package main

type nodeStore map[int]*simNode

func linkNodes(a *simNode, b *simNode) {
	la := a.core.NewSimlink()
	lb := b.core.NewSimlink()
	if err := la.SetDestination(lb); err != nil {
		panic(err)
	}
	if err := lb.SetDestination(la); err != nil {
		panic(err)
	}
	if err := la.Start(); err != nil {
		panic(err)
	}
	if err := lb.Start(); err != nil {
		panic(err)
	}
}

func makeStoreSquareGrid(sideLength int) nodeStore {
	store := make(nodeStore)
	nNodes := sideLength * sideLength
	idxs := make([]int, 0, nNodes)
	// TODO shuffle nodeIDs
	for idx := 1; idx <= nNodes; idx++ {
		idxs = append(idxs, idx)
	}
	for _, idx := range idxs {
		n := newNode(idx)
		store[idx] = n
	}
	for idx := 0; idx < nNodes; idx++ {
		if (idx % sideLength) != 0 {
			linkNodes(store[idxs[idx]], store[idxs[idx-1]])
		}
		if idx >= sideLength {
			linkNodes(store[idxs[idx]], store[idxs[idx-sideLength]])
		}
	}
	return store
}