package main

import (
	"encoding/json"
	"strings"
	"testing"

	"git.novox.be/novox/mesh-sdk/go/delivery"
)

// A composition that names a file the provisioner fills without saying it is filled would have this node-engine write
// that file empty: its apply is refused, loudly, before anything is written (issue 1945, live on 2026-10-25 at 01:22,
// when ace, g14 and shanks wrote claude-code's, node-env's and power's files empty).
func TestAFileItCannotProduceIsNeverWrittenEmpty(t *testing.T) {
	unit := json.RawMessage(`{"id":"power.after-boot-unit","type":"file","path":"/etc/systemd/system/mesh-power-after-boot.service","mode":"0644","owner-at-runtime":"owned"}`)
	c := delivery.Composed{Node: "ace", Resources: []json.RawMessage{unit}}
	d, err := declarationOf(c)
	if err != nil {
		t.Fatal(err)
	}
	if err := refuseEmptyWrites(d); err == nil || !strings.Contains(err.Error(), "power.after-boot-unit") {
		t.Fatalf("a file the provisioner fills, not filled here: %v", err)
	}
	c.Filled = []string{"/etc/systemd/system/mesh-power-after-boot.service"}
	if d, _ = declarationOf(c); refuseEmptyWrites(d) != nil {
		t.Fatalf("a filled file was refused: %v", refuseEmptyWrites(d))
	}
	plain := delivery.Composed{Node: "ace", Resources: []json.RawMessage{json.RawMessage(
		`{"id":"x.f","type":"file","path":"/etc/x","mode":"0644","content":"x"}`)}}
	if d, _ = declarationOf(plain); refuseEmptyWrites(d) != nil {
		t.Fatalf("a file with its content was refused: %v", refuseEmptyWrites(d))
	}
}