<?php
// V38 Opus - Andon auto-resolve (closes alerts when symptoms gone)
// Doctrine #7 ZERO MANUAL + #13 cause racine
header("Content-Type: application/json");

$db = new PDO("pgsql:host=localhost;dbname=adx_system", "admin", "admin123",
    [PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION]);

$resolved = [];

// Rule 1: blade-agent-exec — auto-resolve if agent callback restored (last done < 30min)
$last_done = 0;
foreach (glob("/var/www/html/api/blade-tasks/task_*.json") as $tf) {
    $td = @json_decode(@file_get_contents($tf), true);
    if (($td["status"] ?? "") === "done") {
        $c = strtotime($td["completed_at"] ?? "1970-01-01");
        if ($c > $last_done) $last_done = $c;
    }
}
if ($last_done && (time() - $last_done) < 1800) {
    $s = $db->prepare("UPDATE weval.andon_alerts SET status='resolved', resolved_at=NOW(), resolved_by='auto-V38', resolution_path=:r WHERE station='blade-agent-exec' AND status='open' RETURNING id");
    $s->execute([":r" => "Agent Blade callback restored (last done " . date("c", $last_done) . ")"]);
    foreach ($s->fetchAll(PDO::FETCH_ASSOC) as $r) $resolved[] = ["rule" => "blade-recovered", "id" => $r["id"]];
}

// Rule 2: Auto-expire stale open alerts > 30 days
$s = $db->prepare("UPDATE weval.andon_alerts SET status='expired', resolved_at=NOW(), resolved_by='auto-V38-expired' WHERE status='open' AND created_at < NOW() - INTERVAL '30 days' RETURNING id, station");
$s->execute();
foreach ($s->fetchAll(PDO::FETCH_ASSOC) as $r) $resolved[] = ["rule" => "stale-30d", "id" => $r["id"], "station" => $r["station"]];

// Rule 3: Duplicate open alerts same station — keep latest, expire olders
$s = $db->query("
    WITH ranked AS (
        SELECT id, station, ROW_NUMBER() OVER (PARTITION BY station ORDER BY created_at DESC) rn
        FROM weval.andon_alerts WHERE status='open'
    )
    UPDATE weval.andon_alerts a SET status='deduplicated', resolved_at=NOW(), resolved_by='auto-V38-dedup'
    FROM ranked r WHERE a.id = r.id AND r.rn > 1
    RETURNING a.id, a.station
");
foreach ($s->fetchAll(PDO::FETCH_ASSOC) as $r) $resolved[] = ["rule" => "dedup", "id" => $r["id"], "station" => $r["station"]];

echo json_encode([
    "ok" => true,
    "v" => "V38-andon-autoresolve",
    "ts" => date("c"),
    "resolved_count" => count($resolved),
    "resolved" => $resolved
], JSON_PRETTY_PRINT);