return nil
}

func rotateRegistryModel(db *_gorm.DB, oldKey, newKey *[32]byte) error {
	// get count of model
	var count int64

	if err := db.Model(&models.Registry{}).Count(&count).Error; err != nil {
		return err
	}

	// registry-scoped repository
	repo := gorm.NewRegistryRepository(db, oldKey).(*gorm.RegistryRepository)

	// iterate (count / stepSize) + 1 times using Limit and Offset
	for i := 0; i < (int(count)/stepSize)+1; i++ {
		regs := []*models.Registry{}

		if err := db.Order("id asc").Offset(i * stepSize).Limit(stepSize).Preload("TokenCache").Find(&regs).Error; err != nil {
			return err
		}

		// decrypt with the old key
		for _, reg := range regs {
			err := repo.DecryptRegistryData(reg, oldKey)
			if err != nil {
				fmt.Printf("error decrypting registry %d\n", reg.ID)

				// in these cases we'll wipe the data -- if it can't be decrypted, we can't
				// recover it
				reg.TokenCache.Token = []byte{}

			}
		}

		// encrypt with the new key and re-insert
		for _, reg := range regs {
			err := repo.EncryptRegistryData(reg, newKey)
			if err != nil {
				fmt.Printf("error encrypting registry %d\n", reg.ID)

				return err
			}

			if err := db.Save(reg).Error; err != nil {
				return err
			}
		}
	}

	fmt.Printf("rotated %d registries\n", count)

	return nil
}

func rotateHelmRepoModel(db *_gorm.DB, oldKey, newKey *[32]byte) error {
	// get count of model
	var count int64

	if err := db.Model(&models.HelmRepo{}).Count(&count).Error; err != nil {
		return err
	}

	// helm repo-scoped repository
	repo := gorm.NewHelmRepoRepository(db, oldKey).(*gorm.HelmRepoRepository)

	// iterate (count / stepSize) + 1 times using Limit and Offset
	for i := 0; i < (int(count)/stepSize)+1; i++ {
		hrs := []*models.HelmRepo{}

		if err := db.Order("id asc").Offset(i * stepSize).Limit(stepSize).Preload("TokenCache").Find(&hrs).Error; err != nil {
			return err
		}

		// decrypt with the old key
		for _, hr := range hrs {
			err := repo.DecryptHelmRepoData(hr, oldKey)
			if err != nil {
				fmt.Printf("error decrypting helm repo %d\n", hr.ID)

				// in these cases we'll wipe the data -- if it can't be decrypted, we can't
				// recover it
				hr.TokenCache.Token = []byte{}
			}
		}

		// encrypt with the new key and re-insert
		for _, hr := range hrs {
			err := repo.EncryptHelmRepoData(hr, newKey)
			if err != nil {
				fmt.Printf("error encrypting helm repo %d\n", hr.ID)

				return err
			}

			if err := db.Save(hr).Error; err != nil {
				return err
			}
		}
	}

	fmt.Printf("rotated %d helm repos\n", count)

	return nil
}

func rotateInfraModel(db *_gorm.DB, oldKey, newKey *[32]byte) error {
	// get count of model
	var count int64

	if err := db.Model(&models.Infra{}).Count(&count).Error; err != nil {
		return err
	}

	// helm repo-scoped repository
	repo := gorm.NewInfraRepository(db, oldKey).(*gorm.InfraRepository)

	// iterate (count / stepSize) + 1 times using Limit and Offset
	for i := 0; i < (int(count)/stepSize)+1; i++ {
		infras := []*models.Infra{}

		if err := db.Order("id asc").Offset(i * stepSize).Limit(stepSize).Find(&infras).Error; err != nil {
			return err
		}

		// decrypt with the old key
		for _, infra := range infras {
			err := repo.DecryptInfraData(infra, oldKey)
			if err != nil {
				oldKeyBytes := make([]byte, 32)
				newKeyBytes := make([]byte, 32)

				copy(oldKeyBytes[:], oldKey[:])
				copy(newKeyBytes[:], newKey[:])

				fmt.Printf("error decrypting infra %d, %s, %s, %s\n", infra.ID, hex.EncodeToString(infra.LastApplied), string(oldKeyBytes), string(newKeyBytes))

				// in these cases we'll wipe the data -- if it can't be decrypted, we can't
				// recover it
				infra.LastApplied = []byte{}
			}
		}

		// encrypt with the new key and re-insert
		for _, infra := range infras {
			err := repo.EncryptInfraData(infra, newKey)
			if err != nil {
				fmt.Printf("error encrypting infra %d\n", infra.ID)

				return err
			}

			if err := db.Save(infra).Error; err != nil {
				return err
			}
		}
	}

	fmt.Printf("rotated %d infras\n", count)

	return nil
}

func rotateKubeIntegrationModel(db *_gorm.DB, oldKey, newKey *[32]byte) error {
	// get count of model
	var count int64

	if err := db.Model(&ints.KubeIntegration{}).Count(&count).Error; err != nil {
		return err
	}

