<?php
/**
 * BRAIN-AWARE SEND WRAPPER
 * Wraps unified send with Brain Config placeholder resolution
 * Endpoint: /api/brain-smart-send.php?action=send|test|preview
 */
header('Content-Type: application/json');
header('Access-Control-Allow-Origin: *');

define('DB_HOST','127.0.0.1');
define('DB_NAME','adx_system');
define('DB_USER','postgres');
define('DB_PASS','');
define('TRACKING_DOMAIN','culturellemejean.charity');

$ISP_MAP = [
'gmx.de'=>'GMX','gmx.net'=>'GMX','gmx.com'=>'GMX','web.de'=>'WEB.DE','freenet.de'=>'FREENET',
't-online.de'=>'T-ONLINE','magenta.de'=>'T-ONLINE','orange.fr'=>'ORANGE','wanadoo.fr'=>'ORANGE',
'laposte.net'=>'LAPOSTE','sfr.fr'=>'SFR','free.fr'=>'FREE','aliceadsl.fr'=>'ALICE',
'gmail.com'=>'GMAIL','googlemail.com'=>'GMAIL','outlook.com'=>'OUTLOOK','hotmail.com'=>'OUTLOOK',
'hotmail.fr'=>'OUTLOOK','live.com'=>'OUTLOOK','live.fr'=>'OUTLOOK','msn.com'=>'OUTLOOK',
'yahoo.com'=>'YAHOO','yahoo.fr'=>'YAHOO','ymail.com'=>'YAHOO','aol.com'=>'AOL',
'ziggo.nl'=>'ZIGGO','kpnmail.nl'=>'KPN','libero.it'=>'LIBERO','btinternet.com'=>'BT',
'icloud.com'=>'ICLOUD','protonmail.com'=>'PROTON','proton.me'=>'PROTON','bluewin.ch'=>'BLUEWIN',
];

$db = new PDO("pgsql:host=".DB_HOST.";dbname=".DB_NAME,DB_USER,DB_PASS);
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

$input = json_decode(file_get_contents('php://input'), true) ?: array_merge($_POST, $_GET);
$action = $input['action'] ?? 'preview';

function resolvePlaceholders($text, $to, $domain) {
    $eb64 = base64_encode($to);
    $fn = ucfirst(explode('@', $to)[0]);
    $map = [
        '[email]'=>$to, '[email_b64]'=>$eb64, '[domain]'=>$domain, '[rdns]'=>$domain,
        '[fname]'=>$fn, '[lname]'=>'', '[Name]'=>$fn, '[first_name]'=>$fn, '[last_name]'=>'',
        '[company]'=>'WEVADS', '[mail_date]'=>date('r'), '[date]'=>date('d/m/Y'), '[time]'=>date('H:i'),
        '[a_7]'=>substr(str_shuffle('abcdefghijklmnopqrstuvwxyz'),0,7),
        '[n_5]'=>str_pad(rand(0,99999),5,'0',STR_PAD_LEFT),
        '[n_3]'=>str_pad(rand(0,999),3,'0',STR_PAD_LEFT),
        '[a_3]'=>substr(str_shuffle('abcdefghijklmnopqrstuvwxyz'),0,3),
    ];
    return str_replace(array_keys($map), array_values($map), $text);
}

function getBrainConfig($db, $isp) {
    $st = $db->prepare("SELECT * FROM admin.brain_configs WHERE isp_target=:i AND is_active=TRUE AND is_winner=TRUE ORDER BY inbox_rate DESC LIMIT 1");
    $st->execute([':i'=>$isp]);
    return $st->fetch(PDO::FETCH_ASSOC);
}

function detectISP($email) {
    global $ISP_MAP;
    $d = strtolower(substr($email, strrpos($email, '@')+1));
    return $ISP_MAP[$d] ?? 'UNKNOWN';
}

function buildFullHeaders($cfg, $to, $domain) {
    $h = "MIME-Version: 1.0\r\n";
    $h .= "Message-Id: <" . substr(str_shuffle('abcdefghijklmnopqrstuvwxyz'),0,7) . str_pad(rand(0,99999),5,'0',STR_PAD_LEFT) . str_pad(rand(0,999),3,'0',STR_PAD_LEFT) . substr(str_shuffle('abcdefghijklmnopqrstuvwxyz'),0,3) . base64_encode($to) . "@" . $domain . ">\r\n";
    $h .= "From: " . ($cfg['from_name'] ?: '"Service"') . " <" . ($cfg['from_email'] ?: "info@$domain") . ">\r\n";
    $h .= "Subject: " . ($cfg['subject_template'] ?: 'Notification') . "\r\n";
    $h .= "To: $to\r\n";
    $enc = $cfg['encoding'] ?: 'quoted-printable';
    $h .= "Content-Transfer-Encoding: $enc\r\n";
    $ct = $cfg['content_type'] ?: 'multipart/alternative';
    $charset = $cfg['charset'] ?: 'utf-8';
    if (strpos($ct,'charset')===false && strpos($ct,'multipart')===false) $ct .= "; charset=$charset";
    $h .= "Content-Type: $ct\r\n";
    $h .= "Date: " . date('r') . "\r\n";
    for ($i=1;$i<=5;$i++) {
        $n=$cfg["header_{$i}_name"]??''; $v=$cfg["header_{$i}_value"]??'';
        if ($n && $v) $h .= "$n: $v\r\n";
    }
    return resolvePlaceholders($h, $to, $domain);
}

