package db

import "log"

func install() {
	var err error
	log.Println("Installing tables")
	tx, err := DB.Begin()
	if err != nil{
		log.Fatal(err)
		tx.Rollback()
	}

	_, err = tx.Exec(`
CREATE TABLE timetables (
	id serial primary key,
	"name" text NOT NULL,
	"limit" integer NOT NULL DEFAULT 1,
	status bool NOT NULL DEFAULT false,
	created timestamp NOT NULL DEFAULT now()
);
	`)
	if err != nil{
		log.Fatal(err)
		tx.Rollback()
	}

	_, err = tx.Exec(`
CREATE TABLE timeslots (
	id serial primary key,
	ttid integer not null references timetables(id),
	"name" text NOT NULL,
	"time" text NOT NULL,
	capacity integer NOT NULL DEFAULT 1,
	take integer NOT NULL DEFAULT 0 check (take <= capacity),
	created timestamp NOT NULL DEFAULT now()
);
	`)


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

	_, err = tx.Exec(`
CREATE TABLE takes (
	username text NOT NULL,
	tsid integer NOT null references timeslots(id),
	created timestamp not null default now(),
	PRIMARY KEY (username, tsid)
);
	`)

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

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

	log.Println("Successfully installed all tables")
}