package rest

import (
	"fmt"
	"github.com/eyebluecn/tank/code/core"
	"github.com/eyebluecn/tank/code/tool/i18n"
	"github.com/eyebluecn/tank/code/tool/result"
	"github.com/eyebluecn/tank/code/tool/util"
	"net/http"
	"regexp"
	"strings"
)

const (
	//root matter's uuid
	MATTER_ROOT = "root"
	//cache directory name.
	MATTER_CACHE = "cache"
	//zip file temp directory.
	MATTER_ZIP             = "zip"
	MATTER_NAME_MAX_LENGTH = 200
	MATTER_NAME_MAX_DEPTH  = 32
	//matter name pattern
	MATTER_NAME_PATTERN = `[\\/:*?"<>|]`
)

/**
 * file is too common. so we use matter as file.
 */
type Matter struct {
	Base
	Puuid    string    `json:"puuid" gorm:"type:char(36);index:idx_puuid"`
	UserUuid string    `json:"userUuid" gorm:"type:char(36);index:idx_uu"`
	Username string    `json:"username" gorm:"type:varchar(45) not null"`
	Dir      bool      `json:"dir" gorm:"type:tinyint(1) not null;default:0"`
	Name     string    `json:"name" gorm:"type:varchar(255) not null"`
	Md5      string    `json:"md5" gorm:"type:varchar(45)"`
	Size     int64     `json:"size" gorm:"type:bigint(20) not null;default:0"`
	Privacy  bool      `json:"privacy" gorm:"type:tinyint(1) not null;default:0"`
	Path     string    `json:"path" gorm:"type:varchar(1024)"`
	Times    int64     `json:"times" gorm:"type:bigint(20) not null;default:0"`
	Parent   *Matter   `json:"parent" gorm:"-"`
	Children []*Matter `json:"-" gorm:"-"`
	Prop     string    `json:"prop" gorm:"type:varchar(1024) not null;default:'{}'"`
}

// set File's table name to be `profiles`
func (Matter) TableName() string {
	return core.TABLE_PREFIX + "matter"
}

// get matter's absolute path. the Path property is relative path in db.
func (this *Matter) AbsolutePath() string {
	return GetUserMatterRootDir(this.Username) + this.Path
}

func (this *Matter) MimeType() string {
	return util.GetMimeType(util.GetExtension(this.Name))
}

//Create a root matter. It's convenient for copy and move
func NewRootMatter(user *User) *Matter {
	matter := &Matter{}
	matter.Uuid = MATTER_ROOT
	matter.UserUuid = user.Uuid
	matter.Username = user.Username
	matter.Dir = true
	matter.Path = ""
	matter.CreateTime = user.CreateTime
	matter.UpdateTime = user.UpdateTime

	return matter
}

//get user's root absolute path
func GetUserMatterRootDir(username string) (rootDirPath string) {

	rootDirPath = fmt.Sprintf("%s/%s/%s", core.CONFIG.MatterPath(), username, MATTER_ROOT)

	return rootDirPath
}

//get user's cache absolute path
func GetUserCacheRootDir(username string) (rootDirPath string) {

	rootDirPath = fmt.Sprintf("%s/%s/%s", core.CONFIG.MatterPath(), username, MATTER_CACHE)

	return rootDirPath
}

//get user's zip absolute path
func GetUserZipRootDir(username string) (rootDirPath string) {

	rootDirPath = fmt.Sprintf("%s/%s/%s", core.CONFIG.MatterPath(), username, MATTER_ZIP)

	return rootDirPath
}

//check matter's name. If error, panic.
func CheckMatterName(request *http.Request, name string) string {

	if name == "" {
		panic(result.BadRequest("name cannot be null"))
	}
	if strings.HasPrefix(name, " ") || strings.HasSuffix(name, " ") {
		panic(result.BadRequest("name cannot start with or end with space"))
	}
	if m, _ := regexp.MatchString(MATTER_NAME_PATTERN, name); m {
		panic(result.BadRequestI18n(request, i18n.MatterNameContainSpecialChars))
	}

	if len(name) > MATTER_NAME_MAX_LENGTH {
		panic(result.BadRequestI18n(request, i18n.MatterNameLengthExceedLimit, len(name), MATTER_NAME_MAX_LENGTH))
	}
	return name
}