<?php
/**
 * 支付令牌类
 * 
 * 管理客户的支付令牌，用于订阅续费和重复支付
 */

if (!defined('ABSPATH')) {
    exit;
}

/**
 * 支付令牌类
 */
class Yoone_Payment_Token extends Abstract_Yoone_Data {
    
    /**
     * 对象类型
     */
    protected $object_type = 'yoone_payment_token';
    
    /**
     * 数据结构
     */
    protected $data = array(
        'customer_id'    => 0,
        'gateway_id'     => '',
        'token'          => '',
        'token_type'     => 'credit_card',
        'card_type'      => '',
        'last_four'      => '',
        'expiry_month'   => '',
        'expiry_year'    => '',
        'is_default'     => false,
        'expires_at'     => null,
        'created_at'     => null,
        'updated_at'     => null
    );
    
    /**
     * 构造函数
     */
    public function __construct($id = 0) {
        parent::__construct($id);
    }
    
    /*
    |--------------------------------------------------------------------------
    | Getters
    |--------------------------------------------------------------------------
    */
    
    /**
     * 获取客户ID
     */
    public function get_customer_id($context = 'view') {
        return $this->get_prop('customer_id', $context);
    }
    
    /**
     * 获取网关ID
     */
    public function get_gateway_id($context = 'view') {
        return $this->get_prop('gateway_id', $context);
    }
    
    /**
     * 获取令牌
     */
    public function get_token($context = 'view') {
        return $this->get_prop('token', $context);
    }
    
    /**
     * 获取令牌类型
     */
    public function get_token_type($context = 'view') {
        return $this->get_prop('token_type', $context);
    }
    
    /**
     * 获取卡片类型
     */
    public function get_card_type($context = 'view') {
        return $this->get_prop('card_type', $context);
    }
    
    /**
     * 获取卡片后四位
     */
    public function get_last_four($context = 'view') {
        return $this->get_prop('last_four', $context);
    }
    
    /**
     * 获取过期月份
     */
    public function get_expiry_month($context = 'view') {
        return $this->get_prop('expiry_month', $context);
    }
    
    /**
     * 获取过期年份
     */
    public function get_expiry_year($context = 'view') {
        return $this->get_prop('expiry_year', $context);
    }
    
    /**
     * 是否为默认令牌
     */
    public function is_default($context = 'view') {
        return $this->get_prop('is_default', $context);
    }
    
    /**
     * 获取过期时间
     */
    public function get_expires_at($context = 'view') {
        return $this->get_prop('expires_at', $context);
    }
    
    /**
     * 获取创建时间
     */
    public function get_created_at($context = 'view') {
        return $this->get_prop('created_at', $context);
    }
    
    /**
     * 获取更新时间
     */
    public function get_updated_at($context = 'view') {
        return $this->get_prop('updated_at', $context);
    }
    
    /*
    |--------------------------------------------------------------------------
    | Setters
    |--------------------------------------------------------------------------
    */
    
    /**
     * 设置客户ID
     */
    public function set_customer_id($customer_id) {
        $this->set_prop('customer_id', absint($customer_id));
    }
    
    /**
     * 设置网关ID
     */
    public function set_gateway_id($gateway_id) {
        $this->set_prop('gateway_id', sanitize_text_field($gateway_id));
    }
    
    /**
     * 设置令牌
     */
    public function set_token($token) {
        $this->set_prop('token', sanitize_text_field($token));
    }
    
    /**
     * 设置令牌类型
     */
    public function set_token_type($type) {
        $valid_types = array('credit_card', 'debit_card', 'bank_account');
        if (in_array($type, $valid_types)) {
            $this->set_prop('token_type', $type);
        }
    }
    
    /**
     * 设置卡片类型
     */
    public function set_card_type($type) {
        $this->set_prop('card_type', sanitize_text_field($type));
    }
    
    /**
     * 设置卡片后四位
     */
    public function set_last_four($last_four) {
        $this->set_prop('last_four', sanitize_text_field($last_four));
    }
    
    /**
     * 设置过期月份
     */
    public function set_expiry_month($month) {
        $this->set_prop('expiry_month', str_pad(absint($month), 2, '0', STR_PAD_LEFT));
    }
    
    /**
     * 设置过期年份
     */
    public function set_expiry_year($year) {
        $this->set_prop('expiry_year', absint($year));
    }
    
