<?php
/**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

namespace yii\build\controllers;

use Yii;
use yii\console\Controller;
use yii\helpers\Console;
use yii\helpers\FileHelper;

/**
 * PhpDocController is there to help maintaining PHPDoc annotation in class files
 *
 * @author Carsten Brandt <mail@cebe.cc>
 * @author Alexander Makarov <sam@rmcreative.ru>
 * @since 2.0
 */
class PhpDocController extends Controller
{
    public $defaultAction = 'property';
    /**
     * @var boolean whether to update class docs directly. Setting this to false will just output docs
     * for copy and paste.
     */
    public $updateFiles = true;


    /**
     * Generates `@property` annotations in class files from getters and setters
     *
     * Property description will be taken from getter or setter or from an `@property` annotation
     * in the getters docblock if there is one defined.
     *
     * See https://github.com/yiisoft/yii2/wiki/Core-framework-code-style#documentation for details.
     *
     * @param string $root the directory to parse files from. Defaults to YII_PATH.
     */
    public function actionProperty($root = null)
    {
        $files = $this->findFiles($root);

        $nFilesTotal = 0;
        $nFilesUpdated = 0;
        foreach ($files as $file) {
            $result = $this->generateClassPropertyDocs($file);
            if ($result !== false) {
                list($className, $phpdoc) = $result;
                if ($this->updateFiles) {
                    if ($this->updateClassPropertyDocs($file, $className, $phpdoc)) {
                        $nFilesUpdated++;
                    }
                } elseif (!empty($phpdoc)) {
                    $this->stdout("\n[ " . $file . " ]\n\n", Console::BOLD);
                    $this->stdout($phpdoc);
                }
            }
            $nFilesTotal++;
        }

        $this->stdout("\nParsed $nFilesTotal files.\n");
        $this->stdout("Updated $nFilesUpdated files.\n");
    }

    /**
     * Fix some issues with PHPdoc in files
     *
     * @param string $root the directory to parse files from. Defaults to YII_PATH.
     */
    public function actionFix($root = null)
    {
        $files = $this->findFiles($root);

        $nFilesTotal = 0;
        $nFilesUpdated = 0;
        foreach ($files as $file) {
            $contents = file_get_contents($file);
            $sha = sha1($contents);

            // fix line endings
            $lines = preg_split('/(\r\n|\n|\r)/', $contents);

            $this->fixFileDoc($lines);
            $this->fixDocBlockIndentation($lines);

            $newContent = implode("\n", $lines);
            if ($sha !== sha1($newContent)) {
                $nFilesUpdated++;
            }
            file_put_contents($file, $newContent);
            $nFilesTotal++;
        }

        $this->stdout("\nParsed $nFilesTotal files.\n");
        $this->stdout("Updated $nFilesUpdated files.\n");

    }

    /**
     * @inheritdoc
     */
    public function options($actionId)
    {
        return array_merge(parent::options($actionId), ['updateFiles']);
    }

    protected function findFiles($root)
    {
        $except = [];
        if ($root === null) {
            $root = dirname(YII_PATH);
            $extensionPath = "$root/extensions";
            foreach (scandir($extensionPath) as $extension) {
                if (ctype_alpha($extension) && is_dir($extensionPath . '/' . $extension)) {
                    Yii::setAlias("@yii/$extension", "$extensionPath/$extension");
                }
            }

            $except = [
                '.git/',
                '/apps/',
                '/build/',
                '/docs/',
                '/extensions/apidoc/helpers/PrettyPrinter.php',
                '/extensions/apidoc/helpers/ApiIndexer.php',
                '/extensions/codeception/TestCase.php',
                '/extensions/codeception/DbTestCase.php',
                '/extensions/composer/',
                '/extensions/gii/components/DiffRendererHtmlInline.php',
                '/extensions/gii/generators/extension/default/*',
                '/extensions/twig/TwigSimpleFileLoader.php',
                '/framework/BaseYii.php',
                '/framework/Yii.php',
                'assets/',
                'tests/',
                'vendor/',
            ];
        }
        $root = FileHelper::normalizePath($root);
        $options = [
            'filter' => function ($path) {
                    if (is_file($path)) {
                        $file = basename($path);
                        if ($file[0] < 'A' || $file[0] > 'Z') {
                            return false;
                        }
                    }

                    return null;
                },
            'only' => ['*.php'],
            'except' => array_merge($except, [
                'views/',
                'requirements/',
                'gii/generators/',
                'vendor/',
            ]),
        ];
        return FileHelper::findFiles($root, $options);
    }

