<?php

include __DIR__ . "/../../config/whatsapp_api.php";
include __DIR__ . "/respon_ai.php";

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

// Simpan log raw input untuk debug paling awal
// file_put_contents(__DIR__ . "/debug_raw_input.log", date('Y-m-d H:i:s') . " Input:\n" . print_r(file_get_contents('php://input'), true) . "\n", FILE_APPEND);

try {
    // Ambil dan decode input JSON
    $data = file_get_contents('php://input');
    $json_data = json_decode($data, true);

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

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

    // file_put_contents(__DIR__ . "/debug_apikey.log", date('Y-m-d H:i:s') . " apiKey: $apiKey\n", FILE_APPEND);

    if (
        isset($json_data['type']) && $json_data['type'] === 'message' &&
        isset($json_data['results']['fromMe']) && $json_data['results']['fromMe'] === false &&
        isset($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'] ?? '';

        // file_put_contents(__DIR__ . "/debug_sender_body.log", date('Y-m-d H:i:s') . " Sender: $sender, Body: $body\n", FILE_APPEND);

        $filtered = [
            'sender' => $sender,
            'body'   => $body,
            'apiKey' => $apiKey
        ];

        $log_file = __DIR__ . "/" . $apiKey . ".log";
        $log_entry = "[" . date('Y-m-d H:i:s') . "] Masuk: " . print_r($filtered, true);

        // Pastikan kelas ResponAI ada
        if (!class_exists('ResponAI')) {
            file_put_contents(__DIR__ . "/error.log", date('Y-m-d H:i:s') . " Class ResponAI tidak ditemukan!\n", FILE_APPEND);
            http_response_code(500);
            exit("Server error: ResponAI class missing");
        }

        $ResAI = new ResponAI();

        // Tangkap exception saat proses respon_chat
        try {
            $Respon = $ResAI->respon_chat($body, $sender, $apiKey);
        } catch (Exception $e) {
            file_put_contents(__DIR__ . "/error.log", date('Y-m-d H:i:s') . " Exception ResponAI: " . $e->getMessage() . "\n", FILE_APPEND);
            http_response_code(500);
            exit("Server error: gagal proses AI");
        }

        // file_put_contents(__DIR__ . "/step2_respon_ai.log", date('Y-m-d H:i:s') . " " . print_r($Respon, true), FILE_APPEND);

        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();

            try {
                $send_result = $API_WA->Send_Pesan($Respon['id'], 'sendMessage', array($Respon['nomor']), $Respon['respon']);
            } catch (Exception $e) {
                file_put_contents(__DIR__ . "/error.log", date('Y-m-d H:i:s') . " Exception Send_Pesan: " . $e->getMessage() . "\n", FILE_APPEND);
                http_response_code(500);
                exit("Server error: gagal kirim pesan");
            }

            // file_put_contents(__DIR__ . "/step3_send_pesan.log", date('Y-m-d H:i:s') . " Kirim pesan ke: {$Respon['nomor']}\nResponse Send_Pesan: " . print_r($send_result, true), FILE_APPEND);

            $log_entry .= "[" . date('Y-m-d H:i:s') . "] Balasan AI: " . print_r($Respon, true) . PHP_EOL;
            // file_put_contents($log_file, $log_entry, FILE_APPEND);

            http_response_code(200);
            exit;

        } else {
            // file_put_contents(__DIR__ . "/error_send_pesan.log", date('Y-m-d H:i:s') . " Gagal kirim pesan, id atau nomor kosong: " . print_r($Respon, true) . "\n", FILE_APPEND);
            http_response_code(500);
            echo "Gagal mengirim pesan: data tidak lengkap.";
            exit;
        }
    } else {
        http_response_code(400);
        echo "Data tidak valid atau bukan pesan yang diinginkan.";
        exit;
    }
} catch (Throwable $t) {
    // Tangkap semua error fatal / throwable
    file_put_contents(__DIR__ . "/error.log", date('Y-m-d H:i:s') . " Fatal error: " . $t->getMessage() . "\n", FILE_APPEND);
    http_response_code(500);
    echo "Server error: " . $t->getMessage();
    exit;
}