    /**
     * 设置为默认令牌
     */
    public function set_default($is_default) {
        $this->set_prop('is_default', (bool) $is_default);
        
        // 如果设置为默认，需要取消其他令牌的默认状态
        if ($is_default && $this->get_customer_id()) {
            $this->unset_other_defaults();
        }
    }
    
    /**
     * 设置过期时间
     */
    public function set_expires_at($expires_at) {
        $this->set_prop('expires_at', $this->format_date($expires_at));
    }
    
    /*
    |--------------------------------------------------------------------------
    | 验证方法
    |--------------------------------------------------------------------------
    */
    
    /**
     * 检查令牌是否有效
     */
    public function is_valid() {
        // 检查基本信息
        if (empty($this->get_token()) || empty($this->get_gateway_id()) || !$this->get_customer_id()) {
            return false;
        }
        
        // 检查是否过期
        if ($this->is_expired()) {
            return false;
        }
        
        return true;
    }
    
    /**
     * 检查令牌是否过期
     */
    public function is_expired() {
        $expires_at = $this->get_expires_at();
        
        if (!$expires_at) {
            return false;
        }
        
        return strtotime($expires_at) < time();
    }
    
    /**
     * 检查卡片是否过期
     */
    public function is_card_expired() {
        $month = $this->get_expiry_month();
        $year = $this->get_expiry_year();
        
        if (!$month || !$year) {
            return false;
        }
        
        $expiry_date = mktime(23, 59, 59, $month, date('t', mktime(0, 0, 0, $month, 1, $year)), $year);
        
        return $expiry_date < time();
    }
    
    /*
    |--------------------------------------------------------------------------
    | 辅助方法
    |--------------------------------------------------------------------------
    */
    
    /**
     * 获取显示名称
     */
    public function get_display_name() {
        $card_type = $this->get_card_type();
        $last_four = $this->get_last_four();
        
        if ($card_type && $last_four) {
            return sprintf('%s ending in %s', ucfirst($card_type), $last_four);
        }
        
        return __('支付方式', 'yoone-subscriptions');
    }
    
    /**
     * 取消其他令牌的默认状态
     */
    protected function unset_other_defaults() {
        global $wpdb;
        
        $wpdb->update(
            $wpdb->prefix . 'yoone_payment_tokens',
            array('is_default' => 0),
            array(
                'customer_id' => $this->get_customer_id(),
                'gateway_id'  => $this->get_gateway_id()
            ),
            array('%d'),
            array('%d', '%s')
        );
    }
    
    /**
     * 格式化日期
     */
    protected function format_date($date) {
        if (empty($date)) {
            return null;
        }
        
        if (is_numeric($date)) {
            return date('Y-m-d H:i:s', $date);
        }
        
        return date('Y-m-d H:i:s', strtotime($date));
    }
    
    /*
    |--------------------------------------------------------------------------
    | 数据库操作
    |--------------------------------------------------------------------------
    */
    
    /**
     * 从数据库读取
     */
    protected function read() {
        global $wpdb;
        
        $data = $wpdb->get_row($wpdb->prepare("
            SELECT * FROM {$wpdb->prefix}yoone_payment_tokens WHERE id = %d
        ", $this->get_id()));
        
        if ($data) {
            $this->set_props(array(
                'customer_id'  => $data->customer_id,
                'gateway_id'   => $data->gateway_id,
                'token'        => $data->token,
                'token_type'   => $data->token_type,
                'card_type'    => $data->card_type,
                'last_four'    => $data->last_four,
                'expiry_month' => $data->expiry_month,
                'expiry_year'  => $data->expiry_year,
                'is_default'   => (bool) $data->is_default,
                'expires_at'   => $data->expires_at,
                'created_at'   => $data->created_at,
                'updated_at'   => $data->updated_at
            ));
        }
    }
    
    /**
     * 创建记录
     */
    protected function create() {
        global $wpdb;
        