    protected function fixFileDoc(&$lines)
    {
        // find namespace
        $namespace = false;
        $namespaceLine = '';
        $contentAfterNamespace = false;
        foreach($lines as $i => $line) {
            if (substr(trim($line), 0, 9) === 'namespace') {
                $namespace = $i;
                $namespaceLine = trim($line);
            } elseif ($namespace !== false && trim($line) !== '') {
                $contentAfterNamespace = $i;
                break;
            }
        }

        if ($namespace !== false && $contentAfterNamespace !== false) {
            while($contentAfterNamespace > 0) {
                array_shift($lines);
                $contentAfterNamespace--;
            }
            $lines = array_merge([
                "<?php",
                "/**",
                " * @link http://www.yiiframework.com/",
                " * @copyright Copyright (c) 2008 Yii Software LLC",
                " * @license http://www.yiiframework.com/license/",
                " */",
                "",
                $namespaceLine,
                ""
            ], $lines);
        }
    }

    /**
     * Markdown aware fix of whitespace issues in doc comments
     */
    protected function fixDocBlockIndentation(&$lines)
    {
        $docBlock = false;
        $codeBlock = false;
        $listIndent = '';
        $tag = false;
        $indent = '';
        foreach($lines as $i => $line) {
            if (preg_match('~^(\s*)/\*\*$~', $line, $matches)) {
                $docBlock = true;
                $indent = $matches[1];
            } elseif (preg_match('~^(\s*)\*+/~', $line)) {
                if ($docBlock) { // could be the end of normal comment
                    $lines[$i] = $indent . ' */';
                }
                $docBlock = false;
                $codeBlock = false;
                $listIndent = '';
                $tag = false;
            } elseif ($docBlock) {
                $line = ltrim($line);
                if (isset($line[0]) && $line[0] === '*') {
                    $line = substr($line, 1);
                }
                if (isset($line[0]) && $line[0] === ' ') {
                    $line = substr($line, 1);
                }
                $docLine = str_replace("\t", '    ', rtrim($line));
                if (empty($docLine)) {
                    $listIndent = '';
                } elseif ($docLine[0] === '@') {
                    $listIndent = '';
                    $codeBlock = false;
                    $tag = true;
                    $docLine = preg_replace('/\s+/', ' ', $docLine);
                } elseif (preg_match('/^(~~~|```)/', $docLine)) {
                    $codeBlock = !$codeBlock;
                    $listIndent = '';
                } elseif (preg_match('/^(\s*)([0-9]+\.|-|\*|\+) /', $docLine, $matches)) {
                    $listIndent = str_repeat(' ', strlen($matches[0]));
                    $tag = false;
                    $lines[$i] = $indent . ' * ' . $docLine;
                    continue;
                }
                if ($codeBlock) {
                    $lines[$i] = rtrim($indent . ' * ' . $docLine);
                } else {
                    $lines[$i] = rtrim($indent . ' * ' . (empty($listIndent) && !$tag ? $docLine : ($listIndent . ltrim($docLine))));
                }
            }
        }
    }

    protected function updateClassPropertyDocs($file, $className, $propertyDoc)
    {
        $ref = new \ReflectionClass($className);
        if ($ref->getFileName() != $file) {
            $this->stderr("[ERR] Unable to create ReflectionClass for class: $className loaded class is not from file: $file\n", Console::FG_RED);
        }

        if (!$ref->isSubclassOf('yii\base\Object') && $className != 'yii\base\Object') {
            $this->stderr("[INFO] Skipping class $className as it is not a subclass of yii\\base\\Object.\n", Console::FG_BLUE, Console::BOLD);

            return false;
        }

        $oldDoc = $ref->getDocComment();
        $newDoc = $this->cleanDocComment($this->updateDocComment($oldDoc, $propertyDoc));

        $seenSince = false;
        $seenAuthor = false;

        // TODO move these checks to different action
        $lines = explode("\n", $newDoc);
        if (trim($lines[1]) == '*' || substr(trim($lines[1]), 0, 3) == '* @') {
            $this->stderr("[WARN] Class $className has no short description.\n", Console::FG_YELLOW, Console::BOLD);
        }
        foreach ($lines as $line) {
            if (substr(trim($line), 0, 9) == '* @since ') {
                $seenSince = true;
            } elseif (substr(trim($line), 0, 10) == '* @author ') {
                $seenAuthor = true;
            }
        }

        if (!$seenSince) {
            $this->stderr("[ERR] No @since found in class doc in file: $file\n", Console::FG_RED);
        }
        if (!$seenAuthor) {
            $this->stderr("[ERR] No @author found in class doc in file: $file\n", Console::FG_RED);
        }

        if (trim($oldDoc) != trim($newDoc)) {

            $fileContent = explode("\n", file_get_contents($file));
            $start = $ref->getStartLine() - 2;
            $docStart = $start - count(explode("\n", $oldDoc)) + 1;

