/* MAPIStoreCalendarMessage.m - this file is part of SOGo
 *
 * Copyright (C) 2011-2012 Inverse inc
 *
 * Author: Wolfgang Sourdeau <wsourdeau@inverse.ca>
 *
 * This file is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3, or (at your option)
 * any later version.
 *
 * This file is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

/* TODO:
   - merge common code with tasks
   - take the tz definitions from Outlook */

#include <talloc.h>
#include <util/attr.h>

#import <Foundation/NSArray.h>
#import <Foundation/NSCalendarDate.h>
#import <Foundation/NSData.h>
#import <Foundation/NSDictionary.h>
#import <Foundation/NSString.h>
#import <Foundation/NSTimeZone.h>
#import <EOControl/EOQualifier.h>
#import <EOControl/EOFetchSpecification.h>
#import <NGObjWeb/WOContext+SoObjects.h>
#import <NGExtensions/NSObject+Logs.h>
#import <GDLContentStore/GCSFolder.h>
#import <NGCards/iCalAlarm.h>
#import <NGCards/iCalCalendar.h>
#import <NGCards/iCalEvent.h>
#import <NGCards/iCalDateTime.h>
#import <NGCards/iCalPerson.h>
#import <NGCards/iCalTimeZone.h>
#import <NGCards/iCalTrigger.h>
#import <SOGo/SOGoPermissions.h>
#import <SOGo/SOGoUser.h>
#import <SOGo/SOGoUserManager.h>
#import <Appointments/SOGoAppointmentFolder.h>
#import <Appointments/SOGoAppointmentObject.h>
#import <Appointments/iCalEntityObject+SOGo.h>
#import <Mailer/NSString+Mail.h>

#import "iCalEvent+MAPIStore.h"
#import "MAPIStoreAppointmentWrapper.h"
#import "MAPIStoreCalendarAttachment.h"
#import "MAPIStoreCalendarFolder.h"
#import "MAPIStoreContext.h"
#import "MAPIStoreMapping.h"
#import "MAPIStoreRecurrenceUtils.h"
#import "MAPIStoreTypes.h"
#import "MAPIStoreUserContext.h"
#import "NSDate+MAPIStore.h"
#import "NSData+MAPIStore.h"
#import "NSObject+MAPIStore.h"
#import "NSString+MAPIStore.h"
#import "NSValue+MAPIStore.h"

#import "MAPIStoreCalendarMessage.h"

#undef DEBUG
#include <stdbool.h>
#include <gen_ndr/exchange.h>
#include <gen_ndr/property.h>
#include <libmapi/libmapi.h>
#include <mapistore/mapistore.h>
#include <mapistore/mapistore_errors.h>
#include <mapistore/mapistore_nameid.h>

// extern void ndr_print_AppointmentRecurrencePattern(struct ndr_print *ndr, const char *name, const struct AppointmentRecurrencePattern *r);

static Class NSArrayK, MAPIStoreAppointmentWrapperK;

@implementation SOGoAppointmentObject (MAPIStoreExtension)

- (Class) mapistoreMessageClass
{
  return [MAPIStoreCalendarMessage class];
}

@end

@implementation MAPIStoreCalendarMessage

+ (void) initialize
{
  NSArrayK = [NSArray class];
  MAPIStoreAppointmentWrapperK = [MAPIStoreAppointmentWrapper class];
}

+ (enum mapistore_error) getAvailableProperties: (struct SPropTagArray **) propertiesP
                                       inMemCtx: (TALLOC_CTX *) memCtx
{
  BOOL listedProperties[65536];
  NSUInteger count;
  uint16_t propId;

  memset (listedProperties, NO, 65536 * sizeof (BOOL));
  [super getAvailableProperties: propertiesP inMemCtx: memCtx];
  for (count = 0; count < (*propertiesP)->cValues; count++)
    {
      propId = ((*propertiesP)->aulPropTag[count] >> 16) & 0xffff;
      listedProperties[propId] = YES;
    }
  [MAPIStoreAppointmentWrapper fillAvailableProperties: *propertiesP
                                        withExclusions: listedProperties];

  return MAPISTORE_SUCCESS;
}

- (id) init
{
  if ((self = [super init]))
    {
      calendar = nil;
      masterEvent = nil;
    }

  return self;
}

- (void) _setupAttachmentParts
{
  NSUInteger count, max;
  NSArray *events;
  NSString *newKey;
  MAPIStoreCalendarAttachment *attachment;
  NSUInteger aid;
  iCalEvent *event;

  events = [calendar events];
  max = [events count];
  for (count = 1; count < max; count++)
    {
      attachment = [MAPIStoreCalendarAttachment
                      mapiStoreObjectInContainer: self];
      /* we now that there are no attachments yet, so we can assume that the
         right AID is 0 from the start */
      aid = count - 1;
      [attachment setAID: aid];
      event = [events objectAtIndex: count];
      [attachment setEvent: event];
      newKey = [[event uniqueChildWithTag: @"recurrence-id"]
                 flattenedValuesForKey: @""];
      [attachmentParts setObject: attachment forKey: newKey];
    }
}