	// cluster-scoped repository
	repo := gorm.NewKubeIntegrationRepository(db, oldKey).(*gorm.KubeIntegrationRepository)

	// iterate (count / stepSize) + 1 times using Limit and Offset
	for i := 0; i < (int(count)/stepSize)+1; i++ {
		kis := []*ints.KubeIntegration{}

		if err := db.Order("id asc").Offset(i * stepSize).Limit(stepSize).Find(&kis).Error; err != nil {
			return err
		}

		// decrypt with the old key
		for _, ki := range kis {
			err := repo.DecryptKubeIntegrationData(ki, oldKey)
			if err != nil {
				fmt.Printf("error decrypting kube integration %d\n", ki.ID)

				// in these cases we'll wipe the data -- if it can't be decrypted, we can't
				// recover it
				ki.ClientCertificateData = []byte{}
				ki.ClientKeyData = []byte{}
				ki.Token = []byte{}
				ki.Username = []byte{}
				ki.Password = []byte{}
				ki.Kubeconfig = []byte{}
			}
		}

		// encrypt with the new key and re-insert
		for _, ki := range kis {
			err := repo.EncryptKubeIntegrationData(ki, newKey)
			if err != nil {
				fmt.Printf("error encrypting kube integration %d\n", ki.ID)

				return err
			}

			if err := db.Save(ki).Error; err != nil {
				return err
			}
		}
	}

	fmt.Printf("rotated %d kube integrations\n", count)

	return nil
}

func rotateBasicIntegrationModel(db *_gorm.DB, oldKey, newKey *[32]byte) error {
	// get count of model
	var count int64

	if err := db.Model(&ints.BasicIntegration{}).Count(&count).Error; err != nil {
		return err
	}

	// cluster-scoped repository
	repo := gorm.NewBasicIntegrationRepository(db, oldKey).(*gorm.BasicIntegrationRepository)

	// iterate (count / stepSize) + 1 times using Limit and Offset
	for i := 0; i < (int(count)/stepSize)+1; i++ {
		basics := []*ints.BasicIntegration{}

		if err := db.Order("id asc").Offset(i * stepSize).Limit(stepSize).Find(&basics).Error; err != nil {
			return err
		}

		// decrypt with the old key
		for _, basic := range basics {
			err := repo.DecryptBasicIntegrationData(basic, oldKey)
			if err != nil {
				fmt.Printf("error decrypting basic integration %d\n", basic.ID)

				// in these cases we'll wipe the data -- if it can't be decrypted, we can't
				// recover it
				basic.Username = []byte{}
				basic.Password = []byte{}
			}
		}

		// encrypt with the new key and re-insert
		for _, basic := range basics {
			err := repo.EncryptBasicIntegrationData(basic, newKey)
			if err != nil {
				fmt.Printf("error encrypting basic integration %d\n", basic.ID)

				return err
			}

			if err := db.Save(basic).Error; err != nil {
				return err
			}
		}
	}

	fmt.Printf("rotated %d basic integrations\n", count)

	return nil
}

func rotateOIDCIntegrationModel(db *_gorm.DB, oldKey, newKey *[32]byte) error {
	// get count of model
	var count int64

	if err := db.Model(&ints.OIDCIntegration{}).Count(&count).Error; err != nil {
		return err
	}

	// cluster-scoped repository
	repo := gorm.NewOIDCIntegrationRepository(db, oldKey).(*gorm.OIDCIntegrationRepository)

	// iterate (count / stepSize) + 1 times using Limit and Offset
	for i := 0; i < (int(count)/stepSize)+1; i++ {
		oidcs := []*ints.OIDCIntegration{}

		if err := db.Order("id asc").Offset(i * stepSize).Limit(stepSize).Find(&oidcs).Error; err != nil {
			return err
		}

		// decrypt with the old key
		for _, oidc := range oidcs {
			err := repo.DecryptOIDCIntegrationData(oidc, oldKey)
			if err != nil {
				fmt.Printf("error decrypting oidc integration %d\n", oidc.ID)

				// in these cases we'll wipe the data -- if it can't be decrypted, we can't
				// recover it
				oidc.IssuerURL = []byte{}
				oidc.ClientID = []byte{}
				oidc.ClientSecret = []byte{}
				oidc.CertificateAuthorityData = []byte{}
				oidc.IDToken = []byte{}
				oidc.RefreshToken = []byte{}
			}
		}

		// encrypt with the new key and re-insert
		for _, oidc := range oidcs {
			err := repo.EncryptOIDCIntegrationData(oidc, newKey)
			if err != nil {
				fmt.Printf("error encrypting oidc integration %d\n", oidc.ID)

				return err
			}

			if err := db.Save(oidc).Error; err != nil {
				return err
			}
		}
	}

	fmt.Printf("rotated %d oidc integrations\n", count)

	return nil
}

func rotateOAuthIntegrationModel(db *_gorm.DB, oldKey, newKey *[32]byte) error {
	// get count of model
	var count int64

	if err := db.Model(&ints.OAuthIntegration{}).Count(&count).Error; err != nil {
		return err
	}

