package user

import (
	"fmt"

	"github.com/speps/go-hashids"

	"code.chrissexton.org/cws/happy/db"
	"github.com/rs/zerolog/log"
)

// lol

type UserFactory struct {
	db   *db.Database
	salt string
	h    *hashids.HashID
}

func NewFactory(db *db.Database, salt string, h *hashids.HashID) *UserFactory {
	return &UserFactory{
		db:   db,
		salt: salt,
		h:    h,
	}
}

func (uf *UserFactory) NewUser() (User, error) {
	uid := New(uf.db, uf.salt, uf.h)
	q := `insert into users (verification,dateCreated) values (?, ?)`
	res, err := uf.db.Exec(q, uid.Verification, uid.DateCreated)
	if err != nil {
		return uid, err
	}
	id, err := res.LastInsertId()
	if err != nil {
		return uid, err
	}
	uid.ID = id
	return uid, nil
}

func (uf *UserFactory) FromStr(uid, verification string) (User, error) {
	id := New(uf.db, uf.salt, uf.h)
	if uid == "" || verification == "" {
		return id, fmt.Errorf("user ID and verification not given.")
	}
	idInt, err := uf.h.DecodeInt64WithError(uid)
	if err != nil {
		return id, err
	}
	q := `select id,email,verification,datecreated,lastlogin from users where id=?`
	if err := uf.db.Get(&id, q, idInt[0]); err != nil {
		log.Error().
			Err(err).
			Msg("unable to select")
		return id, err
	}
	verify, err := uf.h.EncodeInt64([]int64{id.Verification})
	if err != nil {
		log.Error().
			Err(err).
			Str("verify", verify).
			Str("id.Verification", verification).
			Msg("unable to encode")
		return id, err
	}
	if verify != verification {
		log.Debug().
			Str("verify", verify).
			Str("id.Verification", verification).
			Msg("verification mismatch")
		return id, fmt.Errorf("Invalid verification token")
	}
	return id, nil
}