<?php
// WEVIA TOOL EXECUTOR v1.0 — Replaces hardcoded intents with LLM tool-use
// The LLM sees 30 tools and DECIDES which to call. No more regex patterns.
opcache_invalidate(__FILE__, true);
header("Content-Type: application/json");
header("Access-Control-Allow-Origin: *");

$msg = $_POST["message"] ?? json_decode(file_get_contents("php://input"), true)["message"] ?? "";
if (!$msg) { echo json_encode(["error" => "no message"]); exit; }

// 1. Load tool registry
$registry = json_decode(file_get_contents(__DIR__ . "/wevia-tool-registry.json"), true);
$tools = $registry["tools"] ?? [];

// 2. Build tool catalog for LLM
$catalog = "TOOLS DISPONIBLES (appelle-en 1 ou plusieurs):\n";
foreach ($tools as $i => $t) {
    $catalog .= ($i+1) . ". " . $t["name"] . " — " . $t["desc"] . "\n";
}
$catalog .= "\nRéponds UNIQUEMENT en JSON: {\"tools\":[\"tool_name1\",\"tool_name2\"],\"summary\":\"ce que tu fais\"}\n";
$catalog .= "Si aucun outil ne correspond, réponds: {\"tools\":[\"arena_chat\"],\"summary\":\"question generale\"}\n";

// 3. Ask LLM which tools to call (fast: Groq or NIM)
$env = [];
foreach (file("/etc/weval/secrets.env") as $l) {
    $l = trim($l);
    if ($l && $l[0] !== "#" && strpos($l, "=")) {
        list($k, $v) = explode("=", $l, 2);
        $env[trim($k)] = trim($v);
    }
}

$llm_prompt = $catalog . "\nMessage utilisateur: " . $msg;
$tool_names = [];

// Try Groq first (fastest)
$groq_key = $env["GROQ_KEY"] ?? "";
if ($groq_key) {
    $ch = curl_init("https://api.groq.com/openai/v1/chat/completions");
    curl_setopt_array($ch, [CURLOPT_RETURNTRANSFER => true, CURLOPT_POST => true, CURLOPT_TIMEOUT => 8,
        CURLOPT_HTTPHEADER => ["Content-Type: application/json", "Authorization: Bearer $groq_key"],
        CURLOPT_POSTFIELDS => json_encode([
            "model" => "llama-3.3-70b-versatile",
            "messages" => [
                ["role" => "system", "content" => "Tu es un routeur. Analyse le message et choisis le(s) outil(s) a appeler. Reponds UNIQUEMENT en JSON valide."],
                ["role" => "user", "content" => $llm_prompt]
            ],
            "max_tokens" => 200, "temperature" => 0
        ])
    ]);
    $r = curl_exec($ch);
    $d = json_decode($r, true);
    $text = $d["choices"][0]["message"]["content"] ?? "";
    // Extract JSON from response
    if (preg_match("/\{.*\}/s", $text, $m)) {
        $parsed = json_decode($m[0], true);
        $tool_names = $parsed["tools"] ?? [];
        $summary = $parsed["summary"] ?? "";
    }
}

// 4. Execute selected tools
$results = [];
$base_url = "https://weval-consulting.com";

foreach ($tool_names as $tn) {
    $tool = null;
    foreach ($tools as $t) { if ($t["name"] === $tn) { $tool = $t; break; } }
    if (!$tool) continue;
    
    $endpoint = $tool["endpoint"];
    $method = $tool["method"] ?? "GET";
    
    // Handle static responses
    if ($endpoint === "STATIC" && isset($tool["response"])) {
        $results[$tn] = $tool["response"];
        continue;
    }
    
    // Build URL
    $url = (strpos($endpoint, "http") === 0) ? $endpoint : $base_url . $endpoint;
    
    $ch = curl_init($url);
    curl_setopt_array($ch, [CURLOPT_RETURNTRANSFER => true, CURLOPT_TIMEOUT => 15, CURLOPT_SSL_VERIFYPEER => false]);
    
    if ($method === "POST") {
        curl_setopt($ch, CURLOPT_POST, true);
        $body = ["message" => $msg];
        if (isset($tool["model"])) $body["model"] = $tool["model"];
        if ($tn === "multiagent") $body = ["task" => $msg, "agents" => ["wevia-master", "nim-llama", "alibaba-qwen"]];
        curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($body));
        curl_setopt($ch, CURLOPT_HTTPHEADER, ["Content-Type: application/json"]);
    }
    
    $r = curl_exec($ch);
    $d = json_decode($r, true);
    
    // Extract useful content
    if (isset($d["content"])) $results[$tn] = $d["content"];
    elseif (isset($d["response"])) $results[$tn] = $d["response"];
    elseif (isset($d["pass"])) $results[$tn] = "PASS:" . $d["pass"] . "/" . $d["total"] . " (" . $d["pct"] . "%)";
    elseif (isset($d["alive"])) $results[$tn] = "ALIVE:" . $d["alive"] . "/" . $d["total"] . " (" . $d["pct"] . "%)";
    elseif (isset($d["warming"])) $results[$tn] = "Office: " . $d["warming"] . " warming | " . $d["active"] . " active | " . $d["health"];
    elseif (is_string($r) && strlen($r) > 5) $results[$tn] = substr($r, 0, 500);
    else $results[$tn] = "executed";
}

// 5. Format response
$output = "";
foreach ($results as $tn => $r) {
    $output .= strtoupper($tn) . ":\n" . $r . "\n\n";
}

echo json_encode([
    "content" => trim($output) ?: "Aucun outil correspondant",
    "tools_called" => array_keys($results),
    "tools_count" => count($results),
    "routing" => "LLM tool-use (Groq llama-3.3-70b)",
    "summary" => $summary ?? ""
]);
?>