<?php
/*
Plugin Name: CSV Importer
Description: A simple plugin to import data from CSV files.
Version: 1.0
Author: Your Name
*/

if (!defined('ABSPATH')) {
    exit; // Exit if accessed directly
}

// Add an admin menu for the CSV Importer
add_action('admin_menu', 'csv_importer_add_menu');
function csv_importer_add_menu() {
    add_menu_page(
        'CSV Importer',
        'CSV Importer',
        'manage_options',
        'csv-importer',
        'csv_importer_admin_page',
        'dashicons-upload',
        20
    );
}

// Display the admin page for CSV Importer
function csv_importer_admin_page() {
    if (!current_user_can('manage_options')) {
        return;
    }

    echo '<div class="wrap">';
    echo '<h1>CSV Importer</h1>';
    
    if (isset($_POST['submit_csv'])) {
        if (isset($_FILES['csv_file']) && $_FILES['csv_file']['error'] === UPLOAD_ERR_OK) {
            $csv_file = $_FILES['csv_file']['tmp_name'];
            $result = csv_importer_process_file($csv_file);
            if ($result) {
                echo '<div class="updated"><p>CSV imported successfully!</p></div>';
            } else {
                echo '<div class="error"><p>Failed to import CSV.</p></div>';
            }
        } else {
            echo '<div class="error"><p>Please upload a valid CSV file.</p></div>';
        }
    }

    echo '<form method="post" enctype="multipart/form-data">';
    echo '<input type="file" name="csv_file" accept=".csv" required />';
    echo '<input type="submit" name="submit_csv" class="button-primary" value="Import CSV" />';
    echo '</form>';
    echo '</div>';
}

// Process the uploaded CSV file
function csv_importer_process_file($csv_file) {
    if (!file_exists($csv_file) || !is_readable($csv_file)) {
        return false;
    }

    $data = [];
    $header = null;

    if (($handle = fopen($csv_file, 'r')) !== false) {
        while (($row = fgetcsv($handle, 1000, ',')) !== false) {
            if (!$header) {
                $header = $row;
            } else {
                $data[] = array_combine($header, $row);
            }
        }
        fclose($handle);
    }

    if (!empty($data)) {
        foreach ($data as $row) {
            // Example: Insert data into a custom post type or table
            wp_insert_post([
                'post_type' => 'post', // Change to your desired post type
                'post_title' => $row['Title'], // Adjust for your CSV headers
                'post_content' => $row['Content'], // Adjust for your CSV headers
                'post_status' => 'publish'
            ]);
        }
        return true;
    }
    return false;
}