<?php


Prado::using('System.Util.TDateTimeStamp');

/**
 * @package System.Util
 */
class TDateTimeStampTest extends PHPUnit_Framework_TestCase {

	public function testGetTimeStampAndFormat() {
		$s = new TDateTimeStamp;
		$t = $s->getTimeStamp(0,0,0);
		$this->assertEquals($s->formatDate('Y-m-d',$t), date('Y-m-d'));

		$t = $s->getTimeStamp(0,0,0,6,1,2102);
		$this->assertEquals($s->formatDate('Y-m-d',$t), '2102-06-01');

		$t = $s->getTimeStamp(0,0,0,2,1,2102);
		$this->assertEquals($s->formatDate('Y-m-d',$t), '2102-02-01');
	}

	public function testOverFlow() {
		$s = new TDateTimeStamp;
		$t = $s->getTimeStamp(0,0,0,3,33,1965);
		$this->assertEquals($s->formatDate('Y-m-d',$t), '1965-04-02', 'Error in day overflow 1');

		$t = $s->getTimeStamp(0,0,0,4,33,1971);
		$this->assertEquals($s->formatDate('Y-m-d',$t), '1971-05-03', 'Error in day overflow 2');
		$t = $s->getTimeStamp(0,0,0,1,60,1965);
		$this->assertEquals($s->formatDate('Y-m-d',$t), '1965-03-01', 'Error in day overflow 3 '.$s->formatDate('Y-m-d',$t));
		$t = $s->getTimeStamp(0,0,0,12,32,1965);
		$this->assertEquals($s->formatDate('Y-m-d',$t), '1966-01-01', 'Error in day overflow 4 '.$s->formatDate('Y-m-d',$t));
		$t = $s->getTimeStamp(0,0,0,12,63,1965);
		$this->assertEquals($s->formatDate('Y-m-d',$t), '1966-02-01', 'Error in day overflow 5 '.$s->formatDate('Y-m-d',$t));
		$t = $s->getTimeStamp(0,0,0,13,3,1965);
		$this->assertEquals($s->formatDate('Y-m-d',$t), '1966-01-03', 'Error in math overflow 1');
	}

	public function test2DigitTo4DigitYearConversion() {
		$s = new TDateTimeStamp;
		$this->assertEquals($s->get4DigitYear(00), 2000, "Err 2-digit 2000");
		$this->assertEquals($s->get4DigitYear(10), 2010, "Err 2-digit 2010");
		$this->assertEquals($s->get4DigitYear(20), 2020, "Err 2-digit 2020");
		$this->assertEquals($s->get4DigitYear(30), 2030, "Err 2-digit 2030");
		$this->assertEquals($s->get4DigitYear(40), 2040, "Err 2-digit 2040");
		$this->assertEquals($s->get4DigitYear(50), 1950, "Err 2-digit 1950");
		$this->assertEquals($s->get4DigitYear(90), 1990, "Err 2-digit 1990");
	}

	public function testStringFormating() {
		$s = new TDateTimeStamp;
		$fmt = '\d\a\t\e T Y-m-d H:i:s a A d D F g G h H i j l L m M n O \R\F\C2822 r s t U w y Y z Z 2003';
		$s1 = date($fmt,0);
		$s2 = $s->formatDate($fmt,0);
		$this->assertEquals($s1, $s2);//, " date() 0 failed \n $s1 \n $s2");

		for ($i=10; --$i > 0; ) {
				$ts = 3600.0*((rand()%60000)+(rand()%60000))+(rand()%60000);
				$s1 = date($fmt,$ts);
				$s2 = $s->formatDate($fmt,$ts);
				//print "$s1 <br>$s2 <p>";
				$this->assertEquals($s1,$s2);

				$a1 = getdate($ts);
				$a2 = $s->getDate($ts,false);
				$this->assertEquals($a1,$a2);
		}
	}

	public function testRandomDatesBetween1000And4000() {
		$this->assertIsValidDate(1000,1);
		//echo "Testing year ";
		for ($i=10; --$i >= 0;) {
			$y1 = 1000+rand(0,1970-1000);
			//echo $y1." ";
			$m = rand(1,12);
			$this->assertIsValidDate($y1,$m);

			$y1 = 3000-rand(0,3000-1970);
			//echo $y1." ";
			$this->assertIsValidDate($y1,$m);
		}
	}

	public function assertIsValidDate($y1,$m,$d=13) {
		$s = new TDateTimeStamp;
		$t = $s->getTimeStamp(0,0,0,$m,$d,$y1);
		$rez = $s->formatDate('Y-n-j H:i:s',$t);

		$this->assertEquals("$y1-$m-$d 00:00:00", $rez);
	}

	function testRandomDates() {
		$start = 1960+rand(0,10);
		$yrs = 12;
		$i = 365.25*86400*($start-1970);
		$offset = 36000+rand(10000,60000);
		$max = 365*$yrs*86400;
		$lastyear = 0;
		$s = new TDateTimeStamp;

		// we generate a timestamp, convert it to a date, and convert it back to a timestamp
		// and check if the roundtrip broke the original timestamp value.
		//print "Testing $start to ".($start+$yrs).", or $max seconds, offset=$offset: ";
		$fails = 0;
		for ($max += $i; $i < $max; $i += $offset) {
			$ret = $s->formatDate('m,d,Y,H,i,s',$i);
			$arr = explode(',',$ret);
			if ($lastyear != $arr[2])
				$lastyear = $arr[2];

			$newi = $s->getTimestamp($arr[3],$arr[4],$arr[5],$arr[0],$arr[1],$arr[2]);
			if ($i != $newi) {
				// This actually can fail if $i is in the middle of a time change due to DST
				$tz = new DateTimeZone(date_default_timezone_get());
				$transitions = $tz->getTransitions($i-3600, $i+3600);
				if(count($transitions) == 0)
					$fails++;

				//$j = mktime($arr[3],$arr[4],$arr[5],$arr[0],$arr[1],$arr[2]);
				//print "Error at $i, $j, getTimestamp() returned $newi ($ret)\n";
			}
		}
		$this->assertEquals($fails, 0);
	}
}