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<?php declare(strict_types=1);
/*
 * This file is part of the php-code-coverage package.
 *
 * (c) Sebastian Bergmann <sebastian@phpunit.de>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace SebastianBergmann\CodeCoverage\Report\Html;

use SebastianBergmann\CodeCoverage\Node\File as FileNode;
use SebastianBergmann\CodeCoverage\Util;

/**
 * Renders a file node.
 */
final class File extends Renderer
{
    /**
     * @var int
     */
    private $htmlSpecialCharsFlags = \ENT_COMPAT | \ENT_HTML401 | \ENT_SUBSTITUTE;

/**
     * @throws \RuntimeException
     */
    public function render(FileNode $node, string $file): void
    {
        $template = new \Text_Template($this->templatePath . 'file.html', '{{', '}}');

$template->setVar(
            [
                'items' => $this->renderItems($node),
                'lines' => $this->renderSource($node),
            ]
        );

$this->setCommonTemplateVariables($template, $node);

$template->renderTo($file);
    }

protected function renderItems(FileNode $node): string
    {
        $template = new \Text_Template($this->templatePath . 'file_item.html', '{{', '}}');

$methodItemTemplate = new \Text_Template(
            $this->templatePath . 'method_item.html',
            '{{',
            '}}'
        );

$items = $this->renderItemTemplate(
            $template,
            [
                'name'                         => 'Total',
                'numClasses'                   => $node->getNumClassesAndTraits(),
                'numTestedClasses'             => $node->getNumTestedClassesAndTraits(),
                'numMethods'                   => $node->getNumFunctionsAndMethods(),
                'numTestedMethods'             => $node->getNumTestedFunctionsAndMethods(),
                'linesExecutedPercent'         => $node->getLineExecutedPercent(false),
                'linesExecutedPercentAsString' => $node->getLineExecutedPercent(),
                'numExecutedLines'             => $node->getNumExecutedLines(),
                'numExecutableLines'           => $node->getNumExecutableLines(),
                'testedMethodsPercent'         => $node->getTestedFunctionsAndMethodsPercent(false),
                'testedMethodsPercentAsString' => $node->getTestedFunctionsAndMethodsPercent(),
                'testedClassesPercent'         => $node->getTestedClassesAndTraitsPercent(false),
                'testedClassesPercentAsString' => $node->getTestedClassesAndTraitsPercent(),
                'crap'                         => '<abbr title="Change Risk Anti-Patterns (CRAP) Index">CRAP</abbr>',
            ]
        );

$items .= $this->renderFunctionItems(
            $node->getFunctions(),
            $methodItemTemplate
        );

$items .= $this->renderTraitOrClassItems(
            $node->getTraits(),
            $template,
            $methodItemTemplate
        );

$items .= $this->renderTraitOrClassItems(
            $node->getClasses(),
            $template,
            $methodItemTemplate
        );

return $items;
    }

protected function renderTraitOrClassItems(array $items, \Text_Template $template, \Text_Template $methodItemTemplate): string
    {
        $buffer = '';

if (empty($items)) {
            return $buffer;
        }

foreach ($items as $name => $item) {
            $numMethods       = 0;
            $numTestedMethods = 0;

foreach ($item['methods'] as $method) {
                if ($method['executableLines'] > 0) {
                    $numMethods++;

if ($method['executedLines'] === $method['executableLines']) {
                        $numTestedMethods++;
                    }
                }
            }

if ($item['executableLines'] > 0) {
                $numClasses                   = 1;
                $numTestedClasses             = $numTestedMethods == $numMethods ? 1 : 0;
                $linesExecutedPercentAsString = Util::percent(
                    $item['executedLines'],
                    $item['executableLines'],
                    true
                );
            } else {
                $numClasses                   = 'n/a';
                $numTestedClasses             = 'n/a';
                $linesExecutedPercentAsString = 'n/a';
            }

$buffer .= $this->renderItemTemplate(
                $template,
                [
                    'name'                         => $this->abbreviateClassName($name),
                    'numClasses'                   => $numClasses,
                    'numTestedClasses'             => $numTestedClasses,
                    'numMethods'                   => $numMethods,
                    'numTestedMethods'             => $numTestedMethods,
                    'linesExecutedPercent'         => Util::percent(
                        $item['executedLines'],
                        $item['executableLines'],
                        false
                    ),
                    'linesExecutedPercentAsString' => $linesExecutedPercentAsString,
                    'numExecutedLines'             => $item['executedLines'],
                    'numExecutableLines'           => $item['executableLines'],
                    'testedMethodsPercent'         => Util::percent(
                        $numTestedMethods,
                        $numMethods
                    ),
                    'testedMethodsPercentAsString' => Util::percent(
                        $numTestedMethods,
                        $numMethods,
                        true
                    ),
                    'testedClassesPercent'         => Util::percent(
                        $numTestedMethods == $numMethods ? 1 : 0,
                        1
                    ),
                    'testedClassesPercentAsString' => Util::percent(
                        $numTestedMethods == $numMethods ? 1 : 0,
                        1,
                        true
                    ),
                    'crap'                         => $item['crap'],
                ]
            );

