<?php

declare(strict_types=1);

namespace App\Support\ReviewPacks;

final class ManagementReportPdfRuntimeGate
{
    /**
     * @return array{
     *     enabled: bool,
     *     driver: string,
     *     runtime_validated: bool,
     *     is_blocked: bool,
     *     reason_code: ?string,
     *     reason: ?string
     * }
     */
    public function decision(): array
    {
        $enabled = (bool) config('tenantpilot.pdf_renderer.enabled', false);
        $driver = trim((string) config('tenantpilot.pdf_renderer.driver', 'gotenberg'));
        $runtimeValidated = (bool) config('tenantpilot.pdf_renderer.runtime_validated', false);

        if (! $enabled) {
            return $this->blocked($enabled, $driver, $runtimeValidated, 'renderer_disabled', 'PDF rendering is disabled for this environment.');
        }

        if ($driver !== 'gotenberg') {
            return $this->blocked($enabled, $driver, $runtimeValidated, 'renderer_driver_unsupported', 'The configured PDF renderer driver is not supported.');
        }

        if (! $runtimeValidated) {
            return $this->blocked($enabled, $driver, $runtimeValidated, 'runtime_validation_missing', 'Management PDF generation is blocked until the Gotenberg runtime is validated on Staging.');
        }

        return [
            'enabled' => $enabled,
            'driver' => $driver,
            'runtime_validated' => $runtimeValidated,
            'is_blocked' => false,
            'reason_code' => null,
            'reason' => null,
        ];
    }

    /**
     * @return array{
     *     enabled: bool,
     *     driver: string,
     *     runtime_validated: bool,
     *     is_blocked: bool,
     *     reason_code: string,
     *     reason: string
     * }
     */
    private function blocked(bool $enabled, string $driver, bool $runtimeValidated, string $reasonCode, string $reason): array
    {
        return [
            'enabled' => $enabled,
            'driver' => $driver,
            'runtime_validated' => $runtimeValidated,
            'is_blocked' => true,
            'reason_code' => $reasonCode,
            'reason' => $reason,
        ];
    }
}