<?php
/**
 * Plugin Name: 30YearWeather Widget
 * Plugin URI: https://30yearweather.com/widgets
 * Description: Embed beautiful weather widgets showing historical climate data for 470+ destinations. Based on 30 years of NASA satellite data.
 * Version: 1.0.2
 * Author: 30YearWeather
 * Author URI: https://30yearweather.com
 * License: GPLv2 or later
 * License URI: https://www.gnu.org/licenses/gpl-2.0.html
 * Text Domain: 30yearweather-widget
 * Requires at least: 5.8
 * Requires PHP: 7.4
 *
 * @package ThirtyYearWeather
 */

// Exit if accessed directly.
if ( ! defined( 'ABSPATH' ) ) {
    exit;
}

// Plugin constants.
define( 'THIRTY_YEAR_WEATHER_VERSION', '1.0.2' );
define( 'THIRTY_YEAR_WEATHER_PLUGIN_DIR', plugin_dir_path( __FILE__ ) );
define( 'THIRTY_YEAR_WEATHER_PLUGIN_URL', plugin_dir_url( __FILE__ ) );
define( 'THIRTY_YEAR_WEATHER_EMBED_BASE', 'https://30yearweather.com/widgets/embed/' );

/**
 * Get list of available cities.
 * Returns an array of city slugs and names.
 *
 * @since 1.0.0
 * @return array Array of cities with slug => name pairs.
 */
function thirty_year_weather_get_cities() {
    // Popular cities - this list can be extended
    return array(
        'prague'        => __( 'Prague, Czech Republic', '30yearweather-widget' ),
        'paris'         => __( 'Paris, France', '30yearweather-widget' ),
        'london'        => __( 'London, United Kingdom', '30yearweather-widget' ),
        'new-york'      => __( 'New York, USA', '30yearweather-widget' ),
        'tokyo'         => __( 'Tokyo, Japan', '30yearweather-widget' ),
        'barcelona'     => __( 'Barcelona, Spain', '30yearweather-widget' ),
        'rome'          => __( 'Rome, Italy', '30yearweather-widget' ),
        'amsterdam'     => __( 'Amsterdam, Netherlands', '30yearweather-widget' ),
        'dubai'         => __( 'Dubai, UAE', '30yearweather-widget' ),
        'bali'          => __( 'Bali, Indonesia', '30yearweather-widget' ),
        'sydney'        => __( 'Sydney, Australia', '30yearweather-widget' ),
        'bangkok'       => __( 'Bangkok, Thailand', '30yearweather-widget' ),
        'lisbon'        => __( 'Lisbon, Portugal', '30yearweather-widget' ),
        'berlin'        => __( 'Berlin, Germany', '30yearweather-widget' ),
        'vienna'        => __( 'Vienna, Austria', '30yearweather-widget' ),
        'budapest'      => __( 'Budapest, Hungary', '30yearweather-widget' ),
        'athens'        => __( 'Athens, Greece', '30yearweather-widget' ),
        'istanbul'      => __( 'Istanbul, Turkey', '30yearweather-widget' ),
        'marrakech'     => __( 'Marrakech, Morocco', '30yearweather-widget' ),
        'cape-town'     => __( 'Cape Town, South Africa', '30yearweather-widget' ),
        'singapore'     => __( 'Singapore', '30yearweather-widget' ),
        'hong-kong'     => __( 'Hong Kong, China', '30yearweather-widget' ),
        'seoul'         => __( 'Seoul, South Korea', '30yearweather-widget' ),
        'kyoto'         => __( 'Kyoto, Japan', '30yearweather-widget' ),
        'dublin'        => __( 'Dublin, Ireland', '30yearweather-widget' ),
        'stockholm'     => __( 'Stockholm, Sweden', '30yearweather-widget' ),
        'copenhagen'    => __( 'Copenhagen, Denmark', '30yearweather-widget' ),
        'florence'      => __( 'Florence, Italy', '30yearweather-widget' ),
        'venice'        => __( 'Venice, Italy', '30yearweather-widget' ),
        'santorini'     => __( 'Santorini, Greece', '30yearweather-widget' ),
        'dubrovnik'     => __( 'Dubrovnik, Croatia', '30yearweather-widget' ),
        'cancun'        => __( 'Cancun, Mexico', '30yearweather-widget' ),
        'miami'         => __( 'Miami, USA', '30yearweather-widget' ),
        'los-angeles'   => __( 'Los Angeles, USA', '30yearweather-widget' ),
        'san-francisco' => __( 'San Francisco, USA', '30yearweather-widget' ),
        'vancouver'     => __( 'Vancouver, Canada', '30yearweather-widget' ),
        'toronto'       => __( 'Toronto, Canada', '30yearweather-widget' ),
        'rio-de-janeiro' => __( 'Rio de Janeiro, Brazil', '30yearweather-widget' ),
        'buenos-aires'  => __( 'Buenos Aires, Argentina', '30yearweather-widget' ),
    );
}

