<?php
	set_time_limit(0);
	//安全检查：只接受来自westdc.westgis.ac.cn的访问
	if(@$_SERVER['HTTP_CLIENT_IP']){  
		$onlineip=$_SERVER['HTTP_CLIENT_IP'];  
	}elseif(@$_SERVER['HTTP_X_FORWARDED_FOR']){  
		$onlineip=$_SERVER['HTTP_X_FORWARDED_FOR'];  
	}else{  
		$onlineip=@$_SERVER['REMOTE_ADDR'];  
	}
	if ($argc!=2 && $onlineip!='210.77.68.241' && $onlineip!='210.77.68.215' && $onlineip!='2001:cc0:f006::9')
		die("error! You are not permitted to visit this page.".$onlineip);  

	$db = new PDO('pgsql:host=210.77.68.40;dbname=observation', "gis", "gispassword");
	$station = 0;
	$site = 0;
	$logger = 0;
	$variable = 0;
	$start;
	$end;
	$uid=0;
	$sitename="";
	$mailname = "";
	$createtime = date("Ymd",time());
	$endtime="";
	$html="";
	$time="";
	$value="";
	$var="";
	$file=array();
	$basepath='/disk1/WestDC/wsndata/';
	//接收用户uid，只生成这个用户的数据
	if($argc==2)
	{
		$uid = (int)$argv[1];
	}else{
		$uid = (int)@$_GET['uid'];
	}
	if (!($uid>0))
	{
		die("Error in parameter.");
	}
	$action=@$_GET['action'];
			
	if(!empty($action) && $action=='prepare')
	{
		$content="php -f /var/www/ftp2.westgis.ac.cn/wsndata.php $uid";
   	$filename='wsndata.sh';
   	if (!file_put_contents($filename, $content, LOCK_EX))
   	{
   		sleep(1);
   		if (!file_put_contents($filename, $content, LOCK_EX))
   		{
   			sleep(1);
   			if (!file_put_contents($filename, $content, LOCK_EX))
   				die("error in write wsndatar.sh");
   		}
   	}		
	}	else	{			   
		$sql_user = "SELECT * from users_pm_down where starttime is not null and result=-1 and type='down' and uid=$uid";
		$sth_user = $db->query($sql_user);
		$rows_user = $sth_user->fetchAll();

		//有需要生成的数据
		if(!empty($rows_user))
		{
			foreach($rows_user as $k=>$v )
			{
				//逐个生成
				$site = $v['site'];
				$variable =  $v['variable'];
				$start =  $v['starttime'];
				$end =  $v['endtime'];
				$uid =  $v['uid']; 
				//计算有多少天
				$days=round((strtotime($end)-strtotime($start))/3600/24)+1;
				//获取观测点的名称
				$sql_site= "SELECT fld_name from tbl_site_info where fld_site_id=$site";		
				$sth_site = $db->query($sql_site);
				$rows_site = $sth_site->fetch();
				$sitename= $rows_site['fld_name'];
				//获取用户的邮箱
				$sql_mail= "SELECT email from users where id=$uid";		
				$sth_mail = $db->query($sql_mail);
				$rows_mail = $sth_mail->fetch();
				if(empty($rows_mail))
					{$rows_mail['email']=="wuadan@lzb.ac.cn";}
				//先为该用户创建一个文件夹
				$aimDir_user=$basepath.'wsn_'.$uid;
				if (!file_exists($aimDir_user)) 
				{
					$result = mkdir($aimDir_user);
				}
				//在该用户文件夹下面再建立一个观测点文件夹
				$aimDir_site=$aimDir_user.DIRECTORY_SEPARATOR.$site;
				if (!file_exists($aimDir_site)) 
				{
					$result = mkdir($aimDir_site);
				}
				
				//选择全部变量
				if($variable==-1)
				{
					//获取数据
					for ($i = 1; $i <= $days; $i++)
					{
						$endtime=date("Y-m-d 00:00:00",strtotime($start)+24*3600);
						$sql2= "SELECT v.fld_time as time,v.fld_value as value,va.fld_name as variablename FROM tbl_value v left join tbl_variable_info va on v.fld_variable_id=va.fld_variable_id WHERE v.fld_site_id=$site AND v.fld_time>='$start' AND v.fld_time<'$endtime' ORDER BY time ";		
									
						$sth2 = $db->query($sql2);
						$rows2 = $sth2->fetchAll();
						$datamount=count( $rows2);
						//组装数据
						$html="";
						foreach($rows2 as $k=>$v)
						{
							$time[$k] = $v['time'];
							$value[$k] = $v['value'];
							$var[$k] = $v['variablename'];
							$html .=$time[$k].",".$var[$k].",".$value[$k]."\n";
						}
									
						$head = "Time,Variable,Value, \n";
									
						//将数据写入文件
						$resulttime=date("Ymd",strtotime($start));
					
						$fp = fopen($aimDir_site.DIRECTORY_SEPARATOR.$sitename."_all_".$resulttime.".CSV","a");  //打开csv文件，如果不存在则创建
						fwrite($fp,$head.$html); //写入数据
						fclose($fp); //关闭文件句柄
									  
						$start = $endtime;
					}
					$sql_up= "update users_pm_down set result=0 WHERE site=$site and variable=-1 and uid=$uid  and result=-1 and type='down'";
					$sth_up = $db->query($sql_up);
				} else {
					//获取观测变量的名称
					$sql3= "SELECT fld_name from tbl_variable_info where fld_variable_id=$variable";		
					$sth3 = $db->query($sql3);
					$rows3 = $sth3->fetch();
					$varname=$rows3['fld_name'];
					//获取数据
					$endtime="";
					for ($i = 1; $i <= $days; $i++)
					{
						$endtime=date("Y-m-d H:m:s",strtotime($start)+24*3600);
						$sql2= "SELECT v.fld_time as time,v.fld_value as value,va.fld_name as variablename FROM tbl_value v left join tbl_variable_info va on v.fld_variable_id=va.fld_variable_id WHERE v.fld_variable_id =$variable and v.fld_site_id=$site AND v.fld_time>='$start' AND v.fld_time<='$endtime' ORDER BY time  ";		
									
						$sth2 = $db->query($sql2);
						$rows2 = $sth2->fetchAll();
						$datamount=count( $rows2);
						//组装数据
						$html="";
						foreach($rows2 as $k=>$v)
						{
							$time[$k] = $v['time'];
							$value[$k] = $v['value'];
							$var[$k] = $v['variablename'];
							$html .=$time[$k].",".$var[$k].",".$value[$k]."\n";
						}
									
						$head = "Time,Variable,Value, \n";
						//写入文件
						$resulttime=date("Ymd",strtotime($start));
						$fp = fopen($aimDir_site.DIRECTORY_SEPARATOR.$sitename."_".$varname."_".$resulttime.".CSV","a+"); 
						fwrite($fp,$head.$html); //写入数据
						fclose($fp); //关闭文件句柄
						$start = $endtime;
					}
					//给处理的数据做个标记result=0
					$sql_up= "update users_pm_down set result=0 WHERE site=$site and variable=$variable and uid=$uid  and result=-1 and type='down'";		
					$sth_up = $db->query($sql_up);
				}
			}
		}
	}