<?php
/**
 * File: UnsubscribeController.php
 * Version: 1.0
 * Path: app/Controllers/
 * Purpose: Handles newsletter unsubscribe confirmation and processing.
 * Project: Wizdom Networks Website
 */

namespace WizdomNetworks\WizeWeb\Controllers;

use WizdomNetworks\WizeWeb\Core\View;
use WizdomNetworks\WizeWeb\Utils\Database;
use WizdomNetworks\WizeWeb\Utils\Logger;
use WizdomNetworks\WizeWeb\Utils\ErrorHandler;

class UnsubscribeController
{
    /**
     * GET /unsubscribe
     * Show confirmation form for unsubscribing.
     */
    public function confirm(): void
    {
        try {
            $email = trim($_GET['email'] ?? '');

            if (empty($email)) {
                Logger::error("Unsubscribe access without email.");
                View::render('pages/unsubscribe_failed', ['reason' => 'No email provided.']);
                return;
            }

            $db = Database::getConnection();
            $stmt = $db->prepare("SELECT is_verified, unsubscribed_at FROM subscribers WHERE email = ?");
            $stmt->execute([$email]);
            $subscriber = $stmt->fetch();

            if (!$subscriber) {
                Logger::error("Unsubscribe: Subscriber not found [$email]");
                View::render('pages/unsubscribe_failed', ['reason' => 'Subscriber not found.']);
                return;
            }

            if ($subscriber['unsubscribed_at']) {
                View::render('pages/unsubscribe_success', ['email' => $email, 'alreadyUnsubscribed' => true]);
                return;
            }

            View::render('pages/unsubscribe_confirm', ['email' => $email]);
        } catch (\Throwable $e) {
            Logger::error("Unsubscribe view error: " . $e->getMessage());
            ErrorHandler::exception($e);
            View::render('pages/unsubscribe_failed', ['reason' => 'An unexpected error occurred.']);
        }
    }

    /**
     * POST /unsubscribe
     * Perform the actual unsubscribe action.
     */
    public function process(): void
    {
        try {
            $email = trim($_POST['email'] ?? '');
            $reason = trim($_POST['unsubscribe_reason'] ?? '');

            if (empty($email)) {
                Logger::error("Unsubscribe form submitted without email.");
                View::render('pages/unsubscribe_failed', ['reason' => 'No email address was provided.']);
                return;
            }

            $db = Database::getConnection();
            $stmt = $db->prepare("SELECT id FROM subscribers WHERE email = ?");
            $stmt->execute([$email]);
            $subscriber = $stmt->fetch();

            if (!$subscriber) {
                Logger::error("Unsubscribe: Subscriber not found during processing [$email]");
                View::render('pages/unsubscribe_failed', ['reason' => 'Subscriber not found.']);
                return;
            }

            $stmt = $db->prepare("UPDATE subscribers SET unsubscribed_at = NOW(), unsubscribe_reason = ? WHERE id = ?");
            $stmt->execute([$reason, $subscriber['id']]);

            Logger::info("Subscriber unsubscribed: $email");
            View::render('pages/unsubscribe_success', ['email' => $email]);
        } catch (\Throwable $e) {
            Logger::error("Unsubscribe processing error for $email: " . $e->getMessage());
            ErrorHandler::exception($e);
            View::render('pages/unsubscribe_failed', ['reason' => 'An error occurred while processing your unsubscribe.']);
        }
    }
}