package database


import (
  "log"
  //"time"
  "gorm.io/driver/postgres"
  "gorm.io/gorm"
)

type DatabaseHandle struct {
  initialized bool
  dbh *gorm.DB 
}

func NewDatabaseHandle(dsn string) *DatabaseHandle {
  var db DatabaseHandle
  conn, err := gorm.Open(postgres.Open(dsn))
  if err != nil {
    log.Printf("Unable to open database connection: %s", err)
    db.initialized = false
  } else {
    db.dbh = conn
    db.initialized = true
    log.Println("Database connection opened")
  }
  return &db
}

func (dbh *DatabaseHandle) StoreMeasurement(measurement *Measurement) {
  if ! dbh.initialized {
    log.Println("Database connection not initialized, can not store, measurement lost")
    return
  }

  result := dbh.dbh.Create(measurement)
  if result.Error != nil {
    log.Printf("Unable to insert measurement: %s", result.Error)
    return
  }

  log.Println("Successfully stored measurement")
}