<?php
error_reporting(E_ALL);
ini_set("display_errors", "");
date_default_timezone_set("Asia/Taipei");
$envFile = __DIR__ . '/../.env'; // .env 文件的路径

if (file_exists($envFile)) {
    $lines = file($envFile, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
    if ($lines !== false) {
        foreach ($lines as $line) {
            list($key, $value) = explode('=', $line, 2);
            $key = trim($key);
            $value = trim($value);
            // 设置环境变量
            putenv("$key=$value");
        }
    }
}
class DB
{
    private static $ds = array(
        'default' => array('host' => '127.0.0.1', 'db_name' => 'appwms', 'user' => 'masadaroot', 'pwd' => 'x6h5E5p#u8y')
    );
    public static $instance;
    /**
     * ?
     *
     * @param string $db
     * @return object
     */
    public static function instance($db = 'default')
    {

        $dbh = new PDO("mysql:host=" . self::$ds[$db]['host'] . ";dbname=appwms" . ";charset=utf8", self::$ds[$db]['user'], self::$ds[$db]['pwd']);
        $dbh->setAttribute(PDO::ATTR_CASE, PDO::CASE_LOWER);
        return $dbh;
    }
    /**
     * ?insert 
     *
     * @param [String] $table_name
     * @param [Array] $cols
     * @param [Array] $values
     * @param string $db
     * @return void
     */
    public static function insert_batch($table_name, $cols, $values, $db = 'default')
    {
        $_sql  = 'insert into ' . $table_name . '(' . implode(",", $cols) . ')';
        $_vsql = array();
        foreach ($values as $value) {
            $_vsql[] = 'select ' . implode(",", $value) . 'from dual';
        }
        $_sql .= implode(' Union All ', $_vsql);
        //   self::query($_sql, $db);
        self::instance($db)->exec($_sql);
    }
    /**
     * insert
     *
     * @param [type] $table_name
     * @param [type] $data
     * @param string $db
     * @return void
     */
    public static function insert_table($table_name, $data, $db = 'default')
    {


        // $stmt->debugDumpParams();

        $fields = array_keys($data);

        $meta = self::metadata($table_name, array_keys($data), $db);
        //   var_dump( $meta);  

        foreach ($fields as $f) {

            if ($meta[$f] == 'LONG' || $meta[$f] == 'NEWDECIMAL') {
                $data[$f] =  (int) $data[$f];
            } elseif ($meta[$f] == 'DATETIME' && empty($data[$f])) {
                $data[$f] = 'NULL';
            } else {
                //     var_dump( $data[$f]);
                // if( is_array($data[$f])){ echo "$table_name " ; echo "$f ";};

                $data[$f] = "'" . $data[$f] . "'";
                $data[$f] = $data[$f];
            }
        }

        //foreach ($fields as $f) {

        $_sql = "insert into " . $table_name . "(" . implode(",", array_keys($data)) . ") values (" . implode(",", array_values($data)) . " )";
        //echo $_sql;
        self::instance($db)->exec($_sql);
        //   $stmt->debugDumpParams();


    }
    /**
     * 
     *
     * @param [String] $table_name
     * @param [Array] $data
     * @param [String] $data
     * @param string $db
     * @return void
     */
    public static function update_table($table_name, $data, $where, $db = 'default')
    {
        $fields = array_keys($data);

        $meta = self::metadata($table_name, array_keys($data), $db);
        //   var_dump( $meta);  

        foreach ($fields as $f) {

            if ($meta[$f] == 'LONG') {
                $data[$f] =  (int) $data[$f];
            } else if ($meta[$f] == 'NEWDECIMAL') {
                $data[$f] =  (float) $data[$f];
            } elseif ($meta[$f] == 'DATETIME' && empty($data[$f])) {
                $data[$f] = NULL;
            } else {
                $data[$f] = $data[$f];
                $data[$f] = $data[$f];
            }
        }


        if (empty($where)) {
            return false;
        }
        $sql = "update $table_name  set ";
        $i = 0;
        foreach ($data as $key => $val) {
            $sql .=  $i++ > 0 ? " , $key=:$key  " : " $key=:$key  ";
            $value[$key] = $val;
        }
        // var_dump($value);
        $sql .= " where " . $where;
        $stmt = self::instance($db)->prepare($sql);

        $stmt->execute($value);
        //   $stmt->debugDumpParams();
    }

    /**
     * sql
     *
     * @param [String] $sql
     * @param string $db
     * @return void
     */
    public static function fields($sql, $db = 'default')
    {
        return self::query($sql)->fetch(PDO::FETCH_BOTH);
    }
    /**
     * ?,as_array array?
     *
     * @param [String] $sql
     * @param boolean $as_array 
     * @param string $db
     * @return mixed
     */
    public static function result($sql, $as_array = true, $db = 'default')
    {
        // echo $sql;
        $resource = self::query($sql, $db);

        return $as_array == false ? $resource->fetchAll(PDO::FETCH_OBJ) : $resource->fetchAll(PDO::FETCH_BOTH);
    }
    /**
     *sql?
     *
     * @param [String] $sql
     * @return [int] 
     */
    public static function effect_num($sql, $db = 'default')
    {
        return count(self::query($sql, $db)->fetchAll());
    }
    public static function query($sql, $db = 'default')
    {

        // echo $sql;
        $res = self::instance($db)->prepare($sql);

        if (!$res) {
            //  var_dump($res->errorInfo());
        } else {
            $res->execute();

            return $res;
        }
    }
    public function escape($filed)
    {
    }

    /*
     * 获取列的元数据
     *
     * @param [type] $tablename
     * @return void
     */
    public static function metadata($tablename = null, $col = array(), $db = 'default')
    {
        $column_types = array();

        $stmt  =  self::query("SELECT " . implode(",", array_values($col)) . " FROM " . $tablename . " limit 0,1");
        for ($i = 0; $i < $stmt->columnCount(); $i++) {
            $meta[$i] = $stmt->getColumnMeta($i);

            $column_types[$meta[$i]['name']] =  $meta[$i]['native_type'];
        }

        return $column_types;
    }
}