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<?php

declare(strict_types=1);

/*
 * This file is part of PHP CS Fixer.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *     Dariusz Rumiński <dariusz.ruminski@gmail.com>
 *
 * This source file is subject to the MIT license that is bundled
 * with this source code in the file LICENSE.
 */

namespace PhpCsFixer\Console\Command;

use PhpCsFixer\Config;
use PhpCsFixer\ConfigInterface;
use PhpCsFixer\ConfigurationException\InvalidConfigurationException;
use PhpCsFixer\Console\Application;
use PhpCsFixer\Console\ConfigurationResolver;
use PhpCsFixer\Console\Output\ErrorOutput;
use PhpCsFixer\Console\Output\OutputContext;
use PhpCsFixer\Console\Output\Progress\ProgressOutputFactory;
use PhpCsFixer\Console\Output\Progress\ProgressOutputType;
use PhpCsFixer\Console\Report\FixReport\ReportSummary;
use PhpCsFixer\Error\ErrorsManager;
use PhpCsFixer\FixerFileProcessedEvent;
use PhpCsFixer\Runner\Runner;
use PhpCsFixer\ToolInfoInterface;
use Symfony\Component\Console\Attribute\AsCommand;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Formatter\OutputFormatter;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\ConsoleOutputInterface;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Terminal;
use Symfony\Component\EventDispatcher\EventDispatcher;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;
use Symfony\Component\Stopwatch\Stopwatch;

/**
 * @author Fabien Potencier <fabien@symfony.com>
 * @author Dariusz Rumiński <dariusz.ruminski@gmail.com>
 *
 * @final
 *
 * @internal
 */
#[AsCommand(name: 'fix', description: 'Fixes a directory or a file.')]
/* final */ class FixCommand extends Command
{
    /** @var string */
    protected static $defaultName = 'fix';

    /** @var string */
    protected static $defaultDescription = 'Fixes a directory or a file.';

    private EventDispatcherInterface $eventDispatcher;

    private ErrorsManager $errorsManager;

    private Stopwatch $stopwatch;

    private ConfigInterface $defaultConfig;

    private ToolInfoInterface $toolInfo;

    private ProgressOutputFactory $progressOutputFactory;

    public function __construct(ToolInfoInterface $toolInfo)
    {
        parent::__construct();

        $this->eventDispatcher = new EventDispatcher();
        $this->errorsManager = new ErrorsManager();
        $this->stopwatch = new Stopwatch();
        $this->defaultConfig = new Config();
        $this->toolInfo = $toolInfo;
        $this->progressOutputFactory = new ProgressOutputFactory();
    }

    /**
     * {@inheritdoc}
     *
     * Override here to only generate the help copy when used.
     */
    public function getHelp(): string
    {
        return <<<'EOF'
            The <info>%command.name%</info> command tries to %command.name% as much coding standards
            problems as possible on a given file or files in a given directory and its subdirectories:

                <info>$ php %command.full_name% /path/to/dir</info>
                <info>$ php %command.full_name% /path/to/file</info>

            By default <comment>--path-mode</comment> is set to `override`, which means, that if you specify the path to a file or a directory via
            command arguments, then the paths provided to a `Finder` in config file will be ignored. You can use <comment>--path-mode=intersection</comment>
            to merge paths from the config file and from the argument:

                <info>$ php %command.full_name% --path-mode=intersection /path/to/dir</info>

            The <comment>--format</comment> option for the output format. Supported formats are `txt` (default one), `json`, `xml`, `checkstyle`, `junit` and `gitlab`.

            NOTE: the output for the following formats are generated in accordance with schemas

            * `checkstyle` follows the common `"checkstyle" XML schema </doc/schemas/fix/checkstyle.xsd>`_
            * `gitlab` follows the `codeclimate JSON schema </doc/schemas/fix/codeclimate.json>`_
            * `json` follows the `own JSON schema </doc/schemas/fix/schema.json>`_
            * `junit` follows the `JUnit XML schema from Jenkins </doc/schemas/fix/junit-10.xsd>`_
            * `xml` follows the `own XML schema </doc/schemas/fix/xml.xsd>`_

            The <comment>--quiet</comment> Do not output any message.

