package e2e

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

// TestSyncDefaultBranchStaysFresh pins the fix for the stale-cache bug: with
// no ref configured, sync must resolve the default branch from the remote
// advertisement, never from the cached bare clone's frozen refs/heads ref.
func TestSyncDefaultBranchStaysFresh(t *testing.T) {
	h := newHarness(t)
	env := newSyncEnv(t, h)
	buildWorkRepo(t, h, env.workRepo)

	// config without "ref": the default-branch resolution path
	env.config = filepath.Join(env.configDir, "config.json")
	os.WriteFile(env.config, []byte(`{"repo_url": "`+env.workRepo+`"}`), 0o600)

	if _, err := env.run(t); err != nil {
		t.Fatal(err)
	}

	// upstream change on the default branch
	p := filepath.Join(env.workRepo, "commands/deploy.md")
	os.WriteFile(p, []byte("---\nname: Deploy\ndescription: updated\n---\nfresh body\n"), 0o644)
	h.git(t, env.workRepo, "add", "-A")
	h.git(t, env.workRepo, "commit", "-m", "update command on default branch")

	out, err := env.run(t)
	if err != nil {
		t.Fatalf("second sync (default branch) failed: %v\n%s", err, out)
	}
	if !contains(out, "updated:  1") {
		t.Errorf("default-branch sync must pick up the upstream change:\n%s", out)
	}
	deployed := readFile(t, filepath.Join(env.home, ".config/opencode/commands/deploy.md"))
	if !contains(deployed, "fresh body") {
		t.Error("default-branch sync must deploy the fresh content, not the clone-time revision")
	}
}