- (id) initWithSOGoObject: (id) newSOGoObject
              inContainer: (MAPIStoreObject *) newFolder
{
  MAPIStoreContext *context;
  MAPIStoreUserContext *userContext;
  iCalCalendar *origCalendar;
  MAPIStoreAppointmentWrapper *appointmentWrapper;

  if ((self = [super initWithSOGoObject: newSOGoObject
                            inContainer: newFolder]))
    {
      if ([newSOGoObject isNew])
        {
          ASSIGN (calendar, [iCalCalendar groupWithTag: @"vcalendar"]);
          [calendar setVersion: @"2.0"];
          [calendar setProdID: @"-//Inverse inc.//OpenChange+SOGo//EN"];
          masterEvent = [iCalEvent groupWithTag: @"vevent"];
          [calendar addChild: masterEvent];
          [masterEvent setCreated: [NSCalendarDate date]];
        }
      else
        {
          origCalendar = [sogoObject calendar: YES secure: YES];
          if (!origCalendar)
            {
              [self errorWithFormat: @"Incorrect calendar event %@. Empty message is created",
                    [self url]];
              return self;
            }
          calendar = [origCalendar mutableCopy];
          masterEvent = [[calendar events] objectAtIndex: 0];
          [self _setupAttachmentParts];
        }
      context = [self context];
      userContext = [self userContext];
      appointmentWrapper
        = [MAPIStoreAppointmentWrapper wrapperWithICalEvent: masterEvent
                                                    andUser: [userContext sogoUser]
                                             andSenderEmail: nil
                                         withConnectionInfo: [context connectionInfo]];
      [self addProxy: appointmentWrapper];
    }

  return self;
}

- (void) dealloc
{
  //NSLog(@"MAPIStoreCalendarMessage: -dealloc (%p)", self);
  [calendar release];
  [super dealloc];
}

- (MAPIStoreAppointmentWrapper *) _appointmentWrapper
{
  NSUInteger i, max;
  id proxy;
  max = [proxies count];
  for (i = 0; i < max; i++) {
    proxy = [proxies objectAtIndex: i];
    if ([proxy isKindOfClass: MAPIStoreAppointmentWrapperK])
      {
        return proxy;
      }
  }
  return nil;
}


/* getters */
- (int) getPidTagMessageClass: (void **) data
                     inMemCtx: (TALLOC_CTX *) memCtx
{
  SOGoUser *owner;

  owner = [[self userContext] sogoUser];
  if ([masterEvent userAsAttendee: owner])
    *data = talloc_strdup (memCtx, "IPM.Schedule.Meeting.Request");
  else
    *data = talloc_strdup (memCtx, "IPM.Appointment");

  return MAPISTORE_SUCCESS;
}

- (int) getPidLidSideEffects: (void **) data // TODO
                    inMemCtx: (TALLOC_CTX *) memCtx
{
  *data = MAPILongValue (memCtx,
                         seOpenToDelete | seOpenToCopy | seOpenToMove
                         | seCoerceToInbox | seOpenForCtxMenu);

  return MAPISTORE_SUCCESS;
}

- (int) getPidTagProcessed: (void **) data inMemCtx: (TALLOC_CTX *) memCtx
{
  return [self getYes: data inMemCtx: memCtx];
}

- (void) getMessageData: (struct mapistore_message **) dataPtr
               inMemCtx: (TALLOC_CTX *) memCtx
{
  static NSString *recTypes[] = {@"orig", @"to", @"cc", @"bcc"};
  static NSInteger recTypesValue[] = {MAPI_ORIG, MAPI_TO, MAPI_CC, MAPI_BCC};
  struct mapistore_message *msgData;
  NSDictionary *recipients, *contactInfos;
  NSString *email;
  NSArray *attendees;
  NSDictionary *attendee;
  SOGoUserManager *mgr;
  struct mapistore_message_recipient *recipient;
  NSUInteger nRecType, maxRecTypes, count, max, propCount;
  NSObject *currentValue;

