<?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, $dbgLoopNr = 0, $dbgXpath = $acl->getNamespace());
	}
	public static function convertOgcPropsRecurse(&$schemaCache, $ogcPropertyList, $aclOrSchema, $dbgLoopNr = 0, $dbgXpath = '') {
		if ($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)) {
			if (array_key_exists('*', $nestedFields)) { // add missing local fields if xpath like '*/...'
				$aclFields[] = '*';
			}
		}
		if (!empty($nestedFields)) { // add nested part to refs if xpath like '*/...'
			if (array_key_exists('*', $nestedFields)) {
				$nestedParts = $nestedFields['*'];
				unset($nestedFields['*']);
				DBG::log($nestedParts, 'array', "convertOgcPropsRecurse: TODO: '*' in \$nestedFields - \$nestedParts ns({$dbgXpath})");
				$canReadRefs = array_values($acl->getFieldListByIdZasob());
				$canReadRefs = array_filter($canReadRefs, function ($fieldName) use ($acl) {
					return (false !== strpos($fieldName, ":") && $acl->canReadField($fieldName));
				});
				foreach ($canReadRefs as $refField) {
					foreach ($nestedParts as $nestedPart) {
						$nestedFields[ $refField ][] = $nestedPart;
					}
				}
			}
		}
		if (!empty($nestedFields)) {
			$aclFields = array_unique(array_merge($aclFields, array_keys($nestedFields)));
		}
		if (in_array('*', $aclFields)) {
			$aclFields = array_filter($aclFields, function ($fieldName) { return ( '*' !== $fieldName); });
			$allAclFields = array_values($acl->getFieldListByIdZasob());
			$allAclFields = array_filter($allAclFields, function ($fieldName) use ($acl) {
				return $acl->canReadField($fieldName);
			});
			if ($allAclFields) $aclFields = array_unique(array_merge($aclFields, $allAclFields));
		}
		DBG::log([$aclFields, $nestedFields], 'array', "convertOgcPropsRecurse: splited to acl fields and nested fields ns({$dbgXpath})");

		foreach ($aclFields as $fieldName) {
			if (!$acl->canReadField($fieldName)) throw new Exception("Access Denied to read field '{$fieldName}' from '" . $acl->getNamespace() . "'");
		}

		foreach ($aclFields as $fieldName) {
			if (false !== strpos($fieldName, ':')) {
				$childNs = str_replace(['__x3A__', ':'], '/', $fieldName);
				$schemaCache[$childNs] = SchemaFactory::loadDefaultObject('SystemObject')->getItem($childNs, [ 'propertyName' => '*,field' ]);
			}
		}

		$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' ]);
			}
			$childCtxFields = array_map(function ($childCtxFld) use ($childName) {
				return "{$childName}/{$childCtxFld}";
			}, self::convertOgcPropsRecurse($schemaCache, $nestedProps, $schemaCache[$childNs], $dbgLoopNr + 1, "{$dbgXpath}/{$childName}"));
			DBG::log([ $contextFieldList, $childCtxFields ], 'array', "convertOgcPropsRecurse: array merge ns({$dbgXpath})");
			$contextFieldList = array_merge( $contextFieldList, $childCtxFields );
			DBG::log($contextFieldList, 'array', "convertOgcPropsRecurse: array merged ns({$dbgXpath})");
		}
		DBG::log($contextFieldList, 'array', "convertOgcPropsRecurse: return \$contextFieldList ns({$dbgXpath})");
		return $contextFieldList;
	}

	// TODO: add $contextAcl and context xpath to check for special perms by contextAcl
	/** @example:
	 * 		Api_Wfs_GetFeature::printXmlFeatureRecurse($xmlWriter, $acl, $item, [
	 * 			'fields' => $searchParams['cols'],
	 * 			'tagName' => "{$wfsNs}:{$type}",
	 * 			'showAdvancedAttrs' => !$simple,
	 * 			'xsdAttributes' => array_merge(
	 * 				[ 'fid' => "{$type}.{$itemKey}" ],
	 * 				(!$simple)
	 * 				?	[ "{$rootWfsNs}:web_link" => Request::getPathUri() . "index.php?_route=ViewTableAjax&namespace=" . $acl->getNamespace() . "#EDIT/{$itemKey}" ]
	 * 				:	[]
	 * 			)
	 * 		], $schemaCache, $printedFidLog);
	 */
	public static function printXmlFeatureRecurse($xmlWriter, $acl, $item, $params = [], $schemaCache = [], $printedFidLog = []) {
		$showFields = V::get('fields', [], $params, 'array'); // TODO: if empty $showFields ?
		$tagName = V::get('tagName', '', $params);
		$attrs = V::get('xsdAttributes', [], $params, 'array');
		$showAdvancedAttrs = V::get('showAdvancedAttrs', false, $params, 'bool');
		$dbgFid = V::get('fid', 0, $attrs);
		$outputBlobFormat = V::get('outputBlobFormat', '', $params, 'word');
		if(V::get('DBG_XML', '', $_GET))$xmlWriter->writeComment("DBG: print Xml Feature Recurse... '{$tagName}'" . ( $dbgFid ? " fid='{$dbgFid}'" : "" )); // TODO: DBG
		// DBG::log($acl, 'array', "DBG: print Xml Feature Recurse( ... {$tagName}, \$acl)" . ( $dbgFid ? " fid='{$dbgFid}'" : "" ) . " \$acl");
		DBG::log($item, 'array', "DBG: print Xml Feature Recurse( ... {$tagName}, \$item)" . ( $dbgFid ? " fid='{$dbgFid}'" : "" ) . " \$item");
		DBG::log($showFields, 'array', "DBG: print Xml Feature Recurse( ... {$tagName}, \$item)" . ( $dbgFid ? " fid='{$dbgFid}'" : "" ) . " \$showFields");
		DBG::log([$attrs, $showAdvancedAttrs, array_keys($schemaCache), $printedFidLog], 'array', "DBG: print Xml Feature Recurse( ... {$tagName}, \$attrs, \$showAdvancedAttrs, keys(\$schemaCache), \$printedFidLog)");
		if ($dbgFid) {
			if (in_array($dbgFid, $printedFidLog)) {
				DBG::log("TODO: in_array({$dbgFid}, \$printedFidLog)");
			}
		}
		if ($dbgFid) $printedFidLog[] = $dbgFid;
		// $rootWfsNs = 'p5';
		list($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);

