class ResultPrinter

final class ResultPrinter {
    private readonly Printer $printer;
    private readonly bool $colors;
    public function __construct(Printer $printer, bool $colors) {
        $this->printer = $printer;
        $this->colors = $colors;
    }
    
    /**
     * @psalm-param array<string, TestResultCollection> $tests
     */
    public function print(array $tests) : void {
        foreach ($tests as $prettifiedClassName => $_tests) {
            $this->printPrettifiedClassName($prettifiedClassName);
            foreach ($_tests as $test) {
                $this->printTestResult($test);
            }
            $this->printer
                ->print(PHP_EOL);
        }
    }
    
    /**
     * @psalm-param string $prettifiedClassName
     */
    private function printPrettifiedClassName(string $prettifiedClassName) : void {
        $buffer = $prettifiedClassName;
        if ($this->colors) {
            $buffer = Color::colorizeTextBox('underlined', $buffer);
        }
        $this->printer
            ->print($buffer . PHP_EOL);
    }
    private function printTestResult(TestDoxTestResult $test) : void {
        $this->printTestResultHeader($test);
        $this->printTestResultBody($test);
    }
    private function printTestResultHeader(TestDoxTestResult $test) : void {
        $buffer = ' ' . $this->symbolFor($test->status()) . ' ';
        if ($this->colors) {
            $this->printer
                ->print(Color::colorizeTextBox($this->colorFor($test->status()), $buffer));
        }
        else {
            $this->printer
                ->print($buffer);
        }
        $this->printer
            ->print($test->test()
            ->testDox()
            ->prettifiedMethodName($this->colors) . PHP_EOL);
    }
    private function printTestResultBody(TestDoxTestResult $test) : void {
        if ($test->status()
            ->isSuccess()) {
            return;
        }
        if (!$test->hasThrowable()) {
            return;
        }
        $this->printTestResultBodyStart($test);
        $this->printThrowable($test);
        $this->printTestResultBodyEnd($test);
    }
    private function printTestResultBodyStart(TestDoxTestResult $test) : void {
        $this->printer
            ->print($this->prefixLines($this->prefixFor('start', $test->status()), ''));
        $this->printer
            ->print(PHP_EOL);
    }
    private function printTestResultBodyEnd(TestDoxTestResult $test) : void {
        $this->printer
            ->print(PHP_EOL);
        $this->printer
            ->print($this->prefixLines($this->prefixFor('last', $test->status()), ''));
        $this->printer
            ->print(PHP_EOL);
    }
    private function printThrowable(TestDoxTestResult $test) : void {
        $throwable = $test->throwable();
        assert($throwable instanceof Throwable);
        $message = trim($throwable->description());
        $stackTrace = $this->formatStackTrace($throwable->stackTrace());
        $diff = '';
        if (!empty($message) && $this->colors) {
            [
                'message' => $message,
                'diff' => $diff,
            ] = $this->colorizeMessageAndDiff($message, $this->messageColorFor($test->status()));
        }
        if (!empty($message)) {
            $this->printer
                ->print($this->prefixLines($this->prefixFor('message', $test->status()), $message));
            $this->printer
                ->print(PHP_EOL);
        }
        if (!empty($diff)) {
            $this->printer
                ->print($this->prefixLines($this->prefixFor('diff', $test->status()), $diff));
            $this->printer
                ->print(PHP_EOL);
        }
        if (!empty($stackTrace)) {
            if (!empty($message) || !empty($diff)) {
                $prefix = $this->prefixFor('default', $test->status());
            }
            else {
                $prefix = $this->prefixFor('trace', $test->status());
            }
            $this->printer
                ->print($this->prefixLines($prefix, PHP_EOL . $stackTrace));
        }
    }
    
