<?php
/**
 * WEVIA FIABILITY ENGINE v1.0
 * Uses sovereign LLMs to analyze infrastructure health
 * Runs HTTP checks on ALL pages, feeds results to LLM for diagnosis
 * Called by Director cron or manually
 *
 * GET ?run          → Full fiability scan
 * GET ?quick        → Quick critical-only scan
 * GET ?report       → Last report
 * GET ?urls=N       → Scan N random pages
 */
header("Content-Type: application/json; charset=utf-8");
header("Access-Control-Allow-Origin: *");

require_once "/opt/wevia-brain/wevia-master-router.php";

define("FIA_REPORT_FILE", "/var/log/wevia-director/fiability-report.json");
define("FIA_LOG", "/var/log/wevia-director/fiability.log");

// ═══ ROUTING ═══
if (isset($_GET["report"])) {
    echo @file_get_contents(FIA_REPORT_FILE) ?: json_encode(["status" => "no_report"]);
    exit;
}

$mode = "quick";
if (isset($_GET["run"])) $mode = "full";
if (isset($_GET["quick"])) $mode = "quick";
$maxUrls = intval($_GET["urls"] ?? ($mode === "full" ? 50 : 15));

$t0 = microtime(true);

// ═══ LOAD REGISTRY ═══
$registry = json_decode(file_get_contents("/opt/wevia-brain/wevia-director-registry.json"), true);
$criticalUrls = $registry["health_checks"]["critical_urls"] ?? [];
$subdomains = $registry["health_checks"]["subdomain_checks"] ?? [];

// ═══ SCAN ALL CRITICAL URLS ═══
$results = [];
$failed = [];
$slow = [];

foreach (array_slice($criticalUrls, 0, $maxUrls) as $check) {
    $url = $check["url"];
    $start = microtime(true);
    $ch = curl_init($url);
    curl_setopt_array($ch, [
        CURLOPT_RETURNTRANSFER => true, CURLOPT_TIMEOUT => 10,
        CURLOPT_FOLLOWLOCATION => true, CURLOPT_SSL_VERIFYPEER => false,
        CURLOPT_HEADER => true, CURLOPT_NOBODY => false,
    ]);
    $resp = curl_exec($ch);
    $code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    $time = round((microtime(true) - $start) * 1000);
    $size = curl_getinfo($ch, CURLINFO_SIZE_DOWNLOAD);
    
    // Check for JS errors in HTML
    $hasJsError = false;
    $hasEmptyBody = ($size < 20);
    $hasSpaWrapper = (strpos($resp, "Enterprise Digital Transformation") !== false && strpos($resp, basename($url)) === false);
    
    $status = "ok";
    if ($code >= 400) $status = "error";
    elseif ($hasEmptyBody) $status = "empty";
    elseif ($hasSpaWrapper) $status = "spa_wrapped";
    elseif ($time > 5000) $status = "slow";
    
    $entry = [
        "url" => basename(parse_url($url, PHP_URL_PATH)),
        "full_url" => $url,
        "code" => $code,
        "time_ms" => $time,
        "size" => $size,
        "status" => $status,
    ];
    $results[] = $entry;
    
    if ($status !== "ok") $failed[] = $entry;
    if ($time > 3000) $slow[] = $entry;
}

// ═══ SCAN SUBDOMAINS ═══
$subResults = [];
foreach ($subdomains as $sub) {
    $start = microtime(true);
    $ch = curl_init("https://$sub/");
    curl_setopt_array($ch, [
        CURLOPT_RETURNTRANSFER => true, CURLOPT_TIMEOUT => 8,
        CURLOPT_FOLLOWLOCATION => true, CURLOPT_SSL_VERIFYPEER => false,
        CURLOPT_NOBODY => true,
    ]);
    curl_exec($ch);
    $code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    $time = round((microtime(true) - $start) * 1000);
    $subResults[] = ["sub" => $sub, "code" => $code, "time_ms" => $time, "ok" => ($code >= 200 && $code < 400)];
}

// ═══ ASK SOVEREIGN LLM TO ANALYZE ═══
$summary = [
    "total_urls" => count($results),
    "ok" => count(array_filter($results, fn($r) => $r["status"] === "ok")),
    "failed" => $failed,
    "slow" => $slow,
    "subdomains_ok" => count(array_filter($subResults, fn($r) => $r["ok"])),
    "subdomains_total" => count($subResults),
    "subdomains_failed" => array_values(array_filter($subResults, fn($r) => !$r["ok"])),
];

$llmAnalysis = "";
if (!empty($failed) || !empty($slow)) {
    $prompt = "Tu es WEVIA Director, agent DevOps autonome. Analyse ce rapport de fiabilité et donne un diagnostic concis avec actions prioritaires:

"
        . "URLs OK: {$summary["ok"]}/{$summary["total_urls"]}
"
        . "Failed:
" . json_encode($failed, JSON_PRETTY_PRINT) . "
"
        . "Slow (>3s):
" . json_encode($slow, JSON_PRETTY_PRINT) . "
"
        . "Subdomains: {$summary["subdomains_ok"]}/{$summary["subdomains_total"]}
"
        . "
Réponds en JSON: {\"diagnosis\": \"...\", \"priority_actions\": [...], \"risk_level\": \"ok|medium|high|critical\"}";
    
    // DISABLED:     $llmResult = mr_route($prompt, "Tu es un expert DevOps. Réponds UNIQUEMENT en JSON valide.");
    // DISABLED:     $llmAnalysis = $llmResult["content"] ?? "";
}

// ═══ BUILD REPORT ═══
$report = [
    "timestamp" => date("c"),
    "mode" => $mode,
    "duration_ms" => round((microtime(true) - $t0) * 1000),
    "summary" => $summary,
    "llm_analysis" => $llmAnalysis,
    "llm_provider" => $llmResult["provider"] ?? "none",
    "results" => $results,
    "subdomains" => $subResults,
    "score" => round(($summary["ok"] / max($summary["total_urls"], 1)) * 100),
];

file_put_contents(FIA_REPORT_FILE, json_encode($report, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE));
$logLine = date("Y-m-d H:i:s") . " | score={$report["score"]}% | {$summary["ok"]}/{$summary["total_urls"]} OK | failed=" . count($failed) . " | " . round($report["duration_ms"]/1000,1) . "s
";
file_put_contents(FIA_LOG, $logLine, FILE_APPEND);

echo json_encode($report, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE);