//go:build ignore

package main

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

	_ "github.com/go-sql-driver/mysql"
)

func main() {
	dsn := strings.TrimPrefix(os.Getenv("IM_MYSQL_DSN"), "mysql://")
	sqlFile := os.Getenv("IM_SQL_FILE")
	if dsn == "" || sqlFile == "" {
		fatal("IM_MYSQL_DSN and IM_SQL_FILE are required")
	}
	if !strings.Contains(dsn, "multiStatements=") {
		sep := "?"
		if strings.Contains(dsn, "?") {
			sep = "&"
		}
		dsn += sep + "multiStatements=true"
	}

	body, err := os.ReadFile(sqlFile)
	if err != nil {
		fatal(err)
	}
	db, err := sql.Open("mysql", dsn)
	if err != nil {
		fatal(err)
	}
	defer db.Close()
	if err = db.Ping(); err != nil {
		fatal(err)
	}
	if _, err = db.Exec(string(body)); err != nil {
		fatal(err)
	}
	fmt.Println("applied", sqlFile)
}

func fatal(v any) {
	fmt.Fprintln(os.Stderr, v)
	os.Exit(1)
}