#!/usr/bin/env php
<?php

use OpenApi\Analysers\AttributeAnnotationFactory;
use OpenApi\Analysers\DocBlockAnnotationFactory;
use OpenApi\Analysers\ReflectionAnalyser;
use OpenApi\Analysers\TokenAnalyser;
use OpenApi\Annotations\OpenApi;
use OpenApi\Generator;
use OpenApi\Util;
use OpenApi\Loggers\ConsoleLogger;

if (class_exists(Generator::class) === false) {
    if (file_exists(__DIR__.'/../vendor/autoload.php')) {  // cloned / dev environment?
        require_once(__DIR__.'/../vendor/autoload.php');
    } else {
        require_once(realpath(__DIR__.'/../../../').'/autoload.php');
    }
}

error_reporting(E_ALL);

// Possible options and their default values.
$options = [
    'config' => [],
    'legacy' => false,
    'output' => false,
    'format' => 'auto',
    'exclude' => [],
    'pattern' => '*.php',
    'bootstrap' => [],
    'help' => false,
    'debug' => false,
    'processor' => [],
    'version' => null,
];
$aliases = [
    'c' => 'config',
    'l' => 'legacy',
    'o' => 'output',
    'e' => 'exclude',
    'n' => 'pattern',
    'b' => 'bootstrap',
    'h' => 'help',
    'd' => 'debug',
    'p' => 'processor',
    'f' => 'format'
];
$needsArgument = [
    'config',
    'output',
    'format',
    'exclude',
    'pattern',
    'bootstrap',
    'processor',
    'version',
];
$paths = [];
$error = false;

try {
    // Parse cli arguments
    for ($i = 1; $i < $argc; $i++) {
        $arg = $argv[$i];
        if (substr($arg, 0, 2) === '--') { // longopt
            $option = substr($arg, 2);
        } elseif ($arg[0] === '-') { // shortopt
            if (array_key_exists(substr($arg, 1), $aliases)) {
                $option = $aliases[$arg[1]];
            } else {
                throw new Exception('Unknown option: "' . $arg . '"');
            }
        } else {
            $paths[] = $arg;
            continue;
        }
        if (array_key_exists($option, $options) === false) {
            throw new Exception('Unknown option: "' . $arg . '"');
        }
        if (in_array($option, $needsArgument)) {
            if (empty($argv[$i + 1]) || $argv[$i + 1][0] === '-') {
                throw new Exception('Missing argument for "' . $arg . '"');
            }
            if (is_array($options[$option])) {
                $options[$option][] = $argv[$i + 1];
            } else {
                $options[$option] = $argv[$i + 1];
            }
            $i++;
        } else {
            $options[$option] = true;
        }
    }
} catch (\Exception $e) {
    $error = $e->getMessage();
}

$logger = new ConsoleLogger($options['debug']);

if (!$error && $options['bootstrap']) {
    foreach ($options['bootstrap'] as $bootstrap) {
        $filenames = glob($bootstrap);
        if (false === $filenames) {
            $error = 'Invalid `--bootstrap` value: "' . $bootstrap . '"';
            break;
        }
        foreach ($filenames as $filename) {
            if ($options['debug']) {
                $logger->debug('Bootstrapping: ' . $filename);
            }
            require_once($filename);
        }
    }
}
if (count($paths) === 0) {
    $error = 'Specify at least one path.';
}

if ($options['help'] === false && $error) {
    $logger->error('', ['prefix' => '']);
    $logger->error($error);
    // Show help
    $options['help'] = true;
}
$defaultVersion = OpenApi::DEFAULT_VERSION;
if ($options['help']) {
    $help = <<<EOF

Usage: openapi [--option value] [/path/to/project ...]