        $data = array(
            'customer_id'  => $this->get_customer_id('edit'),
            'gateway_id'   => $this->get_gateway_id('edit'),
            'token'        => $this->get_token('edit'),
            'token_type'   => $this->get_token_type('edit'),
            'card_type'    => $this->get_card_type('edit'),
            'last_four'    => $this->get_last_four('edit'),
            'expiry_month' => $this->get_expiry_month('edit'),
            'expiry_year'  => $this->get_expiry_year('edit'),
            'is_default'   => $this->is_default('edit') ? 1 : 0,
            'expires_at'   => $this->get_expires_at('edit'),
            'created_at'   => current_time('mysql'),
            'updated_at'   => current_time('mysql')
        );
        
        $result = $wpdb->insert(
            $wpdb->prefix . 'yoone_payment_tokens',
            $data,
            array('%d', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%d', '%s', '%s', '%s')
        );
        
        if ($result) {
            $this->set_id($wpdb->insert_id);
            do_action('yoone_payment_token_created', $this->get_id(), $this);
        }
        
        return $result;
    }
    
    /**
     * 更新记录
     */
    protected function update() {
        global $wpdb;
        
        $changes = $this->get_changes();
        
        if (empty($changes)) {
            return true;
        }
        
        $changes['updated_at'] = current_time('mysql');
        
        $result = $wpdb->update(
            $wpdb->prefix . 'yoone_payment_tokens',
            $changes,
            array('id' => $this->get_id()),
            null,
            array('%d')
        );
        
        if ($result !== false) {
            do_action('yoone_payment_token_updated', $this->get_id(), $this);
        }
        
        return $result !== false;
    }
    
    /**
     * 从数据库删除
     */
    protected function delete_from_database($force_delete = false) {
        global $wpdb;
        
        $result = $wpdb->delete(
            $wpdb->prefix . 'yoone_payment_tokens',
            array('id' => $this->get_id()),
            array('%d')
        );
        
        if ($result) {
            do_action('yoone_payment_token_deleted', $this->get_id());
        }
        
        return $result !== false;
    }
    
    /**
     * 设置多个属性
     */
    protected function set_props($props) {
        foreach ($props as $prop => $value) {
            if (array_key_exists($prop, $this->data)) {
                $this->data[$prop] = $value;
            }
        }
    }
    
    /*
    |--------------------------------------------------------------------------
    | 静态方法
    |--------------------------------------------------------------------------
    */
    
    /**
     * 根据客户ID获取令牌
     */
    public static function get_customer_tokens($customer_id, $gateway_id = '') {
        global $wpdb;
        
        $where = $wpdb->prepare("customer_id = %d", $customer_id);
        
        if ($gateway_id) {
            $where .= $wpdb->prepare(" AND gateway_id = %s", $gateway_id);
        }
        
        $where .= " AND (expires_at IS NULL OR expires_at > NOW())";
        
        $results = $wpdb->get_results("
            SELECT id FROM {$wpdb->prefix}yoone_payment_tokens
            WHERE {$where}
            ORDER BY is_default DESC, created_at DESC
        ");
        
        $tokens = array();
        foreach ($results as $result) {
            $tokens[] = new self($result->id);
        }
        
        return $tokens;
    }
    
    /**
     * 根据令牌字符串获取令牌对象
     */
    public static function get_by_token($token, $gateway_id) {
        global $wpdb;
        
        $id = $wpdb->get_var($wpdb->prepare("
            SELECT id FROM {$wpdb->prefix}yoone_payment_tokens
            WHERE token = %s AND gateway_id = %s
        ", $token, $gateway_id));
        
        return $id ? new self($id) : null;
    }
    
    /**
     * 获取客户的默认令牌
     */
    public static function get_default_token($customer_id, $gateway_id) {
        global $wpdb;
        
        $id = $wpdb->get_var($wpdb->prepare("
            SELECT id FROM {$wpdb->prefix}yoone_payment_tokens
            WHERE customer_id = %d AND gateway_id = %s AND is_default = 1
            AND (expires_at IS NULL OR expires_at > NOW())
        ", $customer_id, $gateway_id));
        
        return $id ? new self($id) : null;
    }
    
    /**
     * 清理过期令牌
     */
    public static function cleanup_expired_tokens() {
        global $wpdb;
        
        $count = $wpdb->query("
            DELETE FROM {$wpdb->prefix}yoone_payment_tokens
            WHERE expires_at IS NOT NULL AND expires_at < NOW()
        ");
        
        if ($count > 0) {
            Yoone_Logger::info("清理了 {$count} 个过期的支付令牌");
        }
        
        return $count;
    }
}