            The <comment>--verbose</comment> option will show the applied rules. When using the `txt` format it will also display progress notifications.

            NOTE: if there is an error like "errors reported during linting after fixing", you can use this to be even more verbose for debugging purpose

            * `-v`: verbose
            * `-vv`: very verbose
            * `-vvv`: debug

            The <comment>--rules</comment> option limits the rules to apply to the
            project:

            EOF. /* @TODO: 4.0 - change to @PER */ <<<'EOF'

                <info>$ php %command.full_name% /path/to/project --rules=@PSR12</info>

            By default the PSR-12 rules are used.

            The <comment>--rules</comment> option lets you choose the exact rules to
            apply (the rule names must be separated by a comma):

                <info>$ php %command.full_name% /path/to/dir --rules=line_ending,full_opening_tag,indentation_type</info>

            You can also exclude the rules you don't want by placing a dash in front of the rule name, if this is more convenient,
            using <comment>-name_of_fixer</comment>:

                <info>$ php %command.full_name% /path/to/dir --rules=-full_opening_tag,-indentation_type</info>

            When using combinations of exact and exclude rules, applying exact rules along with above excluded results:

                <info>$ php %command.full_name% /path/to/project --rules=@Symfony,-@PSR1,-blank_line_before_statement,strict_comparison</info>

            Complete configuration for rules can be supplied using a `json` formatted string.

                <info>$ php %command.full_name% /path/to/project --rules='{"concat_space": {"spacing": "none"}}'</info>

            The <comment>--dry-run</comment> flag will run the fixer without making changes to your files.

            The <comment>--sequential</comment> flag will enforce sequential analysis even if parallel config is provided.

            The <comment>--diff</comment> flag can be used to let the fixer output all the changes it makes.

            The <comment>--allow-risky</comment> option (pass `yes` or `no`) allows you to set whether risky rules may run. Default value is taken from config file.
            A rule is considered risky if it could change code behaviour. By default no risky rules are run.

            The <comment>--stop-on-violation</comment> flag stops the execution upon first file that needs to be fixed.

            The <comment>--show-progress</comment> option allows you to choose the way process progress is rendered:

            * <comment>none</comment>: disables progress output;
            * <comment>dots</comment>: multiline progress output with number of files and percentage on each line.
            * <comment>bar</comment>: single line progress output with number of files and calculated percentage.

            If the option is not provided, it defaults to <comment>bar</comment> unless a config file that disables output is used, in which case it defaults to <comment>none</comment>. This option has no effect if the verbosity of the command is less than <comment>verbose</comment>.

                <info>$ php %command.full_name% --verbose --show-progress=dots</info>

            By using <comment>--using-cache</comment> option with `yes` or `no` you can set if the caching
            mechanism should be used.

            The command can also read from standard input, in which case it won't
            automatically fix anything:

                <info>$ cat foo.php | php %command.full_name% --diff -</info>

            Finally, if you don't need BC kept on CLI level, you might use `PHP_CS_FIXER_FUTURE_MODE` to start using options that
            would be default in next MAJOR release and to forbid using deprecated configuration:

                <info>$ PHP_CS_FIXER_FUTURE_MODE=1 php %command.full_name% -v --diff</info>

            Exit code
            ---------

            Exit code of the `%command.name%` command is built using following bit flags:

            *  0 - OK.
            *  1 - General error (or PHP minimal requirement not matched).
            *  4 - Some files have invalid syntax (only in dry-run mode).
            *  8 - Some files need fixing (only in dry-run mode).
            * 16 - Configuration error of the application.
            * 32 - Configuration error of a Fixer.
            * 64 - Exception raised within the application.

