// Package intentstream defines the frozen Redis Stream contract used for
// Notification Service intent intake.
package intentstream

import (
	"strings"

	"galaxy/notification/internal/service/malformedintent"
	"galaxy/notificationintent"
)

const (
	fieldNotificationType = "notification_type"
	fieldProducer         = "producer"
	fieldAudienceKind     = "audience_kind"
	fieldRecipientUserIDs = "recipient_user_ids_json"
	fieldIdempotencyKey   = "idempotency_key"
	fieldOccurredAtMS     = "occurred_at_ms"
	fieldRequestID        = "request_id"
	fieldTraceID          = "trace_id"
	fieldPayloadJSON      = "payload_json"
	defaultResolvedLocale = "en"
)

// NotificationType identifies one supported normalized notification type.
type NotificationType = notificationintent.NotificationType

const (
	// NotificationTypeGeoReviewRecommended identifies the
	// `geo.review_recommended` notification.
	NotificationTypeGeoReviewRecommended = notificationintent.NotificationTypeGeoReviewRecommended

	// NotificationTypeGameTurnReady identifies the `game.turn.ready`
	// notification.
	NotificationTypeGameTurnReady = notificationintent.NotificationTypeGameTurnReady

	// NotificationTypeGameFinished identifies the `game.finished`
	// notification.
	NotificationTypeGameFinished = notificationintent.NotificationTypeGameFinished

	// NotificationTypeGameGenerationFailed identifies the
	// `game.generation_failed` notification.
	NotificationTypeGameGenerationFailed = notificationintent.NotificationTypeGameGenerationFailed

	// NotificationTypeLobbyRuntimePausedAfterStart identifies the
	// `lobby.runtime_paused_after_start` notification.
	NotificationTypeLobbyRuntimePausedAfterStart = notificationintent.NotificationTypeLobbyRuntimePausedAfterStart

	// NotificationTypeLobbyApplicationSubmitted identifies the
	// `lobby.application.submitted` notification.
	NotificationTypeLobbyApplicationSubmitted = notificationintent.NotificationTypeLobbyApplicationSubmitted

	// NotificationTypeLobbyMembershipApproved identifies the
	// `lobby.membership.approved` notification.
	NotificationTypeLobbyMembershipApproved = notificationintent.NotificationTypeLobbyMembershipApproved

	// NotificationTypeLobbyMembershipRejected identifies the
	// `lobby.membership.rejected` notification.
	NotificationTypeLobbyMembershipRejected = notificationintent.NotificationTypeLobbyMembershipRejected

	// NotificationTypeLobbyInviteCreated identifies the
	// `lobby.invite.created` notification.
	NotificationTypeLobbyInviteCreated = notificationintent.NotificationTypeLobbyInviteCreated

	// NotificationTypeLobbyInviteRedeemed identifies the
	// `lobby.invite.redeemed` notification.
	NotificationTypeLobbyInviteRedeemed = notificationintent.NotificationTypeLobbyInviteRedeemed

	// NotificationTypeLobbyInviteExpired identifies the
	// `lobby.invite.expired` notification.
	NotificationTypeLobbyInviteExpired = notificationintent.NotificationTypeLobbyInviteExpired
)

// Producer identifies one supported upstream producer.
type Producer = notificationintent.Producer

const (
	// ProducerGeoProfile identifies Geo Profile Service.
	ProducerGeoProfile = notificationintent.ProducerGeoProfile

	// ProducerGameMaster identifies Game Master.
	ProducerGameMaster = notificationintent.ProducerGameMaster

	// ProducerGameLobby identifies Game Lobby.
	ProducerGameLobby = notificationintent.ProducerGameLobby
)

// AudienceKind identifies one supported target-audience kind.
type AudienceKind = notificationintent.AudienceKind

const (
	// AudienceKindUser identifies user-targeted notifications.
	AudienceKindUser = notificationintent.AudienceKindUser

	// AudienceKindAdminEmail identifies administrator-email notifications.
	AudienceKindAdminEmail = notificationintent.AudienceKindAdminEmail
)

// Channel identifies one durable notification-delivery channel slot.
type Channel = notificationintent.Channel

const (
	// ChannelPush identifies the push-delivery channel.
	ChannelPush = notificationintent.ChannelPush

	// ChannelEmail identifies the email-delivery channel.
	ChannelEmail = notificationintent.ChannelEmail
)

// Intent stores one normalized notification intent accepted from the Redis
// Stream ingress contract.
type Intent = notificationintent.Intent

// DecodeIntent validates one raw Redis Stream entry and returns the normalized
// notification intent frozen by the shared producer contract.
func DecodeIntent(fields map[string]any) (Intent, error) {
	return notificationintent.DecodeIntent(fields)
}

// ClassifyDecodeError maps one intake decoding or validation error to the
// stable malformed-intent failure surface.
func ClassifyDecodeError(err error) malformedintent.FailureCode {
	if err == nil {
		return malformedintent.FailureCodeInvalidIntent
	}

	message := err.Error()
	switch {
	case strings.Contains(message, "payload_json"),
		strings.Contains(message, "turn_number"),
		strings.Contains(message, "final_turn_number"),
		strings.Contains(message, "failure_reason"),
		strings.Contains(message, "applicant_name"),
		strings.Contains(message, "inviter_name"),
		strings.Contains(message, "invitee_name"),
		strings.Contains(message, "review_reason"):
		return malformedintent.FailureCodeInvalidPayload
	default:
		return malformedintent.FailureCodeInvalidIntent
	}
}

// DefaultResolvedLocale returns the frozen fallback locale assigned when the
// current rollout has no supported exact user locale other than English.
func DefaultResolvedLocale() string {
	return defaultResolvedLocale
}