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 code_obj_type (
							 id			SMALLINT(5) UNSIGNED NOT NULL
							,intl_id	VARCHAR(32) NOT NULL
							,name		VARCHAR(80) NOT NULL
							,PRIMARY KEY (id)
						  ) ENGINE = InnoDB CHARSET=utf8 COLLATE utf8_unicode_ci;`)
	if err != nil {
		log.Fatal(err)
	}

	_, err = db.Exec(`CREATE TABLE obj (
							 id				BIGINT UNSIGNED NOT NULL AUTO_INCREMENT
							,obj_type_id	SMALLINT UNSIGNED NOT NULL
							,PRIMARY KEY (id)
						  ) ENGINE = InnoDB AUTO_INCREMENT = 0 CHARSET=utf8 COLLATE utf8_unicode_ci;`)
	if err != nil {
		log.Fatal(err)
	}

	_, err = db.Exec(`CREATE TABLE obj_user (
							 obj_id			BIGINT UNSIGNED NOT NULL
							,tg_id          BIGINT UNSIGNED NOT NULL
							,user_id		VARCHAR(32) NOT NULL
							,name			VARCHAR(80) NOT NULL
							,guild_id		BIGINT UNSIGNED
							,last_msg		TIMESTAMP
							,busy_until		TIMESTAMP
							,role			ENUM('commander', 'bartender', 'squire', 'none')
							,FOREIGN KEY (obj_id) REFERENCES obj(id) ON DELETE CASCADE
						  ) ENGINE = InnoDB CHARSET=utf8 COLLATE utf8_unicode_ci;`)
	if err != nil {
		log.Fatal(err)
	}

	_, err = db.Exec(`CREATE TABLE obj_guild (
							 obj_id				BIGINT UNSIGNED NOT NULL AUTO_INCREMENT
							,tag				VARCHAR(32) NOT NULL
							,name				VARCHAR(80) NOT NULL
							,chat_id			BIGINT NOT NULL
							,deposit_chat_id	BIGINT NOT NULL
							,FOREIGN KEY (obj_id) REFERENCES obj(id) ON DELETE CASCADE
						  ) ENGINE = InnoDB CHARSET=utf8 COLLATE utf8_unicode_ci;`)
	if err != nil {
		log.Fatal(err)
	}

	_, err = db.Exec(`CREATE TABLE obj_msg (
							 obj_id         BIGINT UNSIGNED NOT NULL
							,msg_id			BIGINT NOT NULL
							,chat_id        BIGINT NOT NULL
							,sender_user_id BIGINT NOT NULL
							,date           TIMESTAMP NOT NULL
							,text           VARCHAR(4096) NOT NULL
							,FOREIGN KEY (obj_id) REFERENCES obj(id) ON DELETE CASCADE
							,UNIQUE KEY (msg_id, chat_id, sender_user_id)
						  ) ENGINE = InnoDB CHARSET=utf8 COLLATE utf8_unicode_ci;`)
	if err != nil {
		log.Fatal(err)
	}

	_, err = db.Exec(`INSERT INTO code_obj_type (id, intl_id, name)
						  VALUES (1, "user", "User")
						        ,(2, "guild", "Guild")
						        ,(3, "msg", "Message");`)
	if err != nil {
		log.Fatal(err)
	}

	log.Println("Database set up")
}

func putMsg(m ChatWarsMessage) error {
	res, err := db.Exec(`INSERT INTO obj (obj_type_id)
						      VALUES (3);`)
	if err != nil {
		log.Fatal(err)
	}
	objId, err := res.LastInsertId()

	stmt, err := db.Prepare(`INSERT INTO msg	(obj_id, msg_id, chat_id, sender_user_id, date            , text)
							 VALUES 			(?,      ?,      ?,       ?,              FROM_UNIXTIME(?), ?);`)
	if err != nil {
		return err
	}
	defer stmt.Close()

	_, err = stmt.Exec(objId, m.ID64, m.ChatID64, m.SenderUserID64, m.Date, m.Text)
	if err != nil {
		return err
	}

	return nil
}