// cmd/createuser creates a new user in the database.
// Usage: DATABASE_URL=... go run ./cmd/createuser <username> <password>
package main

import (
	"context"
	"fmt"
	"os"

	"github.com/jackc/pgx/v5"

	"github.com/jacek/pamietnik/backend/internal/auth"
)

func main() {
	if len(os.Args) != 3 {
		fmt.Fprintln(os.Stderr, "usage: createuser <username> <password>")
		os.Exit(1)
	}
	username := os.Args[1]
	password := os.Args[2]

	if len(password) < 8 {
		fmt.Fprintln(os.Stderr, "password must be at least 8 characters")
		os.Exit(1)
	}

	dsn := os.Getenv("DATABASE_URL")
	if dsn == "" {
		dsn = "postgres://pamietnik:pamietnik@localhost:5432/pamietnik?sslmode=disable"
	}

	conn, err := pgx.Connect(context.Background(), dsn)
	if err != nil {
		fmt.Fprintln(os.Stderr, "db error:", err)
		os.Exit(1)
	}
	defer conn.Close(context.Background())

	hash, err := auth.HashPassword(password)
	if err != nil {
		fmt.Fprintln(os.Stderr, "hash error:", err)
		os.Exit(1)
	}

	_, err = conn.Exec(context.Background(),
		`INSERT INTO users (username, password_hash) VALUES ($1, $2)`,
		username, hash,
	)
	if err != nil {
		fmt.Fprintln(os.Stderr, "insert error:", err)
		os.Exit(1)
	}
	fmt.Printf("user '%s' created\n", username)
}