<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class AdifHelper {

	public function getAdifLine($qso) {
		$normalFields = array(
			'ADDRESS',
			'AGE',
			'A_INDEX',
			'ANT_AZ',
			'ANT_EL',
			'ANT_PATH',
			'ARRL_SECT',
			'AWARD_GRANTED',
			'AWARD_SUBMITTED',
			'BAND',
			'BAND_RX',
			'BIOGRAPHY',
			'CALL',
			'CHECK',
			'CLASS',
			'CLUBLOG_QSO_UPLOAD_STATUS',
			'CNTY',
			'COMMENT',
			'CONT',
			'CONTACTED_OP',
			'CONTEST_ID',
			'CQZ',
			'CREDIT_GRANTED',
			'CREDIT_SUBMITTED',
			'DARC_DOK',
			'DISTANCE',
			'DXCC',
			'EMAIL',
			'EQ_CALL',
			'EQSL_QSL_RCVD',
			'EQSL_QSL_SENT',
			'EQSL_STATUS',
			'EQSL_AG',
			'FISTS',
			'FISTS_CC',
			'FORCE_INIT',
			'GRIDSQUARE',
			'HEADING',
			'IOTA',
			'ITUZ',
			'K_INDEX',
			'LAT',
			'LON',
			'LOTW_QSL_RCVD',
			'LOTW_QSL_SENT',
			'LOTW_STATUS',
			'MAX_BURSTS',
			'MODE',
			'MS_SHOWER',
			'NAME',
			'NOTES',
			'NR_BURSTS',
			'NR_PINGS',
			'OPERATOR',
			'OWNER_CALLSIGN',
			'PFX',
			'PRECEDENCE',
			'PROP_MODE',
			'PUBLIC_KEY',
			'HRDLOG_QSO_UPLOAD_STATUS',
			'QRZCOM_QSO_UPLOAD_STATUS',
			'QRZCOM_QSO_DOWNLOAD_STATUS',
			'QSLMSG',
			'QSL_RCVD',
			'QSL_RCVD_VIA',
			'QSL_SENT',
			'QSL_SENT_VIA',
			'QSL_VIA',
			'QSO_COMPLETE',
			'QSO_RANDOM',
			'QTH',
			'REGION',
			'RIG',
			'RST_RCVD',
			'RST_SENT',
			'RX_PWR',
			'SAT_MODE',
			'SAT_NAME',
			'SFI',
			'SILENT_KEY',
			'SKCC',
			'SOTA_REF',
			'WWFF_REF',
			'POTA_REF',
			'SRX',
			'SRX_STRING',
			'STATE',
			'STX',
			'STX_STRING',
			'SUBMODE',
			'SWL',
			'TEN_TEN',
			'TX_PWR',
			'UKSMG',
			'USACA_COUNTIES',
			'VUCC_GRIDS',
			'WEB',
			'CNTY_ALT',
			'MY_CNTY_ALT',
			'MY_DARC_DOK',
			'MY_ANTENNA',
			'MY_ANTENNA_INTL',
			'MORSE_KEY_INFO',
			'MORSE_KEY_TYPE',
			'QSLMSG_RCVD',
			'DCL_QSL_RCVD',
			'DCL_QSL_SENT'
		);

		$dateFields = array(
			'EQSL_QSLRDATE',
			'EQSL_QSLSDATE',
			'LOTW_QSLRDATE',
			'LOTW_QSLSDATE',
			'QSLRDATE',
			'QSLSDATE',
			'CLUBLOG_QSO_UPLOAD_DATE',
			'HRDLOG_QSO_UPLOAD_DATE',
			'QRZCOM_QSO_UPLOAD_DATE',
			'QRZCOM_QSO_DOWNLOAD_DATE',
			'DCL_QSLRDATE',
			'DCL_QSLSDATE'
		);

	/**
	    Missing:
	    USER_DEFINED_0
	    USER_DEFINED_1
	    USER_DEFINED_2
	    USER_DEFINED_3
	    USER_DEFINED_4
	    USER_DEFINED_5
	    USER_DEFINED_6
	    USER_DEFINED_7
	    USER_DEFINED_8
	    USER_DEFINED_9
	 */

		// Build ADIF fields

		$line = "";
		foreach ($normalFields as $field) {
			$line .= $this->getAdifFieldLine($field, $qso->{'COL_' . $field});
		}

		foreach ($dateFields as $field) {
			if ($qso->{'COL_' . $field}) {
				$date = strtotime($qso->{'COL_' . $field});
				$date = date('Ymd', $date);
				$line .= $this->getAdifFieldLine($field, $date);
			}
		}

		if ($qso->COL_DXCC != 0) {
			$line .= $this->getAdifFieldLine("COUNTRY", $qso->COL_COUNTRY);
		}

		if ($qso->COL_FREQ != 0) {
			$freq_in_mhz = $qso->COL_FREQ / 1000000;
			$line .= $this->getAdifFieldLine("FREQ", $freq_in_mhz);
		}

		if ($qso->COL_FREQ_RX != 0) {
			$freq_rx_in_mhz = $qso->COL_FREQ_RX / 1000000;
			$line .= $this->getAdifFieldLine("FREQ_RX", $freq_rx_in_mhz);
		}

		if (isset($qso->COL_TIME_ON) && (date('YmdHis',strtotime($qso->COL_TIME_ON)) != '-00011130000000')) {
			$date_on = strtotime($qso->COL_TIME_ON);
			$date_on = date('Ymd', $date_on);
			$line .= $this->getAdifFieldLine("QSO_DATE", $date_on);

