/*
  Licensed to the Apache Software Foundation (ASF) under one
  or more contributor license agreements.  See the NOTICE file
  distributed with this work for additional information
  regarding copyright ownership.  The ASF licenses this file
  to you under the Apache License, Version 2.0 (the
  "License"); you may not use this file except in compliance
  with the License.  You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing,
  software distributed under the License is distributed on an
  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  KIND, either express or implied.  See the License for the
  specific language governing permissions and limitations
  under the License.
 */

#import "CMISAtomPubDiscoveryService.h"
#import "CMISQueryAtomEntryWriter.h"
#import "CMISAtomPubConstants.h"
#import "CMISAtomFeedParser.h"
#import "CMISHttpResponse.h"
#import "CMISObjectList.h"
#import "CMISErrors.h"
#import "CMISLog.h"

@implementation CMISAtomPubDiscoveryService

- (CMISRequest*)query:(NSString *)statement
    searchAllVersions:(BOOL)searchAllVersions
        relationships:(CMISIncludeRelationship)relationships
      renditionFilter:(NSString *)renditionFilter
includeAllowableActions:(BOOL)includeAllowableActions
             maxItems:(NSNumber *)maxItems
            skipCount:(NSNumber *)skipCount
      completionBlock:(void (^)(CMISObjectList *objectList, NSError *error))completionBlock
{
    // Validate params
    if (statement == nil) {
        CMISLogError(@"Must provide 'statement' parameter when executing a cmis query");
        completionBlock(nil, [CMISErrors createCMISErrorWithCode:kCMISErrorCodeInvalidArgument detailedDescription:nil]);
        return nil;
    }
    
    // Validate query uri
    NSString *queryUrlString = [self.bindingSession objectForKey:kCMISAtomBindingSessionKeyQueryCollection];
    if (queryUrlString == nil) {
        CMISLogDebug(@"Unknown repository or query not supported!");
        completionBlock(nil, [CMISErrors createCMISErrorWithCode:kCMISErrorCodeObjectNotFound detailedDescription:nil]);
        return nil;
    }
    
    NSURL *queryURL = [NSURL URLWithString:queryUrlString];
    // Build XML for query
    CMISQueryAtomEntryWriter *atomEntryWriter = [[CMISQueryAtomEntryWriter alloc] init];
    atomEntryWriter.statement = statement;
    atomEntryWriter.searchAllVersions = searchAllVersions;
    atomEntryWriter.includeAllowableActions = includeAllowableActions;
    atomEntryWriter.relationships = relationships;
    atomEntryWriter.renditionFilter = renditionFilter;
    atomEntryWriter.maxItems = maxItems;
    atomEntryWriter.skipCount = skipCount;
    
    CMISRequest *request = [[CMISRequest alloc] init];
    // Execute HTTP call
    [self.bindingSession.networkProvider invokePOST:queryURL
                                            session:self.bindingSession
                                               body:[[atomEntryWriter generateAtomEntryXML] dataUsingEncoding:NSUTF8StringEncoding]
                                            headers:[NSDictionary dictionaryWithObject:kCMISMediaTypeQuery forKey:@"Content-type"]
                                        cmisRequest:request
                                    completionBlock:^(CMISHttpResponse *httpResponse, NSError *error) {
             if (httpResponse) {
                 CMISAtomFeedParser *feedParser = [[CMISAtomFeedParser alloc] initWithData:httpResponse.data];
                 NSError *error = nil;
                 if ([feedParser parseAndReturnError:&error]) {
                     NSString *nextLink = [feedParser.linkRelations linkHrefForRel:kCMISLinkRelationNext];
                     
                     CMISObjectList *objectList = [[CMISObjectList alloc] init];
                     objectList.hasMoreItems = (nextLink != nil);
                     objectList.numItems = feedParser.numItems;
                     objectList.objects = feedParser.entries;
                     completionBlock(objectList, nil);
                 } else {
                     completionBlock(nil, [CMISErrors cmisError:error cmisErrorCode:kCMISErrorCodeRuntime]);
                 }
             } else {
                 completionBlock(nil, [CMISErrors cmisError:error cmisErrorCode:kCMISErrorCodeConnection]);
             }
         } ];
    return request;
}

- (CMISRequest*)retrieveContentChanges:(CMISStringInOutParameter *)changeLogTokenParam
                     includeProperties:(BOOL)includeProperties
                                filter:(NSString *)filter
                      includePolicyIds:(BOOL)includePolicyIds
                            includeAcl:(BOOL)includeAcl
                              maxItems:(NSNumber *)maxItems
                       completionBlock:(void (^)(CMISObjectList *objectList, NSError *error))completionBlock
{
    // TODO implement
    completionBlock(nil, [CMISErrors createCMISErrorWithCode:kCMISErrorCodeRuntime detailedDescription:@"not implemented!"]);
    return nil;
}

@end