package storage

import (
	"database/sql"
	"fmt"
	"strings"

	_ "modernc.org/sqlite"
)

var pragmas = map[string]string{
	`journal_mode`: `wal`,
	`synchronous`:  `normal`,
	`busy_timeout`: `30000`,
}

func buildSqliteDsn(path string, pragmas map[string]string) string {
	pragmastrs := make([]string, len(pragmas))
	i := 0
	for k, v := range pragmas {
		pragmastrs[i] = (fmt.Sprintf(`pragma=%s(%s)`, k, v))
		i++
	}
	return path + "?" + "mode=rwc&" + strings.Join(pragmastrs, "&")
}

func Open(path string) (*sql.DB, error) {
	dsn := buildSqliteDsn(path, pragmas)
	db, err := sql.Open("sqlite", dsn)
	if err != nil {
		return nil, err
	}
	return db, nil
}