<?php

namespace mageekguy\atoum\test;

use mageekguy\atoum;
use mageekguy\atoum\fs\path;
use mageekguy\atoum\template;

class generator
{
    protected $templatesDirectory = '';
    protected $testedClassesDirectory = null;
    protected $testedClassNamespace = null;
    protected $testClassesDirectory = null;
    protected $testClassNamespace = null;
    protected $testedClassPathExtractor = null;
    protected $fullyQualifiedTestClassNameExtractor = null;
    protected $fullyQualifiedTestedClassNameExtractor = null;
    protected $runnerPath = null;
    protected $templateParser = null;
    protected $pathFactory = null;
    protected $adapter = null;

    public function __construct()
    {
        $this
            ->setTemplatesDirectory()
            ->setTemplateParser()
            ->setPathFactory()
            ->setAdapter()
            ->setFullyQualifiedTestClassNameExtractor()
            ->setFullyQualifiedTestedClassNameExtractor()
            ->setTestedClassPathExtractor()
        ;
    }

    public function setTemplatesDirectory($directory = null)
    {
        $this->templatesDirectory = $directory ?: atoum\directory . DIRECTORY_SEPARATOR . 'resources' . DIRECTORY_SEPARATOR . 'templates' . DIRECTORY_SEPARATOR . 'test' . DIRECTORY_SEPARATOR . 'generator';

        return $this;
    }

    public function getTemplatesDirectory()
    {
        return $this->templatesDirectory;
    }

    public function setTestedClassesDirectory($directory)
    {
        $this->testedClassesDirectory = self::cleanDirectory($directory);

        return $this;
    }

    public function getTestedClassesDirectory()
    {
        return $this->testedClassesDirectory;
    }

    public function setTestClassesDirectory($directory)
    {
        $this->testClassesDirectory = self::cleanDirectory($directory);

        return $this;
    }

    public function getTestClassesDirectory()
    {
        return $this->testClassesDirectory;
    }

    public function setRunnerPath($path)
    {
        $this->runnerPath = $path;

        return $this;
    }

    public function getRunnerPath()
    {
        return $this->runnerPath;
    }

    public function setTemplateParser(template\parser $parser = null)
    {
        $this->templateParser = $parser ?: new template\parser();

        return $this;
    }

    public function getTemplateParser()
    {
        return $this->templateParser;
    }

    public function setPathFactory(path\factory $factory = null)
    {
        $this->pathFactory = $factory ?: new path\factory();

        return $this;
    }

    public function getPathFactory()
    {
        return $this->pathFactory;
    }

    public function setAdapter(atoum\adapter $adapter = null)
    {
        $this->adapter = $adapter ?: new atoum\adapter();

        return $this;
    }

    public function getAdapter()
    {
        return $this->adapter;
    }

    public function setTestedClassNamespace($namespace)
    {
        $this->testedClassNamespace = self::cleanNamespace($namespace);

        return $this;
    }

    public function getTestedClassNamespace()
    {
        return $this->testedClassNamespace;
    }

    public function setTestClassNamespace($namespace)
    {
        $this->testClassNamespace = self::cleanNamespace($namespace);

        return $this;
    }

    public function getTestClassNamespace()
    {
        return $this->testClassNamespace;
    }

    public function setFullyQualifiedTestClassNameExtractor(\closure $extractor = null)
    {
        $this->fullyQualifiedTestClassNameExtractor = $extractor ?: function ($generator, $relativeTestClassPath) {
            return $generator->getTestClassNamespace() . str_replace(DIRECTORY_SEPARATOR, '\\', substr($relativeTestClassPath, 0, -4));
        };

        return $this;
    }

    public function getFullyQualifiedTestClassNameExtractor()
    {
        return $this->fullyQualifiedTestClassNameExtractor;
    }

    public function setFullyQualifiedTestedClassNameExtractor(\closure $extractor = null)
    {
        $this->fullyQualifiedTestedClassNameExtractor = $extractor ?: function ($generator, $fullyQualifiedTestClassName) {
            return $generator->getTestedClassNamespace() . substr($fullyQualifiedTestClassName, strlen($generator->getTestClassNamespace()));
        };

        return $this;
    }

    public function getFullyQualifiedTestedClassNameExtractor()
    {
        return $this->fullyQualifiedTestedClassNameExtractor;
    }

    public function setTestedClassPathExtractor(\closure $extractor = null)
    {
        $this->testedClassPathExtractor = $extractor ?: function ($generator, $fullyQualifiedTestedClassName) {
            return $generator->getTestedClassesDirectory() . substr(str_replace('\\', DIRECTORY_SEPARATOR, $fullyQualifiedTestedClassName), strlen($generator->getTestedClassNamespace())) . '.php';
        };

        return $this;
    }

    public function getTestedClassPathExtractor()
    {
        return $this->testedClassPathExtractor;
    }

    public function generate($testClassPath)
    {
        if ($this->testedClassesDirectory === null) {
            throw new generator\exception('Tested classes directory is undefined');
        }

        if ($this->testClassesDirectory === null) {
            throw new generator\exception('Tests directory is undefined');
        }

        if ($this->testedClassNamespace === null) {
            throw new generator\exception('Tested class namespace is undefined');
        }

        if ($this->testClassNamespace === null) {
            throw new generator\exception('Test class namespace is undefined');
        }

