package dao

import (
	"crypto/md5"
	"fmt"
	"io"
	"strings"

	"github.com/willie68/schematic-service-go/model"
)

/*
StorageDao this is the interface which all method implementation of a storage engine has to fulfill
*/
type StorageDao interface {
	AddFile(filename string, reader io.Reader) (string, error)
	CreateSchematic(schematic model.Schematic) (string, error)
	GetSchematic(schematicID string) (model.Schematic, error)
	UpdateSchematic(schematic model.Schematic) (string, error)
	GetFilename(fileid string) (string, error)
	GetFile(fileid string, stream io.Writer) error
	GetSchematics(query string, offset int, limit int, owner string) (int64, []model.Schematic, error)
	GetSchematicsCount(query string, owner string) (int64, error)
	DeleteSchematic(schematicID string) error
	CreateTag(tag string) error
	GetTags() []model.Tag
	GetTagsCount() int
	CreateManufacturer(manufacturer string) error
	GetManufacturers() []model.Manufacturer
	GetManufacturersCount() int

	CreateEffectType(effectType model.EffectType) (string, error)
	GetEffectTypes() ([]model.EffectType, error)

	CreateEffect(effect model.Effect) (string, error)
	GetEffectsCount(query string) (int, error)
	GetEffects(query string, offset int, limit int) (int, []model.Effect, error)
	GetEffect(effectID string) (model.Effect, error)

	CheckUser(username string, password string) bool
	GetUser(username string) (model.User, bool)

	AddUser(user model.User) error
	DeleteUser(username string) error
	ChangePWD(username string, newpassword string, oldpassword string) error

	DropAll()
	Ping() error

	Backup(path string) error
	Stop()
}

var Storage StorageDao

func GetStorage() StorageDao {
	return Storage
}

func BuildPasswordHash(password string) string {
	if !strings.HasPrefix(password, "md5:") {
		hash := md5.Sum([]byte(password))
		password = fmt.Sprintf("md5:%x", hash)
	}
	return password
}