<?php
/**
 * WEVIA Vault Semantic Search — Qdrant + Ollama embeddings
 * /api/wevia-vault-search.php?q=souverain
 */
header('Content-Type: application/json');
$q = $_GET['q'] ?? $_POST['q'] ?? '';
if (!$q) { echo json_encode(['error' => 'no query']); exit; }

// Get embedding from Ollama
$ch = curl_init('http://127.0.0.1:11434/api/embed');
curl_setopt_array($ch, [
    CURLOPT_POST => true, CURLOPT_RETURNTRANSFER => true, CURLOPT_TIMEOUT => 8,
    CURLOPT_HTTPHEADER => ['Content-Type: application/json'],
    CURLOPT_POSTFIELDS => json_encode(['model' => 'all-minilm', 'input' => substr($q, 0, 500)])
]);
$r = curl_exec($ch); curl_close($ch);
$emb = json_decode($r, true)['embeddings'][0] ?? null;
if (!$emb) { echo json_encode(['error' => 'embedding failed']); exit; }

// Search Qdrant
$ch = curl_init('http://127.0.0.1:6333/collections/obsidian_vault/points/query');
curl_setopt_array($ch, [
    CURLOPT_POST => true, CURLOPT_RETURNTRANSFER => true, CURLOPT_TIMEOUT => 5,
    CURLOPT_HTTPHEADER => ['Content-Type: application/json'],
    CURLOPT_POSTFIELDS => json_encode(['query' => $emb, 'limit' => 5, 'with_payload' => true])
]);
$r = curl_exec($ch); curl_close($ch);
$data = json_decode($r, true);
$results = [];
foreach ($data['result']['points'] ?? [] as $p) {
    $results[] = [
        'file' => $p['payload']['file'] ?? '?',
        'score' => round($p['score'] ?? 0, 3),
        'snippet' => substr($p['payload']['content'] ?? '', 0, 200)
    ];
}
echo json_encode(['query' => $q, 'results' => $results, 'count' => count($results), 'engine' => 'qdrant+ollama']);