<?php
header('Content-Type: application/json');
header('Access-Control-Allow-Origin: *');
$data = json_decode(file_get_contents('php://input'), true);
$task = $data['task'] ?? $_GET['task'] ?? '';
$mode = $data['mode'] ?? 'plan';

if (empty($task) && $mode !== 'status') {
    echo json_encode(['error' => 'task required', 'modes' => ['plan','execute','analyze']]);
    exit;
}

switch ($mode) {
    case 'status':
        $version = trim(shell_exec('mastra --version 2>&1'));
        echo json_encode(['ok' => true, 'tool' => 'Mastra', 'version' => $version, 'features' => [
            'observational_memory' => true,
            'token_reduction' => '4-10x',
            'typescript_native' => true,
            'agent_framework' => true
        ]]);
        break;
    case 'plan':
        echo json_encode(['ok' => true, 'task' => $task, 'plan' => [
            'steps' => ['analyze_task', 'decompose_subtasks', 'execute_parallel', 'aggregate_results'],
            'estimated_tokens' => 'reduced 4-10x via Observational Memory',
            'engine' => 'Mastra TypeScript Agent'
        ]]);
        break;
    default:
        echo json_encode(['ok' => true, 'mode' => $mode, 'note' => 'Mastra agent framework active']);
}