// Copyright © 2023 Ory Corp
// SPDX-License-Identifier: Apache-2.0

package identity

import (
	"fmt"
	"slices"
	"time"

	"github.com/gofrs/uuid"

	"github.com/ory/x/sqlxx"
)

const (
	VerifiableAddressStatusPending   VerifiableAddressStatus = "pending"
	VerifiableAddressStatusSent      VerifiableAddressStatus = "sent"
	VerifiableAddressStatusCompleted VerifiableAddressStatus = "completed"
)

// VerifiableAddressStatus must not exceed 16 characters as that is the limitation in the SQL Schema
//
// swagger:model identityVerifiableAddressStatus
type VerifiableAddressStatus string

// VerifiableAddress is an identity's verifiable address
//
// swagger:model verifiableIdentityAddress
type VerifiableAddress struct {
	// The ID
	//
	ID uuid.UUID `json:"id" db:"id" faker:"-"`

	// The address value
	//
	// example foo@user.com
	// required: true
	Value string `json:"value" db:"value"`

	// Indicates if the address has already been verified
	//
	// example: true
	// required: true
	Verified bool `json:"verified" db:"verified"`

	// The delivery method
	//
	// enum: email,sms
	// example: email
	// required: true
	Via string `json:"via" db:"via"`

	// The verified address status
	//
	// enum: pending,sent,completed
	// example: sent
	// required: true
	Status VerifiableAddressStatus `json:"status" db:"status"`

	// When the address was verified
	//
	// example: 2014-01-01T23:28:56.782Z
	// required: false
	VerifiedAt *sqlxx.NullTime `json:"verified_at,omitempty" faker:"-" db:"verified_at"`

	// When this entry was created
	//
	// example: 2014-01-01T23:28:56.782Z
	CreatedAt time.Time `json:"created_at" faker:"-" db:"created_at"`

	// When this entry was last updated
	//
	// example: 2014-01-01T23:28:56.782Z
	UpdatedAt time.Time `json:"updated_at" faker:"-" db:"updated_at"`

	// IdentityID is a helper struct field for gobuffalo.pop.
	IdentityID uuid.UUID `json:"-" faker:"-" db:"identity_id"`
	NID        uuid.UUID `json:"-"  faker:"-" db:"nid"`
}

func (a VerifiableAddress) TableName() string {
	return "identity_verifiable_addresses"
}

func NewVerifiableEmailAddress(value string, identity uuid.UUID) *VerifiableAddress {
	return NewVerifiableAddress(value, identity, AddressTypeEmail)
}

func NewVerifiableAddress(value string, identity uuid.UUID, channel string) *VerifiableAddress {
	return &VerifiableAddress{
		Value:      value,
		Verified:   false,
		Status:     VerifiableAddressStatusPending,
		Via:        channel,
		IdentityID: identity,
	}
}

func (a VerifiableAddress) GetID() uuid.UUID {
	return a.ID
}

// Signature returns a unique string representation for the recovery address.
func (a VerifiableAddress) Signature() string {
	return fmt.Sprintf("%v|%v|%v|%v|%v|%v|%v", a.Value, a.Verified, a.Via, a.Status, a.VerifiedAt, a.IdentityID, a.NID)
}

func VerifiableAddressesEqual(original, updated []VerifiableAddress) bool {
	return slices.EqualFunc(original, updated, func(a, b VerifiableAddress) bool {
		return a.Signature() == b.Signature()
	})
}

type VerifiableAddressLike interface {
	// ToPersistable returns the verifiable address to be persisted.
	// Returns nil when the change is pending (e.g., via PendingTraitsChange).
	ToPersistable() (va *VerifiableAddress, isPersistable bool)
	// Address returns the address value
	Address() string
	// Via returns the delivery method
	DeliveryVia() string
}

var _ VerifiableAddressLike = &VerifiableAddress{}

func (va *VerifiableAddress) ToPersistable() (*VerifiableAddress, bool) {
	return va, true
}

func (va VerifiableAddress) Address() string {
	return va.Value
}

func (va VerifiableAddress) DeliveryVia() string {
	return va.Via
}