package main

import (
	"crypto/sha1"
	"database/sql/driver"
	"encoding/hex"
	"fmt"
	"strings"
)

type uuid [16]byte

var urlNS = uuid{0x6b, 0xa7, 0xb8, 0x10, 0x9d, 0xad, 0x11, 0xd1, 0x80, 0xb4, 0x00, 0xc0, 0x4f, 0xd4, 0x30, 0xc8}

func (u uuid) UUID5(value string) uuid {
	h := sha1.New()
	h.Write(u[:])
	h.Write([]byte(value))
	return uuid(h.Sum(nil))
}

func (u *uuid) UnmarshalText(data string) error {
	data = strings.Trim(data, "{}")
	data = strings.ReplaceAll(data, "-", "")

	_, err := hex.Decode(u[:], []byte(data))
	return err
}
func (u uuid) MarshalText() string {
	s := hex.EncodeToString(u[:])
	return fmt.Sprintf("{%s-%s-%s-%s-%s}", s[:8], s[8:12], s[12:16], s[16:20], s[20:])
}

func (u uuid) Value() (driver.Value, error) {
	return u[:], nil
}

func (u *uuid) Scan(value any) error {
	if value == nil {
		return nil
	}
	*u = uuid(value.([]byte))
	return nil
}

type uuids []uuid

func (lis uuids) ToStrList() strList {
	arr := make(strList, len(lis))
	for i, v := range lis {
		arr[i] = v.MarshalText()
	}
	return arr
}

type strList []string

func (l *strList) Scan(value any) error {
	s := value.(string)
	s = strings.Trim(s, "[]")
	for _, v := range strings.Split(s, ",") {
		v = strings.TrimSpace(v)
		v = strings.Trim(v, "\",")
		*l = append(*l, v)
	}

	return nil
}

func (l strList) Value() (driver.Value, error) {
	arr := make([]string, len(l))
	for i, v := range l {
		arr[i] = "\""+v+"\""
	}

	return "["+strings.Join(arr, ",") +"]", nil
}