package release

import (
	"bytes"
	"errors"
	"os"
	"path/filepath"
	"strings"
	"testing"
	"time"

	"github.com/carlosframework/platform/internal/rootstate"
)

// Inject the directory-sync boundary after an actual file sync and rename.
// The embedded interface is intentionally unused: addRootHealthy needs Read
// and Write only, under the lock already held by recordRootHealthy.
type healthyRetryStore struct {
	rootstate.Store
	dir   string
	fail  int
	syncs int
	fault error
}

func (s *healthyRetryStore) Read(name string) ([]byte, error) {
	return os.ReadFile(filepath.Join(s.dir, name))
}
func (s *healthyRetryStore) Write(name string, b []byte) error {
	f, err := os.CreateTemp(s.dir, "history-")
	if err != nil {
		return err
	}
	tmp := f.Name()
	defer os.Remove(tmp)
	if _, err = f.Write(b); err != nil {
		f.Close()
		return err
	}
	if err = f.Sync(); err != nil {
		f.Close()
		return err
	}
	if err = f.Close(); err != nil {
		return err
	}
	if err = os.Rename(tmp, filepath.Join(s.dir, name)); err != nil {
		return err
	}
	s.syncs++
	if s.fail > 0 {
		s.fail--
		return s.fault
	}
	d, err := os.Open(s.dir)
	if err != nil {
		return err
	}
	defer d.Close()
	return d.Sync()
}
func TestPlan14HealthyDuplicateRetryDurability(t *testing.T) {
	fault := errors.New("injected account directory fsync failure")
	s := &healthyRetryStore{dir: t.TempDir(), fail: 2, fault: fault}
	original := HealthyBuild{SHA256: strings.Repeat("a", 64), Version: "v1", How: "live", At: time.Date(2026, 10, 12, 0, 0, 0, 0, time.UTC)}
	if err := addRootHealthy(s, "console", original); !errors.Is(err, fault) {
		t.Fatalf("first write: %v", err)
	}
	before, err := s.Read("console.json")
	if err != nil {
		t.Fatal(err)
	}
	retry := original
	retry.At = retry.At.Add(time.Hour)
	retry.How = "settle"
	retry.Version = "renamed"
	if err = addRootHealthy(s, "console", retry); !errors.Is(err, fault) {
		t.Fatalf("visible duplicate hid failed directory sync: %v", err)
	}
	if err = addRootHealthy(s, "console", retry); err != nil {
		t.Fatal(err)
	}
	if s.syncs != 3 {
		t.Fatalf("directory sync attempts = %d, want 3", s.syncs)
	}
	after, err := s.Read("console.json")
	if err != nil {
		t.Fatal(err)
	}
	if !bytes.Equal(before, after) {
		t.Fatal("retry replaced the original evidence bytes")
	}
	got, err := decodeRootHealthy(after)
	if err != nil || len(got) != 1 || got[0] != original {
		t.Fatalf("evidence = %#v: %v", got, err)
	}
}