package inventory

import (
	"context"
	"testing"

	"github.com/novox/mesh-controller/internal/chain"
)

// The first read of a chain that requires the layout lays the builds out itself when it may write, instead of refusing
// the controller's own start (issue 1121, 2026-10-18: the controller exited every five seconds).
func TestTheFirstReadOfAChainNotLaidOutLaysItOut(t *testing.T) {
	ctx := context.Background()
	inv, c := anInventoryOnTheChain(t)
	inv.RequireLayout()
	if _, found, _ := c.Builds.GetRaw(ctx, chain.LayoutMarkerKey); found {
		t.Fatal("a fresh chain holds the marker already; the test proves nothing")
	}
	if _, err := inv.theChain(ctx); err != nil {
		t.Fatalf("the first read was refused: %v", err)
	}
	if _, found, err := c.Builds.GetRaw(ctx, chain.LayoutMarkerKey); err != nil || !found {
		t.Fatalf("the read did not lay the builds out: found %v, %v", found, err)
	}
}

// anInventoryOnTheChain is an inventory with no store and a chain in memory: the chain's own paths, which never reach the
// store.
func anInventoryOnTheChain(t *testing.T) (*Inventory, *chain.Chain) {
	t.Helper()
	c := chain.InMemory(nil)
	inv := &Inventory{state: &chainState{}}
	inv.UseChain(c)
	return inv, c
}