    /**
     * @psalm-return array{message: string, diff: string}
     */
    private function colorizeMessageAndDiff(string $buffer, string $style) : array {
        $lines = $buffer ? array_map('\\rtrim', explode(PHP_EOL, $buffer)) : [];
        $message = [];
        $diff = [];
        $insideDiff = false;
        foreach ($lines as $line) {
            if ($line === '--- Expected') {
                $insideDiff = true;
            }
            if (!$insideDiff) {
                $message[] = $line;
            }
            else {
                if (str_starts_with($line, '-')) {
                    $line = Color::colorize('fg-red', Color::visualizeWhitespace($line, true));
                }
                elseif (str_starts_with($line, '+')) {
                    $line = Color::colorize('fg-green', Color::visualizeWhitespace($line, true));
                }
                elseif ($line === '@@ @@') {
                    $line = Color::colorize('fg-cyan', $line);
                }
                $diff[] = $line;
            }
        }
        $message = implode(PHP_EOL, $message);
        $diff = implode(PHP_EOL, $diff);
        if (!empty($message)) {
            $message = Color::colorizeTextBox($style, $message);
        }
        return [
            'message' => $message,
            'diff' => $diff,
        ];
    }
    private function formatStackTrace(string $stackTrace) : string {
        if (!$this->colors) {
            return rtrim($stackTrace);
        }
        $lines = [];
        $previousPath = '';
        foreach (explode(PHP_EOL, $stackTrace) as $line) {
            if (preg_match('/^(.*):(\\d+)$/', $line, $matches)) {
                $lines[] = Color::colorizePath($matches[1], $previousPath) . Color::dim(':') . Color::colorize('fg-blue', $matches[2]) . "\n";
                $previousPath = $matches[1];
                continue;
            }
            $lines[] = $line;
            $previousPath = '';
        }
        return rtrim(implode('', $lines));
    }
    private function prefixLines(string $prefix, string $message) : string {
        return implode(PHP_EOL, array_map(static fn(string $line) => '   ' . $prefix . ($line ? ' ' . $line : ''), preg_split('/\\r\\n|\\r|\\n/', $message)));
    }
    
    /**
     * @psalm-param 'default'|'start'|'message'|'diff'|'trace'|'last' $type
     */
    private function prefixFor(string $type, TestStatus $status) : string {
        if (!$this->colors) {
            return '│';
        }
        return Color::colorize($this->colorFor($status), match ($type) {    'default' => '│',
            'start' => '┐',
            'message' => '├',
            'diff' => '┊',
            'trace' => '╵',
            'last' => '┴',
        
        });
    }
    private function colorFor(TestStatus $status) : string {
        if ($status->isSuccess()) {
            return 'fg-green';
        }
        if ($status->isError()) {
            return 'fg-yellow';
        }
        if ($status->isFailure()) {
            return 'fg-red';
        }
        if ($status->isSkipped()) {
            return 'fg-cyan';
        }
        if ($status->isIncomplete() || $status->isDeprecation() || $status->isNotice() || $status->isRisky() || $status->isWarning()) {
            return 'fg-yellow';
        }
        return 'fg-blue';
    }
    private function messageColorFor(TestStatus $status) : string {
        if ($status->isSuccess()) {
            return '';
        }
        if ($status->isError()) {
            return 'bg-yellow,fg-black';
        }
        if ($status->isFailure()) {
            return 'bg-red,fg-white';
        }
        if ($status->isSkipped()) {
            return 'fg-cyan';
        }
        if ($status->isIncomplete() || $status->isDeprecation() || $status->isNotice() || $status->isRisky() || $status->isWarning()) {
            return 'fg-yellow';
        }
        return 'fg-white,bg-blue';
    }
    private function symbolFor(TestStatus $status) : string {
        if ($status->isSuccess()) {
            return '✔';
        }
        if ($status->isError() || $status->isFailure()) {
            return '✘';
        }
        if ($status->isSkipped()) {
            return '↩';
        }
        if ($status->isDeprecation() || $status->isNotice() || $status->isRisky() || $status->isWarning()) {
            return '⚠';
        }
        if ($status->isIncomplete()) {
            return '∅';
        }
        return '?';
    }

}