            $newFileContent = [];
            $n = count($fileContent);
            for ($i = 0; $i < $n; $i++) {
                if ($i > $start || $i < $docStart) {
                    $newFileContent[] = $fileContent[$i];
                } else {
                    $newFileContent[] = trim($newDoc);
                    $i = $start;
                }
            }

            file_put_contents($file, implode("\n", $newFileContent));

            return true;
        }

        return false;
    }

    /**
     * remove multi empty lines and trim trailing whitespace
     *
     * @param $doc
     * @return string
     */
    protected function cleanDocComment($doc)
    {
        $lines = explode("\n", $doc);
        $n = count($lines);
        for ($i = 0; $i < $n; $i++) {
            $lines[$i] = rtrim($lines[$i]);
            if (trim($lines[$i]) == '*' && trim($lines[$i + 1]) == '*') {
                unset($lines[$i]);
            }
        }

        return implode("\n", $lines);
    }

    /**
     * Replace property annotations in doc comment
     * @param $doc
     * @param $properties
     * @return string
     */
    protected function updateDocComment($doc, $properties)
    {
        $lines = explode("\n", $doc);
        $propertyPart = false;
        $propertyPosition = false;
        foreach ($lines as $i => $line) {
            if (substr(trim($line), 0, 12) == '* @property ') {
                $propertyPart = true;
            } elseif ($propertyPart && trim($line) == '*') {
                $propertyPosition = $i;
                $propertyPart = false;
            }
            if (substr(trim($line), 0, 10) == '* @author ' && $propertyPosition === false) {
                $propertyPosition = $i - 1;
                $propertyPart = false;
            }
            if ($propertyPart) {
                unset($lines[$i]);
            }
        }
        $finalDoc = '';
        foreach ($lines as $i => $line) {
            $finalDoc .= $line . "\n";
            if ($i == $propertyPosition) {
                $finalDoc .= $properties;
            }
        }

        return $finalDoc;
    }

    protected function generateClassPropertyDocs($fileName)
    {
        $phpdoc = "";
        $file = str_replace("\r", "", str_replace("\t", " ", file_get_contents($fileName, true)));
        $ns = $this->match('#\nnamespace (?<name>[\w\\\\]+);\n#', $file);
        $namespace = reset($ns);
        $namespace = $namespace['name'];
        $classes = $this->match('#\n(?:abstract )?class (?<name>\w+)( extends .+)?( implements .+)?\n\{(?<content>.*)\n\}(\n|$)#', $file);

        if (count($classes) > 1) {
            $this->stderr("[ERR] There should be only one class in a file: $fileName\n", Console::FG_RED);

            return false;
        }
        if (count($classes) < 1) {
            $interfaces = $this->match('#\ninterface (?<name>\w+)( extends .+)?\n\{(?<content>.+)\n\}(\n|$)#', $file);
            if (count($interfaces) == 1) {
                return false;
            } elseif (count($interfaces) > 1) {
                $this->stderr("[ERR] There should be only one interface in a file: $fileName\n", Console::FG_RED);
            } else {
                $traits = $this->match('#\ntrait (?<name>\w+)\n\{(?<content>.+)\n\}(\n|$)#', $file);
                if (count($traits) == 1) {
                    return false;
                } elseif (count($traits) > 1) {
                    $this->stderr("[ERR] There should be only one class/trait/interface in a file: $fileName\n", Console::FG_RED);
                } else {
                    $this->stderr("[ERR] No class in file: $fileName\n", Console::FG_RED);
                }
            }

            return false;
        }

        $className = null;
        foreach ($classes as &$class) {

            $className = $namespace . '\\' . $class['name'];

