#!/usr/bin/env php
<?php

class RecordFile {

  var $parser;

  var $records = [];

  function __construct($filename = null) {
    if (file_exists($filename) && $filename !== null){
      $this->parser = simplexml_load_file($filename);
      foreach ($this->parser->children() as $name => $child) {
        $record = new Record($child);
        if (!empty($record->type)) {
          $this->records[] = $record;
        }
      }
    } else {
      throw new Exception("File does not exist");
    }

  }

  function __toString() {
    $toReturn = [];
    foreach($this->records as $record) {
      $toReturn[$record->type] .= $record->type." ".$record->__toString() . PHP_EOL ;
    }
    return join(PHP_EOL, $toReturn);
  }
}


class Record {

  var $element;
  var $type;
  var $date;
  var $value;

  function __construct(SimpleXMLElement $child) {
    $type = @$child->attributes()['type'];
    if (empty($type)){
      return null;
    } else {
      $this->type = str_replace("HKQuantityTypeIdentifier", "", $type);;
      $this->element = $child;
      $this->parseElement();
    }
  }

  function parseElement() {
    $this->date = $this->iOSStringToDateTime(@$this->element->attributes()['startDate']);
    $this->value = @$this->element->attributes()['average'];
      if (empty($this->value)){
        $this->value = @$this->element->attributes()['value'];
    }
  }

  function iOSStringToDateTime($incoming) {
    $year = substr($incoming, 0, 4);
    $month = substr($incoming, 4, 2);
    $day = substr($incoming, 6, 2);
    $hour = substr($incoming, 8, 2);
    $minute = substr($incoming, 10, 2);
    return new DateTime($year."-".$month."-".$day." ".$hour.":".$minute.":"."00", new DateTimeZone("America/Los_Angeles"));
  }

  function __toString() {
    return (string) $this->date->format("l Y-m-d h:iA") . " " . $this->value;
  }

}






$args = $argv;

$scriptname = array_shift($args);
if (count($args) <= 0) {
  throw new Exception("This script requires a filename to parse. e.g. > ".$scriptname." ./file.xml");
}

$recordFile = new RecordFile(array_shift($args));

print($recordFile->__toString());