<?php
// WEVIA Playwright Visual Test Runner — API Endpoint
// GET /api/pw-test.php?action=run&tests=greeting,swot,pdf-audit
// GET /api/pw-test.php?action=run (all tests)
// GET /api/pw-test.php?action=status
// GET /api/pw-test.php?action=results

header('Content-Type: application/json');
$action = $_GET['action'] ?? 'status';
$pidFile = '/tmp/pw-test.pid';
$logFile = '/tmp/pw-test.log';
$resultFile = '/var/www/html/test-report/playwright-results.json';
$script = '/var/www/html/tests/pw-visual-tests.py';

switch ($action) {
    case 'run':
        if (file_exists($pidFile)) {
            $pid = trim(file_get_contents($pidFile));
            if (file_exists("/proc/$pid")) {
                echo json_encode(['status' => 'running', 'pid' => $pid, 'log' => tail($logFile, 5)]);
                exit;
            }
        }
        $tests = $_GET['tests'] ?? '';
        $testArgs = $tests ? implode(' ', array_map('escapeshellarg', explode(',', $tests))) : '';
        $cmd = "nohup python3 $script $testArgs > $logFile 2>&1 & echo $!";
        $pid = trim(shell_exec($cmd));
        file_put_contents($pidFile, $pid);
        echo json_encode(['status' => 'started', 'pid' => $pid, 'tests' => $tests ?: 'all']);
        break;

    case 'status':
        if (file_exists($pidFile)) {
            $pid = trim(file_get_contents($pidFile));
            $running = file_exists("/proc/$pid");
            echo json_encode([
                'status' => $running ? 'running' : 'completed',
                'pid' => $pid,
                'log' => tail($logFile, 10)
            ]);
        } else {
            echo json_encode(['status' => 'idle']);
        }
        break;

    case 'results':
        if (file_exists($resultFile)) {
            echo file_get_contents($resultFile);
        } else {
            echo json_encode(['error' => 'No results yet']);
        }
        break;

    case 'screenshots':
        $dir = '/var/www/html/test-report/screenshots';
        $files = array_filter(glob("$dir/pw-*.png"), 'is_file');
        $list = array_map(function($f) {
            return ['name' => basename($f), 'size' => filesize($f), 'url' => '/test-report/screenshots/' . basename($f), 'time' => filemtime($f)];
        }, $files);
        echo json_encode(array_values($list));
        break;

    default:
        echo json_encode(['error' => 'Unknown action', 'actions' => ['run','status','results','screenshots']]);
}

function tail($file, $lines = 10) {
    if (!file_exists($file)) return '';
    $f = file($file);
    return implode('', array_slice($f, -$lines));
}