<?php
/**
 * IdentifyUtils.php UTF-8
 *
 *
 * @date    : 2018/4/27 17:59
 *
 * @license 这不是一个自由软件，未经授权不许任何使用和传播。
 * @author  : wuyonghong <wyh@huosdk.com>
 * @version : HUOSDK 8.0
 */

namespace huolib\utils;

use huolib\constant\IdentifyConst;
use huolib\status\IdentifyStatus;

class IdentifyUtils {
    CONST ID_CARD_MIN_LEN   = 4;
    CONST ID_CARD_MAX_LEN   = 32;
    CONST REAL_NAME_MIN_LEN = 1;
    CONST REAL_NAME_MAX_LEN = 32;

    /**
     * 校验认证
     *
     * @param string $type
     * @param string $real_name
     * @param string $id_card
     *
     * @return int
     */
    public static function checkIdentify($type = '', $real_name = '', $id_card = '') {
        if (empty($type)) {
            return IdentifyStatus::TYPE_EMPTY;
        }
        if (empty($real_name)) {
            return IdentifyStatus::REALNAME_EMPTY;
        }
        if (empty($id_card)) {
            return IdentifyStatus::IDCARD_EMPTY;
        }
        if (false == IdentifyConst::getMsg($type)) {
            return IdentifyStatus::TYPE_ERROR;
        }
        if (strlen($real_name) > self::REAL_NAME_MAX_LEN) {
            return IdentifyStatus::REALNAME_TOO_LONG;
        }
        if (strlen($real_name) < self::REAL_NAME_MIN_LEN) {
            return IdentifyStatus::REALNAME_TOO_SHORT;
        }
        if (strlen($id_card) > self::ID_CARD_MAX_LEN) {
            return IdentifyStatus::IDCARD_TOO_LONG;
        }
        if (strlen($id_card) < self::ID_CARD_MIN_LEN) {
            return IdentifyStatus::IDCARD_TOO_SHORT;
        }
        if (IdentifyConst::ITYPE_MAINLAND == $type && false == self::validateIDCard($id_card)) {
            return IdentifyStatus::IDCARD_ERROR;
        }

        return IdentifyStatus::NO_ERROR;
    }

    /**
     * 验证身份证是否有效
     *
     * @param $id_card
     *
     * @return bool
     */
    public static function validateIDCard($id_card) {
        $_id_card = $id_card;
        if (strlen($_id_card) == 18) {
            return self::check18IDCard($_id_card);
        } elseif ((strlen($_id_card) == 15)) {
            $_id_card = self::convertIDCard15to18($_id_card);

            return self::check18IDCard($_id_card);
        } else {
            return false;
        }
    }

    /**
     * 计算身份证的最后一位验证码,根据国家标准GB 11643-1999
     *
     * @param $id_card_body
     *
     * @return bool|mixed
     */
    public static function calcIDCardCode($id_card_body) {
        if (!is_numeric($id_card_body)) {
            /* 必须为数字 */
            return -1;
        }
        $_id_card_body = $id_card_body;
        if (strlen($_id_card_body) != 17) {
            return false;
        }
        //加权因子
        $_factor = array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);
        //校验码对应值
        $_code = array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2');
        $_check_sum = 0;
        for ($_i = 0; $_i < strlen($_id_card_body); $_i++) {
            $_check_sum += substr($_id_card_body, $_i, 1) * $_factor[$_i];
        }

        return $_code[$_check_sum % 11];
    }

    /**
     * 将15位身份证升级到18位
     *
     * @param $id_card
     *
     * @return bool|string
     */
    public static function convertIDCard15to18($id_card) {
        $_id_card = $id_card;
        if (15 != strlen($_id_card)) {
            return false;
        } else {
            // 如果身份证顺序码是996 997 998 999，这些是为百岁以上老人的特殊编码
            if (array_search(substr($_id_card, 12, 3), array('996', '997', '998', '999')) !== false) {
                $_id_card = substr($_id_card, 0, 6).'18'.substr($_id_card, 6, 9);
            } else {
                $_id_card = substr($_id_card, 0, 6).'19'.substr($_id_card, 6, 9);
            }
        }
        $_id_card = $_id_card.self::calcIDCardCode($_id_card);

        return $_id_card;
    }

    /**
     * 18位身份证校验码有效性检查
     *
     * @param $id_card
     *
     * @return bool
     */
    public static function check18IDCard($id_card) {
        $_id_card = $id_card;
        if (18 != strlen($_id_card)) {
            return false;
        }
        $_id_card_body = substr($_id_card, 0, 17); //身份证主体
        $_id_card_code = strtoupper(substr($_id_card, 17, 1)); //身份证最后一位的验证码
        if (self::calcIDCardCode($_id_card_body) != $_id_card_code) {
            return false;
        } else {
            return true;
        }
    }

    /**
     * 从身份证号码获取生日
     *
     * @param string $id_card 身份证号码
     * @param string $glue    连接符
     *
     * @return string : string
     */
    public static function getBirthday($id_card, $glue = '') {
        if (empty($id_card)) {
            return '';
        }
        $_date = strlen($id_card) == 15 ? ('19'.substr($id_card, 6, 6)) : substr($id_card, 6, 8);
        $_year = substr($_date, 0, 4);
        $_moth = substr($_date, 4, 2);
        $_day = substr($_date, 6, 2);
        $_birthday = implode($glue, [$_year, $_moth, $_day]);

        return $_birthday;
    }

    /**
     * 根据身份证号获取年龄(周岁)
     *
     * @param string $id_card 身份证号
     *
     * @return int
     */
    public static function getAgeById($id_card) {
        $_birthday = self::getBirthday($id_card, '-');
        $_age = self::getAge($_birthday);

        return $_age;
    }

    /**
     *  根据身份证号码计算年龄
     *
     * @param string $birthday 出生年月日
     *
     * @return int $age
     */
    public static function getAge($birthday) {
        if (empty($birthday)) {
            return 0;
        }
        $_birthday = date('Y-m-d', strtotime($birthday));
        list($_birth_year, $_birth_month, $_birth_day) = explode('-', $_birthday);
        list($_current_year, $_current_month, $_current_day) = explode('-', date('Y-m-d'));
        $_age = $_current_year - $_birth_year - 1;
        if ($_current_month > $_birth_month
            || ($_current_month == $_birth_month && $_current_day >= $_birth_day)) {
            $_age++;
        }

        return $_age;
    }
}