<?php

namespace Modules\MarketingAddon\App\WhatsappGateways;

use Illuminate\Support\Facades\Http;

class AiSensy
{
    public static function send_message($gateway, $phone, $template, $name, $data)
    {
        $payload = [
            'apiKey'         => $gateway->params['api_key'],
            'campaignName'   => $template->template,
            'destination'    => $phone,
            'userName'       => $name,
            'templateParams' => self::buildParams($template, $data),
            'buttons'        => self::aiSensyButtons($data['copy_text'] ?? ''),
            'media'          => self::buildMedia($template),
        ];

        // 🔍 Log payload before sending
        \Illuminate\Support\Facades\Log::info('AiSensy Payload', $payload);

        $response = Http::withHeaders([
            'Content-Type' => 'application/json',
        ])->post(
            'https://backend.aisensy.com/campaign/t1/api/v2',
            $payload
        );

        if ($response->successful()) {
            return $response->json();
        }

        throw new \Exception(
            'AiSensy Error: ' . $response->body()
        );
    }

    /**
     * Convert named data → positional params (WhatsApp only)
     */
    protected static function buildParams($template, array $data): array
    {
        if (empty($template->variables) || !is_array($template->variables)) {
            return [];
        }

        $params = [];

        foreach ($template->variables as $variable) {
            // Skip button-related vars
            if (in_array($variable, ['copy_text', 'expire_at'])) {
                continue;
            }

            if (!isset($data[$variable])) {
                continue;
            }

            $params[] = $data[$variable];
        }

        return $params;
    }

    protected static function aiSensyButtons(? string $copyText = null)
    {
        if (!$copyText) {
            return [];
        }

        return [
            [
                'type' => 'button',
                'sub_type' => 'url',
                'index' => 0,
                'parameters' => [
                    [
                        'type' => 'text',
                        'text' => $copyText ?? ''
                    ]
                ]
            ]
        ];
    }

    protected static function buildMedia($template): ?array
    {
        if (empty($template?->attachment)) {
            return null;
        }

        return [
            'url' => asset($template->attachment),
            'filename' => 'sample_media',
        ];
    }
}