			$time_on = strtotime($qso->COL_TIME_ON);
			$time_on = date('His', $time_on);
			$line .= $this->getAdifFieldLine("TIME_ON", $time_on);
		} else {
			$line .= $this->getAdifFieldLine("QSO_DATE", '19700101');
			$line .= $this->getAdifFieldLine("TIME_ON", '000000');
		}

		if (isset($qso->COL_TIME_OFF) && (date('YmdHis',strtotime($qso->COL_TIME_OFF)) != '-00011130000000')) {
			$date_off = strtotime($qso->COL_TIME_OFF);
			$date_off = date('Ymd', $date_off);
			$line .= $this->getAdifFieldLine("QSO_DATE_OFF", $date_off);

			$time_off = strtotime($qso->COL_TIME_OFF);
			$time_off = date('His', $time_off);
			$line .= $this->getAdifFieldLine("TIME_OFF", $time_off);
		} else {
			$line .= $this->getAdifFieldLine("QSO_DATE_OFF", '19700101');
			$line .= $this->getAdifFieldLine("TIME_OFF", '000000');
		}

		// "MY" information
		$line .= $this->getAdifFieldLine("STATION_CALLSIGN", $qso->station_callsign);

		$line .= $this->getAdifFieldLine("MY_CITY", $qso->station_city);

		$line .= $this->getAdifFieldLine("MY_COUNTRY", $qso->station_country);

		$line .= $this->getAdifFieldLine("MY_DXCC", $qso->station_dxcc);

		if (strpos($qso->station_gridsquare, ',') !== false ) {
			$line .= $this->getAdifFieldLine("MY_VUCC_GRIDS", $qso->station_gridsquare);
		} else {
			$line .= $this->getAdifFieldLine("MY_GRIDSQUARE", $qso->station_gridsquare);
		}

		$line .= $this->getAdifFieldLine("MY_IOTA", $qso->station_iota);

		$line .= $this->getAdifFieldLine("MY_SOTA_REF", $qso->station_sota);

		$line .= $this->getAdifFieldLine("MY_WWFF_REF", $qso->station_wwff);

		$line .= $this->getAdifFieldLine("MY_POTA_REF", $qso->station_pota);

		$line .= $this->getAdifFieldLine("MY_CQ_ZONE", $qso->station_cq);

		$line .= $this->getAdifFieldLine("MY_ITU_ZONE", $qso->station_itu);

		$line .= $this->getAdifFieldLine("MY_STATE", $qso->state);

		// See: https://adif.org/314/ADIF_314.htm#Sponsor_Defined_Code_Format
		if ($qso->station_cnty) {
			switch ($qso->station_dxcc) {
			case '6':
			case '110':
			case '291':
				$county = trim($qso->state) . "," . trim($qso->station_cnty);
				break;
			default:
				$county = trim($qso->station_cnty);
				break;
			}
		} else {
			$county = '';
		}

		$line .= $this->getAdifFieldLine("MY_CNTY", $county);

		$line .= $this->getAdifFieldLine("MY_SIG", $qso->station_sig);
		$line .= $this->getAdifFieldLine("MY_SIG_INFO", $qso->station_sig_info);
		$line .= $this->getAdifFieldLine("MY_RIG", $qso->{'COL_MY_RIG'} ?? '');
		$line .= $this->getAdifFieldLine("MY_RIG_INTL", $qso->{'COL_MY_RIG_INTL'} ?? '');

		$line .= $this->getAdifFieldLine("SIG", $qso->{'COL_SIG'});
		$line .= $this->getAdifFieldLine("SIG_INFO", $qso->{'COL_SIG_INFO'});

	/*
	    Missing:
	    MY_FISTS
	    MY_IOTA_ISLAND_ID
	    MY_LAT
	    MY_LON
	    MY_NAME
	    MY_POSTAL_CODE
	    MY_STREET
	    MY_USACA_COUNTIES
	 */

		$line .= "<EOR>\r\n\r\n";

		return $line;
	}

	function getAdifHeader($app_name,$version, $adif_version) {
		$adif_header = "Wavelog ADIF export\n";
		$adif_header .= "<ADIF_VER:".strlen($adif_version).">".$adif_version."\n";
		$adif_header .= "<PROGRAMID:".strlen($app_name).">".$app_name."\r\n";
		$adif_header .= "<PROGRAMVERSION:".strlen($version).">".$version."\r\n";
		$adif_header .= "<EOH>\n\n";
		return $adif_header;
	}

    function getAdifFieldLine($adifcolumn, $dbvalue) {
        if ($dbvalue !== "" && $dbvalue !== null && $dbvalue !== 0) {
            return "<" . $adifcolumn . ":" . mb_strlen($dbvalue, "UTF-8") . ">" . $dbvalue . "\r\n";
        } else {
            return "";
        }
    }
}