/**
 * Sanitize city slug.
 *
 * @since 1.0.0
 * @param string $city The city slug to sanitize.
 * @return string Sanitized city slug.
 */
function thirty_year_weather_sanitize_city( $city ) {
    $city = sanitize_text_field( $city );
    $city = preg_replace( '/[^a-z0-9-]/', '', strtolower( $city ) );
    return $city;
}

/**
 * Build the embed URL with parameters.
 *
 * @since 1.0.0
 * @param array $atts Widget attributes.
 * @return string The embed URL.
 */
function thirty_year_weather_build_embed_url( $atts ) {
    $city = thirty_year_weather_sanitize_city( $atts['city'] );
    
    if ( empty( $city ) ) {
        $city = 'prague';
    }
    
    $url = THIRTY_YEAR_WEATHER_EMBED_BASE . $city;
    
    $params = array();
    
    // Theme parameter.
    if ( ! empty( $atts['theme'] ) && in_array( $atts['theme'], array( 'dark', 'light' ), true ) ) {
        $params['theme'] = $atts['theme'];
    }
    
    // Layout parameter.
    if ( ! empty( $atts['layout'] ) && in_array( $atts['layout'], array( 'classic', 'visual' ), true ) ) {
        $params['layout'] = $atts['layout'];
    }
    
    // Content sections parameter.
    if ( ! empty( $atts['content'] ) ) {
        $valid_sections = array( 'bestMonths', 'climate', 'temperatures', 'rain', 'humidity', 'tourism' );
        $sections = array_map( 'trim', explode( ',', $atts['content'] ) );
        $sections = array_filter( $sections, function( $s ) use ( $valid_sections ) {
            return in_array( $s, $valid_sections, true );
        });
        if ( ! empty( $sections ) ) {
            $params['content'] = implode( ',', $sections );
        }
    }
    
    if ( ! empty( $params ) ) {
        $url .= '?' . http_build_query( $params );
    }
    
    return esc_url( $url );
}

/**
 * Register the shortcode.
 *
 * Usage: [30yearweather city="prague" theme="dark" layout="classic" width="400" height="450"]
 *
 * @since 1.0.0
 * @param array $atts Shortcode attributes.
 * @return string The widget HTML.
 */
function thirty_year_weather_shortcode( $atts ) {
    $atts = shortcode_atts(
        array(
            'city'    => 'prague',
            'theme'   => 'dark',
            'layout'  => 'classic',
            'content' => 'bestMonths,climate,temperatures',
            'width'   => '400',
            'height'  => '450',
        ),
        $atts,
        '30yearweather'
    );
    
    $embed_url = thirty_year_weather_build_embed_url( $atts );
    
    // Sanitize dimensions.
    $width  = absint( $atts['width'] );
    $height = absint( $atts['height'] );
    
    if ( $width < 200 ) {
        $width = 200;
    }
    if ( $width > 800 ) {
        $width = 800;
    }
    if ( $height < 150 ) {
        $height = 150;
    }
    if ( $height > 800 ) {
        $height = 800;
    }
    
    $border_color = ( 'dark' === $atts['theme'] ) ? '#374151' : '#e5e7eb';
    
    $output = sprintf(
        '<div class="thirty-year-weather-widget" style="max-width: 100%%; overflow: hidden;">
            <iframe
                src="%1$s"
                width="%2$d"
                height="%3$d"
                frameborder="0"
                style="border-radius: 12px; border: 1px solid %4$s; max-width: 100%%;"
                loading="lazy"
                title="%5$s"
            ></iframe>
        </div>',
        esc_url( $embed_url ),
        esc_attr( $width ),
        esc_attr( $height ),
        esc_attr( $border_color ),
        /* translators: %s: city name */
        esc_attr( sprintf( __( 'Weather widget for %s', '30yearweather-widget' ), ucfirst( str_replace( '-', ' ', $atts['city'] ) ) ) )
    );
    
    return $output;
}
add_shortcode( '30yearweather', 'thirty_year_weather_shortcode' );

