<?php

declare(strict_types=1);

namespace Modules\Helpdesk\Http\Controllers;

use App\Http\Controllers\Controller;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Gate;
use Illuminate\Validation\Rule;
use Modules\Helpdesk\Models\CannedResponse;
use Modules\Helpdesk\Models\Ticket;
use Modules\Helpdesk\Services\CannedResponseRenderer;
use Modules\Helpdesk\Services\TicketService;

final class TicketCommentStoreController extends Controller
{
    /**
     * Store a ticket conversation comment or nested reply using a normal HTTP POST.
     *
     * This keeps the conversation workflow reliable when rich-editor, Flux, or
     * Livewire JavaScript event handling does not invoke the Livewire method.
     */
    public function __invoke(Request $request, Ticket $ticket, TicketService $tickets, CannedResponseRenderer $renderer): RedirectResponse
    {
        Gate::authorize('comment', $ticket);

        $maxUploadKilobytes = (int) config('helpdesk.max_upload_kb', 10240);
        $allowedMimes = (array) config('helpdesk.allowed_mimes', ['jpg', 'jpeg', 'png', 'pdf', 'txt', 'log', 'zip']);

        $validated = $request->validate([
            'commentBody' => ['nullable', 'string'],
            'internal' => ['nullable', 'boolean'],
            'parent_id' => [
                'nullable',
                'integer',
                Rule::exists('helpdesk_comments', 'id')->where('ticket_id', $ticket->id),
            ],
            'canned_response_id' => ['nullable', 'integer', Rule::exists('helpdesk_canned_responses', 'id')],
            'attachments' => ['nullable', 'array'],
            'attachments.*' => ['file', 'max:'.$maxUploadKilobytes, 'mimes:'.implode(',', $allowedMimes)],
        ]);

        $user = Auth::user();
        abort_if($user === null, 403);

        $body = trim((string) ($validated['commentBody'] ?? ''));

        if ($body === '' && filled($validated['canned_response_id'] ?? null)) {
            $response = CannedResponse::query()
                ->where('is_active', true)
                ->findOrFail((int) $validated['canned_response_id']);

            $body = trim($renderer->render($response->body, $ticket, $user));
        }

        validator(['commentBody' => $body], [
            'commentBody' => ['required', 'string', 'min:2'],
        ])->validate();

        $uploadedFiles = $request->file('attachments', []);
        $uploadedFiles = is_array($uploadedFiles) ? $uploadedFiles : [$uploadedFiles];

        $tickets->comment(
            ticket: $ticket,
            user: $user,
            body: $body,
            internal: (bool) ($validated['internal'] ?? false),
            files: $uploadedFiles,
            parentId: filled($validated['parent_id'] ?? null) ? (int) $validated['parent_id'] : null,
        );

        return redirect()
            ->route('helpdesk.tickets.show', $ticket)
            ->with('ticket-comment-added', filled($validated['parent_id'] ?? null) ? 'Reply posted.' : 'Comment posted.');
    }
}