switch($action) {
case 'preview':
    $to = $input['to'] ?? 'test@gmail.com';
    $isp = detectISP($to);
    $cfg = getBrainConfig($db, $isp);
    if (!$cfg) { echo json_encode(['error'=>"No brain config for ISP: $isp"]); break; }
    $headers = buildFullHeaders($cfg, $to, TRACKING_DOMAIN);
    $body = resolvePlaceholders($cfg['body_template'] ?? '<p>No body</p>', $to, TRACKING_DOMAIN);
    echo json_encode([
        'isp'=>$isp, 'config_id'=>$cfg['id'], 'inbox_rate'=>$cfg['inbox_rate'],
        'headers'=>$headers, 'body'=>$body, 'send_method'=>$cfg['send_method'],
        'placeholders_resolved'=>true
    ]);
    break;

case 'send':
    $to = $input['to'] ?? '';
    if (!$to) { echo json_encode(['error'=>'Missing to']); break; }
    $isp = detectISP($to);
    $cfg = getBrainConfig($db, $isp);
    
    // Build resolved parameters
    $dom = TRACKING_DOMAIN;
    $from = $cfg ? (($cfg['from_name'] ?: '"Service"') . ' <' . ($cfg['from_email'] ?: "info@$dom") . '>') : "send@$dom";
    $subj = $cfg['subject_template'] ?? ($input['subject'] ?? 'Notification');
    $html = $cfg['body_template'] ?? ($input['html'] ?? '<p>Test</p>');
    
    $from = resolvePlaceholders($from, $to, $dom);
    $subj = resolvePlaceholders($subj, $to, $dom);
    $html = resolvePlaceholders($html, $to, $dom);
    
    // Delegate to unified send
    $payload = json_encode(['action'=>'send','to'=>$to,'from'=>$from,'subject'=>$subj,'html'=>$html,'method'=>$input['method']??'auto']);
    $ch = curl_init('http://127.0.0.1:5890/api/brain-unified-send.php');
    curl_setopt_array($ch, [CURLOPT_POST=>true, CURLOPT_POSTFIELDS=>$payload, CURLOPT_RETURNTRANSFER=>true, CURLOPT_HTTPHEADER=>['Content-Type: application/json']]);
    $resp = curl_exec($ch); curl_close($ch);
    $result = json_decode($resp, true) ?: ['error'=>'Send failed'];
    $result['brain_config_id'] = $cfg['id'] ?? null;
    $result['isp'] = $isp;
    $result['placeholders_resolved'] = true;
    echo json_encode($result);
    break;

case 'warmup_send':
    // For warmup: use brain config but with warmup-safe content
    $to = $input['to'] ?? '';
    if (!$to) { echo json_encode(['error'=>'Missing to']); break; }
    $isp = detectISP($to);
    $cfg = getBrainConfig($db, $isp);
    $dom = TRACKING_DOMAIN;
    
    // Warmup uses the same headers but simpler body
    $from = $cfg ? (($cfg['from_name'] ?: '"Service"') . ' <' . ($cfg['from_email'] ?: "info@$dom") . '>') : "send@$dom";
    $subj = $cfg['subject_template'] ?? 'Hello';
    $html = '<html><body><p>Thank you for your interest. Please visit our website for more information.</p></body></html>';
    
    $from = resolvePlaceholders($from, $to, $dom);
    $subj = resolvePlaceholders($subj, $to, $dom);
    
    $payload = json_encode(['action'=>'send','to'=>$to,'from'=>$from,'subject'=>$subj,'html'=>$html,'method'=>$input['method']??'auto','campaign_id'=>0]);
    $ch = curl_init('http://127.0.0.1:5890/api/brain-unified-send.php');
    curl_setopt_array($ch, [CURLOPT_POST=>true, CURLOPT_POSTFIELDS=>$payload, CURLOPT_RETURNTRANSFER=>true, CURLOPT_HTTPHEADER=>['Content-Type: application/json']]);
    $resp = curl_exec($ch); curl_close($ch);
    echo $resp;
    break;

default:
    echo json_encode(['actions'=>['preview','send','warmup_send'],'usage'=>'?action=preview&to=test@gmail.com']);
}