<?php

Lib::loadClass('Api_WfsGeomTypeConverter');
Lib::loadClass('Core_AclHelper');

class Api_Wfs_GetFeature {

	public static function convertOgcPropertyListToFeatureQueryCols(&$schemaCache, $ogcPropertyList, $acl) {
		return self::convertOgcPropsRecurse($schemaCache, $ogcPropertyList, $acl);
	}
	public static function convertOgcPropsRecurse(&$schemaCache, $ogcPropertyList, $aclOrSchema, $dbgLoopNr = 0) {
		if ($dbgLoopNr > 10) {
			DBG::log($ogcPropertyList, 'array', 'convertOgcPropsRecurse: LOOP LIMIT 10! - return []');
			return [];
		}
		$acl = null;
		if (is_array($aclOrSchema) && !empty($aclOrSchema['namespace'])) {
			$acl = Core_AclHelper::getAclByNamespace($aclOrSchema['namespace'], false, $aclOrSchema);
		} else if ($aclOrSchema instanceof Core_AclBase) {
			$acl = $aclOrSchema;
		} else throw new Exception("Missing acl");

		if (empty($ogcPropertyList)) {
			$ogcPropertyList = array_values($acl->getFieldListByIdZasob());
			$ogcPropertyList = array_filter($ogcPropertyList, function ($fieldName) use ($acl) {
				return $acl->canReadField($fieldName);
			});
		}

		$aclFields = array_filter($ogcPropertyList, function ($prop) { return ( false === strpos($prop, '/') ); });
		$nestedFields = array_reduce(
			array_filter($ogcPropertyList, function ($prop) { return ( false !== strpos($prop, '/') ); }),
			function ($ret, $propNested) {
				list($childName, $nestedPart) = explode('/', $propNested, 2);
				if (!array_key_exists($childName, $ret)) $ret[ $childName ] = [];
				$ret[ $childName ][] = $nestedPart;
				return $ret;
			},
			[]
		);
		if (!empty($nestedFields)) {
			$aclFields = array_unique(array_merge($aclFields, array_keys($nestedFields)));
		}
		DBG::log([$aclFields, $nestedFields], 'array', 'convertOgcPropsRecurse: splited to acl fields and nested fields');

		// TODO: convert '*' to fields (only local?)
		foreach ($aclFields as $fieldName) {
			if (!$acl->canReadField($fieldName)) throw new Exception("Access Denied to read field '{$fieldName}' from '" . $acl->getNamespace() . "'");
		}

		$contextFieldList = $aclFields;
		foreach ($nestedFields as $childName => $nestedProps) {
			$childNs = str_replace(['__x3A__', ':'], '/', $childName);
			if (!array_key_exists($childNs, $schemaCache)) {
				$schemaCache[$childNs] = SchemaFactory::loadDefaultObject('SystemObject')->getItem($childNs, [ 'propertyName' => '*,field' ]);
			}
			$contextFieldList = array_merge(
	   			$contextFieldList,
	   			array_map(function ($childCtxFld) use ($childName) {
					return "{$childName}/{$childCtxFld}";
				}, self::convertOgcPropsRecurse($schemaCache, $nestedProps, $schemaCache[$childNs], $dbgLoopNr + 1))
	   		);
		}
		DBG::log($contextFieldList, 'array', 'convertOgcPropsRecurse: return $contextFieldList');
		return $contextFieldList;
	}

	// TODO: add $contextAcl and context xpath to check for special perms by contextAcl
	public static function printXmlFeatureRecurse($xmlWriter, $acl, $item, $tagName, $attrs = [], $showAdvancedAttrs = false, $schemaCache = [], $printedFidLog = []) {
		$dbgFid = V::get('fid', 0, $attrs);
		if ($dbgFid) $printedFidLog[] = $dbgFid;
		if(V::get('DBG_XML', '', $_GET))$xmlWriter->writeComment("DBG: printXmlFeatureRecurse... '{$tagName}'" . ( $dbgFid ? " fid='{$dbgFid}'" : "" )); // TODO: DBG
		DBG::log($acl, 'array', "DBG: printXmlFeatureRecurse( ... {$tagName}, \$acl)" . ( $dbgFid ? " fid='{$dbgFid}'" : "" ));
		DBG::log($item, 'array', "DBG: printXmlFeatureRecurse( ... {$tagName}, \$item)" . ( $dbgFid ? " fid='{$dbgFid}'" : "" ));
		DBG::log([$attrs, $showAdvancedAttrs, array_keys($schemaCache), $printedFidLog], 'array', "DBG: printXmlFeatureRecurse( ... {$tagName}, \$attrs, \$showAdvancedAttrs, keys(\$schemaCache), \$printedFidLog)");
		// $rootWfsNs = 'p5';
		list($itemPrefix, $localName) = explode(':', $tagName);

		if (1 === count($item) && !empty($item['xlink'])) {
			// @example 'xlink' => 'https://biuro.biall-net.pl/wfs/default_db/CRM_PROCES#PROCES.857'
			$xlink = $item['xlink'];
			list($xlinkUrl, $xlinkFid) = explode('#', $xlink);