/**
 * Register the Gutenberg block.
 *
 * @since 1.0.0
 */
function thirty_year_weather_register_block() {
    // Skip if Gutenberg is not available.
    if ( ! function_exists( 'register_block_type' ) ) {
        return;
    }
    
    // Register block script.
    wp_register_script(
        'thirty-year-weather-block-editor',
        THIRTY_YEAR_WEATHER_PLUGIN_URL . 'blocks/weather-widget/index.js',
        array( 'wp-blocks', 'wp-element', 'wp-editor', 'wp-components', 'wp-i18n' ),
        THIRTY_YEAR_WEATHER_VERSION,
        true
    );
    
    // Localize script with cities data.
    wp_localize_script(
        'thirty-year-weather-block-editor',
        'thirtyYearWeatherData',
        array(
            'cities'   => thirty_year_weather_get_cities(),
            'embedBase' => THIRTY_YEAR_WEATHER_EMBED_BASE,
        )
    );
    
    // Register block styles.
    wp_register_style(
        'thirty-year-weather-block-editor',
        THIRTY_YEAR_WEATHER_PLUGIN_URL . 'blocks/weather-widget/editor.css',
        array( 'wp-edit-blocks' ),
        THIRTY_YEAR_WEATHER_VERSION
    );
    
    // Register the block.
    register_block_type(
        'thirty-year-weather/widget',
        array(
            'editor_script'   => 'thirty-year-weather-block-editor',
            'editor_style'    => 'thirty-year-weather-block-editor',
            'render_callback' => 'thirty_year_weather_block_render',
            'attributes'      => array(
                'city'    => array(
                    'type'    => 'string',
                    'default' => 'prague',
                ),
                'theme'   => array(
                    'type'    => 'string',
                    'default' => 'dark',
                ),
                'layout'  => array(
                    'type'    => 'string',
                    'default' => 'classic',
                ),
                'content' => array(
                    'type'    => 'string',
                    'default' => 'bestMonths,climate,temperatures',
                ),
                'width'   => array(
                    'type'    => 'number',
                    'default' => 400,
                ),
                'height'  => array(
                    'type'    => 'number',
                    'default' => 450,
                ),
            ),
        )
    );
}
add_action( 'init', 'thirty_year_weather_register_block' );

/**
 * Render callback for the Gutenberg block.
 *
 * @since 1.0.0
 * @param array $attributes Block attributes.
 * @return string The block HTML.
 */
function thirty_year_weather_block_render( $attributes ) {
    return thirty_year_weather_shortcode( $attributes );
}

/**
 * Add plugin action links.
 *
 * @since 1.0.0
 * @param array $links Existing links.
 * @return array Modified links.
 */
function thirty_year_weather_plugin_action_links( $links ) {
    $settings_link = sprintf(
        '<a href="%s">%s</a>',
        esc_url( 'https://30yearweather.com/widgets' ),
        esc_html__( 'Get More Cities', '30yearweather-widget' )
    );
    array_unshift( $links, $settings_link );
    return $links;
}
add_filter( 'plugin_action_links_' . plugin_basename( __FILE__ ), 'thirty_year_weather_plugin_action_links' );

/**
 * Add a widget to the WordPress dashboard.
 *
 * @since 1.0.0
 */
function thirty_year_weather_add_dashboard_widget() {
    wp_add_dashboard_widget(
        'thirty_year_weather_dashboard',
        __( '30YearWeather Quick Add', '30yearweather-widget' ),
        'thirty_year_weather_dashboard_widget_content'
    );
}
add_action( 'wp_dashboard_setup', 'thirty_year_weather_add_dashboard_widget' );

/**
 * Dashboard widget content.
 *
 * @since 1.0.0
 */
function thirty_year_weather_dashboard_widget_content() {
    ?>
    <p><?php esc_html_e( 'Add weather widgets to your posts using the Gutenberg block or shortcode:', '30yearweather-widget' ); ?></p>
    <code style="display: block; padding: 10px; background: #f0f0f0; margin: 10px 0; border-radius: 4px;">
        [30yearweather city="prague" theme="dark"]
    </code>
    <p>
        <a href="https://30yearweather.com/widgets" target="_blank" rel="noopener noreferrer" class="button button-primary">
            <?php esc_html_e( 'Browse All 470+ Cities', '30yearweather-widget' ); ?>
        </a>
    </p>
    <?php
}