foreach ($item['methods'] as $method) {
                $buffer .= $this->renderFunctionOrMethodItem(
                    $methodItemTemplate,
                    $method,
                    ' '
                );
            }
        }

return $buffer;
    }

protected function renderFunctionItems(array $functions, \Text_Template $template): string
    {
        if (empty($functions)) {
            return '';
        }

$buffer = '';

foreach ($functions as $function) {
            $buffer .= $this->renderFunctionOrMethodItem(
                $template,
                $function
            );
        }

return $buffer;
    }

protected function renderFunctionOrMethodItem(\Text_Template $template, array $item, string $indent = ''): string
    {
        $numMethods       = 0;
        $numTestedMethods = 0;

if ($item['executableLines'] > 0) {
            $numMethods = 1;

if ($item['executedLines'] === $item['executableLines']) {
                $numTestedMethods = 1;
            }
        }

return $this->renderItemTemplate(
            $template,
            [
                'name'                         => \sprintf(
                    '%s<a href="#%d"><abbr title="%s">%s</abbr></a>',
                    $indent,
                    $item['startLine'],
                    \htmlspecialchars($item['signature'], $this->htmlSpecialCharsFlags),
                    $item['functionName'] ?? $item['methodName']
                ),
                'numMethods'                   => $numMethods,
                'numTestedMethods'             => $numTestedMethods,
                'linesExecutedPercent'         => Util::percent(
                    $item['executedLines'],
                    $item['executableLines']
                ),
                'linesExecutedPercentAsString' => Util::percent(
                    $item['executedLines'],
                    $item['executableLines'],
                    true
                ),
                'numExecutedLines'             => $item['executedLines'],
                'numExecutableLines'           => $item['executableLines'],
                'testedMethodsPercent'         => Util::percent(
                    $numTestedMethods,
                    1
                ),
                'testedMethodsPercentAsString' => Util::percent(
                    $numTestedMethods,
                    1,
                    true
                ),
                'crap'                         => $item['crap'],
            ]
        );
    }

protected function renderSource(FileNode $node): string
    {
        $coverageData = $node->getCoverageData();
        $testData     = $node->getTestData();
        $codeLines    = $this->loadFile($node->getPath());
        $lines        = '';
        $i            = 1;

foreach ($codeLines as $line) {
            $trClass        = '';
            $popoverContent = '';
            $popoverTitle   = '';

if (\array_key_exists($i, $coverageData)) {
                $numTests = ($coverageData[$i] ? \count($coverageData[$i]) : 0);

if ($coverageData[$i] === null) {
                    $trClass = ' class="warning"';
                } elseif ($numTests == 0) {
                    $trClass = ' class="danger"';
                } else {
                    $lineCss        = 'covered-by-large-tests';
                    $popoverContent = '<ul>';

if ($numTests > 1) {
                        $popoverTitle = $numTests . ' tests cover line ' . $i;
                    } else {
                        $popoverTitle = '1 test covers line ' . $i;
                    }

foreach ($coverageData[$i] as $test) {
                        if ($lineCss == 'covered-by-large-tests' && $testData[$test]['size'] == 'medium') {
                            $lineCss = 'covered-by-medium-tests';
                        } elseif ($testData[$test]['size'] == 'small') {
                            $lineCss = 'covered-by-small-tests';
                        }

switch ($testData[$test]['status']) {
                            case 0:
                                switch ($testData[$test]['size']) {
                                    case 'small':
                                        $testCSS = ' class="covered-by-small-tests"';

break;

case 'medium':
                                        $testCSS = ' class="covered-by-medium-tests"';

break;

default:
                                        $testCSS = ' class="covered-by-large-tests"';

break;
                                }

break;

case 1:
                            case 2:
                                $testCSS = ' class="warning"';

break;

case 3:
                                $testCSS = ' class="danger"';

break;

case 4:
                                $testCSS = ' class="danger"';

break;

default:
                                $testCSS = '';
                        }

$popoverContent .= \sprintf(
                            '<li%s>%s</li>',
                            $testCSS,
                            \htmlspecialchars($test, $this->htmlSpecialCharsFlags)
                        );
                    }

$popoverContent .= '</ul>';
                    $trClass         = ' class="' . $lineCss . ' popin"';
                }
            }

