package update

import (
	domain "RenewCMS/internal/domain/update"
	"encoding/json"
	"os"
	"path/filepath"
	"sync"
)

const statusFilePermissions = 0o600

type JSONStatusStore struct {
	path string
	mu   sync.Mutex
}

var _ domain.StatusStore = &JSONStatusStore{}

func NewJSONStatusStore(path string) *JSONStatusStore {
	return &JSONStatusStore{path: path}
}

func (s *JSONStatusStore) Load() (domain.CheckResult, bool) {
	s.mu.Lock()
	defer s.mu.Unlock()

	content, err := os.ReadFile(s.path)
	if err != nil {
		return domain.CheckResult{}, false
	}
	var result domain.CheckResult
	if err := json.Unmarshal(content, &result); err != nil || result.CheckedAt.IsZero() {
		return domain.CheckResult{}, false
	}
	return result, true
}

func (s *JSONStatusStore) Save(result domain.CheckResult) error {
	s.mu.Lock()
	defer s.mu.Unlock()

	content, err := json.Marshal(result)
	if err != nil {
		return err
	}
	if err := os.MkdirAll(filepath.Dir(s.path), os.ModePerm); err != nil {
		return err
	}
	temporary := s.path + ".tmp"
	if err := os.WriteFile(temporary, content, statusFilePermissions); err != nil {
		return err
	}
	return os.Rename(temporary, s.path)
}