package sqlite

import (
	"strings"

	"github.com/jmoiron/sqlx"

	// sqlite driver
	_ "github.com/mattn/go-sqlite3"
)

var db *sqlx.DB

// Initialize sets up the sqlite database.
func Initialize(filename string) (err error) {
	if db != nil {
		panic("sqlite.Initialize called twice!")
	}

	db, err = sqlx.Open("sqlite3", filename)
	if err != nil {
		db = nil
		return err
	}

	err = db.Ping()
	if err != nil {
		db.Close()
		db = nil
		return err
	}

	tableDefs := strings.Split(tableDefStr, ";")
	for _, tableDef := range tableDefs {
		_, err := db.Exec(strings.Trim(tableDef, "\n  "))
		if err != nil {
			db.Close()
			db = nil
			return err
		}
	}

	return nil
}

const tableDefStr = `

CREATE TABLE IF NOT EXISTS "user" (
	id INTEGER PRIMARY KEY AUTOINCREMENT,
	name VARCHAR(64) NOT NULL UNIQUE,
	hash VARCHAR(128) NOT NULL
);

CREATE TABLE IF NOT EXISTS "session" (
	id CHAR(64) PRIMARY KEY,
	user_id INTEGER NOT NULL,
	expire_date DATE NOT NULL
);

CREATE TABLE IF NOT EXISTS "bridge" (
	id INTEGER PRIMARY KEY AUTOINCREMENT,
	internal_id VARCHAR(255) NOT NULL,
	name VARCHAR(255) NOT NULL,
	driver VARCHAR(255) NOT NULL,
	addr VARCHAR(255) NOT NULL,
	key BLOB NOT NULL
);

CREATE TABLE IF NOT EXISTS "light" (
	id INTEGER PRIMARY KEY AUTOINCREMENT,
	bridge_id INTEGER NOT NULL,
	internal_id VARCHAR(255) NOT NULL,
	name VARCHAR(255) NOT NULL,
	'on' BOOLEAN NOT NULL,
	color VARCHAR(255) NOT NULL
)
`