<?php
declare(strict_types=1);
namespace rabe\Util\tests;

use PHPUnit\Framework\TestCase;

class CfgTest extends TestCase
{
	private string $tmpDir;

	protected function setUp(): void
	{
		$this->tmpDir = rtrim(sys_get_temp_dir(), '/').'/util-settings-cfg-'.bin2hex(random_bytes(8));
		mkdir($this->tmpDir, 0775, true);
		mkdir($this->tmpDir.'/config', 0775, true);

		file_put_contents(
			$this->tmpDir.'/config/Extension.default.conf.php',
			"<?php return [\n\t'mode' => 'prod',\n\t'module' => [\n\t\t'code' => '',\n\t\t'label' => '',\n\t\t'flags' => [\n\t\t\t'enabled' => false,\n\t\t],\n\t],\n\t'feature' => [\n\t\t'endpoint' => '',\n\t],\n];\n"
		);
	}

	protected function tearDown(): void
	{
		$this->removeDir($this->tmpDir);
	}

	public function testWriteWithoutDirectoryNameUsesLocalConfigFile(): void
	{
		$result = $this->runCfg([
				'-a',
				$this->tmpDir,
				'write',
				'Extension',
				'module:code="X100"',
			]);

		$this->assertSame(0, $result['code'], $result['output']);

		$localFile = $this->tmpDir.'/config/Extension.conf.php';
		$this->assertFileExists($localFile);

		$cfg = require $localFile;
		$this->assertSame('X100', $cfg['module']['code']);
	}

	public function testWriteWithoutModeFallsBackToDefaultMode(): void
	{
		file_put_contents(
			$this->tmpDir.'/config/Extension.default.conf.php',
			"<?php return [\n\t'module' => [\n\t\t'code' => '',\n\t],\n];\n"
		);

		$result = $this->runCfg([
				'-a',
				$this->tmpDir,
				'write',
				'Extension',
				'module:code="X100"',
			]);

		$this->assertSame(0, $result['code'], $result['output']);
		$this->assertFileExists($this->tmpDir.'/config/Extension.conf.php');
	}

	public function testWriteWithInputFileWritesMultipleSettings(): void
	{
		$inFile = $this->tmpDir.'/extension-in.json';
		file_put_contents(
				$inFile,
				json_encode([
					'module' => [
						'code' => 'X100',
						'label' => 'demo-module',
					],
					'feature' => [
						'endpoint' => 'https://example.invalid/v1/resource',
					],
				], JSON_PRETTY_PRINT)
		);

		$result = $this->runCfg([
			'-a',
			$this->tmpDir,
			'write',
			'Extension',
			'--siteDir=owner_xyz',
			'-i',
			$inFile,
		]);

		$this->assertSame(0, $result['code'], $result['output']);
		$cfg = require $this->tmpDir.'/config/owner_xyz/Extension.conf.php';
		$this->assertSame('X100', $cfg['module']['code']);
		$this->assertSame('demo-module', $cfg['module']['label']);
		$this->assertSame('https://example.invalid/v1/resource', $cfg['feature']['endpoint']);
	}

	public function testWriteAcceptsJsonStringValueInSetting(): void
	{
		$result = $this->runCfg([
				'-a',
				$this->tmpDir,
				'write',
				'Extension',
				'module={"code":"X100","label":"demo-module"}',
				'--siteDir=owner_xyz',
			]);

		$this->assertSame(0, $result['code'], $result['output']);
		$cfg = require $this->tmpDir.'/config/owner_xyz/Extension.conf.php';
		$this->assertSame('X100', $cfg['module']['code']);
		$this->assertSame('demo-module', $cfg['module']['label']);
	}

	public function testWriteSupportsNestedPathWithColonNotation(): void
	{
		$result = $this->runCfg([
			'-a',
			$this->tmpDir,
			'write',
			'Extension',
			'module:flags:enabled=true',
			'--siteDir=owner_xyz',
		]);

		$this->assertSame(0, $result['code'], $result['output']);
		$cfg = require $this->tmpDir.'/config/owner_xyz/Extension.conf.php';
		$this->assertTrue($cfg['module']['flags']['enabled']);
	}

	public function testWriteWithInputFileAndSettingReturnsError(): void
	{
		$inFile = $this->tmpDir.'/extension-in.json';
		file_put_contents($inFile, json_encode(['module' => ['code' => 'X100']]));

		$result = $this->runCfg([
				'-a',
				$this->tmpDir,
				'write',
				'Extension',
				'module:code="x"',
				'-i',
				$inFile,
			]);

		$this->assertSame(1, $result['code']);
		$this->assertStringContainsString('Please use either SETTING or --in, not both.', $result['output']);
	}

	public function testWriteWithSiteDirCreatesAndWritesSiteConfig(): void
	{
		$result = $this->runCfg([
			'-a',
			$this->tmpDir,
			'write',
			'Extension',
			'module:code="X100"',
			'--siteDir=owner_xyz',
		]);

		$this->assertSame(0, $result['code'], $result['output']);

		$siteFile = $this->tmpDir.'/config/owner_xyz/Extension.conf.php';
		$this->assertFileExists($siteFile);
		$this->assertFileDoesNotExist($this->tmpDir.'/config/Extension.conf.php');