        $testClassesDirectory = $this->pathFactory->build($this->testClassesDirectory);

        if ($testClassesDirectory->exists() === false) {
            throw new generator\exception('Test classes directory \'' . $testClassesDirectory . '\' does not exist');
        }

        $realTestClassesDirectory = $testClassesDirectory->getRealPath();
        $realTestClassPath = $this->pathFactory->build($testClassPath)->getRealPath();
        $realTestClassBaseDirectory = $realTestClassPath->getRealParentDirectoryPath();

        if ((string) $realTestClassesDirectory !== (string) $realTestClassBaseDirectory && $realTestClassBaseDirectory->isSubPathOf($realTestClassesDirectory) === false) {
            throw new generator\exception('Path \'' . $testClassPath . '\' is not in directory \'' . $this->testClassesDirectory . '\'');
        }

        $realTestClassRelativePath = substr($realTestClassPath->getRelativePathFrom($realTestClassesDirectory), 2);

        $fullyQualifiedTestClassName = call_user_func_array($this->fullyQualifiedTestClassNameExtractor, [$this, $realTestClassRelativePath]);

        $testClassTemplate = $this->templateParser->parseFile($this->templatesDirectory . DIRECTORY_SEPARATOR . 'testClass.php');

        $testClassTemplate->fullyQualifiedTestClassName = $fullyQualifiedTestClassName;
        $testClassTemplate->testClassName = self::getShortClassName($fullyQualifiedTestClassName);
        $testClassTemplate->testClassNamespace = self::getClassNamespace($fullyQualifiedTestClassName);

        if ($this->runnerPath !== null) {
            $runnerPath = $this->pathFactory->build($this->runnerPath);
            $relativeRunnerPath = $runnerPath->relativizeFrom($realTestClassBaseDirectory);

            $testClassTemplate->requireRunner->relativeRunnerPath = $relativeRunnerPath;
            $testClassTemplate->requireRunner->build();
        }

        $fullyQualifiedTestedClassName = call_user_func_array($this->fullyQualifiedTestedClassNameExtractor, [$this, $fullyQualifiedTestClassName]);

        if ($this->adapter->class_exists($fullyQualifiedTestedClassName) === false) {
            $testClassTemplate->testMethods->testMethod->methodName = '__construct';
            $testClassTemplate->testMethods->testMethod->methodName->build();
            $testClassTemplate->testMethods->testMethod->build();

            $testedClassPath = $this->pathFactory->build(call_user_func_array($this->testedClassPathExtractor, [$this, $fullyQualifiedTestedClassName]));

            $testedClassTemplate = $this->templateParser->parseFile($this->templatesDirectory . DIRECTORY_SEPARATOR . 'testedClass.php');

            $testedClassTemplate->testedClassName = self::getShortClassName($fullyQualifiedTestedClassName);
            $testedClassTemplate->testedClassNamespace = self::getClassNamespace($fullyQualifiedTestedClassName);

            $testedClassPath->putContents($testedClassTemplate->build());
        } else {
            $testedClass = new \reflectionClass($fullyQualifiedTestedClassName);

            foreach ($testedClass->getMethods(\reflectionMethod::IS_PUBLIC) as $publicMethod) {
                $testClassTemplate->testMethods->testMethod->methodName = $publicMethod->getName();
                $testClassTemplate->testMethods->testMethod->methodName->build();
                $testClassTemplate->testMethods->testMethod->build();
            }
        }

        $testClassTemplate->testMethods->build();

        $realTestClassPath->putContents($testClassTemplate->build());

        return $this;
    }

    protected function saveClassInFile($class, $file)
    {
        if (@$this->adapter->file_put_contents($file, $class) === false) {
            throw new generator\exception('Unable to write in file \'' . $file . '\'');
        }

        return $this;
    }

    protected static function cleanDirectory($path)
    {
        return rtrim($path, DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR;
    }

    protected static function cleanNamespace($namespace)
    {
        return trim($namespace, '\\') . '\\';
    }

    protected static function getShortClassName($fullyQualifiedClassName)
    {
        return basename(str_replace('\\', DIRECTORY_SEPARATOR, $fullyQualifiedClassName));
    }

    protected static function getClassNamespace($fullyQualifiedClassName)
    {
        return str_replace(DIRECTORY_SEPARATOR, '\\', dirname(str_replace('\\', DIRECTORY_SEPARATOR, $fullyQualifiedClassName)));
    }
}