  [super getMessageData: &msgData inMemCtx: memCtx];

  /* The presence of the "recipients" meta-property means that our most recent
     list of recipients has not been saved yet and that we must return that
     one instead of the one stored in the event. */
  recipients = [properties objectForKey: @"recipients"];
  if (recipients)
    {
      mgr = [SOGoUserManager sharedUserManager];

      /* TODO: this code might need to be moved into MAPIStoreMessage */
      msgData->columns = set_SPropTagArray (msgData, 9,
                                            PR_OBJECT_TYPE,
                                            PR_DISPLAY_TYPE,
                                            PR_7BIT_DISPLAY_NAME_UNICODE,
                                            PR_SMTP_ADDRESS_UNICODE,
                                            PR_SEND_INTERNET_ENCODING,
                                            PR_RECIPIENT_DISPLAY_NAME_UNICODE,
                                            PR_RECIPIENT_FLAGS,
                                            PR_RECIPIENT_ENTRYID,
                                            PR_RECIPIENT_TRACKSTATUS);

      maxRecTypes = sizeof(recTypes) / sizeof(recTypes[0]);
      for (nRecType = 0; nRecType < maxRecTypes; nRecType++)
        {
          attendees = [recipients objectForKey: recTypes[nRecType]];
          max = [attendees count];
          if (max > 0)
            {
              msgData->recipients_count += max;
              msgData->recipients = talloc_realloc(msgData,
                                                   msgData->recipients, struct
                                                   mapistore_message_recipient, msgData->recipients_count);
              recipient = msgData->recipients;
              for (count = 0; count < max; count++)
                {
                  attendee = [attendees objectAtIndex: count];
                  recipient->type = recTypesValue[nRecType];
                  email = [attendee objectForKey: @"email"];
                  if (email)
                    {
                      contactInfos
                        = [mgr contactInfosForUserWithUIDorEmail: email];
                      recipient->username = [[contactInfos
                                               objectForKey: @"c_uid"]
                                              asUnicodeInMemCtx: msgData];
                    }
                  else
                    recipient->username = NULL;

                  recipient->data = talloc_array(msgData, void *,
                                                 msgData->columns->cValues);
                  for (propCount = 0;
                       propCount < msgData->columns->cValues;
                       propCount++)
                    {
                      currentValue = [attendee objectForKey: MAPIPropertyKey (msgData->columns->aulPropTag[propCount])];
                      [currentValue getValue: recipient->data + propCount
                                      forTag: msgData->columns->aulPropTag[propCount]
                                    inMemCtx: msgData];
                    }
                  recipient++;
                }
            }
        }
    }
  else
    {
      [[self _appointmentWrapper] fillMessageData: msgData
                                         inMemCtx: memCtx];
    }

  *dataPtr = msgData;
}

- (int) getPidTagResponseRequested: (void **) data
                          inMemCtx: (TALLOC_CTX *) memCtx
{
  return [self getYes: data inMemCtx: memCtx];
}

/* This three methods: getPidTagNormalizedSubject,
   getPidTagSensitivity and getPidTagImportance are implemented in
   MAPIStoreMessage base class, then the proxy method is not reached
   (see MAPIStoreObject).
*/
- (int) getPidTagNormalizedSubject: (void **) data
                          inMemCtx: (TALLOC_CTX *) memCtx
{
  MAPIStoreAppointmentWrapper *appointmentWrapper;

  appointmentWrapper = [self _appointmentWrapper];
  if (appointmentWrapper)
    return [appointmentWrapper getPidTagNormalizedSubject: data inMemCtx: memCtx];

  return MAPISTORE_ERR_NOT_FOUND;
}

- (int) getPidTagSensitivity: (void **) data
                    inMemCtx: (TALLOC_CTX *) memCtx
{
  MAPIStoreAppointmentWrapper *appointmentWrapper;

  appointmentWrapper = [self _appointmentWrapper];
  if (appointmentWrapper)
    return [appointmentWrapper getPidTagSensitivity: data inMemCtx: memCtx];

  return [self getLongZero: data inMemCtx: memCtx];
}

- (int) getPidTagImportance: (void **) data
                    inMemCtx: (TALLOC_CTX *) memCtx
{
  MAPIStoreAppointmentWrapper *appointmentWrapper;

  appointmentWrapper = [self _appointmentWrapper];
  if (appointmentWrapper)
    return [appointmentWrapper getPidTagImportance: data inMemCtx: memCtx];