			DBG::log($item[$fldName], 'array', "xlinks for '{$tagName}'");
			$xmlWriter->startElement($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();
		$fldList = $acl->getFieldListByIdZasob();
		$geomFld = null;
		foreach ($fldList as $fldName) {
			if ($acl->isGeomField($fldName)) {
				$geomFld = $fldName;
			}
		}

		DBG::log($fldList, 'array', ">>> loop start fields(".count($fldList).")");
		// DBG::log($showFields, 'array', "DBG: \$showLocalFields \$showFields 0");
		$showLocalFields = ($showFields) // if empty filter cols show all local fields
		?	array_filter($showFields, function ($showFieldName) {
				return (false === strpos($showFieldName, "/"));
			})
		:	$fldList;
		DBG::log($showLocalFields, 'array', "DBG: \$showLocalFields");
		$fldList = array_filter($fldList, function ($fieldName) use ($showLocalFields) {
			return (in_array($fieldName, $showLocalFields));
		});
		DBG::log($fldList, 'array', ">>> loop start filtered 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'])) { // TODO: $schemaCache[$fieldNs] must exists for xlinks - xlmns is required
							foreach ($item[$fldName] as $childItem) {
								self::printXmlFeatureRecurse($xmlWriter, $childAcl = null, $childItem, [
									'fields' => [],
									'tagName' => $fldName,
									'xsdAttributes' => [],
									'showAdvancedAttrs' => $showAdvancedAttrs,
									'outputBlobFormat' => $outputBlobFormat,
								], $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[$fieldNs], 'array', "fetch child acl ".$acl->getName().".{$itemKey}/{$fldName}");
						$childAcl = Core_AclHelper::getAclByNamespace($schemaCache[$fieldNs]['namespace'], false, $schemaCache[$fieldNs]);
						$childName = $schemaCache[$fieldNs]['name'];
						foreach ($item[$fldName] as $childItem) {
							// DBG::log($showFields, 'array', "DBG: fld({$fldName}) \$showFields 0");
							$showChildFields = array_filter($showFields, function ($showFieldName) use ($fldName) {
								return ("{$fldName}/" === substr("{$showFieldName}", 0, strlen($fldName) + 1));
							});
							// DBG::log($showChildFields, 'array', "DBG: fld({$fldName}) \$showChildFields 1");
							$showChildFields = array_map(function ($showFieldName) use ($fldName) {
								return substr($showFieldName, strlen($fldName) + 1);
							}, $showChildFields);
							// DBG::log($showChildFields, 'array', "DBG: fld({$fldName}) \$showChildFields 2");
							$childPK = V::get($childAcl->getPrimaryKeyField(), '', $childItem);
							self::printXmlFeatureRecurse($xmlWriter, $childAcl, $childItem, [
								'fields' => $showChildFields,
								'tagName' => $fldName,
								'xsdAttributes' => ($childPK) ? [ 'fid' => "{$childName}.{$childPK}" ] : [],
								'showAdvancedAttrs' => $showAdvancedAttrs,
								'outputBlobFormat' => $outputBlobFormat,
							], $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])) continue; //  && '0' !== $item[$fldName]
				$xmlWriter->startElement("{$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");
					}
					$pk = V::get($acl->getPrimaryKeyField(), '', $item);
					if ($showAdvancedAttrs) {
						$xmlWriter->writeAttribute("p5:blobUrl", Request::getPathUri() . "wfs-data.php?" . implode("&", [
							"SERVICE=WFS", "VERSION=1.0.0", "REQUEST=GetBlob",
							"namespace=" . $acl->getNamespace(),
							"primaryKey={$pk}",
							"fieldName={$fldName}",
						]));
					}
					if (in_array($item[$fldName], ['0', '1'])) {
						if ('base64' === $outputBlobFormat) {
							$content = DB::getPDO( $acl->getDatabaseID() )->getBlob( $acl->getRootTableName(), $fldName, $acl->getPrimaryKeyField(), $pk );
							$xmlWriter->text(base64_encode($content));
						} else if ('link' === $outputBlobFormat) {
							$xmlWriter->text($item[$fldName]);
						} else { // hide
							throw new Exception("Not implemented outputBlobFormat - expected base64 or link");
						}
					} else {
						$xmlWriter->text(base64_encode($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();
	}

}