package repository

import (
	"context"
	"errors"

	entity "git.ego.freeddns.org/egommerce/api-entities/identity/entity"
	db "git.ego.freeddns.org/egommerce/go-api-pkg/database"

	"github.com/jackc/pgx/v5/pgxpool"
)

type UserRepository struct {
	db *pgxpool.Pool
}

func NewUserRepository(db *pgxpool.Pool) *UserRepository {
	return &UserRepository{db}
}

func (r *UserRepository) FindByID(id string) (*entity.User, error) {
	var user entity.User

	sql := `SELECT id, username, password, email, created_at FROM identity.users WHERE id=$1 LIMIT 1`
	err := r.db.QueryRow(context.Background(), sql, id).
		Scan(&user.ID, &user.Username, &user.Password, &user.Email, &user.CreatedAt)
	if err != nil {
		return nil, errors.New("failed to fetch user from DB: " + err.Error())
	}

	return &user, nil
}

func (r *UserRepository) Create(user *entity.User) (string, error) {
	var id string

	sql := `INSERT INTO identity.users(email, username, password) VALUES($1, $2, $3) LIMIT 1 RETURNING id`
	err := r.db.QueryRow(context.Background(), sql, user.Email, user.Username, user.Password).Scan(&id)
	if err != nil {
		if err = db.IsDuplicatedRow(err); err != nil {
			return "", errors.New("username/email is already taken")
		}

		return "", errors.New("db error: " + err.Error())
	}

	return id, nil
}

func (r *UserRepository) Update(user *entity.User) (*entity.User, error) {
	return &entity.User{}, nil
}

func (r *UserRepository) Delete(id int64) (bool, error) {
	return true, nil
}

func (r *UserRepository) FindByUsername(login string) (*entity.User, error) {
	var user entity.User

	sql := `SELECT id, username, password, email, created_at FROM identity.users WHERE username=$1 LIMIT 1`
	err := r.db.QueryRow(context.Background(), sql, login).
		Scan(&user.ID, &user.Username, &user.Password, &user.Email, &user.CreatedAt)
	if err != nil {
		return nil, errors.New("failed to fetch user from DB: " + err.Error())
	}

	return &user, nil
}