// Package runtime composes the locally owned Sendico durable messaging adapters.
// SXCHNGE does not include Sendico's discovery or business-event registries.
package runtime

import (
	merrors "git.sendico.io/tech/sxchnge/shared/errors"
	mlogger "git.sendico.io/tech/sxchnge/shared/logging"
	msg "git.sendico.io/tech/sxchnge/shared/messaging"
	"git.sendico.io/tech/sxchnge/shared/messaging/internal/natsb"
	config "git.sendico.io/tech/sxchnge/shared/messaging/internal/natsb/config"
	"git.sendico.io/tech/sxchnge/shared/messaging/internal/natscap"
	"git.sendico.io/tech/sxchnge/shared/messaging/reliable"
	"github.com/go-viper/mapstructure/v2"
)

type Runtime struct {
	Durable      reliable.Transport
	DurableAdmin reliable.Admin
	broker       *natsb.NatsBroker
}

func New(logger mlogger.Logger, c *msg.Config) (*Runtime, error) {
	if c == nil || c.Driver != msg.BBNats {
		return nil, merrors.InvalidArgument("NATS messaging configuration required")
	}
	var settings config.Settings
	decoder, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{Result: &settings, ErrorUnused: true, TagName: "mapstructure"})
	if err != nil {
		return nil, merrors.InternalWrap(err, "create messaging settings decoder")
	}
	if err = decoder.Decode(c.Settings); err != nil {
		return nil, merrors.InvalidArgument("invalid messaging settings")
	}
	broker, err := natsb.NewNatsBroker(mlogger.Named(logger, "messaging"), &settings)
	if err != nil {
		return nil, merrors.OpaqueWrap(merrors.ErrServiceUnavailable, err, "connect messaging broker")
	}
	adapter := natscap.NewDurableAdapter(broker)
	if adapter == nil {
		broker.Close()
		return nil, merrors.FailedPrecondition("durable messaging unavailable")
	}
	return &Runtime{Durable: adapter, DurableAdmin: adapter, broker: broker}, nil
}
func (r *Runtime) Close() {
	if r != nil {
		r.broker.Close()
	}
}