  *data = MAPILongValue (memCtx, 1);

  return MAPISTORE_SUCCESS;
}


- (NSString *) _uidFromGlobalObjectId: (TALLOC_CTX *) memCtx 
{
  NSData *objectId;
  NSString *uid = nil;
  char *bytesDup, *uidStart;
  NSUInteger length;

  /* NOTE: we only handle the generic case at the moment, see
     MAPIStoreAppointmentWrapper */
  objectId = [properties
               objectForKey: MAPIPropertyKey (PidLidGlobalObjectId)];
  if (objectId)
    {
      length = [objectId length];
      bytesDup = talloc_array (memCtx, char, length + 1);
      memcpy (bytesDup, [objectId bytes], length);
      bytesDup[length] = 0;
      uidStart = bytesDup + length - 1;
      while (uidStart != bytesDup && *(uidStart - 1))
        uidStart--;
      if (uidStart > bytesDup && *uidStart)
        uid = [NSString stringWithUTF8String: uidStart];
      talloc_free (bytesDup);
    }

  return uid;
}

- (SOGoAppointmentObject *) _resurrectRecord: (NSString *) cname
                                  fromFolder: (SOGoAppointmentFolder *) folder
{
  NSArray *records;
  EOQualifier *qualifier;
  EOFetchSpecification *fs;
  GCSFolder *ocsFolder;
  SOGoAppointmentObject *newObject;
  NSMutableDictionary *newRecord;
  static NSArray *childRecordFields = nil;

  if (!childRecordFields)
    {
      childRecordFields = [NSArray arrayWithObjects: @"c_name",
				   @"c_creationdate", @"c_lastmodified",
				   @"c_content", nil];
      [childRecordFields retain];
    }

  ocsFolder = [folder ocsFolder];

  qualifier
    = [EOQualifier qualifierWithQualifierFormat:
                     [NSString stringWithFormat: @"c_name='%@'", cname]];
  fs = [EOFetchSpecification fetchSpecificationWithEntityName: [ocsFolder folderName]
                                                    qualifier: qualifier
                                                sortOrderings: nil];
  records = [ocsFolder fetchFields: childRecordFields
                fetchSpecification: fs
                     ignoreDeleted: NO];
  if ([records isKindOfClass: NSArrayK] && [records count])
    {
      newRecord = [[records objectAtIndex: 0] mutableCopy];
      [newRecord setObject: [NSNumber numberWithInt: 0]
                    forKey: @"c_version"];
      newObject = [SOGoAppointmentObject objectWithRecord: newRecord
                                              inContainer: folder];
      [newRecord autorelease];
      [newObject setIsNew: NO];
    }
  else
    newObject = nil;


  return newObject;
}

- (void) _fixupAppointmentObjectWithUID: (NSString *) uid
{
  NSString *cname, *url;
  MAPIStoreMapping *mapping;
  uint64_t objectId;
  WOContext *woContext;
  SOGoAppointmentFolder *folder;
  SOGoAppointmentObject *newObject;

  cname = [[container sogoObject] resourceNameForEventUID: uid];
  if (cname)
    isNew = NO;
  else
    cname = [NSString stringWithFormat: @"%@.ics", uid];

  mapping = [self mapping];

  url = [NSString stringWithFormat: @"%@%@", [container url], cname];
  folder = [sogoObject container];

  /* reinstantiate the old sogo object and attach it to self */
  [[self userContext] activate];
  woContext = [[self userContext] woContext];
  if (isNew)
    {
      /* event could have been deleted, let's try to resurrect it */
      newObject = [self _resurrectRecord: cname fromFolder: folder];
      if (!newObject)
        {
          newObject = [SOGoAppointmentObject objectWithName: cname
                                                inContainer: folder];
          [newObject setIsNew: YES];
        }
    }
  else
    {
      /* dissociate the object url from the old object's id */
      objectId = [mapping idFromURL: url];
      [mapping unregisterURLWithID: objectId];
      newObject = [folder lookupName: cname
                           inContext: woContext
                             acquire: NO];
    }

  /* dissociate the object url associated with this object, as we want to
     discard it */
  objectId = [self objectId];
  [mapping unregisterURLWithID: objectId];
      
  /* associate the new object url with this object id */
  [mapping registerURL: url withID: objectId];