$popover = '';

if (!empty($popoverTitle)) {
                $popover = \sprintf(
                    ' data-title="%s" data-content="%s" data-placement="top" data-html="true"',
                    $popoverTitle,
                    \htmlspecialchars($popoverContent, $this->htmlSpecialCharsFlags)
                );
            }

$lines .= \sprintf(
                '     <tr%s><td%s><div align="right"><a name="%d"></a><a href="#%d">%d</a></div></td><td class="codeLine">%s</td></tr>' . "\n",
                $trClass,
                $popover,
                $i,
                $i,
                $i,
                $line
            );

$i++;
        }

return $lines;
    }

/**
     * @param string $file
     */
    protected function loadFile($file): array
    {
        $buffer              = \file_get_contents($file);
        $tokens              = \token_get_all($buffer);
        $result              = [''];
        $i                   = 0;
        $stringFlag          = false;
        $fileEndsWithNewLine = \substr($buffer, -1) == "\n";

unset($buffer);

foreach ($tokens as $j => $token) {
            if (\is_string($token)) {
                if ($token === '"' && $tokens[$j - 1] !== '\\') {
                    $result[$i] .= \sprintf(
                        '<span class="string">%s</span>',
                        \htmlspecialchars($token, $this->htmlSpecialCharsFlags)
                    );

$stringFlag = !$stringFlag;
                } else {
                    $result[$i] .= \sprintf(
                        '<span class="keyword">%s</span>',
                        \htmlspecialchars($token, $this->htmlSpecialCharsFlags)
                    );
                }

continue;
            }

[$token, $value] = $token;

$value = \str_replace(
                ["\t", ' '],
                ['    ', ' '],
                \htmlspecialchars($value, $this->htmlSpecialCharsFlags)
            );

if ($value === "\n") {
                $result[++$i] = '';
            } else {
                $lines = \explode("\n", $value);

foreach ($lines as $jj => $line) {
                    $line = \trim($line);

if ($line !== '') {
                        if ($stringFlag) {
                            $colour = 'string';
                        } else {
                            switch ($token) {
                                case \T_INLINE_HTML:
                                    $colour = 'html';

break;

case \T_COMMENT:
                                case \T_DOC_COMMENT:
                                    $colour = 'comment';

break;

case \T_ABSTRACT:
                                case \T_ARRAY:
                                case \T_AS:
                                case \T_BREAK:
                                case \T_CALLABLE:
                                case \T_CASE:
                                case \T_CATCH:
                                case \T_CLASS:
                                case \T_CLONE:
                                case \T_CONTINUE:
                                case \T_DEFAULT:
                                case \T_ECHO:
                                case \T_ELSE:
                                case \T_ELSEIF:
                                case \T_EMPTY:
                                case \T_ENDDECLARE:
                                case \T_ENDFOR:
                                case \T_ENDFOREACH:
                                case \T_ENDIF:
                                case \T_ENDSWITCH:
                                case \T_ENDWHILE:
                                case \T_EXIT:
                                case \T_EXTENDS:
                                case \T_FINAL:
                                case \T_FINALLY:
                                case \T_FOREACH:
                                case \T_FUNCTION:
                                case \T_GLOBAL:
                                case \T_IF:
                                case \T_IMPLEMENTS:
                                case \T_INCLUDE:
                                case \T_INCLUDE_ONCE:
                                case \T_INSTANCEOF:
                                case \T_INSTEADOF:
                                case \T_INTERFACE:
                                case \T_ISSET:
                                case \T_LOGICAL_AND:
                                case \T_LOGICAL_OR:
                                case \T_LOGICAL_XOR:
                                case \T_NAMESPACE:
                                case \T_NEW:
                                case \T_PRIVATE:
                                case \T_PROTECTED:
                                case \T_PUBLIC:
                                case \T_REQUIRE:
                                case \T_REQUIRE_ONCE:
                                case \T_RETURN:
                                case \T_STATIC:
                                case \T_THROW:
                                case \T_TRAIT:
                                case \T_TRY:
                                case \T_UNSET:
                                case \T_USE:
                                case \T_VAR:
                                case \T_WHILE:
                                case \T_YIELD:
                                    $colour = 'keyword';

break;

default:
                                    $colour = 'default';
                            }
                        }

$result[$i] .= \sprintf(
                            '<span class="%s">%s</span>',
                            $colour,
                            $line
                        );
                    }

if (isset($lines[$jj + 1])) {
                        $result[++$i] = '';
                    }
                }
            }
        }

if ($fileEndsWithNewLine) {
            unset($result[\count($result) - 1]);
        }

return $result;
    }

private function abbreviateClassName(string $className): string
    {
        $tmp = \explode('\\', $className);

if (\count($tmp) > 1) {
            $className = \sprintf(
                '<abbr title="%s">%s</abbr>',
                $className,
                \array_pop($tmp)
            );
        }

return $className;
    }
}