<?php

namespace DeliciousBrains\WP_Offload_SES\Aws3\Aws\ClientSideMonitoring;

use DeliciousBrains\WP_Offload_SES\Aws3\Aws\AbstractConfigurationProvider;
use DeliciousBrains\WP_Offload_SES\Aws3\Aws\CacheInterface;
use DeliciousBrains\WP_Offload_SES\Aws3\Aws\ClientSideMonitoring\Exception\ConfigurationException;
use DeliciousBrains\WP_Offload_SES\Aws3\Aws\ConfigurationProviderInterface;
use DeliciousBrains\WP_Offload_SES\Aws3\GuzzleHttp\Promise;
use DeliciousBrains\WP_Offload_SES\Aws3\GuzzleHttp\Promise\PromiseInterface;
/**
 * A configuration provider is a function that accepts no arguments and returns
 * a promise that is fulfilled with a {@see \Aws\ClientSideMonitoring\ConfigurationInterface}
 * or rejected with an {@see \Aws\ClientSideMonitoring\Exception\ConfigurationException}.
 *
 * <code>
 * use Aws\ClientSideMonitoring\ConfigurationProvider;
 * $provider = ConfigurationProvider::defaultProvider();
 * // Returns a ConfigurationInterface or throws.
 * $config = $provider()->wait();
 * </code>
 *
 * Configuration providers can be composed to create configuration using
 * conditional logic that can create different configurations in different
 * environments. You can compose multiple providers into a single provider using
 * {@see Aws\ClientSideMonitoring\ConfigurationProvider::chain}. This function
 * accepts providers as variadic arguments and returns a new function that will
 * invoke each provider until a successful configuration is returned.
 *
 * <code>
 * // First try an INI file at this location.
 * $a = ConfigurationProvider::ini(null, '/path/to/file.ini');
 * // Then try an INI file at this location.
 * $b = ConfigurationProvider::ini(null, '/path/to/other-file.ini');
 * // Then try loading from environment variables.
 * $c = ConfigurationProvider::env();
 * // Combine the three providers together.
 * $composed = ConfigurationProvider::chain($a, $b, $c);
 * // Returns a promise that is fulfilled with a configuration or throws.
 * $promise = $composed();
 * // Wait on the configuration to resolve.
 * $config = $promise->wait();
 * </code>
 */
class ConfigurationProvider extends AbstractConfigurationProvider implements ConfigurationProviderInterface
{
    const DEFAULT_CLIENT_ID = '';
    const DEFAULT_ENABLED = \false;
    const DEFAULT_HOST = '127.0.0.1';
    const DEFAULT_PORT = 31000;
    const ENV_CLIENT_ID = 'AWS_CSM_CLIENT_ID';
    const ENV_ENABLED = 'AWS_CSM_ENABLED';
    const ENV_HOST = 'AWS_CSM_HOST';
    const ENV_PORT = 'AWS_CSM_PORT';
    const ENV_PROFILE = 'AWS_PROFILE';
    public static $cacheKey = 'aws_cached_csm_config';
    protected static $interfaceClass = ConfigurationInterface::class;
    protected static $exceptionClass = ConfigurationException::class;
    /**
     * Create a default config provider that first checks for environment
     * variables, then checks for a specified profile in the environment-defined
     * config file location (env variable is 'AWS_CONFIG_FILE', file location
     * defaults to ~/.aws/config), then checks for the "default" profile in the
     * environment-defined config file location, and failing those uses a default
     * fallback set of configuration options.
     *
     * This provider is automatically wrapped in a memoize function that caches
     * previously provided config options.
     *
     * @param array $config
     *
     * @return callable
     */
    public static function defaultProvider(array $config = [])
    {
        $configProviders = [self::env()];
        if (!isset($config['use_aws_shared_config_files']) || $config['use_aws_shared_config_files'] != \false) {
            $configProviders[] = self::ini();
        }
        $configProviders[] = self::fallback();
        $memo = self::memoize(call_user_func_array([ConfigurationProvider::class, 'chain'], $configProviders));
        if (isset($config['csm']) && $config['csm'] instanceof CacheInterface) {
            return self::cache($memo, $config['csm'], self::$cacheKey);
        }
        return $memo;
    }
    /**
     * Provider that creates CSM config from environment variables.
