<?php
class LiveCoinApi
{
    protected $api_url = 'https://api.livecoin.net/';
    protected $api_key = EXCH_LIVECOIN_KEY;

    public $timeout = 10;

    protected function jsonAuth($url, $params=array(), $post=false)
    {
        require_once('/etc/yiimp/keys.php');
        if (!defined('EXCH_LIVECOIN_SECRET')) {
            define('EXCH_LIVECOIN_SECRET', '');
        }
        if (empty(EXCH_LIVECOIN_SECRET)) {
            return false;
        }

        ksort($params);
        $fields = http_build_query($params, '', '&');
        $signature = strtoupper(hash_hmac('sha256', $fields, EXCH_LIVECOIN_SECRET));

        $headers = array(
            "Api-Key: $this->api_key",
            "Sign: $signature"
        );

        if ($post) {
            $ch = curl_init($url);
            curl_setopt($ch, CURLOPT_POST, 'POST');
            curl_setopt($ch, CURLOPT_POSTFIELDS, $fields);
        } else {
            $ch = curl_init($url."?".$fields);
        }
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
        curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; LiveCoin PHP client; '.php_uname('s').'; PHP/'.phpversion().')');
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $this->timeout/2);
        curl_setopt($ch, CURLOPT_TIMEOUT, $this->timeout);

        $response = curl_exec($ch);
        if ($response) {
            $a = json_decode($response);
            $status = curl_getinfo($ch, CURLINFO_HTTP_CODE);
            if (!$a) {
                debuglog("LiveCoin: Auth API failed ($status) ".strip_data($response).' '.curl_error($ch));
            }
        }
        curl_close($ch);

        return isset($a) ? $a : false;
    }

    protected function jsonGet($url, $params=array())
    {

        $fields = http_build_query($params, '', '&');
        $ch = curl_init($url."?".$fields);

        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; LiveCoin PHP client; '.php_uname('s').'; PHP/'.phpversion().')');
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $this->timeout/2);
        curl_setopt($ch, CURLOPT_TIMEOUT, $this->timeout);

        $response = curl_exec($ch);

        if ($response) {
            $a = json_decode($response);
            $status = curl_getinfo($ch, CURLINFO_HTTP_CODE);
            if (!$a) {
                debuglog("LiveCoin: Auth API failed ($status) ".strip_data($response).' '.curl_error($ch));
            }
        }
        curl_close($ch);

        return isset($a) ? $a : false;
    }

    // Public data
    public function getTickerInfo($pair=false)
    {
        $params = array();
        if ($pair) {
            $params['currencyPair'] = $pair;
        }

        return $this->jsonGet($this->api_url.'/exchange/ticker', $params);
    }

    public function getLastTrades($pair, $minorhr='false', $type='flase')
    {
        $params = array('currencyPair' => $pair,
                        'minutesOrHour' => $minorhr,
                        'type' => $type
                       );

        return $this->jsonGet($this->api_url.'/exchange/last_trades', $params);
    }

    public function getOrderBook($pair, $group='false', $depth=10)
    {
        $params = array('currencyPair' => $pair, 'groupByPrice' => $group, 'depth' => $depth);
        return $this->jsonGet($this->api_url.'/exchange/order_book', $params);
    }

    public function getAllOrderBook($group='false', $depth=10)
    {
        $params = array('groupByPrice' => $group, 'depth' => $depth);
        return $this->jsonGet($this->api_url.'/exchange/all/order_book', $params);
    }

    public function getMaxMin($pair=false)
    {
        $params = array();
        if ($pair) {
            $params['currencyPair'] = $pair;
        }

        return $this->jsonGet($this->api_url.'/exchange/maxbid_minask', $params);
    }

    public function getRestrictions()
    {
        return $this->jsonGet($this->api_url.'/exchange/restrictions');
    }

    public function getCoinInfo()
    {
        return $this->jsonGet($this->api_url.'/info/coininfo');
    }


    // Private user data
    public function getTrades($pair=false, $order='true', $limit=100, $offset=0)
    {
        $params = array('orderDesc' => $order,
                        'limit' => $limit,
                        'offset' => $offset
                  );
        if ($pair) {
            $params['currencyPair'] = $pair;
        }

        return $this->jsonAuth($this->api_url.'/exchange/trades', $params);
    }

    public function getClientOrders($pair=false, $open='ALL', $from=false, $to=false, $start=0, $end=2147483646)
    {
        $params = array('open' => $open,
                        'start' => $start,
                        'end' => $end
                  );
        if ($pair) {
            $params['currencyPair'] = $pair;
        }
        if ($from) {
            $params['issuedFrom'] = $from;
        }
        if ($to) {
            $params['issuedTo'] = $to;
        }

        return $this->jsonAuth($this->api_url.'/exchange/client_orders', $params);
    }

    public function getOrder($id)
    {
        $params = array('orderId' => $id);
        return $this->jsonAuth($this->api_url.'/exchange/order', $params);
    }

    public function getBalances($currency=false)
    {
        $params = array();
        if ($currency) {
            $params['currency'] = $currency;
        }
        return $this->jsonAuth($this->api_url.'/payment/balances', $params);
    }

    public function getTransactions($start, $end, $types='BUY,SELL,DEPOSIT,WITHDRAWAL', $limit=100, $offset=0)
    {
        $params = array('start' => $start,
                        'end' => $end,
                        'types' => $types,
                        'limit' => $limit,
                        'offset' => $offset
                  );
        return $this->jsonAuth($this->api_url.'/payment/history/transactions', $params);
    }


    // Orders
    public function buyLimit($pair, $price, $quantity)
    {
        $params = array('currencyPair' => $pair,
                        'price' => $price,
                        'quantity' => $quantity
                  );
        return $this->jsonAuth($this->api_url.'/exchange/buylimit', $params, true);
    }

    public function sellLimit($pair, $price, $quantity)
    {
        $params = array('currencyPair' => $pair,
                        'price' => $price,
                        'quantity' => $quantity
                  );
        return $this->jsonAuth($this->api_url.'/exchange/selllimit', $params, true);
    }

    public function cancelLimitOrder($pair, $id)
    {
        $params = array('currencyPair' => $pair,
                        'orderId' => $id
                  );
        return $this->jsonAuth($this->api_url.'/exchange/cancellimit', $params, true);
    }

    // Deposit and Withdrawal
    public function getDepositAddress($symbol) {
        $params = array('currency' => $symbol);
        return $this->jsonAuth($this->api_url.'/payment/get/address', $params);
    }

    public function withdrawCoin($amnt, $currency, $wallet)
    {
        $params = array('amount' => $amnt,
                        'currency' => $currency,
                        'wallet' => $wallet
                  );
        return $this->jsonAuth($this->api_url.'/payment/out/coin', $params, true);
    }
}