package builder

import (
	"os"
	"path/filepath"
	"strings"
	"testing"
)

// 1826/AC2: the held values are written whole to held.json, and the gate is given the flag only when there are some.
func TestHeldValuesAreWrittenForTheGateAndNoneWriteNothing(t *testing.T) {
	root := t.TempDir()
	if file, err := writeHeld(root, nil); err != nil || file != "" {
		t.Fatalf("none wrote %q %v", file, err)
	}
	if _, err := os.Stat(filepath.Join(root, "held.json")); err == nil {
		t.Fatal("none wrote a file")
	}
	file, err := writeHeld(root, []HeldValue{{Pull: "novox/mesh-catalog#434", Node: "ace", Module: "n8n", Key: "media-gid",
		Value: []byte("2000"), Approved: "the operator"}})
	if err != nil || file != filepath.Join(root, "held.json") {
		t.Fatalf("wrote %q %v", file, err)
	}
	raw, _ := os.ReadFile(file)
	for _, want := range []string{`"node":"ace"`, `"module":"n8n"`, `"key":"media-gid"`, `"value":2000`} {
		if !strings.Contains(string(raw), want) {
			t.Fatalf("%s lacks %s", raw, want)
		}
	}
	if !strings.Contains(heldFlag, `--held "$MESH_CHECK_HELD"`) || !strings.HasPrefix(heldFlag, "${MESH_CHECK_HELD:+") {
		t.Fatalf("the flag is %s", heldFlag)
	}
}