<?php

namespace App\Services\Billing;

use Illuminate\Support\Facades\Http;
use Illuminate\Support\Facades\Log;

class PlatformEmailClient
{
    private ?string $lastError = null;

    public function lastError(): ?string
    {
        return $this->lastError;
    }

    private function base(): string
    {
        return rtrim((string) config('smtp.platform_api_url', 'https://ladill.com/api/smtp'), '/');
    }

    private function token(): string
    {
        return (string) config('smtp.platform_api_key', '');
    }

    public function send(string $ownerPublicId, string $to, string $subject, string $html, ?string $text = null): bool
    {
        $this->lastError = null;

        if (! $this->isConfigured()) {
            $this->lastError = 'Outbound email is not configured on this Events instance.';

            return false;
        }

        try {
            $res = Http::withToken($this->token())->acceptJson()->timeout(30)
                ->post($this->base().'/messages/send', array_filter([
                    'user' => $ownerPublicId,
                    'from' => config('smtp.from'),
                    'from_name' => config('smtp.from_name'),
                    'to' => $to,
                    'subject' => $subject,
                    'html' => $html,
                    'text' => $text,
                ]));

            if ($res->status() === 402) {
                $this->lastError = (string) ($res->json('error') ?: 'Insufficient Bird email credits. Add funds in Billing and try again.');
                Log::warning('Platform email send: insufficient balance', ['user' => $ownerPublicId]);

                return false;
            }

            if ($res->failed()) {
                $this->lastError = (string) ($res->json('error') ?: 'The email could not be sent. Please try again.');
                Log::warning('Platform email send failed', ['status' => $res->status(), 'body' => $res->body()]);

                return false;
            }

            return (bool) ($res->json('success') ?? true);
        } catch (\Throwable $e) {
            $this->lastError = 'The email could not be sent. Please try again.';
            Log::warning('Platform email send error', ['error' => $e->getMessage()]);

            return false;
        }
    }

    public function isConfigured(): bool
    {
        return $this->token() !== '';
    }
}