  [newObject setContext: woContext];
  ASSIGN (sogoObject, newObject);
}

- (BOOL) subscriberCanReadMessage
{
  NSArray *roles;

  roles = [self activeUserRoles];

  return ([roles containsObject: SOGoCalendarRole_ComponentViewer]
          || [roles containsObject: SOGoCalendarRole_ComponentDAndTViewer]
          || [self subscriberCanModifyMessage]);
}

- (BOOL) subscriberCanModifyMessage
{
  BOOL rc;
  NSArray *roles = [self activeUserRoles];

  if (isNew)
    rc = [roles containsObject: SOGoRole_ObjectCreator];
  else
    rc = ([roles containsObject: SOGoCalendarRole_ComponentModifier]
          || [roles containsObject: SOGoCalendarRole_ComponentResponder]);

  return rc;
}

- (void) _updateAttachedEvents
{
  NSArray *allAttachments;
  NSUInteger count, max;
  NSString *uid, *summary;
  iCalEvent *event;
  MAPIStoreCalendarAttachment *attachment;

  /* ensure that all exception events have the same UID as the master */
  uid = [masterEvent uid];
  summary = [masterEvent summary];

  allAttachments = [attachmentParts allValues];
  max = [allAttachments count];
  for (count = 0; count < max; count++)
    {
      attachment = [allAttachments objectAtIndex: count];
      event = [attachment event];
      if ([[event summary] length] == 0)
        [event setSummary: summary];
      [event setUid: uid];
    }
}

- (void) save: (TALLOC_CTX *) memCtx
{
  // iCalCalendar *vCalendar;
  // NSCalendarDate *now;
  NSString *uid, *nameInContainer;
  // iCalEvent *newEvent;
  // iCalPerson *userPerson;
  SOGoUser *activeUser;
  NSRange rangeOfDot;

  if (isNew)
    {
      uid = [self _uidFromGlobalObjectId: memCtx];
      if (uid)
        {
          /* Hack required because of what's explained in oxocal 3.1.4.7.1:
             basically, Outlook creates a copy of the event and then removes
             the old instance. We perform a trickery to avoid performing those
             operations in the backend, in a way that enables us to recover
             the initial instance and act solely on it. */
          [self _fixupAppointmentObjectWithUID: uid];
        }
      else
        {
          /* We create a UID from the nameInContainer, or the reverse if the
             latter is already set... */
          nameInContainer = [sogoObject nameInContainer];
          if (nameInContainer)
            {
              rangeOfDot = [nameInContainer rangeOfString: @"."
                                                  options: NSBackwardsSearch];
              if (rangeOfDot.location == NSNotFound)
                uid = nameInContainer;
              else
                uid = [nameInContainer substringToIndex: rangeOfDot.location];
            }
          else
            {
              uid = [SOGoObject globallyUniqueObjectId];
              nameInContainer = [NSString stringWithFormat: @"%@.ics", uid];
              [sogoObject setNameInContainer: nameInContainer];
            }
        }
      [masterEvent setUid: uid];
    }

  // [self logWithFormat: @"-save, event props:"];
  // MAPIStoreDumpMessageProperties (newProperties);

  // now = [NSCalendarDate date];

  activeUser = [[self context] activeUser];
  [masterEvent updateFromMAPIProperties: properties
                          inUserContext: [self userContext]
                         withActiveUser: activeUser
	                       inMemCtx: memCtx];
  [self _updateAttachedEvents];
  [[self userContext] activate];
  [sogoObject updateContentWithCalendar: calendar
                            fromRequest: nil];
  [self updateVersions];
}

- (id) lookupAttachment: (NSString *) childKey
{
  return [attachmentParts objectForKey: childKey];
}

- (MAPIStoreAttachment *) createAttachment
{
  MAPIStoreCalendarAttachment *newAttachment;
  uint32_t newAid;
  NSString *newKey;
  iCalEvent *newEvent;

  newAid = [[self attachmentKeys] count];

  newAttachment = [MAPIStoreCalendarAttachment
                    mapiStoreObjectInContainer: self];
  [newAttachment setAID: newAid];
  newEvent = [iCalEvent groupWithTag: @"vevent"];
  [newAttachment setEvent: newEvent];
  [calendar addToEvents: newEvent];

  newKey = [NSString stringWithFormat: @"%ul", newAid];
  [attachmentParts setObject: newAttachment
                      forKey: newKey];
  [attachmentKeys release];
  attachmentKeys = nil;

  return newAttachment;
}

- (enum mapistore_error) setReadFlag: (uint8_t) flag
{
  return MAPISTORE_SUCCESS;
}

@end