<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Console\Tests\Helper;

use Symfony\Component\Console\Helper\ProgressBar;
use Symfony\Component\Console\Output\StreamOutput;

class ProgressBarTest extends \PHPUnit_Framework_TestCase
{
    protected $lastMessagesLength;

    public function testAdvance()
    {
        $bar = new ProgressBar($output = $this->getOutputStream());
        $bar->start();
        $bar->advance();

        rewind($output->getStream());
        $this->assertEquals(
            $this->generateOutput('    0 [>---------------------------]').
            $this->generateOutput('    1 [->--------------------------]'),
            stream_get_contents($output->getStream())
        );
    }

    public function testAdvanceWithStep()
    {
        $bar = new ProgressBar($output = $this->getOutputStream());
        $bar->start();
        $bar->advance(5);

        rewind($output->getStream());
        $this->assertEquals(
            $this->generateOutput('    0 [>---------------------------]').
            $this->generateOutput('    5 [----->----------------------]'),
            stream_get_contents($output->getStream())
        );
    }

    public function testAdvanceMultipleTimes()
    {
        $bar = new ProgressBar($output = $this->getOutputStream());
        $bar->start();
        $bar->advance(3);
        $bar->advance(2);

        rewind($output->getStream());
        $this->assertEquals(
            $this->generateOutput('    0 [>---------------------------]').
            $this->generateOutput('    3 [--->------------------------]').
            $this->generateOutput('    5 [----->----------------------]'),
            stream_get_contents($output->getStream())
        );
    }

    public function testCustomizations()
    {
        $bar = new ProgressBar($output = $this->getOutputStream(), 10);
        $bar->setBarWidth(10);
        $bar->setBarCharacter('_');
        $bar->setEmptyBarCharacter(' ');
        $bar->setProgressCharacter('/');
        $bar->setFormat(' %current%/%max% [%bar%] %percent%%');
        $bar->start();
        $bar->advance();

        rewind($output->getStream());
        $this->assertEquals(
            $this->generateOutput('  0/10 [/         ]   0%').
            $this->generateOutput('  1/10 [_/        ]  10%'),
            stream_get_contents($output->getStream())
        );
    }

    public function testPercent()
    {
        $bar = new ProgressBar($output = $this->getOutputStream(), 50);
        $bar->start();
        $bar->display();
        $bar->advance();
        $bar->advance();

        rewind($output->getStream());
        $this->assertEquals(
            $this->generateOutput('  0/50 [>---------------------------]   0%').
            $this->generateOutput('  0/50 [>---------------------------]   0%').
            $this->generateOutput('  1/50 [>---------------------------]   2%').
            $this->generateOutput('  2/50 [=>--------------------------]   4%'),
            stream_get_contents($output->getStream())
        );
    }

    public function testOverwriteWithShorterLine()
    {
        $bar = new ProgressBar($output = $this->getOutputStream(), 50);
        $bar->setFormat(' %current%/%max% [%bar%] %percent%%');
        $bar->start();
        $bar->display();
        $bar->advance();

        // set shorter format
        $bar->setFormat(' %current%/%max% [%bar%]');
        $bar->advance();

        rewind($output->getStream());
        $this->assertEquals(
            $this->generateOutput('  0/50 [>---------------------------]   0%').
            $this->generateOutput('  0/50 [>---------------------------]   0%').
            $this->generateOutput('  1/50 [>---------------------------]   2%').
            $this->generateOutput('  2/50 [=>--------------------------]     '),
            stream_get_contents($output->getStream())
        );
    }

    public function testSetCurrentProgress()
    {
        $bar = new ProgressBar($output = $this->getOutputStream(), 50);
        $bar->start();
        $bar->display();
        $bar->advance();
        $bar->setCurrent(15);
        $bar->setCurrent(25);

        rewind($output->getStream());
        $this->assertEquals(
            $this->generateOutput('  0/50 [>---------------------------]   0%').
            $this->generateOutput('  0/50 [>---------------------------]   0%').
            $this->generateOutput('  1/50 [>---------------------------]   2%').
            $this->generateOutput(' 15/50 [========>-------------------]  30%').
            $this->generateOutput(' 25/50 [==============>-------------]  50%'),
            stream_get_contents($output->getStream())
        );
    }

    /**
     * @expectedException        \LogicException
     * @expectedExceptionMessage You must start the progress bar
     */
    public function testSetCurrentBeforeStarting()
    {
        $bar = new ProgressBar($this->getOutputStream());
        $bar->setCurrent(15);
    }

    /**
     * @expectedException        \LogicException
     * @expectedExceptionMessage You can't regress the progress bar
     */
    public function testRegressProgress()
    {
        $bar = new ProgressBar($output = $this->getOutputStream(), 50);
        $bar->start();
        $bar->setCurrent(15);
        $bar->setCurrent(10);
    }

    public function testRedrawFrequency()
    {
        $bar = $this->getMock('Symfony\Component\Console\Helper\ProgressBar', array('display'), array($output = $this->getOutputStream(), 6));
        $bar->expects($this->exactly(4))->method('display');

        $bar->setRedrawFrequency(2);
        $bar->start();
        $bar->setCurrent(1);
        $bar->advance(2);
        $bar->advance(2);
        $bar->advance(1);
    }

    public function testMultiByteSupport()
    {
        if (!function_exists('mb_strlen') || (false === $encoding = mb_detect_encoding('■'))) {
            $this->markTestSkipped('The mbstring extension is needed for multi-byte support');
        }