	// cluster-scoped repository
	repo := gorm.NewOAuthIntegrationRepository(db, oldKey, nil).(*gorm.OAuthIntegrationRepository)

	// iterate (count / stepSize) + 1 times using Limit and Offset
	for i := 0; i < (int(count)/stepSize)+1; i++ {
		oauths := []*ints.OAuthIntegration{}

		if err := db.Order("id asc").Offset(i * stepSize).Limit(stepSize).Find(&oauths).Error; err != nil {
			return err
		}

		// decrypt with the old key
		for _, oauth := range oauths {
			err := repo.DecryptOAuthIntegrationData(oauth, oldKey)
			if err != nil {
				fmt.Printf("error decrypting oauth integration %d\n", oauth.ID)

				// in these cases we'll wipe the data -- if it can't be decrypted, we can't
				// recover it
				oauth.ClientID = []byte{}
				oauth.AccessToken = []byte{}
				oauth.RefreshToken = []byte{}
			}
		}

		// encrypt with the new key and re-insert
		for _, oauth := range oauths {
			err := repo.EncryptOAuthIntegrationData(oauth, newKey)
			if err != nil {
				fmt.Printf("error encrypting oauth integration %d\n", oauth.ID)

				return err
			}

			if err := db.Save(oauth).Error; err != nil {
				return err
			}
		}
	}

	fmt.Printf("rotated %d oauth integrations\n", count)

	return nil
}

func rotateGCPIntegrationModel(db *_gorm.DB, oldKey, newKey *[32]byte) error {
	// get count of model
	var count int64

	if err := db.Model(&ints.GCPIntegration{}).Count(&count).Error; err != nil {
		return err
	}

	// cluster-scoped repository
	repo := gorm.NewGCPIntegrationRepository(db, oldKey, nil).(*gorm.GCPIntegrationRepository)

	// iterate (count / stepSize) + 1 times using Limit and Offset
	for i := 0; i < (int(count)/stepSize)+1; i++ {
		gcps := []*ints.GCPIntegration{}

		if err := db.Order("id asc").Offset(i * stepSize).Limit(stepSize).Find(&gcps).Error; err != nil {
			return err
		}

		// decrypt with the old key
		for _, gcp := range gcps {
			err := repo.DecryptGCPIntegrationData(gcp, oldKey)
			if err != nil {
				fmt.Printf("error decrypting gcp integration %d\n", gcp.ID)

				// in these cases we'll wipe the data -- if it can't be decrypted, we can't
				// recover it
				gcp.GCPKeyData = []byte{}
			}
		}

		// encrypt with the new key and re-insert
		for _, gcp := range gcps {
			err := repo.EncryptGCPIntegrationData(gcp, newKey)
			if err != nil {
				fmt.Printf("error encrypting gcp integration %d\n", gcp.ID)

				return err
			}

			if err := db.Save(gcp).Error; err != nil {
				return err
			}
		}
	}

	fmt.Printf("rotated %d gcp integrations\n", count)

	return nil
}

func rotateAWSIntegrationModel(db *_gorm.DB, oldKey, newKey *[32]byte) error {
	// get count of model
	var count int64

	if err := db.Model(&ints.AWSIntegration{}).Count(&count).Error; err != nil {
		return err
	}

	// cluster-scoped repository
	repo := gorm.NewAWSIntegrationRepository(db, oldKey, nil).(*gorm.AWSIntegrationRepository)

	// iterate (count / stepSize) + 1 times using Limit and Offset
	for i := 0; i < (int(count)/stepSize)+1; i++ {
		awss := []*ints.AWSIntegration{}

		if err := db.Order("id asc").Offset(i * stepSize).Limit(stepSize).Find(&awss).Error; err != nil {
			return err
		}

		// decrypt with the old key
		for _, aws := range awss {
			err := repo.DecryptAWSIntegrationData(aws, oldKey)
			if err != nil {
				fmt.Printf("error encrypting aws integration %d\n", aws.ID)

				// in these cases we'll wipe the data -- if it can't be decrypted, we can't
				// recover it
				aws.AWSAccessKeyID = []byte{}
				aws.AWSClusterID = []byte{}
				aws.AWSSecretAccessKey = []byte{}
				aws.AWSSessionToken = []byte{}
			}
		}

		// encrypt with the new key and re-insert
		for _, aws := range awss {
			err := repo.EncryptAWSIntegrationData(aws, newKey)
			if err != nil {
				fmt.Printf("error decrypting aws integration %d\n", aws.ID)

				return err
			}

			if err := db.Save(aws).Error; err != nil {
				return err
			}
		}
	}

	fmt.Printf("rotated %d aws integrations\n", count)

	return nil
}