<?php

/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2020 Open Source Matters, Inc. <https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\CMS\Console;

use Joomla\CMS\Factory;
use Joomla\CMS\Language\Text;
use Joomla\Console\Command\AbstractCommand;
use Joomla\Database\DatabaseDriver;
use Joomla\Registry\Registry;
use Symfony\Component\Console\Input\Input;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Style\SymfonyStyle;

// phpcs:disable PSR1.Files.SideEffects
\defined('JPATH_PLATFORM') or die;
// phpcs:enable PSR1.Files.SideEffects

/**
 * Console command Setting Configuration options
 *
 * @since  4.0.0
 */
class SetConfigurationCommand extends AbstractCommand
{
    /**
     * The default command name
     *
     * @var    string
     * @since  4.0.0
     */
    protected static $defaultName = 'config:set';

    /**
     * Stores the Input Object
     * @var Input
     * @since 4.0.0
     */
    private $cliInput;

    /**
     * SymfonyStyle Object
     * @var SymfonyStyle
     * @since 4.0.0
     */
    private $ioStyle;

    /**
     * Options Array
     * @var array
     * @since 4.0.0
     */
    private $options;


    /**
     * Return code if configuration is set successfully
     * @since 4.0.0
     */
    public const CONFIG_SET_SUCCESSFUL = 0;

    /**
     * Return code if configuration set failed
     * @since 4.0.0
     */
    public const CONFIG_SET_FAILED = 1;

    /**
     * Return code if config validation failed
     * @since 4.0.0
     */
    public const CONFIG_VALIDATION_FAILED = 2;

    /**
     * Return code if options are wrong
     * @since 4.0.0
     */
    public const CONFIG_OPTIONS_WRONG = 3;

    /**
     * Return code if database validation failed
     * @since 4.0.0
     */
    public const DB_VALIDATION_FAILED = 4;

    /**
     * Configures the IO
     *
     * @param   InputInterface   $input   Console Input
     * @param   OutputInterface  $output  Console Output
     *
     * @return void
     *
     * @since 4.0.0
     *
     */
    private function configureIO(InputInterface $input, OutputInterface $output)
    {
        $language = Factory::getLanguage();
        $language->load('', JPATH_INSTALLATION, null, false, false) ||
        $language->load('', JPATH_INSTALLATION, null, true);
        $language->load('com_config', JPATH_ADMINISTRATOR, null, false, false) ||
        $language->load('com_config', JPATH_ADMINISTRATOR, null, true);
        $this->cliInput = $input;
        $this->ioStyle = new SymfonyStyle($input, $output);
    }

    /**
     * Collects options from user input
     *
     * @param   array  $options  Options input by users
     *
     * @return boolean
     *
     * @since 4.0.0
     */
    private function retrieveOptionsFromInput(array $options): bool
    {
        $collected = [];

        foreach ($options as $option) {
            if (strpos($option, '=') === false) {
                $this->ioStyle->error('Options and values should be separated by "="');

                return false;
            }

            list($option, $value) = explode('=', $option);

            $collected[$option] = $value;
        }

        $this->options = $collected;

        return true;
    }

    /**
     * Validates the options provided
     *
     * @return boolean
     *
     * @since 4.0.0
     */
    private function validateOptions(): bool
    {
        $config = $this->getInitialConfigurationOptions();

        $configs = $config->toArray();

        $valid = true;
        array_walk(
            $this->options,
            function ($value, $key) use ($configs, &$valid) {
                if (!array_key_exists($key, $configs)) {
                    $this->ioStyle->error("Can't find option *$key* in configuration list");
                    $valid = false;
                }
            }
        );

        return $valid;
    }

    /**
     * Sets the options array
     *
     * @param   string  $options  Options string
     *
     * @since 4.0.0
     *
     * @return void
     */
    public function setOptions($options)
    {
        $this->options = explode(' ', $options);
    }

    /**
     * Collects the options array
     *
     * @return array|mixed
     *
     * @since 4.0.0
     */
    public function getOptions()
    {
        return $this->cliInput->getArgument('options');
    }

    /**
     * Returns Default configuration Object
     *
     * @return Registry
     *
     * @since 4.0.0
     */
    public function getInitialConfigurationOptions(): Registry
    {
        return (new Registry(new \JConfig()));
    }


    /**
     * Save the configuration file
     *
     * @param   array  $options  Options array
     *
     * @return boolean
     *
     * @since 4.0.0
     */
    public function saveConfiguration($options): bool
    {
        $app = $this->getApplication();

        // Check db connection encryption properties
        $model = $app->bootComponent('com_config')->getMVCFactory($app)->createModel('Application', 'Administrator');

        if (!$model->save($options)) {
            $this->ioStyle->error(Text::_('Failed to save properties'));

            return false;
        }

        return true;
    }

    /**
     * Initialise the command.
     *
     * @return void
     *
     * @since 4.0.0
     */
    protected function configure(): void
    {
        $this->addArgument(
            'options',
            InputArgument::REQUIRED | InputArgument::IS_ARRAY,
            'All the options you want to set'
        );

        $help = "<info>%command.name%</info> sets the value for a configuration option
				\nUsage: <info>php %command.full_name%</info> <option>=<value>";

        $this->setDescription('Set a value for a configuration option');
        $this->setHelp($help);
    }

