package writecache

import (
	"context"
	"fmt"

	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/pkg/tracing"
	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/shard/mode"
)

// Init runs necessary services.
func (c *Cache) Init() error {
	ctx, span := tracing.StartSpanFromContext(context.TODO(), "writecache.Init")
	defer span.End()

	c.modeMtx.Lock()
	defer c.modeMtx.Unlock()

	if c.mode.NoMetabase() {
		return nil
	}

	err := c.initCounters(ctx)
	if err != nil {
		return fmt.Errorf("initializing write-cache size: %w", err)
	}

	if c.mode == mode.ReadWrite {
		c.workersChan = make(chan struct{})
		c.runFlushLoop()
	}

	return nil
}