package database

import (
	"database/sql"
	"fmt"
	"log"

	"nutfactory.org/Matrix/entities/user"
)

func initUserTable(db *sql.DB) (err error) {
	log.Printf("Init User Table")
	statement, err := db.Prepare(`CREATE TABLE IF NOT EXISTS user (
		id TEXT PRIMARY KEY,
		name TEXT,
		password TEXT
	)`)
	if err != nil {
		return
	}
	statement.Exec()

	//TODO: Test Queries

	return
}

func createUser(db *sql.DB, user *user.User) (err error) {
	sqlStmt := fmt.Sprintf(`INSERT INTO user
		(id, name, password)
		VALUES
		(?, ?, ?)`)

	tx, err := db.Begin()
	if err != nil {
		return
	}

	stmt, err := tx.Prepare(sqlStmt)
	if err != nil {
		return
	}
	defer stmt.Close()

	_, err = stmt.Exec(user.Id, user.Name, user.Password)
	if err != nil {
		return
	}
	tx.Commit()
	return
}

func readUser(db *sql.DB, id string) (foundUser *user.User, err error) {
	queryStmt := fmt.Sprintf(`SELECT id, name, password
		FROM user
		WHERE id = '%s'`, id)

	rows, err := db.Query(queryStmt)
	if err != nil {
		return
	}

	defer rows.Close()

	if rows.Next() {
		foundUser = &user.User{}
		err = rows.Scan(&foundUser.Id, &foundUser.Name, &foundUser.Password)
		if err != nil {
			return
		}
		foundUser.Devices, err = ReadDevicesForUser(db, foundUser.Id)
	}

	return
}

func updateUser(db *sql.DB, user *user.User) (err error) {
	sqlStmt := fmt.Sprintf(`UPDATE user SET
			name = ?,
			password = ?
		WHERE id = ?`)

	tx, err := db.Begin()
	if err != nil {
		return
	}

	stmt, err := tx.Prepare(sqlStmt)
	if err != nil {
		return
	}
	defer stmt.Close()

	_, err = stmt.Exec(user.Name, user.Password, user.Id)
	if err != nil {
		return
	}

	tx.Commit()
	return
}

func deleteUser(db *sql.DB, id string) (err error) {
	queryStmt := fmt.Sprintf(`DELETE FROM user 
		WHERE id = '%s'`, id)

	tx, err := db.Begin()
	if err != nil {
		return
	}

	_, err = db.Exec(queryStmt)
	if err != nil {
		return
	}

	tx.Commit()
	return
}