<?php

namespace App\View\Composers;

use App\Models\User;
use App\Services\Identity\IdentityClient;
use App\Services\Mailbox\MailboxClient;
use Illuminate\View\View;

class MailboxLinkComposer
{
    public function __construct(
        private IdentityClient $identity,
        private MailboxClient $mailboxes,
    ) {}

    public function compose(View $view): void
    {
        $account = ladill_account();
        $status = ['show_reminder' => false];
        $dismissed = (bool) session('mailbox_link_banner_dismissed', false);

        if ($account?->public_id) {
            $mailboxOptions = [];

            try {
                $mailboxOptions = $this->mailboxes->forUser((string) $account->public_id);
            } catch (\Throwable $e) {
                report($e);
            }

            try {
                $status = $this->identity->mailboxLinkStatus((string) $account->public_id);
            } catch (\Throwable $e) {
                report($e);
                $status = $this->localMailboxLinkStatus($account, $mailboxOptions);
            }

            if (! ($status['show_reminder'] ?? false) && $this->localNeedsMailboxLink($account, $mailboxOptions, $status)) {
                $status['show_reminder'] = true;
                $status['stage'] = $status['stage'] ?? 'needs_link';
                $status['account_email'] = $status['account_email'] ?? $account->email;
            }
        }

        $view->with('mailboxLinkReminder', [
            ...$status,
            'visible' => ($status['show_reminder'] ?? false) && ! $dismissed,
        ]);
    }

    /** @param  array<int, array<string, mixed>>  $mailboxOptions */
    private function localNeedsMailboxLink(User $account, array $mailboxOptions, array $status): bool
    {
        if ($status['linked_mailbox'] ?? null) {
            return false;
        }

        $email = strtolower(trim($account->email ?? ''));
        if ($email === '') {
            return false;
        }

        foreach ($mailboxOptions as $mailbox) {
            if (strtolower((string) ($mailbox['address'] ?? '')) === $email) {
                return false;
            }
        }

        return count($mailboxOptions) > 0;
    }

    /** @param  array<int, array<string, mixed>>  $mailboxOptions */
    /** @return array<string, mixed> */
    private function localMailboxLinkStatus(User $account, array $mailboxOptions): array
    {
        $needsLink = $this->localNeedsMailboxLink($account, $mailboxOptions, []);

        return [
            'show_reminder' => $needsLink,
            'stage' => count($mailboxOptions) > 0 ? 'needs_link' : 'needs_mailbox',
            'linked_mailbox' => null,
            'account_email' => $account->email,
        ];
    }
}