<?php
@require_once __DIR__ . '/wevia-sanitizer-guard.php'; // WAVE 206 sanitizer guard

// WEVIA DeepSeek Web API — Proxy vers chat.deepseek.com ILLIMITÉ
// Modes: instant, deepthink, search
// Port interne: 8901
header("Content-Type: application/json");
header("Access-Control-Allow-Origin: *");
header("Access-Control-Allow-Headers: Content-Type");
if ($_SERVER['REQUEST_METHOD'] === 'OPTIONS') exit;

$input = json_decode(file_get_contents("php://input"), true);
$message = $input['message'] ?? $_GET['message'] ?? '';
$mode = $input['mode'] ?? $_GET['mode'] ?? 'instant';

if ($_GET['action'] ?? '' === 'health') {
    $h = @file_get_contents('http://127.0.0.1:8901/health', false, stream_context_create(['http'=>['timeout'=>3]]));
    echo $h ?: json_encode(['status' => 'offline', 'error' => 'DeepSeek Web API not running']);
    exit;
}

if ($_GET['action'] ?? '' === 'init') {
    $h = @file_get_contents('http://127.0.0.1:8901/init', false, stream_context_create(['http'=>['timeout'=>15]]));
    echo $h ?: json_encode(['error' => 'init failed']);
    exit;
}

if (!$message) {
    echo json_encode([
        'service' => 'WEVIA DeepSeek Web',
        'modes' => ['instant' => 'Réponse rapide', 'deepthink' => 'Raisonnement profond (CoT)', 'search' => 'Recherche web'],
        'unlimited' => true,
        'cost' => '0€',
        'usage' => 'POST {"message":"votre question","mode":"deepthink"}'
    ]);
    exit;
}

// Call internal DeepSeek Web API service
$ctx = stream_context_create([
    'http' => [
        'method' => 'POST',
        'header' => 'Content-Type: application/json',
        'content' => json_encode(['message' => $message, 'mode' => $mode]),
        'timeout' => 90,
    ]
]);

$response = @file_get_contents('http://127.0.0.1:8901', false, $ctx);

if ($response) {
    $data = json_decode($response, true);
    // Sanitize: replace DeepSeek branding with WEVIA
    if (isset($data['content'])) {
        $data['content'] = str_replace(['DeepSeek', 'deepseek'], ['WEVIA Engine', 'wevia-engine'], $data['content']);
    }
    echo json_encode($data, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT);
} else {
    // Fallback: use existing cascade (Groq/Cerebras/Gemini)
    $fallback_url = 'http://127.0.0.1/api/wevia-deepseek-proxy.php';
    $fallback = @file_get_contents($fallback_url, false, stream_context_create([
        'http' => [
            'method' => 'POST',
            'header' => "Content-Type: application/json\r\nHost: weval-consulting.com",
            'content' => json_encode(['message' => $message, 'mode' => $mode]),
            'timeout' => 30,
        ]
    ]));
    
    $data = $fallback ? json_decode($fallback, true) : ['error' => 'All providers offline'];
    $data['fallback'] = true;
    $data['note'] = 'DeepSeek Web offline, used cascade fallback';
    echo json_encode($data, JSON_UNESCAPED_UNICODE | JSON_PRETTY_PRINT);
}