        $bar = new ProgressBar($output = $this->getOutputStream());
        $bar->start();
        $bar->setBarCharacter('■');
        $bar->advance(3);

        rewind($output->getStream());
        $this->assertEquals(
            $this->generateOutput('    0 [>---------------------------]').
            $this->generateOutput('    3 [■■■>------------------------]'),
            stream_get_contents($output->getStream())
        );
    }

    public function testClear()
    {
        $bar = new ProgressBar($output = $this->getOutputStream(), 50);
        $bar->start();
        $bar->setCurrent(25);
        $bar->clear();

        rewind($output->getStream());
        $this->assertEquals(
            $this->generateOutput('  0/50 [>---------------------------]   0%').
            $this->generateOutput(' 25/50 [==============>-------------]  50%').
            $this->generateOutput(''),
            stream_get_contents($output->getStream())
        );
    }

    public function testPercentNotHundredBeforeComplete()
    {
        $bar = new ProgressBar($output = $this->getOutputStream(), 200);
        $bar->start();
        $bar->display();
        $bar->advance(199);
        $bar->advance();

        rewind($output->getStream());
        $this->assertEquals(
            $this->generateOutput('   0/200 [>---------------------------]   0%').
            $this->generateOutput('   0/200 [>---------------------------]   0%').
            $this->generateOutput(' 199/200 [===========================>]  99%').
            $this->generateOutput(' 200/200 [============================] 100%'),
            stream_get_contents($output->getStream())
        );
    }

    public function testNonDecoratedOutput()
    {
        $bar = new ProgressBar($output = $this->getOutputStream(false));
        $bar->start();
        $bar->advance();

        rewind($output->getStream());
        $this->assertEquals('', stream_get_contents($output->getStream()));
    }

    public function testParallelBars()
    {
        $output = $this->getOutputStream();
        $bar1 = new ProgressBar($output, 2);
        $bar2 = new ProgressBar($output, 3);
        $bar2->setProgressCharacter('#');
        $bar3 = new ProgressBar($output);

        $bar1->start();
        $output->write("\n");
        $bar2->start();
        $output->write("\n");
        $bar3->start();

        for ($i = 1; $i <= 3; $i++) {
            // up two lines
            $output->write("\033[2A");
            if ($i <= 2) {
                $bar1->advance();
            }
            $output->write("\n");
            $bar2->advance();
            $output->write("\n");
            $bar3->advance();
        }
        $output->write("\033[2A");
        $output->write("\n");
        $output->write("\n");
        $bar3->finish();

        rewind($output->getStream());
        $this->assertEquals(
            $this->generateOutput(' 0/2 [>---------------------------]   0%')."\n".
            $this->generateOutput(' 0/3 [#---------------------------]   0%')."\n".
            rtrim($this->generateOutput('    0 [>---------------------------]')).

            "\033[2A".
            $this->generateOutput(' 1/2 [==============>-------------]  50%')."\n".
            $this->generateOutput(' 1/3 [=========#------------------]  33%')."\n".
            rtrim($this->generateOutput('    1 [->--------------------------]')).

            "\033[2A".
            $this->generateOutput(' 2/2 [============================] 100%')."\n".
            $this->generateOutput(' 2/3 [==================#---------]  66%')."\n".
            rtrim($this->generateOutput('    2 [-->-------------------------]')).

            "\033[2A".
            "\n".
            $this->generateOutput(' 3/3 [============================] 100%')."\n".
            rtrim($this->generateOutput('    3 [--->------------------------]')).

            "\033[2A".
            "\n".
            "\n".
            rtrim($this->generateOutput('    3 [============================]')),
            stream_get_contents($output->getStream())
        );
    }

    public function testAddingPlaceholderFormatter()
    {
        ProgressBar::setPlaceholderFormatter('%remaining_steps%', function (ProgressBar $bar) {
            return $bar->getMaxSteps() - $bar->getStep();
        });
        $bar = new ProgressBar($output = $this->getOutputStream(), 3);
        $bar->setFormat(' %remaining_steps% [%bar%]');

        $bar->start();
        $bar->advance();
        $bar->finish();

        rewind($output->getStream());
        $this->assertEquals(
            $this->generateOutput(' 3 [>---------------------------]').
            $this->generateOutput(' 2 [=========>------------------]').
            $this->generateOutput(' 0 [============================]'),
            stream_get_contents($output->getStream())
        );
    }

    public function testMultilineFormat()
    {
        $bar = new ProgressBar($output = $this->getOutputStream(), 3);
        $bar->setFormat("%bar%\nfoobar");

        $bar->start();
        $bar->advance();
        $bar->clear();
        $bar->finish();

        rewind($output->getStream());
        $this->assertEquals(
            $this->generateOutput(">---------------------------\nfoobar").
            $this->generateOutput("=========>------------------\nfoobar").
            $this->generateOutput("\n").
            $this->generateOutput("============================\nfoobar"),
            stream_get_contents($output->getStream())
        );
    }

    protected function getOutputStream($decorated = true)
    {
        return new StreamOutput(fopen('php://memory', 'r+', false), StreamOutput::VERBOSITY_NORMAL, $decorated);
    }

    protected function generateOutput($expected)
    {
        $expectedout = $expected;

        if (null !== $this->lastMessagesLength) {
            $expectedout = str_pad($expected, $this->lastMessagesLength, "\x20", STR_PAD_RIGHT);
        }

        $this->lastMessagesLength = strlen($expectedout);

        $count = substr_count($expected, "\n");

        return "\x0D".($count ? sprintf("\033[%dA", $count) : '').$expectedout;
    }
}