package edgesfile

import (
	"encoding/json"
	"testing"
)

// Region HA spec 2 §7: the placement policy reads the headroom totals and
// the file's generation, so BoxChoice carries both.
func TestBoxChoiceCarriesHeadroomTotalsAndGeneration(t *testing.T) {
	var f PlacementView
	body := `{"v":1,"box":"box-a","box_id":"i-a","generation":"2026-10-16T11:55:00Z","headroom":{"mem_free_mib":512,"disk_free_mib":2048,"mem_total_mib":4096,"disk_total_mib":20480,"awake":3},"hosts":{}}`
	if err := json.Unmarshal([]byte(body), &f); err != nil {
		t.Fatal(err)
	}
	f.Fresh = true
	got := Snapshot{Files: []PlacementView{f}, Complete: true, BoxesComplete: true}.BoxChoice()
	if len(got.Boxes) != 1 {
		t.Fatalf("boxes %+v", got.Boxes)
	}
	b := got.Boxes[0]
	if b.Generation != "2026-10-16T11:55:00Z" || b.Headroom == nil || b.Headroom.MemTotalMiB != 4096 || b.Headroom.DiskTotalMiB != 20480 || b.Headroom.MemFreeMiB != 512 || b.Headroom.DiskFreeMiB != 2048 || b.Headroom.Awake != 3 {
		t.Fatalf("box lost a field: %+v %+v", b, b.Headroom)
	}
}