//go:build linux || darwin

package cli

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

func TestRunCreatesReusableGroupAccessibleCacheState(t *testing.T) {
	previousUmask := syscall.Umask(0o007)
	defer syscall.Umask(previousUmask)

	roots := newStateTestRoots(t)
	harness := newStateTestHarness()
	result := runStateTest(t, roots, harness.options(), false, false, "auto")
	if result.code != 0 {
		t.Fatalf("initial run code=%d stderr=%q", result.code, result.stderr)
	}
	assertGroupAccessibleCacheTree(t, roots.plans)
	assertGroupAccessibleCacheTree(t, roots.checkpoints)

	extractCalls := harness.extractCalls
	result = runStateTest(t, roots, harness.options(), false, true, "auto")
	if result.code != 0 {
		t.Fatalf("resume run code=%d stderr=%q", result.code, result.stderr)
	}
	if harness.extractCalls != extractCalls {
		t.Fatalf("extract calls after reuse = %d, want %d", harness.extractCalls, extractCalls)
	}
}

func assertGroupAccessibleCacheTree(t *testing.T, root string) {
	t.Helper()
	if err := filepath.Walk(root, func(path string, info os.FileInfo, err error) error {
		if err != nil {
			return err
		}
		want := os.FileMode(0o660)
		if info.IsDir() {
			want = 0o770
		}
		if got := info.Mode().Perm(); got != want {
			return fmt.Errorf("%s mode = %#o, want %#o", path, got, want)
		}
		return nil
	}); err != nil {
		t.Fatal(err)
	}
}