package main

import (
	"testing"

	"git.k6n.net/mats/platform/catalog"
)

// mustCache opens a per-pod projection cache backed by a temp dir (pod-local).
func mustCache(t *testing.T) *catalogProjectionCache {
	t.Helper()
	c, err := newCatalogProjectionCache(t.TempDir())
	if err != nil {
		t.Fatalf("newCatalogProjectionCache: %v", err)
	}
	t.Cleanup(func() { _ = c.store.Close() })
	return c
}

// Apply is a TEST-ONLY convenience that routes a delta batch through the store at
// the initial epoch (0), reproducing the pre-ProjectionStore cache API so the
// existing cart tests keep exercising Get/IsDeleted/Len. Production code feeds the
// store via HandleFrame with real bus framing (snapshot + epoch-stamped deltas).
func (c *catalogProjectionCache) Apply(updates []catalog.ProjectionUpdate) (upserts, deletes int) {
	for _, u := range updates {
		if u.Deleted {
			deletes++
		} else if u.SKU != "" {
			upserts++
		}
	}
	payload, err := catalog.EncodeUpdates(updates)
	if err != nil {
		return 0, 0
	}
	// No MetaSnapshotPhase ⇒ delta; epoch 0 matches a fresh store's base epoch.
	_ = c.store.HandleFrame(map[string]string{catalog.MetaEpoch: "0"}, payload)
	return upserts, deletes
}