<?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\Descriptor;

use Symfony\Component\Console\Application;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Formatter\OutputFormatter;
use Symfony\Component\Console\Helper\Helper;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputDefinition;
use Symfony\Component\Console\Input\InputOption;

/**
* Text descriptor.
*
* @author Jean-François Simon <contact@jfsimon.fr>
*
* @internal
*/
class TextDescriptor extends Descriptor
{
/**
* {@inheritdoc}
*/
protected function describeInputArgument(InputArgument $argument, array $options = [])
{
if (null !== $argument->getDefault() && (!\is_array($argument->getDefault()) || \count($argument->getDefault()))) {
$default = sprintf('<comment> [default: %s]</comment>', $this->formatDefaultValue($argument->getDefault()));
} else {
$default = '';
}

$totalWidth = $options['total_width'] ?? Helper::strlen($argument->getName());
$spacingWidth = $totalWidth - \strlen($argument->getName());

$this->writeText(sprintf(' <info>%s</info> %s%s%s',
$argument->getName(),
str_repeat(' ', $spacingWidth),
// + 4 = 2 spaces before <info>, 2 spaces after </info>
preg_replace('/\s*[\r\n]\s*/', "\n".str_repeat(' ', $totalWidth + 4), $argument->getDescription()),
$default
), $options);
}

/**
* {@inheritdoc}
*/
protected function describeInputOption(InputOption $option, array $options = [])
{
if ($option->acceptValue() && null !== $option->getDefault() && (!\is_array($option->getDefault()) || \count($option->getDefault()))) {
$default = sprintf('<comment> [default: %s]</comment>', $this->formatDefaultValue($option->getDefault()));
} else {
$default = '';
}

$value = '';
if ($option->acceptValue()) {
$value = '='.strtoupper($option->getName());

if ($option->isValueOptional()) {
$value = '['.$value.']';
}
}

$totalWidth = $options['total_width'] ?? $this->calculateTotalWidthForOptions([$option]);
$synopsis = sprintf('%s%s',
$option->getShortcut() ? sprintf('-%s, ', $option->getShortcut()) : ' ',
sprintf('--%s%s', $option->getName(), $value)
);

$spacingWidth = $totalWidth - Helper::strlen($synopsis);

$this->writeText(sprintf(' <info>%s</info> %s%s%s%s',
$synopsis,
str_repeat(' ', $spacingWidth),
// + 4 = 2 spaces before <info>, 2 spaces after </info>
preg_replace('/\s*[\r\n]\s*/', "\n".str_repeat(' ', $totalWidth + 4), $option->getDescription()),
$default,
$option->isArray() ? '<comment> (multiple values allowed)</comment>' : ''
), $options);
}

/**
* {@inheritdoc}
*/
protected function describeInputDefinition(InputDefinition $definition, array $options = [])
{
$totalWidth = $this->calculateTotalWidthForOptions($definition->getOptions());
foreach ($definition->getArguments() as $argument) {
$totalWidth = max($totalWidth, Helper::strlen($argument->getName()));
}

if ($definition->getArguments()) {
$this->writeText('<comment>Arguments:</comment>', $options);
$this->writeText("\n");
foreach ($definition->getArguments() as $argument) {
$this->describeInputArgument($argument, array_merge($options, ['total_width' => $totalWidth]));
$this->writeText("\n");
}
}

if ($definition->getArguments() && $definition->getOptions()) {
$this->writeText("\n");
}

if ($definition->getOptions()) {
$laterOptions = [];

$this->writeText('<comment>Options:</comment>', $options);
foreach ($definition->getOptions() as $option) {
if (\strlen($option->getShortcut() ?? '') > 1) {
$laterOptions[] = $option;
continue;
}
$this->writeText("\n");
$this->describeInputOption($option, array_merge($options, ['total_width' => $totalWidth]));
}
foreach ($laterOptions as $option) {
$this->writeText("\n");
$this->describeInputOption($option, array_merge($options, ['total_width' => $totalWidth]));
}
}
}

/**
* {@inheritdoc}
*/
protected function describeCommand(Command $command, array $options = [])
{
$command->getSynopsis(true);
$command->getSynopsis(false);
$command->mergeApplicationDefinition(false);

if ($description = $command->getDescription()) {
$this->writeText('<comment>Description:</comment>', $options);
$this->writeText("\n");
$this->writeText(' '.$description);
$this->writeText("\n\n");
}

$this->writeText('<comment>Usage:</comment>', $options);
foreach (array_merge([$command->getSynopsis(true)], $command->getAliases(), $command->getUsages()) as $usage) {
$this->writeText("\n");
$this->writeText(' '.OutputFormatter::escape($usage), $options);
}
$this->writeText("\n");

$definition = $command->getNativeDefinition();
if ($definition->getOptions() || $definition->getArguments()) {
$this->writeText("\n");
$this->describeInputDefinition($definition, $options);
$this->writeText("\n");
}

