package systemconfig

import (
	"context"
	"errors"
	"strconv"
)

var (
	ErrDependencyUnavailable = errors.New("dependency unavailable")
	ErrInvalidConfig         = errors.New("invalid config")
)

type Service struct {
	repo *Repository
}

func NewService(repo *Repository) *Service {
	return &Service{repo: repo}
}

func (s *Service) List(ctx context.Context) ([]ConfigDTO, error) {
	if s.repo == nil {
		return nil, ErrDependencyUnavailable
	}
	return s.repo.List(ctx)
}

func (s *Service) BackupSchedule(ctx context.Context) (*BackupScheduleDTO, error) {
	if s.repo == nil {
		return nil, ErrDependencyUnavailable
	}
	values := map[string]string{}
	for _, item := range defaultConfigs {
		if item.Key == "backup.schedule_enabled" || item.Key == "backup.full_hour" || item.Key == "backup.full_minute" || item.Key == "backup.binlog_interval_minutes" {
			values[item.Key] = item.Value
		}
	}
	for key := range values {
		value, err := s.repo.FindValue(ctx, key)
		if err != nil {
			return nil, err
		}
		values[key] = value
	}
	hour, _ := strconv.Atoi(values["backup.full_hour"])
	minute, _ := strconv.Atoi(values["backup.full_minute"])
	interval, _ := strconv.Atoi(values["backup.binlog_interval_minutes"])
	return &BackupScheduleDTO{
		Enabled:               values["backup.schedule_enabled"] == "true",
		FullHour:              hour,
		FullMinute:            minute,
		BinlogIntervalMinutes: interval,
	}, nil
}