package command

import (
	"context"
	global_model "github.com/caos/zitadel/internal/model"
	webauthn_helper "github.com/caos/zitadel/internal/webauthn"

	sd "github.com/caos/zitadel/internal/config/systemdefaults"
	"github.com/caos/zitadel/internal/crypto"
	"github.com/caos/zitadel/internal/eventstore/v2"
	"github.com/caos/zitadel/internal/id"
	"github.com/caos/zitadel/internal/telemetry/tracing"
	iam_repo "github.com/caos/zitadel/internal/v2/repository/iam"
	usr_repo "github.com/caos/zitadel/internal/v2/repository/user"
)

type CommandSide struct {
	eventstore  *eventstore.Eventstore
	idGenerator id.Generator
	iamDomain   string

	idpConfigSecretCrypto crypto.Crypto

	userPasswordAlg          crypto.HashAlgorithm
	initializeUserCode       crypto.Generator
	emailVerificationCode    crypto.Generator
	phoneVerificationCode    crypto.Generator
	passwordVerificationCode crypto.Generator
	machineKeyAlg            crypto.EncryptionAlgorithm
	machineKeySize           int
	//TODO: remove global model, or move to domain
	multifactors               global_model.Multifactors
	applicationSecretGenerator crypto.Generator

	webauthn *webauthn_helper.WebAuthN
}

type Config struct {
	Eventstore     *eventstore.Eventstore
	SystemDefaults sd.SystemDefaults
}

func StartCommandSide(config *Config) (repo *CommandSide, err error) {
	repo = &CommandSide{
		eventstore:  config.Eventstore,
		idGenerator: id.SonyFlakeGenerator,
		iamDomain:   config.SystemDefaults.Domain,
	}
	iam_repo.RegisterEventMappers(repo.eventstore)
	usr_repo.RegisterEventMappers(repo.eventstore)

	//TODO: simplify!!!!
	repo.idpConfigSecretCrypto, err = crypto.NewAESCrypto(config.SystemDefaults.IDPConfigVerificationKey)
	if err != nil {
		return nil, err
	}
	userEncryptionAlgorithm, err := crypto.NewAESCrypto(config.SystemDefaults.UserVerificationKey)
	if err != nil {
		return nil, err
	}
	repo.initializeUserCode = crypto.NewEncryptionGenerator(config.SystemDefaults.SecretGenerators.InitializeUserCode, userEncryptionAlgorithm)
	repo.emailVerificationCode = crypto.NewEncryptionGenerator(config.SystemDefaults.SecretGenerators.EmailVerificationCode, userEncryptionAlgorithm)
	repo.phoneVerificationCode = crypto.NewEncryptionGenerator(config.SystemDefaults.SecretGenerators.PhoneVerificationCode, userEncryptionAlgorithm)
	repo.passwordVerificationCode = crypto.NewEncryptionGenerator(config.SystemDefaults.SecretGenerators.PasswordVerificationCode, userEncryptionAlgorithm)
	repo.userPasswordAlg = crypto.NewBCrypt(config.SystemDefaults.SecretGenerators.PasswordSaltCost)
	repo.machineKeyAlg = userEncryptionAlgorithm
	repo.machineKeySize = int(config.SystemDefaults.SecretGenerators.MachineKeySize)

	aesOTPCrypto, err := crypto.NewAESCrypto(config.SystemDefaults.Multifactors.OTP.VerificationKey)
	if err != nil {
		return nil, err
	}
	repo.multifactors = global_model.Multifactors{
		OTP: global_model.OTP{
			CryptoMFA: aesOTPCrypto,
			Issuer:    config.SystemDefaults.Multifactors.OTP.Issuer,
		},
	}
	passwordAlg := crypto.NewBCrypt(config.SystemDefaults.SecretGenerators.PasswordSaltCost)
	repo.applicationSecretGenerator = crypto.NewHashGenerator(config.SystemDefaults.SecretGenerators.ClientSecretGenerator, passwordAlg)
	web, err := webauthn_helper.StartServer(config.SystemDefaults.WebAuthN)
	if err != nil {
		return nil, err
	}
	repo.webauthn = web
	return repo, nil
}

func (r *CommandSide) getIAMWriteModel(ctx context.Context) (_ *IAMWriteModel, err error) {
	ctx, span := tracing.NewSpan(ctx)
	defer func() { span.EndWithError(err) }()

	writeModel := NewIAMWriteModel()
	err = r.eventstore.FilterToQueryReducer(ctx, writeModel)
	if err != nil {
		return nil, err
	}

	return writeModel, nil
}