		$cfg = require $siteFile;
		$this->assertSame('X100', $cfg['module']['code']);
	}

	public function testWriteWithSiteDirMergesIntoExistingSiteConfig(): void
	{
		$firstWrite = $this->runCfg([
			'-a',
			$this->tmpDir,
			'write',
			'Extension',
			'module:code="X100"',
			'--siteDir=owner_xyz',
		]);
		$this->assertSame(0, $firstWrite['code'], $firstWrite['output']);

		$secondWrite = $this->runCfg([
			'-a',
			$this->tmpDir,
			'write',
			'Extension',
			'module:label="demo-module"',
			'--siteDir=owner_xyz',
		]);
		$this->assertSame(0, $secondWrite['code'], $secondWrite['output']);

		$siteFile = $this->tmpDir.'/config/owner_xyz/Extension.conf.php';
		$cfg = require $siteFile;

		$this->assertSame('X100', $cfg['module']['code']);
		$this->assertSame('demo-module', $cfg['module']['label']);
	}

	public function testWriteWithSiteDirUsingConfigPrefixIsNormalized(): void
	{
		$result = $this->runCfg([
				'-a',
				$this->tmpDir,
				'write',
				'Extension',
				'module:code="X100"',
				'--siteDir=config/owner_xyz',
			]);

		$this->assertSame(0, $result['code'], $result['output']);
		$this->assertFileExists($this->tmpDir.'/config/owner_xyz/Extension.conf.php');
		$this->assertFileDoesNotExist($this->tmpDir.'/config/config/owner_xyz/Extension.conf.php');
	}

	public function testWriteWithSiteDirWritesToSiteConfig(): void
	{
		$result = $this->runCfg([
				'-a',
				$this->tmpDir,
				'write',
				'Extension',
				'module:code="X100"',
				'--siteDir=owner_xyz',
			]);

		$this->assertSame(0, $result['code'], $result['output']);
		$this->assertFileExists($this->tmpDir.'/config/owner_xyz/Extension.conf.php');
	}

	public function testWriteToExistingSiteConfigCreatesBackup(): void
	{
		$firstWrite = $this->runCfg([
				'-a',
				$this->tmpDir,
				'write',
				'Extension',
				'module:code="first"',
				'--siteDir=owner_xyz',
			]);
		$this->assertSame(0, $firstWrite['code'], $firstWrite['output']);

		$secondWrite = $this->runCfg([
				'-a',
				$this->tmpDir,
				'write',
				'Extension',
				'module:code="second"',
				'--siteDir=owner_xyz',
			]);
		$this->assertSame(0, $secondWrite['code'], $secondWrite['output']);

		$siteFile = $this->tmpDir.'/config/owner_xyz/Extension.conf.php';
		$backupFile = $siteFile.'.bak';
		$this->assertFileExists($backupFile);

		$current = require $siteFile;
		$backup = require $backupFile;
		$this->assertSame('second', $current['module']['code']);
		$this->assertSame('first', $backup['module']['code']);
	}

	public function testShowWithSiteReturnsSiteSpecificValue(): void
	{
		$this->runCfg([
				'-a',
				$this->tmpDir,
				'write',
				'Extension',
				'module:code="X100"',
				'--siteDir=owner_xyz',
			]);

		$show = $this->runCfg([
				'-a',
				$this->tmpDir,
				'show',
				'Extension',
				'module:code',
				'--siteDir=owner_xyz',
			]);

		$this->assertSame(0, $show['code'], $show['output']);
		$this->assertStringContainsString('X100', $show['output']);
	}

	public function testSiteDirRejectsTraversal(): void
	{
		$result = $this->runCfg([
				'-a',
				$this->tmpDir,
				'write',
				'Extension',
				'module:code="X100"',
				'--siteDir=../owner_xyz',
			]);

		$this->assertSame(1, $result['code']);
		$this->assertStringContainsString('Invalid directory in --siteDir', $result['output']);
	}

	public function testSiteDirRejectsInvalidSegment(): void
	{
		$result = $this->runCfg([
				'-a',
				$this->tmpDir,
				'write',
				'Extension',
				'module:code="X100"',
				'--siteDir=owner xyz',
			]);

		$this->assertSame(1, $result['code']);
		$this->assertStringContainsString("Invalid directory name segment 'owner xyz' in --siteDir.", $result['output']);
	}

	public function testSiteDirRejectsEmptyValue(): void
	{
		$result = $this->runCfg([
				'-a',
				$this->tmpDir,
				'write',
				'Extension',
				'module:code="X100"',
				'--siteDir=',
		]);

		$this->assertSame(1, $result['code']);
		$this->assertStringContainsString('a value is required for --siteDir', $result['output']);
	}

	private function runCfg(array $args): array
	{
		$script = realpath(__DIR__.'/../bin/cfg');
		$this->assertNotFalse($script);

		$command = escapeshellarg(PHP_BINARY).' '.escapeshellarg($script);
		foreach ($args as $arg) {
			$command .= ' '.escapeshellarg($arg);
		}
		$command .= ' 2>&1';

		$outputLines = [];
		$exitCode = 0;
		exec($command, $outputLines, $exitCode);

		return [
			'code' => $exitCode,
			'output' => implode(PHP_EOL, $outputLines),
		];
	}

	private function removeDir(string $dir): void
	{
		if (!is_dir($dir)) {
			return;
		}

		foreach (scandir($dir) ?: [] as $entry) {
			if ($entry === '.' || $entry === '..') {
				continue;
			}

			$path = $dir.'/'.$entry;
			if (is_dir($path)) {
				$this->removeDir($path);
			} else {
				unlink($path);
			}
		}

		rmdir($dir);
	}
}