$help = $command->getProcessedHelp();
if ($help && $help !== $description) {
$this->writeText("\n");
$this->writeText('<comment>Help:</comment>', $options);
$this->writeText("\n");
$this->writeText(' '.str_replace("\n", "\n ", $help), $options);
$this->writeText("\n");
}
}

/**
* {@inheritdoc}
*/
protected function describeApplication(Application $application, array $options = [])
{
$describedNamespace = $options['namespace'] ?? null;
$description = new ApplicationDescription($application, $describedNamespace);

if (isset($options['raw_text']) && $options['raw_text']) {
$width = $this->getColumnWidth($description->getCommands());

foreach ($description->getCommands() as $command) {
$this->writeText(sprintf("%-{$width}s %s", $command->getName(), $command->getDescription()), $options);
$this->writeText("\n");
}
} else {
if ('' != $help = $application->getHelp()) {
$this->writeText("$help\n\n", $options);
}

$this->writeText("<comment>Usage:</comment>\n", $options);
$this->writeText(" command [options] [arguments]\n\n", $options);

$this->describeInputDefinition(new InputDefinition($application->getDefinition()->getOptions()), $options);

$this->writeText("\n");
$this->writeText("\n");

$commands = $description->getCommands();
$namespaces = $description->getNamespaces();
if ($describedNamespace && $namespaces) {
// make sure all alias commands are included when describing a specific namespace
$describedNamespaceInfo = reset($namespaces);
foreach ($describedNamespaceInfo['commands'] as $name) {
$commands[$name] = $description->getCommand($name);
}
}

// calculate max. width based on available commands per namespace
$width = $this->getColumnWidth(array_merge(...array_values(array_map(function ($namespace) use ($commands) {
return array_intersect($namespace['commands'], array_keys($commands));
}, array_values($namespaces)))));

if ($describedNamespace) {
$this->writeText(sprintf('<comment>Available commands for the "%s" namespace:</comment>', $describedNamespace), $options);
} else {
$this->writeText('<comment>Available commands:</comment>', $options);
}

foreach ($namespaces as $namespace) {
$namespace['commands'] = array_filter($namespace['commands'], function ($name) use ($commands) {
return isset($commands[$name]);
});

if (!$namespace['commands']) {
continue;
}

if (!$describedNamespace && ApplicationDescription::GLOBAL_NAMESPACE !== $namespace['id']) {
$this->writeText("\n");
$this->writeText(' <comment>'.$namespace['id'].'</comment>', $options);
}

foreach ($namespace['commands'] as $name) {
$this->writeText("\n");
$spacingWidth = $width - Helper::strlen($name);
$command = $commands[$name];
$commandAliases = $name === $command->getName() ? $this->getCommandAliasesText($command) : '';
$this->writeText(sprintf(' <info>%s</info>%s%s', $name, str_repeat(' ', $spacingWidth), $commandAliases.$command->getDescription()), $options);
}
}

$this->writeText("\n");
}
}

/**
* {@inheritdoc}
*/
private function writeText(string $content, array $options = [])
{
$this->write(
isset($options['raw_text']) && $options['raw_text'] ? strip_tags($content) : $content,
isset($options['raw_output']) ? !$options['raw_output'] : true
);
}

/**
* Formats command aliases to show them in the command description.
*/
private function getCommandAliasesText(Command $command): string
{
$text = '';
$aliases = $command->getAliases();

if ($aliases) {
$text = '['.implode('|', $aliases).'] ';
}

return $text;
}

/**
* Formats input option/argument default value.
*
* @param mixed $default
*/
private function formatDefaultValue($default): string
{
if (\INF === $default) {
return 'INF';
}

if (\is_string($default)) {
$default = OutputFormatter::escape($default);
} elseif (\is_array($default)) {
foreach ($default as $key => $value) {
if (\is_string($value)) {
$default[$key] = OutputFormatter::escape($value);
}
}
}

return str_replace('\\\\', '\\', json_encode($default, \JSON_UNESCAPED_SLASHES | \JSON_UNESCAPED_UNICODE));
}

/**
* @param array<Command|string> $commands
*/
private function getColumnWidth(array $commands): int
{
$widths = [];

foreach ($commands as $command) {
if ($command instanceof Command) {
$widths[] = Helper::strlen($command->getName());
foreach ($command->getAliases() as $alias) {
$widths[] = Helper::strlen($alias);
}
} else {
$widths[] = Helper::strlen($command);
}
}

return $widths ? max($widths) + 2 : 0;
}

/**
* @param InputOption[] $options
*/
private function calculateTotalWidthForOptions(array $options): int
{
$totalWidth = 0;
foreach ($options as $option) {
// "-" + shortcut + ", --" + name
$nameLength = 1 + max(Helper::strlen($option->getShortcut()), 1) + 4 + Helper::strlen($option->getName());

if ($option->acceptValue()) {
$valueLength = 1 + Helper::strlen($option->getName()); // = + value
$valueLength += $option->isValueOptional() ? 2 : 0; // [ + ]

$nameLength += $valueLength;
}
$totalWidth = max($totalWidth, $nameLength);
}

return $totalWidth;
}
}