package database

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

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

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

	/*
		newDevice := &device.Device{Id: "test", Name: "TEST", Keys: nil}
		err = CreateDevice(db, newDevice, "test")
		if err != nil {
			log.Printf("Error Create: %s", err)
			return
		}
		newDevice.Name = "TEST2"
		err = UpdateDevice(db, newDevice)
		if err != nil {
			log.Printf("Error Update: %s", err)
			return
		}
		devices, err := ReadDevicesForUser(db, "test")
		if err != nil {
			log.Printf("Error Read User: %s", err)
			return
		}
		log.Println(devices)
		err = DeleteDevice(db, newDevice.Id)
		if err != nil {
			log.Printf("Error Delete: %s", err)
			return
		}
		de, err := ReadDevice(db, "test")
		if err != nil {
			log.Printf("Error Read: %s", err)
			return
		}
		if de != nil {
			log.Printf("Device ID: %s Name: %s", de.Id, de.Name)
		} else {
			log.Printf("No Device found")
		}
	*/

	return
}

func CreateDevice(db *sql.DB, device *device.Device, userId string) (err error) {
	sqlStmt := fmt.Sprintf(`INSERT INTO device
		(id, name, userId)
		VALUES
		(?, ?, ?)`)

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

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

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

func ReadDevice(db *sql.DB, id string) (foundDevice *device.Device, err error) {
	queryStmt := fmt.Sprintf(`SELECT id, name 
		FROM device
		WHERE id = '%s'`, id)

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

	defer rows.Close()

	if rows.Next() {
		foundDevice = &device.Device{}
		err = rows.Scan(&foundDevice.Id, &foundDevice.Name)
		if err != nil {
			return
		}
		foundDevice.Keys, err = ReadKeysForDevice(db, foundDevice.Id)
	}

	return
}

func ReadDevicesForUser(db *sql.DB, userId string) (devices map[string]*device.Device, err error) {
	queryStmt := fmt.Sprintf(`SELECT id, name 
		FROM device
		WHERE userId = '%s'`, userId)

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

	defer rows.Close()

	devices = make(map[string]*device.Device)

	for rows.Next() {
		foundDevice := &device.Device{}
		err = rows.Scan(&foundDevice.Id, &foundDevice.Name)
		if err != nil {
			return
		}
		foundDevice.Keys, err = ReadKeysForDevice(db, foundDevice.Id)
		devices[foundDevice.Id] = foundDevice
	}

	return
}

func UpdateDevice(db *sql.DB, device *device.Device) (err error) {
	sqlStmt := fmt.Sprintf(`UPDATE device SET
			name = ?
		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(device.Name, device.Id)
	if err != nil {
		return
	}

	tx.Commit()
	return
}

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

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

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

	tx.Commit()
	return
}