            EOF;
    }

    protected function configure(): void
    {
        $this->setDefinition(
            [
                new InputArgument('path', InputArgument::IS_ARRAY, 'The path(s) that rules will be run against (each path can be a file or directory).'),
                new InputOption('path-mode', '', InputOption::VALUE_REQUIRED, 'Specify path mode (can be `override` or `intersection`).', ConfigurationResolver::PATH_MODE_OVERRIDE),
                new InputOption('allow-risky', '', InputOption::VALUE_REQUIRED, 'Are risky fixers allowed (can be `yes` or `no`).'),
                new InputOption('config', '', InputOption::VALUE_REQUIRED, 'The path to a config file.'),
                new InputOption('dry-run', '', InputOption::VALUE_NONE, 'Only shows which files would have been modified.'),
                new InputOption('rules', '', InputOption::VALUE_REQUIRED, 'List of rules that should be run against configured paths.'),
                new InputOption('using-cache', '', InputOption::VALUE_REQUIRED, 'Should cache be used (can be `yes` or `no`).'),
                new InputOption('cache-file', '', InputOption::VALUE_REQUIRED, 'The path to the cache file.'),
                new InputOption('diff', '', InputOption::VALUE_NONE, 'Prints diff for each file.'),
                new InputOption('format', '', InputOption::VALUE_REQUIRED, 'To output results in other formats.'),
                new InputOption('stop-on-violation', '', InputOption::VALUE_NONE, 'Stop execution on first violation.'),
                new InputOption('show-progress', '', InputOption::VALUE_REQUIRED, 'Type of progress indicator (none, dots).'),
                new InputOption('sequential', '', InputOption::VALUE_NONE, 'Enforce sequential analysis.'),
            ]
        );
    }

    protected function execute(InputInterface $input, OutputInterface $output): int
    {
        $verbosity = $output->getVerbosity();

        $passedConfig = $input->getOption('config');
        $passedRules = $input->getOption('rules');

        if (null !== $passedConfig && null !== $passedRules) {
            throw new InvalidConfigurationException('Passing both `--config` and `--rules` options is not allowed.');
        }

        $resolver = new ConfigurationResolver(
            $this->defaultConfig,
            [
                'allow-risky' => $input->getOption('allow-risky'),
                'config' => $passedConfig,
                'dry-run' => $this->isDryRun($input),
                'rules' => $passedRules,
                'path' => $input->getArgument('path'),
                'path-mode' => $input->getOption('path-mode'),
                'using-cache' => $input->getOption('using-cache'),
                'cache-file' => $input->getOption('cache-file'),
                'format' => $input->getOption('format'),
                'diff' => $input->getOption('diff'),
                'stop-on-violation' => $input->getOption('stop-on-violation'),
                'verbosity' => $verbosity,
                'show-progress' => $input->getOption('show-progress'),
                'sequential' => $input->getOption('sequential'),
            ],
            getcwd(),
            $this->toolInfo
        );

        $reporter = $resolver->getReporter();

        $stdErr = $output instanceof ConsoleOutputInterface
            ? $output->getErrorOutput()
            : ('txt' === $reporter->getFormat() ? $output : null);

        if (null !== $stdErr) {
            $stdErr->writeln(Application::getAboutWithRuntime(true));
            $isParallel = $resolver->getParallelConfig()->getMaxProcesses() > 1;

            $stdErr->writeln(\sprintf(
                'Running analysis on %d core%s.',
                $resolver->getParallelConfig()->getMaxProcesses(),
                $isParallel ? \sprintf(
                    's with %d file%s per process',
                    $resolver->getParallelConfig()->getFilesPerProcess(),
                    $resolver->getParallelConfig()->getFilesPerProcess() > 1 ? 's' : ''
                ) : ' sequentially'
            ));

            /** @TODO v4 remove warnings related to parallel runner */
            $usageDocs = 'https://cs.symfony.com/doc/usage.html';
            $stdErr->writeln(\sprintf(
                $stdErr->isDecorated() ? '<bg=yellow;fg=black;>%s</>' : '%s',
                $isParallel
                    ? 'Parallel runner is an experimental feature and may be unstable, use it at your own risk. Feedback highly appreciated!'
                    : \sprintf(
                        'You can enable parallel runner and speed up the analysis! Please see %s for more information.',
                        $stdErr->isDecorated()
                            ? \sprintf('<href=%s;bg=yellow;fg=red;bold>usage docs</>', OutputFormatter::escape($usageDocs))
                            : $usageDocs
                    )
            ));

