ladill-servers/app/Services/Afia/AfiaService.php

<?php

namespace App\Services\Afia;

use Illuminate\Support\Facades\Http;
use RuntimeException;

/**
 * Afia — an AI assistant scoped to a Ladill product (hosting or email).
 * Self-contained: builds a product-specific system prompt + live context
 * and calls the configured LLM (OpenAI or Anthropic).
 */
class AfiaService
{
    public function enabled(): bool
    {
        return (bool) config('afia.enabled', true) && (string) config('afia.api_key', '') !== '';
    }

    /**
     * @param  array<int,array{role:string,text:string}>  $history
     * @param  array<string,mixed>  $context
     */
    public function chat(string $message, array $history, array $context): string
    {
        if (! $this->enabled()) {
            throw new RuntimeException('Afia is not configured.');
        }

        $provider = (string) config('afia.provider', 'openai');
        $model = (string) config('afia.model', 'gpt-4o-mini');
        $apiKey = (string) config('afia.api_key');

        $messages = [['role' => 'system', 'content' => $this->systemPrompt($context)]];
        foreach (array_slice($history, -8) as $turn) {
            $role = ($turn['role'] ?? 'user') === 'assistant' ? 'assistant' : 'user';
            $text = trim((string) ($turn['text'] ?? ''));
            if ($text !== '') {
                $messages[] = ['role' => $role, 'content' => $text];
            }
        }
        $messages[] = ['role' => 'user', 'content' => $message];

        return $provider === 'anthropic'
            ? $this->viaAnthropic($model, $apiKey, $messages)
            : $this->viaOpenAi($model, $apiKey, $messages);
    }

    private function viaOpenAi(string $model, string $apiKey, array $messages): string
    {
        $res = Http::withToken($apiKey)->acceptJson()->timeout(45)
            ->post('https://api.openai.com/v1/chat/completions', [
                'model' => $model,
                'temperature' => 0.3,
                'max_tokens' => 600,
                'messages' => $messages,
            ]);

        if ($res->failed()) {
            throw new RuntimeException('OpenAI request failed: '.$res->status());
        }

        return trim((string) $res->json('choices.0.message.content', ''));
    }

    private function viaAnthropic(string $model, string $apiKey, array $messages): string
    {
        $system = $messages[0]['content'];
        $turns = array_values(array_filter($messages, fn ($m) => $m['role'] !== 'system'));

        $res = Http::withHeaders([
            'x-api-key' => $apiKey,
            'anthropic-version' => '2023-06-01',
        ])->acceptJson()->timeout(45)->post('https://api.anthropic.com/v1/messages', [
            'model' => $model,
            'max_tokens' => 600,
            'system' => $system,
            'messages' => array_map(fn ($m) => ['role' => $m['role'], 'content' => $m['content']], $turns),
        ]);

        if ($res->failed()) {
            throw new RuntimeException('Anthropic request failed: '.$res->status());
        }

        return trim((string) $res->json('content.0.text', ''));
    }

    /** @param array<string,mixed> $context */
    private function systemPrompt(array $context): string
    {
        $ctx = collect($context)->map(fn ($v, $k) => "- {$k}: {$v}")->implode("\n");

        return match ((string) config('afia.product', 'hosting')) {
            'email' => $this->emailSystemPrompt($ctx),
            default => $this->hostingSystemPrompt($ctx),
        };
    }

    private function hostingSystemPrompt(string $ctx): string
    {
        return <<<PROMPT
        You are Afia, the assistant inside Ladill Hosting — Ladill's shared web hosting product (hosting.ladill.com).
        Help the user buy hosting, manage accounts, link domains, use the control panel, and understand billing. Be concise,
        friendly, and actionable: give short step-by-step answers and point to the relevant section by name.

        What Ladill Hosting does and where things live:
        - Dashboard: overview of all hosting accounts, pending orders, and linked domains.
        - Product pages: Single Domain, Multi Domain, and WordPress hosting — order new plans here.
        - Account overview: per-account summary (plan, expiry, linked domains, email usage) with a Control Panel button.
        - Control Panel: file manager, domains, databases, SSL, PHP settings, cron, terminal, and one-click apps.
        - Domains: link a Ladill domain or an external domain to a hosting account; DNS may need updating for external domains.
        - Billing: hosting renewals and upgrades are paid from the Ladill wallet (account portal → Wallet).
        - Team: invite teammates to co-manage hosting (sidebar → Team).

        Rules: Only answer questions about Ladill Hosting — plans, accounts, domains on hosting, the control panel,
        SSL, file manager, renewals, and wallet billing. If asked about Ladill Email, domains registration, or VPS/servers,
        briefly redirect to the right Ladill app. Never invent passwords, DNS values, or prices — tell the user where to find them.

        Current user context:
        {$ctx}
        PROMPT;
    }

    private function emailSystemPrompt(string $ctx): string
    {
        return <<<PROMPT
        You are Afia, the assistant inside Ladill Email — Ladill's mailbox product (email.ladill.com).
        Help the user set up email domains, create and manage mailboxes, and understand billing. Be concise,
        friendly, and actionable: give short step-by-step answers and point to the relevant section by name.

        What Ladill Email does and where things live:
        - Domains: add a domain you want email on, then verify it by adding the shown DNS records (MX, SPF,
          DKIM, DMARC). Mailboxes can only be created on a verified domain.
        - Mailboxes: create a mailbox (address + display name + password + quota) on a verified domain. The
          first mailbox is free; extra mailboxes are billed monthly from your Ladill wallet. Manage a mailbox to
          reset its password or see IMAP/SMTP connection settings.
        - Webmail: read & send from a mailbox at mail.ladill.com (Open Ladill Mail).
        - Account: Billing (wallet balance, add funds, monthly mailbox subscriptions), Team (invite teammates to
          co-manage), Settings (default quota, notifications), Developers (API tokens for the Email API).

        Connection settings: IMAP host mail.<domain> port 993 (SSL); SMTP host mail.<domain> port 587
        (STARTTLS); username is the full email address.

        Facts: Mail is delivered by Ladill's mail servers. Prices show in GHS. Login/identity is via the Ladill
        account (SSO). DNS changes can take time to propagate, so verification may not be instant.

        Rules: Only answer questions about Ladill Email — domains for email, DNS verification, mailboxes, webmail,
        IMAP/SMTP setup, team, and billing for mailboxes. If asked about unrelated topics, briefly redirect.
        Never invent passwords, DNS values, or prices — tell the user where to find them. If something needs a
        verified domain or a funded wallet, say so.

        Current user context:
        {$ctx}
        PROMPT;
    }
}