<?php
// Setup error reporting untuk debugging
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);

include __DIR__ . "/../../config/whatsapp_api.php";
include __DIR__ . "/../../config/connect.php";
include __DIR__ . "/ResponAI.php";


try {
    $data = file_get_contents('php://input');
    $json_data = json_decode($data, true);
    $datajson = json_encode($json_data);

    if (!isset($json_data['results']['apiKey'])) {
        http_response_code(400);
        echo "apiKey tidak ditemukan.";
        exit;
    }

    $apiKey = $json_data['results']['apiKey'];

    if (
        isset($json_data['type']) && $json_data['type'] === 'message' &&
        isset($json_data['results']['isGroupMsg']) && $json_data['results']['isGroupMsg'] === false
    ) {
        $sender = $json_data['results']['sender'] ?? 'Tidak diketahui';
        $sender = str_replace("@s.whatsapp.net", "", $sender);
        $body = $json_data['results']['body'] ?? '';

        $ResAI = new ResponAI($pdo);
        $cekReplied = $ResAI->get_replied($sender);

        // CASE 1: Pesan dari CS / manusia
        if (isset($json_data['results']['fromMe']) && $json_data['results']['fromMe'] === true) {
            
            $senderreply = $json_data['results']['chatId'] ?? 'Tidak diketahui';
            $senderreply = str_replace("@s.whatsapp.net", "", $senderreply);
            // Skip AI trigger jika pesan mengandung tag AI
            if (strpos($body, '# CS ~ Asisten') === false) {
                // Update chat_replied langsung
                $ResAI->simpan_replied($senderreply, 'Person');
            }
            http_response_code(200);
            exit;
        }

        // CASE 2: Pesan dari user / client
        if (isset($json_data['results']['fromMe']) && $json_data['results']['fromMe'] === false) {
            // Cek apakah AI boleh membalas
            $aiCanReply = true;
            if ($cekReplied) {
                // Kalau yang terakhir membalas Asisten AI dan belum timeout → AI skip
                if ($cekReplied['replied'] === 'Person' && $cekReplied['update_time'] > date('Y-m-d H:i:s')) {
                    $aiCanReply = false;
                }
            }

            if ($aiCanReply) {
                try {
                    $Respon = $ResAI->respon_chat($body, $sender, $apiKey);
                    if (!empty($Respon['id']) && !empty($Respon['nomor'])) {
                        if (!class_exists('PesanWA')) {
                            file_put_contents(__DIR__ . "/error.log", date('Y-m-d H:i:s') . " Class PesanWA tidak ditemukan!\n", FILE_APPEND);
                            http_response_code(500);
                            exit("Server error: PesanWA class missing");
                        }

                        $API_WA = new PesanWA();
                        $send_result = $API_WA->Send_Pesan($Respon['id'], 'sendMessage', array($Respon['nomor']), $Respon['respon'] . "\n\n_# CS ~ Asisten🙏_");

                        // Update chat_replied → terakhir dibalas AI
                        $ResAI->simpan_replied($sender, 'Asisten AI');
                    }
                } catch (Exception $e) {
                    file_put_contents(__DIR__ . "/error.log", date('Y-m-d H:i:s') . " Exception ResponAI / Send_Pesan: " . $e->getMessage() . "\n", FILE_APPEND);
                    http_response_code(500);
                    exit("Server error: gagal proses AI");
                }
            }
            http_response_code(200);
            exit;
        }
    } else {
        http_response_code(400);
        echo "Data tidak valid atau bukan pesan yang diinginkan.";
        exit;
    }

} catch (Throwable $t) {
    file_put_contents(__DIR__ . "/error.log", date('Y-m-d H:i:s') . " Fatal error index: " . $t->getMessage() . "\n", FILE_APPEND);
    http_response_code(500);
    echo "Server error: " . $t->getMessage();
    exit;
}