<?php
/**
 * PHPCI - Continuous Integration for PHP
 *
 * @copyright    Copyright 2014, Block 8 Limited.
 * @license      https://github.com/Block8/PHPCI/blob/master/LICENSE.md
 * @link         https://www.phptesting.org/
 */

namespace PHPCI\Plugin;

use PHPCI;
use PHPCI\Builder;
use PHPCI\Helper\Lang;
use PHPCI\Model\Build;
use PHPCI\Model\BuildError;
use PHPCI\Plugin\Option\PhpUnitOptions;
use PHPCI\Plugin\Util\PhpUnitResult;

/**
 * PHP Unit Plugin V2 - Extends the functionality of the original PHP Unit plugin
 *
 * @author       Pablo Tejada <pablo@ptejada.com>
 * @package      PHPCI
 * @subpackage   Plugins
 */
class PhpUnitV2 implements PHPCI\Plugin, PHPCI\ZeroConfigPlugin
{
    protected $phpci;
    protected $build;

    /** @var string[] Raw options from the PHPCI config file */
    protected $options = array();

    /**
     * Standard Constructor
     * $options['config']    Path to a PHPUnit XML configuration file.
     * $options['run_from']  The directory where the phpunit command will run from when using 'config'.
     * $options['coverage']  Value for the --coverage-html command line flag.
     * $options['directory'] Optional directory or list of directories to run PHPUnit on.
     * $options['args']      Command line args (in string format) to pass to PHP Unit
     *
     * @param Builder  $phpci
     * @param Build    $build
     * @param string[] $options
     */
    public function __construct(Builder $phpci, Build $build, array $options = array())
    {
        $this->phpci   = $phpci;
        $this->build   = $build;
        $this->options = new PhpUnitOptions($options);
    }

    /**
     * Check if the plugin can be executed without any configurations
     *
     * @param         $stage
     * @param Builder $builder
     * @param Build   $build
     *
     * @return bool
     */
    public static function canExecute($stage, Builder $builder, Build $build)
    {
        if ($stage == 'test' && !is_null(PhpUnitOptions::findConfigFile($build->getBuildPath()))) {
            return true;
        }

        return false;
    }

    /**
     * Runs PHP Unit tests in a specified directory, optionally using specified config file(s).
     */
    public function execute()
    {
        $xmlConfigFiles = $this->options->getConfigFiles($this->build->getBuildPath());
        $directories    = $this->options->getDirectories();
        if (empty($xmlConfigFiles) && empty($directories)) {
            $this->phpci->logFailure(Lang::get('phpunit_fail_init'));
            return false;
        }

        $success = array();

        // Run any directories
        if (!empty($directories)) {
            foreach ($directories as $directory) {
                $success[] = $this->runDir($directory);
            }
        } else {
            // Run any config files
            if (!empty($xmlConfigFiles)) {
                foreach ($xmlConfigFiles as $configFile) {
                    $success[] = $this->runConfigFile($configFile);
                }
            }
        }

        return !in_array(false, $success);
    }

    /**
     * Run the PHPUnit tests in a specific directory or array of directories.
     *
     * @param $directory
     *
     * @return bool|mixed
     */
    protected function runDir($directory)
    {
        $options = clone $this->options;

        $buildPath = $this->build->getBuildPath() . DIRECTORY_SEPARATOR;

        $currentPath = getcwd();
        // Change the directory
        chdir($buildPath);

        // Save the results into a json file
        $jsonFile = tempnam(dirname($buildPath), 'jLog_');
        $options->addArgument('log-json', $jsonFile);

        // Removes any current configurations files
        $options->removeArgument('configuration');

        $arguments = $this->phpci->interpolate($options->buildArgumentString());
        $cmd       = $this->phpci->findBinary('phpunit') . ' %s "%s"';
        $success   = $this->phpci->executeCommand($cmd, $arguments, $directory);

        // Change to che original path
        chdir($currentPath);

        $this->processResults($jsonFile);

        return $success;
    }

    /**
     * Run the tests defined in a PHPUnit config file.
     *
     * @param $configFile
     *
     * @return bool|mixed
     */
    protected function runConfigFile($configFile)
    {
        $options = clone $this->options;
        $runFrom = $options->getRunFrom();

        $buildPath = $this->build->getBuildPath() . DIRECTORY_SEPARATOR;
        if ($runFrom) {
            $originalPath = getcwd();
            // Change the directory
            chdir($buildPath . $runFrom);
        }

        // Save the results into a json file
        $jsonFile = tempnam($this->phpci->buildPath, 'jLog_');
        $options->addArgument('log-json', $jsonFile);

        // Removes any current configurations files
        $options->removeArgument('configuration');
        // Only the add the configuration file been passed
        $options->addArgument('configuration', $buildPath . $configFile);

        $arguments = $this->phpci->interpolate($options->buildArgumentString());
        $cmd       = $this->phpci->findBinary('phpunit') . ' %s %s';
        $success   = $this->phpci->executeCommand($cmd, $arguments, $options->getTestsPath());

        if (!empty($originalPath)) {
            // Change to che original path
            chdir($originalPath);
        }

        $this->processResults($jsonFile);

        return $success;
    }

    /**
     * Saves the test results
     *
     * @param string $jsonFile
     *
     * @throws \Exception If the failed to parse the JSON file
     */
    protected function processResults($jsonFile)
    {
        if (is_file($jsonFile)) {
            $parser = new PhpUnitResult($jsonFile, $this->build->getBuildPath());

            $this->build->storeMeta('phpunit-data', $parser->parse()->getResults());
            $this->build->storeMeta('phpunit-errors', $parser->getFailures());

            foreach ($parser->getErrors() as $error) {
                $severity = $error['severity'] == $parser::SEVERITY_ERROR ? BuildError::SEVERITY_CRITICAL : BuildError::SEVERITY_HIGH;
                $this->build->reportError(
                    $this->phpci, 'php_unit', $error['message'], $severity, $error['file'], $error['line']
                );
            }

        } else {
            throw new \Exception('JSON output file does not exist: ' . $jsonFile);
        }
    }
}