<?php

namespace App\Libraries;

use CodeIgniter\HTTP\CURLRequest;

class WablasService
{
    protected string $token;
    protected string $secretKey;
    protected string $baseUrl = 'https://tegal.wablas.com/api/v2';
    protected $externalApi;
    
    public function __construct()
    {
        $this->externalApi = new \Config\ExternalApi();
        $this->token = env('WABLAS_TOKEN') ?: $this->externalApi->wablasToken;        
        $this->secretKey = env('WABLAS_SECRET_KEY') ?: $this->externalApi->WablasSecretKey;

        if (empty($this->token) || empty($this->secretKey)) {
            throw new \Exception('Unauthorized');
        }
    }

    // Kirim pesan teks biasa (single)
    public function sendText(string $phone, string $message, bool $isGroup = false): array
    {
        return $this->sendBulkText([['phone' => $phone, 'message' => $message, 'isGroup' => $isGroup ? 'true' : 'false']]);
    }

    // Kirim pesan teks massal (multiple)
    public function sendBulkText(array $messages): array
    {
        $formatted = [];
        foreach ($messages as $msg) {
            if (!isset($msg['phone']) || !isset($msg['message'])) {
                throw new \InvalidArgumentException('Setiap pesan harus memiliki "phone" dan "message"');
            }
            $formatted[] = [
                'phone' => $this->sanitizePhone($msg['phone']),
                'message' => $msg['message'],
                'isGroup' => $msg['isGroup'] ?? 'false'
            ];
        }

        return $this->makeRequest('/send-message', ['data' => $formatted]);
    }

    // Kirim OTP atau template message
    public function sendTemplate(string $phone, string $content, string $title = 'Verification Code', string $footer = 'Supported by Wablas', string $code = ''): array
    {
        $message = [
            'title' => [
                'type' => 'text',
                'content' => $title
            ],
            'content' => $content,
            'footer' => $footer
        ];

        // Hanya tambahkan buttons jika code ada
        if (!empty($code)) {
            $message['buttons'] = [
                'url' => [
                    'display' => 'Copy',
                    'link' => "https://www.whatsapp.com/otp/copy/" . $code
                ]
            ];
        }

        $payload = [
            'data' => [
                [
                    'phone' => $this->sanitizePhone($phone),
                    'message' => $message
                ]
            ]
        ];

        return $this->makeRequest('/send-template', $payload);
    }

    // Kirim OTP sederhana - PERSIS SEPERTI DOKUMENTASI
    public function sendOTP(string $phone, string $code, string $title = 'Verification Code'): array
    {
        $phone = $this->sanitizePhone($phone);
        
        $message = [
            'title' => [
                'type' => 'text',
                'content' => $title,
            ],
            'buttons' => [
                'url' => [
                    'display' => 'Copy',
                    'link' => "https://www.whatsapp.com/otp/copy/" . $code,
                ],
            ],
            'content' => "Your verification code : $code",
            'footer' => 'Supported by Wablas',
        ];

        $payload = [
            'data' => [
                [
                    'phone' => $phone,
                    'message' => $message
                ]
            ]
        ];

        return $this->makeRequest('/send-message', $payload);
    }

    // Fungsi internal untuk eksekusi API
    protected function makeRequest(string $endpoint, array $payload): array
    {
        $curl = \Config\Services::curlrequest();

        try {
            $response = $curl->post($this->baseUrl . $endpoint, [
                'headers' => [
                    'Authorization' => $this->token . '.' . $this->secretKey,
                    'Content-Type' => 'application/json'
                ],
                'json' => $payload,
                'verify' => false // Sama seperti CURLOPT_SSL_VERIFYPEER = 0
            ]);

            $result = json_decode($response->getBody(), true);
            $statusCode = $response->getStatusCode();

            return [
                'success' => ($statusCode === 200 && !empty($result)),
                'data' => $result,
                'http_code' => $statusCode
            ];
        } catch (\Exception $e) {
            return [
                'success' => false,
                'error' => $e->getMessage()
            ];
        }
    }

    // Bersihkan nomor HP ke format internasional
    protected function sanitizePhone(string $phone): string
    {
        $phone = preg_replace('/[^0-9]/', '', $phone);
        if (substr($phone, 0, 2) === '08') {
            $phone = '62' . substr($phone, 1);
        } elseif (substr($phone, 0, 1) === '8') {
            $phone = '62' . $phone;
        }
        return $phone;
    }
}