     *
     * @return callable
     */
    public static function env()
    {
        return function () {
            // Use credentials from environment variables, if available
            $enabled = getenv(self::ENV_ENABLED);
            if ($enabled !== \false) {
                return Promise\Create::promiseFor(new Configuration($enabled, getenv(self::ENV_HOST) ?: self::DEFAULT_HOST, getenv(self::ENV_PORT) ?: self::DEFAULT_PORT, getenv(self::ENV_CLIENT_ID) ?: self::DEFAULT_CLIENT_ID));
            }
            return self::reject('Could not find environment variable CSM config' . ' in ' . self::ENV_ENABLED . '/' . self::ENV_HOST . '/' . self::ENV_PORT . '/' . self::ENV_CLIENT_ID);
        };
    }
    /**
     * Fallback config options when other sources are not set.
     *
     * @return callable
     */
    public static function fallback()
    {
        return function () {
            return Promise\Create::promiseFor(new Configuration(self::DEFAULT_ENABLED, self::DEFAULT_HOST, self::DEFAULT_PORT, self::DEFAULT_CLIENT_ID));
        };
    }
    /**
     * Config provider that creates config using a config file whose location
     * is specified by an environment variable 'AWS_CONFIG_FILE', defaulting to
     * ~/.aws/config if not specified
     *
     * @param string|null $profile  Profile to use. If not specified will use
     *                              the "default" profile.
     * @param string|null $filename If provided, uses a custom filename rather
     *                              than looking in the default directory.
     *
     * @return callable
     */
    public static function ini($profile = null, $filename = null)
    {
        $filename = $filename ?: self::getDefaultConfigFilename();
        $profile = $profile ?: (getenv(self::ENV_PROFILE) ?: 'aws_csm');
        return function () use ($profile, $filename) {
            if (!@is_readable($filename)) {
                return self::reject("Cannot read CSM config from {$filename}");
            }
            $data = \DeliciousBrains\WP_Offload_SES\Aws3\Aws\parse_ini_file($filename, \true);
            if ($data === \false) {
                return self::reject("Invalid config file: {$filename}");
            }
            if (!isset($data[$profile])) {
                return self::reject("'{$profile}' not found in config file");
            }
            if (!isset($data[$profile]['csm_enabled'])) {
                return self::reject("Required CSM config values not present in\n                    INI profile '{$profile}' ({$filename})");
            }
            // host is optional
            if (empty($data[$profile]['csm_host'])) {
                $data[$profile]['csm_host'] = self::DEFAULT_HOST;
            }
            // port is optional
            if (!filter_var($data[$profile]['csm_port'] ?? null, \FILTER_VALIDATE_INT)) {
                $data[$profile]['csm_port'] = self::DEFAULT_PORT;
            }
            // client_id is optional
            if (empty($data[$profile]['csm_client_id'])) {
                $data[$profile]['csm_client_id'] = self::DEFAULT_CLIENT_ID;
            }
            return Promise\Create::promiseFor(new Configuration($data[$profile]['csm_enabled'], $data[$profile]['csm_host'], $data[$profile]['csm_port'], $data[$profile]['csm_client_id']));
        };
    }
    /**
     * Unwraps a configuration object in whatever valid form it is in,
     * always returning a ConfigurationInterface object.
     *
     * @param  mixed $config
     * @return ConfigurationInterface
     * @throws \InvalidArgumentException
     */
    public static function unwrap($config)
    {
        if (is_callable($config)) {
            $config = $config();
        }
        if ($config instanceof PromiseInterface) {
            $config = $config->wait();
        }
        if ($config instanceof ConfigurationInterface) {
            return $config;
        } elseif (is_array($config) && isset($config['enabled'])) {
            $client_id = isset($config['client_id']) ? $config['client_id'] : self::DEFAULT_CLIENT_ID;
            $host = isset($config['host']) ? $config['host'] : self::DEFAULT_HOST;
            $port = isset($config['port']) ? $config['port'] : self::DEFAULT_PORT;
            return new Configuration($config['enabled'], $host, $port, $client_id);
        }
        throw new \InvalidArgumentException('Not a valid CSM configuration ' . 'argument.');
    }
}
