<?php
namespace Westdc\Visual;

class Record
{
	
	public $db;
	
	public $subdataset;
	
	public $timeFiled = "utctime";
	
	private $sql;
	
	function __construct($uuid = NULL,$identifier = "")
	{
		$this->initDatabase();
		
		if(!empty($identifier))
		{
			$this->subdataset = $identifier;
		}
		
		if(!empty($uuid) && !empty($identifier))
		{
			$this->initVisual($uuid);
		}
	}
	
	public function __invoke()
	{
		return $this->getData();
	}
	
	public function initDatabase()
	{
		$config = \Zend_Registry::get('config');
		
		$dsn = "pgsql:host={$config->visual_db->hostname};"
				  ."port={$config->visual_db->port};"
				  ."dbname={$config->visual_db->database};"
				  ."user={$config->visual_db->username};"
				  ."password={$config->visual_db->password}";

		$this->db = new \PDO($dsn);
	}
	
	public function initVisual($uuid)
	{
		$visual = new Visual;
		
		$var_data = $visual->getVisualVars($uuid);
		
		$this->sql = $this->makeSql($var_data['data'],$this->subdataset);
		
		//echo $this->sql;exit();
	}
	
	public function getSql()
	{
		return $this->sql;
	}
	
	public function getData()
	{
		$rs = $this->db->query($this->sql);
		
		$data = [];
		while($row = $rs->fetch(\PDO::FETCH_ASSOC))
		{
			
			$row['utctime'] = $this->utcMsTime(strtotime($row['utctime']));
			//var_dump($row);
			$data[] =  array(
				$row['utctime'],
				$row['value']
			);
		}
		
		return $data;
	}
	
	public function makeSql($table,$fieldValue)
	{
		$sql = "SELECT 
					{$this->timeFiled} as utctime , \"$fieldValue\" as value
				FROM $table
				ORDER BY  
					extract(YEAR from \"{$this->timeFiled}\") ASC,
					extract(MONTH from \"{$this->timeFiled}\") ASC,
					extract(DAY from \"{$this->timeFiled}\") ASC,
					extract(HOUR from \"{$this->timeFiled}\") ASC,
					extract(MINUTE from \"{$this->timeFiled}\") ASC,
					extract(SECOND from \"{$this->timeFiled}\") ASC
				";
		
		return $sql;
	}
	
	public function utcMsTime($time=''){
		if(empty($time))
			return (time()+8*3600)*1000;
		else
			return $time*1000;
	}
}