<?php

declare(strict_types=1);

namespace Phred\Tasker\Tests;

use PHPUnit\Framework\TestCase;
use Phred\Tasker\Runner;
use Phred\Tasker\ArgvParser;
use Phred\TaskerBridges\Phred\InputAdapter;
use Phred\TaskerBridges\Phred\OutputAdapter;
use Phred\ConsoleContracts\CommandInterface;
use Phred\ConsoleContracts\InputInterface;
use Phred\ConsoleContracts\OutputInterface;

class IntegrationTest extends TestCase
{
    private string $tempVendor;
    private string $cwd;

    protected function setUp(): void
    {
        $this->cwd = getcwd();
        $this->tempVendor = sys_get_temp_dir() . '/tasker_integration_test_' . uniqid();
        mkdir($this->tempVendor, 0777, true);
        mkdir($this->tempVendor . '/composer', 0777, true);
    }

    protected function tearDown(): void
    {
        $this->removeDirectory($this->tempVendor);
        chdir($this->cwd);
    }

    private function removeDirectory(string $path): void
    {
        if (is_link($path)) {
            unlink($path);
            return;
        }

        if (!is_dir($path)) {
            if (file_exists($path)) {
                unlink($path);
            }
            return;
        }

        $files = array_diff(scandir($path), ['.', '..']);
        foreach ($files as $file) {
            $this->removeDirectory("$path/$file");
        }
        rmdir($path);
    }

    public function testCommandDiscoveryViaComposer(): void
    {
        // Mock installed.json
        $installedJson = [
            'packages' => [
                [
                    'name' => 'vendor/package',
                    'extra' => [
                        'phred-tasker' => [
                            'commands' => [
                                IntegrationMockCommand::class
                            ]
                        ]
                    ]
                ]
            ]
        ];
        file_put_contents($this->tempVendor . '/composer/installed.json', json_encode($installedJson));

        // Mock root composer.json in the temp dir (we'll chdir there)
        $rootComposer = [
            'extra' => [
                'phred-tasker' => [
                    'commands' => [
                        // Root commands can also be here
                    ]
                ]
            ]
        ];
        $testDir = sys_get_temp_dir() . '/tasker_root_' . uniqid();
        mkdir($testDir, 0777, true);
        file_put_contents($testDir . '/composer.json', json_encode($rootComposer));
        
        // Symlink vendor to the testDir
        symlink($this->tempVendor, $testDir . '/vendor');

        chdir($testDir);

        $runner = new Runner();
        $runner->discover();

        $this->assertInstanceOf(IntegrationMockCommand::class, $runner->find('integration:mock'));
        
        $this->removeDirectory($testDir);
    }

    public function testFullExecutionFlow(): void
    {
        $runner = new Runner();
        $command = new IntegrationMockCommand();
        $runner->register($command);

        $parser = new ArgvParser(['bin/tasker', 'integration:mock', 'val1']);
        
        // IO Wiring
        $output = new OutputAdapter(false); // no ansi for easier testing
        $output->setVerbosity($parser->getVerbosity());
        
        $cmdArgs = $command->getArguments();
        $remaining = $parser->getRemainingArguments();
        $mappedArgs = [];
        $i = 0;
        foreach ($cmdArgs as $name => $desc) {
            if (isset($remaining[$i])) {
                $mappedArgs[$name] = $remaining[$i];
            }
            $i++;
        }
        $input = new InputAdapter($mappedArgs, []);

        ob_start();
        $exitCode = $runner->run($command, $input, $output);
        $content = ob_get_clean();

        $this->assertEquals(0, $exitCode);
        $this->assertStringContainsString('Mock executed with arg: val1', $content);
    }

    public function testArgvParserEdgeCases(): void
    {
        // Combined flags rejection is NOT implemented in current ArgvParser, 
        // it treats unknown things as remaining arguments.
        // Let's test current behavior and see if it meets needs.
        
        $parser = new ArgvParser(['bin/tasker', '-vn', 'cmd']);
        // Current implementation: 
        // -vn is not recognized as -v and -n, it goes to remaining.
        $this->assertEquals(1, $parser->getVerbosity());
        $this->assertFalse($parser->isNoInteraction());
        $this->assertContains('-vn', $parser->getRemainingArguments());
    }

    public function testHelpOutput(): void
    {
        $runner = new Runner();
        $command = $runner->find('help');
        $this->assertNotNull($command);

        $input = new InputAdapter(['command' => 'list'], []);
        $output = new OutputAdapter(false);

        ob_start();
        $runner->run($command, $input, $output);
        $content = ob_get_clean();

        $this->assertStringContainsString('Usage:', $content);
        $this->assertStringContainsString('tasker help <command_name>', $content);
        $this->assertStringContainsString('tasker list', $content);
    }
}

class IntegrationMockCommand implements CommandInterface
{
    public function getName(): string { return 'integration:mock'; }
    public function getDescription(): string { return 'Mock for integration test'; }
    public function getArguments(): array { return ['arg1' => 'An argument']; }
    public function getOptions(): array { return []; }
    public function execute(InputInterface $input, OutputInterface $output): int 
    { 
        $output->writeln('Mock executed with arg: ' . $input->getArgument('arg1'));
        return 0; 
    }
}