            $gets = $this->match(
                '#\* @return (?<type>[\w\\|\\\\\\[\\]]+)(?: (?<comment>(?:(?!\*/|\* @).)+?)(?:(?!\*/).)+|[\s\n]*)\*/' .
                '[\s\n]{2,}public function (?<kind>get)(?<name>\w+)\((?:,? ?\$\w+ ?= ?[^,]+)*\)#',
                $class['content'], true);
            $sets = $this->match(
                '#\* @param (?<type>[\w\\|\\\\\\[\\]]+) \$\w+(?: (?<comment>(?:(?!\*/|\* @).)+?)(?:(?!\*/).)+|[\s\n]*)\*/' .
                '[\s\n]{2,}public function (?<kind>set)(?<name>\w+)\(\$\w+(?:, ?\$\w+ ?= ?[^,]+)*\)#',
                $class['content'], true);
            // check for @property annotations in getter and setter
            $properties = $this->match(
                '#\* @(?<kind>property) (?<type>[\w\\|\\\\\\[\\]]+)(?: (?<comment>(?:(?!\*/|\* @).)+?)(?:(?!\*/).)+|[\s\n]*)\*/' .
                '[\s\n]{2,}public function [g|s]et(?<name>\w+)\(((?:,? ?\$\w+ ?= ?[^,]+)*|\$\w+(?:, ?\$\w+ ?= ?[^,]+)*)\)#',
                $class['content']);
            $acrs = array_merge($properties, $gets, $sets);

            $props = [];
            foreach ($acrs as &$acr) {
                $acr['name'] = lcfirst($acr['name']);
                $acr['comment'] = trim(preg_replace('#(^|\n)\s+\*\s?#', '$1 * ', $acr['comment']));
                $props[$acr['name']][$acr['kind']] = [
                    'type' => $acr['type'],
                    'comment' => $this->fixSentence($acr['comment']),
                ];
            }

            ksort($props);

            if (count($props) > 0) {
                $phpdoc .= " *\n";
                foreach ($props as $propName => &$prop) {
                    $docline = ' * @';
                    $docline .= 'property'; // Do not use property-read and property-write as few IDEs support complex syntax.
                    $note = '';
                    if (isset($prop['get']) && isset($prop['set'])) {
                        if ($prop['get']['type'] != $prop['set']['type']) {
                            $note = ' Note that the type of this property differs in getter and setter.'
                                  . ' See [[get' . ucfirst($propName) . '()]] and [[set' . ucfirst($propName) . '()]] for details.';
                        }
                    } elseif (isset($prop['get'])) {
                        // check if parent class has setter defined
                        $c = $className;
                        $parentSetter = false;
                        while ($parent = get_parent_class($c)) {
                            if (method_exists($parent, 'set' . ucfirst($propName))) {
                                $parentSetter = true;
                                break;
                            }
                            $c = $parent;
                        }
                        if (!$parentSetter) {
                            $note = ' This property is read-only.';
//							$docline .= '-read';
                        }
                    } elseif (isset($prop['set'])) {
                        // check if parent class has getter defined
                        $c = $className;
                        $parentGetter = false;
                        while ($parent = get_parent_class($c)) {
                            if (method_exists($parent, 'set' . ucfirst($propName))) {
                                $parentGetter = true;
                                break;
                            }
                            $c = $parent;
                        }
                        if (!$parentGetter) {
                            $note = ' This property is write-only.';
//							$docline .= '-write';
                        }
                    } else {
                        continue;
                    }
                    $docline .= ' ' . $this->getPropParam($prop, 'type') . " $$propName ";
                    $comment = explode("\n", $this->getPropParam($prop, 'comment') . $note);
                    foreach ($comment as &$cline) {
                        $cline = ltrim($cline, '* ');
                    }
                    $docline = wordwrap($docline . implode(' ', $comment), 110, "\n * ") . "\n";

                    $phpdoc .= $docline;
                }
                $phpdoc .= " *\n";
            }
        }

        return [$className, $phpdoc];
    }

    protected function match($pattern, $subject, $split = false)
    {
        $sets = [];
        // split subject by double newlines because regex sometimes has problems with matching
        // in the complete set of methods
        // example: yii\di\ServiceLocator setComponents() is not recognized in the whole but in
        // a part of the class.
        $parts = $split ? explode("\n\n", $subject) : [$subject];
        foreach($parts as $part) {
            preg_match_all($pattern . 'suU', $part, $matches, PREG_SET_ORDER);
            foreach ($matches as &$set) {
                foreach ($set as $i => $match)
                    if (is_numeric($i) /*&& $i != 0*/)
                        unset($set[$i]);

                $sets[] = $set;
            }
        }
        return $sets;
    }

    protected function fixSentence($str)
    {
        // TODO fix word wrap
        if ($str == '')
            return '';
        return strtoupper(substr($str, 0, 1)) . substr($str, 1) . ($str[strlen($str) - 1] != '.' ? '.' : '');
    }

    protected function getPropParam($prop, $param)
    {
        return isset($prop['property']) ? $prop['property'][$param] : (isset($prop['get']) ? $prop['get'][$param] : $prop['set'][$param]);
    }
}