			// } else if (1 == count($item[$fldName]) && !empty($item[$fldName][0]['xlink'])) {
			// $xmlWriter->writeComment("TODO: xlinks for '{$fldName}'"); // TODO: DBG
			DBG::log($item[$fldName], 'array', "TODO: xlinks for '{$tagName}'");
			// $xlink = $item[$fldName][0]['xlink'];
			// $xlinkParts = explode(':', $xlink);
			// if (2 != count($xlinkParts)) throw new Exception("Error Processing Request - wrong xlink format for ".$acl->getName().".{$itemKey}/{$fldName}");
			// $xlinkParts[0] = Api_WfsNs::getNsUri($xlinkParts[0]);
			// $xlink = implode('#', $xlinkParts);
			$xmlWriter->startElement($tagName);
				foreach ($attrs as $name => $value) {
					$xmlWriter->writeAttribute($name, $value);
				}
				if ($showAdvancedAttrs && !$acl->canReadObjectField($fldName, (object)$item)) {
					$xmlWriter->writeAttribute("p5:allow_read", "false");
				}
				if ($showAdvancedAttrs && $acl->canWriteObjectField($fldName, (object)$item)) {
					$xmlWriter->writeAttribute("p5:allow_write", "true");
				}
				$xmlWriter->writeAttribute('xlink:href', $xlink);
			$xmlWriter->endElement();// {$itemPrefix}:{$fldName}
			return;
		}

		$xmlWriter->startElement($tagName);
		foreach ($attrs as $name => $value) {
			$xmlWriter->writeAttribute($name, $value);
		}

		$fldList = $acl->getRealFieldListByIdZasob();
		$geomFld = null;
		foreach ($fldList as $fldName) {
			if ($acl->isGeomField($fldName)) {
				$geomFld = $fldName;
			}
		}

		DBG::log($fldList, 'array', ">>> loop start fields(".count($fldList).")");
		foreach ($fldList as $idZasob => $fldName) {
			DBG::log(">>> loop {$idZasob} => {$fldName}...");
			$fldType = $acl->getXsdFieldType($fldName);
			DBG::log(">>> loop '{$fldName}' xsdType: '{$fldType}'");
			if (!$acl->canReadObjectField($fldName, (object)$item)) if(V::get('DBG_XML', '', $_GET))$xmlWriter->writeComment("DBG: skip - !canReadObjectField('{$fldName}')"); // TODO: DBG
			if (!$acl->canReadObjectField($fldName, (object)$item)) continue;
			DBG::log(">>> loop '{$fldName}' can read...");

