package blobstor

import (
	"context"
	"fmt"
	"time"

	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/object"
	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/common"
	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/util/logicerr"
	"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
	"go.opentelemetry.io/otel/attribute"
	"go.opentelemetry.io/otel/trace"
)

// ErrNoPlaceFound is returned when object can't be saved to any sub-storage component
// because of the policy.
var ErrNoPlaceFound = logicerr.New("couldn't find a place to store an object")

// Put saves the object in BLOB storage.
//
// If object is "big", BlobStor saves the object in shallow dir.
// Otherwise, BlobStor saves the object in blobonicza. In this
// case the identifier of blobovnicza is returned.
//
// Returns any error encountered that
// did not allow to completely save the object.
func (b *BlobStor) Put(ctx context.Context, prm common.PutPrm) (common.PutRes, error) {
	var (
		startedAt = time.Now()
		success   = false
		size      = 0
	)
	defer func() {
		b.metrics.Put(time.Since(startedAt), size, success)
	}()

	ctx, span := tracing.StartSpanFromContext(ctx, "BlobStor.Put",
		trace.WithAttributes(
			attribute.String("address", prm.Address.EncodeToString()),
			attribute.Bool("dont_compress", prm.DontCompress),
		))
	defer span.End()

	b.modeMtx.RLock()
	defer b.modeMtx.RUnlock()

	if prm.Object != nil {
		prm.Address = object.AddressOf(prm.Object)
	}
	if prm.RawData == nil {
		// marshal object
		data, err := prm.Object.Marshal()
		if err != nil {
			return common.PutRes{}, fmt.Errorf("could not marshal the object: %w", err)
		}
		prm.RawData = data
	}
	size = len(prm.RawData)

	for i := range b.storage {
		if b.storage[i].Policy == nil || b.storage[i].Policy(prm.Object, prm.RawData) {
			res, err := b.storage[i].Storage.Put(ctx, prm)
			if err == nil {
				success = true
				logOp(ctx, b.log, putOp, prm.Address, b.storage[i].Storage.Type(), res.StorageID)
			}
			return res, err
		}
	}

	return common.PutRes{}, ErrNoPlaceFound
}