package database


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

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

func New() *DatabaseHandle {
  var db DatabaseHandle
  // inject the whole database configuration via the well-known PG* env variables
  conn, err := gorm.Open(postgres.Open(""))
  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 (self *DatabaseHandle) GetPersonById(id string) (string, error) {
  if ! self.initialized {
    err := fmt.Errorf("Database connection not initialized")
    return "", err
  }

  var person Person
  result := self.dbh.
    Where("persons.id = ?", id).
    First(&person)

  if result.Error != nil {
    err := fmt.Errorf("Query failed: %s", result.Error)
    return "", err
  }

  return person.Name, nil
}