Options:
  --config (-c)     Generator config
                    ex: -c operationId.hash=false
  --legacy (-l)     Use legacy TokenAnalyser; default is the new ReflectionAnalyser
  --output (-o)     Path to store the generated documentation.
                    ex: --output openapi.yaml
  --exclude (-e)    Exclude path(s).
                    ex: --exclude vendor,library/Zend
  --pattern (-n)    Pattern of files to scan.
                    ex: --pattern "*.php" or --pattern "/\.(phps|php)$/"
  --bootstrap (-b)  Bootstrap php file(s) for defining constants, etc.
                    ex: --bootstrap config/constants.php
  --processor (-p)  Register an additional processor.
  --format (-f)     Force yaml or json.
  --debug (-d)      Show additional error information.
  --version         The OpenAPI version; defaults to {$defaultVersion}.
  --help (-h)       Display this help message.


EOF;
    $logger->info($help);
    exit(1);
}

$errorTypes = [
    E_ERROR => 'Error',
    E_WARNING => 'Warning',
    E_PARSE => 'Parser error',
    E_NOTICE => 'Notice',
    E_STRICT => 'Strict',
    E_DEPRECATED => 'Deprecated',
    E_CORE_ERROR => 'Error(Core)',
    E_CORE_WARNING => 'Warning(Core)',
    E_COMPILE_ERROR => 'Error(compile)',
    E_COMPILE_WARNING => 'Warning(Compile)',
    E_RECOVERABLE_ERROR => 'Error(Recoverable)',
    E_USER_ERROR => 'Error',
    E_USER_WARNING => 'Warning',
    E_USER_NOTICE => 'Notice',
    E_USER_DEPRECATED => 'Deprecated',
];
set_error_handler(function ($errno, $errstr, $file, $line) use ($errorTypes, $options, $logger) {
    if (!(error_reporting() & $errno)) {
        // This error code is not included in error_reporting
        return;
    }
    $type = array_key_exists($errno, $errorTypes) ? $errorTypes[$errno] : 'Error';
    if ($type === 'Deprecated') {
        $logger->info($errstr, ['prefix' => $type . ': ']);
    } else {
        $logger->error($errstr, ['prefix' => $type . ': ']);
    }

    if ($options['debug']) {
        $logger->info(' in '.$file.' on line '.$line);
    }
    if (substr($type, 0, 5) === 'Error') {
        exit($errno);
    }
});

set_exception_handler(function ($exception) use ($logger) {
    $logger->error($exception);
    exit($exception->getCode() ?: 1);
});

$exclude = null;
if ($options['exclude']) {
    $exclude = $options['exclude'];
    if (strpos($exclude[0], ',') !== false) {
        $exploded = explode(',', $exclude[0]);
        $logger->error('Comma-separated exclude paths are deprecated, use multiple --exclude statements: --exclude '.$exploded[0].' --exclude '.$exploded[1]);
        $exclude[0] = array_shift($exploded);
        $exclude = array_merge($exclude, $exploded);
    }
}

$pattern = "*.php";
if ($options['pattern']) {
    $pattern = $options['pattern'];
}

$generator = new Generator($logger);
foreach ($options["processor"] as $processor) {
    $class = '\OpenApi\Processors\\'.$processor;
    if (class_exists($class)) {
        $processor = new $class();
    } elseif (class_exists($processor)) {
        $processor = new $processor();
    }
    $generator->addProcessor($processor);
}

$analyser = $options['legacy']
    ? new TokenAnalyser()
    : new ReflectionAnalyser([new DocBlockAnnotationFactory(), new AttributeAnnotationFactory()]);

$openapi = $generator
    ->setVersion($options['version'])
    ->setConfig($options['config'])
    ->setAnalyser($analyser)
    ->generate(Util::finder($paths, $exclude, $pattern));

if ($options['output'] === false) {
    if (strtolower($options['format']) === 'json') {
        echo $openapi->toJson();
    } else {
        echo $openapi->toYaml();
    }
    echo "\n";
} else {
    if (is_dir($options['output'])) {
        $options['output'] .= '/openapi.yaml';
    }
    $openapi->saveAs($options['output'], $options['format']);
}
exit($logger->loggedMessageAboveNotice() ? 1 : 0);