            $configFile = $resolver->getConfigFile();
            $stdErr->writeln(\sprintf('Loaded config <comment>%s</comment>%s.', $resolver->getConfig()->getName(), null === $configFile ? '' : ' from "'.$configFile.'"'));

            if ($resolver->getUsingCache()) {
                $cacheFile = $resolver->getCacheFile();

                if (is_file($cacheFile)) {
                    $stdErr->writeln(\sprintf('Using cache file "%s".', $cacheFile));
                }
            }
        }

        $finder = new \ArrayIterator(iterator_to_array($resolver->getFinder()));

        if (null !== $stdErr && $resolver->configFinderIsOverridden()) {
            $stdErr->writeln(
                \sprintf($stdErr->isDecorated() ? '<bg=yellow;fg=black;>%s</>' : '%s', 'Paths from configuration file have been overridden by paths provided as command arguments.')
            );
        }

        $progressType = $resolver->getProgressType();
        $progressOutput = $this->progressOutputFactory->create(
            $progressType,
            new OutputContext(
                $stdErr,
                (new Terminal())->getWidth(),
                \count($finder)
            )
        );

        $runner = new Runner(
            $finder,
            $resolver->getFixers(),
            $resolver->getDiffer(),
            ProgressOutputType::NONE !== $progressType ? $this->eventDispatcher : null,
            $this->errorsManager,
            $resolver->getLinter(),
            $resolver->isDryRun(),
            $resolver->getCacheManager(),
            $resolver->getDirectory(),
            $resolver->shouldStopOnViolation(),
            $resolver->getParallelConfig(),
            $input,
            $resolver->getConfigFile()
        );

        $this->eventDispatcher->addListener(FixerFileProcessedEvent::NAME, [$progressOutput, 'onFixerFileProcessed']);
        $this->stopwatch->start('fixFiles');
        $changed = $runner->fix();
        $this->stopwatch->stop('fixFiles');
        $this->eventDispatcher->removeListener(FixerFileProcessedEvent::NAME, [$progressOutput, 'onFixerFileProcessed']);

        $progressOutput->printLegend();

        $fixEvent = $this->stopwatch->getEvent('fixFiles');

        $reportSummary = new ReportSummary(
            $changed,
            \count($finder),
            $fixEvent->getDuration(),
            $fixEvent->getMemory(),
            OutputInterface::VERBOSITY_VERBOSE <= $verbosity,
            $resolver->isDryRun(),
            $output->isDecorated()
        );

        $output->isDecorated()
            ? $output->write($reporter->generate($reportSummary))
            : $output->write($reporter->generate($reportSummary), false, OutputInterface::OUTPUT_RAW);

        $invalidErrors = $this->errorsManager->getInvalidErrors();
        $exceptionErrors = $this->errorsManager->getExceptionErrors();
        $lintErrors = $this->errorsManager->getLintErrors();

        if (null !== $stdErr) {
            $errorOutput = new ErrorOutput($stdErr);

            if (\count($invalidErrors) > 0) {
                $errorOutput->listErrors('linting before fixing', $invalidErrors);
            }

            if (\count($exceptionErrors) > 0) {
                $errorOutput->listErrors('fixing', $exceptionErrors);
            }

            if (\count($lintErrors) > 0) {
                $errorOutput->listErrors('linting after fixing', $lintErrors);
            }
        }

        $exitStatusCalculator = new FixCommandExitStatusCalculator();

        return $exitStatusCalculator->calculate(
            $resolver->isDryRun(),
            \count($changed) > 0,
            \count($invalidErrors) > 0,
            \count($exceptionErrors) > 0,
            \count($lintErrors) > 0
        );
    }

    protected function isDryRun(InputInterface $input): bool
    {
        return $input->getOption('dry-run');
    }
}