			if ($geomFld != null && $fldName == $geomFld) {
				$xmlWriter->startElement("{$itemPrefix}:{$fldName}");
					if ($showAdvancedAttrs && !$acl->canReadObjectField($fldName, (object)$item)) {
						$xmlWriter->writeAttribute("p5:allow_read", "false");
					}
					if ($showAdvancedAttrs && $acl->canWriteObjectField($fldName, (object)$item)) {
						$xmlWriter->writeAttribute("p5:allow_write", "true");
					}
					(new Api_WfsGeomTypeConverter())->createGmlFromWkt_xmlWriter($item[$fldName], $xmlWriter);
				$xmlWriter->endElement();// {$itemPrefix}:{$fldName}
			} else if (is_array($item[$fldName])) {// TODO: by struct - REF field
				DBG::log($item[$fldName], 'array', ">>> loop({$itemKey}) REF item[{$itemKey}][{$fldName}]");
				if (empty($item[$fldName])) { // SKIP empty fields
					if(V::get('DBG_XML', '', $_GET))$xmlWriter->writeComment("DBG: skip empty field '{$fldName}'"); // TODO: DBG
					// $xmlWriter->h($fldName);
				} else {
					if(V::get('DBG_XML', '', $_GET))$xmlWriter->writeComment("DBG: TODO: array field... '{$fldName}'"); // TODO: DBG
					// $xmlWriter->writeComment("TODO: ".$acl->getName().".{$itemKey}/{$fldName} ...");
					$fieldNs = str_replace(['__x3A__', ':'], '/', $fldName); // substr($xsdType, 4));
					if (!array_key_exists($fieldNs, $schemaCache)) {
						// maybe only xlinks - acl not needed
						$firstItem = reset($item[$fldName]);
						if (1 === count($firstItem) && !empty($firstItem['xlink'])) {
							foreach ($item[$fldName] as $childItem) {
								self::printXmlFeatureRecurse($xmlWriter, $childAcl = null, $childItem, $fldName, [], $showAdvancedAttrs, $schemaCache, $printedFidLog);
							}
						} else {
							DBG::log($schemaCache, 'array', "Error Processing Request - field is not ref or missing acl ".$acl->getName().".{$itemKey}/{$fldName}");
							if(V::get('DBG_XML', '', $_GET))$xmlWriter->writeComment("Error Processing Request - field is not ref or missing acl ".$acl->getName().".{$itemKey}/{$fldName}");
						}
					} else {
						DBG::log($schemaCache[$fieldNs], 'array', "TODO: xxxxxxx ".$acl->getName().".{$itemKey}/{$fldName}");
						$childAcl = Core_AclHelper::getAclByNamespace($schemaCache[$fieldNs]['namespace'], false, $schemaCache[$fieldNs]);
						$childName = $schemaCache[$fieldNs]['name'];
						foreach ($item[$fldName] as $childItem) {
							$childPK = V::get($childAcl->getPrimaryKeyField(), '', $childItem);
							self::printXmlFeatureRecurse($xmlWriter, $childAcl, $childItem, $fldName, ($childPK) ? [ 'fid' => "{$childName}.{$childPK}" ] : [], $showAdvancedAttrs, $schemaCache, $printedFidLog);
						}
						// foreach ($item[$fldName] as $refItem) {
						// 	DBG::log($refItem, 'array', "\$refItem fld({$fldName})");
						// 	if (1 == count($refItem) && !empty($refItem['xlink'])) {
						// 		$xmlWriter->startElement($schemaCache[$fieldNs]['typeName']);
						// 		$xmlWriter->writeAttribute("xlink:href", $refItem['xlink']);
						// 		$xmlWriter->endElement();
						// 	} else {
						// 		$xmlWriter->writeComment("DBG: array field ref ... '{$fldName}'"); // TODO: DBG
						// 		$xmlWriter->startElement($schemaCache[$fieldNs]['typeName']);
						// 		foreach ($schemaCache[$fieldNs]['field'] as $field) {
						// 			if (array_key_exists($field['fieldNamespace'], $refItem)) {
						// 				$xmlWriter->writeComment("REF field ({$field['fieldNamespace']}) value({$refItem[$field['fieldNamespace']]}) TODO: get xsdType - TODO: recurse");
						// 				DBG::log($refItem[$field['fieldNamespace']], 'array', "REF field ({$field['fieldNamespace']}) TODO: get xsdType - TODO: recurse");
						// 				if (false !== strpos($field['fieldNamespace'], ':')) { // is ref - TODO: better check by xsdType
						// 					$xmlWriter->startElement($field['fieldNamespace']);
						// 					$xmlWriter->writeComment("TODO: recurse ...");
						// 					// $xmlWriter->text($refItem[$field['fieldNamespace']]);
						// 					$xmlWriter->endElement();
						// 				} else {
						// 					$xmlWriter->startElement("{$schemaCache[$fieldNs]['nsPrefix']}:{$field['fieldNamespace']}");
						// 					$xmlWriter->text($refItem[$field['fieldNamespace']]);
						// 					$xmlWriter->endElement();
						// 				}
						// 			}
						// 		}
						// 		$xmlWriter->endElement();
						// 	}
						// }
					}
				}
			} else if ('xsd:base64Binary' === $acl->getXsdFieldType($fldName)) {
				if (empty($item[$fldName]) && '0' !== $item[$fldName]) continue;
				$xmlWriter->startElement("{$itemPrefix}:{$fldName}");
					if ($showAdvancedAttrs && !$acl->canReadObjectField($fldName, (object)$item)) {
						$xmlWriter->writeAttribute("p5:allow_read", "false");
					}
					if ($showAdvancedAttrs && $acl->canWriteObjectField($fldName, (object)$item)) {
						$xmlWriter->writeAttribute("p5:allow_write", "true");
					}
					$xmlWriter->text(base64_encode($item[$fldName]));
				$xmlWriter->endElement();// {$itemPrefix}:{$fldName}
			} else {
				$value = str_replace('&', '&amp;', $item[$fldName]);
				if (empty($value) && '0' !== $value) {
					continue;
				} else {
					$xmlWriter->startElement("{$itemPrefix}:{$fldName}");
						if ($showAdvancedAttrs && !$acl->canReadObjectField($fldName, (object)$item)) {
							$xmlWriter->writeAttribute("p5:allow_read", "false");
						}
						if ($showAdvancedAttrs && $acl->canWriteObjectField($fldName, (object)$item)) {
							$xmlWriter->writeAttribute("p5:allow_write", "true");
						}
						$xmlWriter->text($value);
					$xmlWriter->endElement();// {$itemPrefix}:{$fldName}
				}
			}
		}
		$xmlWriter->endElement();
	}

}