package main

import (
	"log"
	
)


func initDB() {
	log.Println("Setting up database...")

	tx, err := db.Begin()
	if err != nil {
		log.Fatal(err)
	}
	defer tx.Rollback()

	_, err = tx.Exec("set foreign_key_checks = 0")
	if err != nil {
		log.Fatal(err)
	}

	var name string
	rows, err := db.Query("show tables")
	if err != nil {
		log.Fatal(err)
	}
	for rows.Next() {
		err = rows.Scan(&name)
		if err != nil {
			log.Fatal(err)
		}
		_, err = tx.Exec("drop table " + name)
		if err != nil {
			log.Fatal(err)
		}
	}
	err = rows.Err()
	if err != nil {
		log.Fatal(err)
	}
	rows.Close()

	_, err = tx.Exec("set foreign_key_checks = 1")
	if err != nil {
		log.Fatal(err)
	}

	err = tx.Commit()
	if err != nil {
		log.Fatal(err)
	}

	log.Println("Database cleaned up")
	_, err = db.Exec(	 `CREATE TABLE user (
							id 			BIGINT UNSIGNED NOT NULL,
							user_id 	VARCHAR(32) NOT NULL,
							name 		VARCHAR(80) NOT NULL,
							guild_id    SMALLINT(5),
							PRIMARY KEY (id),
						  ) ENGINE = InnoDB CHARSET=utf8 COLLATE utf8_unicode_ci;`)
	if err != nil {
		log.Fatal(err)
	}

	_, err = db.Exec(	 `CREATE TABLE msg (
							id 		  BIGINT UNSIGNED NOT NULL,
							user_id   BIGINT UNSIGNED NOT NULL,
							direction ENUM('incoming', 'outgoing'),
							text      VARCHAR(4096) NOT NULL,
							FOREIGN KEY (user_id) REFERENCES user(id) ON DELETE CASCADE
						  ) ENGINE = InnoDB CHARSET=utf8 COLLATE utf8_unicode_ci;`)
	if err != nil {
		log.Fatal(err)
	}

	log.Println("Database set up")
}