    /**
     * Verifies database connection
     *
     * @param   array  $options  Options array
     *
     * @return boolean|\Joomla\Database\DatabaseInterface
     *
     * @since 4.0.0
     * @throws \Exception
     */
    public function checkDb($options): bool
    {
        // Ensure a database type was selected.
        if (empty($options['dbtype'])) {
            $this->ioStyle->error(Text::_('INSTL_DATABASE_INVALID_TYPE'));

            return false;
        }

        // Ensure that a hostname and user name were input.
        if (empty($options['host']) || empty($options['user'])) {
            $this->ioStyle->error(Text::_('INSTL_DATABASE_INVALID_DB_DETAILS'));

            return false;
        }

        // Validate database table prefix.
        if (isset($options['dbprefix']) && !preg_match('#^[a-zA-Z]+[a-zA-Z0-9_]*$#', $options['dbprefix'])) {
            $this->ioStyle->error(Text::_('INSTL_DATABASE_PREFIX_MSG'));

            return false;
        }

        // Validate length of database table prefix.
        if (isset($options['dbprefix']) && strlen($options['dbprefix']) > 15) {
            $this->ioStyle->error(Text::_('INSTL_DATABASE_FIX_TOO_LONG'), 'warning');

            return false;
        }

        // Validate length of database name.
        if (strlen($options['db']) > 64) {
            $this->ioStyle->error(Text::_('INSTL_DATABASE_NAME_TOO_LONG'));

            return false;
        }

        // Validate database name.
        if (in_array($options['dbtype'], ['pgsql', 'postgresql'], true) && !preg_match('#^[a-zA-Z_][0-9a-zA-Z_$]*$#', $options['db'])) {
            $this->ioStyle->error(Text::_('INSTL_DATABASE_NAME_MSG_POSTGRES'));

            return false;
        }

        if (in_array($options['dbtype'], ['mysql', 'mysqli']) && preg_match('#[\\\\\/]#', $options['db'])) {
            $this->ioStyle->error(Text::_('INSTL_DATABASE_NAME_MSG_MYSQL'));

            return false;
        }

        // Workaround for UPPERCASE table prefix for PostgreSQL
        if (in_array($options['dbtype'], ['pgsql', 'postgresql'])) {
            if (isset($options['dbprefix']) && strtolower($options['dbprefix']) !== $options['dbprefix']) {
                $this->ioStyle->error(Text::_('INSTL_DATABASE_FIX_LOWERCASE'));

                return false;
            }
        }

        $app = $this->getApplication();

        // Check db connection encryption properties
        $model = $app->bootComponent('com_config')->getMVCFactory($app)->createModel('Application', 'Administrator');

        if (!$model->validateDbConnection($options)) {
            $this->ioStyle->error(Text::_('Failed to validate the db connection encryption properties'));

            return false;
        }

        // Build the connection options array.
        $settings = [
            'driver'   => $options['dbtype'],
            'host'     => $options['host'],
            'user'     => $options['user'],
            'password' => $options['password'],
            'database' => $options['db'],
            'prefix'   => $options['dbprefix'],
        ];

        if ((int) $options['dbencryption'] !== 0) {
            $settings['ssl'] = [
                'enable'             => true,
                'verify_server_cert' => (bool) $options['dbsslverifyservercert'],
            ];

            foreach (['cipher', 'ca', 'key', 'cert'] as $value) {
                $confVal = trim($options['dbssl' . $value]);

                if ($confVal !== '') {
                    $settings['ssl'][$value] = $confVal;
                }
            }
        }

        // Get a database object.
        try {
            $db = DatabaseDriver::getInstance($settings);
            $db->getVersion();
        } catch (\Exception $e) {
            $this->ioStyle->error(
                Text::sprintf(
                    'Cannot connect to database, verify that you specified the correct database details %s',
                    $e->getMessage()
                )
            );

            return false;
        }

        if ((int) $options['dbencryption'] !== 0 && empty($db->getConnectionEncryption())) {
            if ($db->isConnectionEncryptionSupported()) {
                $this->ioStyle->error(Text::_('COM_CONFIG_ERROR_DATABASE_ENCRYPTION_CONN_NOT_ENCRYPT'));
            } else {
                $this->ioStyle->error(Text::_('COM_CONFIG_ERROR_DATABASE_ENCRYPTION_SRV_NOT_SUPPORTS'));
            }

            return false;
        }

        return true;
    }

    /**
     * Internal function to execute the command.
     *
     * @param   InputInterface   $input   The input to inject into the command.
     * @param   OutputInterface  $output  The output to inject into the command.
     *
     * @return  integer  The command exit code
     *
     * @since   4.0.0
     * @throws \Exception
     */
    protected function doExecute(InputInterface $input, OutputInterface $output): int
    {
        $this->configureIO($input, $output);

        $options = $this->getOptions();

        if (!$this->retrieveOptionsFromInput($options)) {
            return self::CONFIG_OPTIONS_WRONG;
        }

        if (!$this->validateOptions()) {
            return self::CONFIG_VALIDATION_FAILED;
        }

        $initialOptions = $this->getInitialConfigurationOptions()->toArray();

        $combinedOptions = $this->sanitizeOptions(array_merge($initialOptions, $this->options));

        if (!$this->checkDb($combinedOptions)) {
            return self::DB_VALIDATION_FAILED;
        }

        if ($this->saveConfiguration($combinedOptions)) {
            $this->ioStyle->success('Configuration set');

            return self::CONFIG_SET_SUCCESSFUL;
        }

        return self::CONFIG_SET_FAILED;
    }

    /**
     * Sanitize the options array for boolean
     *
     * @param   array  $options  Options array
     *
     * @return array
     *
     * @since 4.0.0
     */
    public function sanitizeOptions(array $options): array
    {
        foreach ($options as $key => $value) {
            $value = $value === 'false' ? false : $value;
            $value = $value === 'true' ? true : $value;

            $options[$key] = $value;
        }

        return $options;
    }
}