//
//  ObjectVersionsViewController.m
//  pithos-ios
//
// Copyright 2011 GRNET S.A. All rights reserved.
//
// Redistribution and use in source and binary forms, with or
// without modification, are permitted provided that the following
// conditions are met:
// 
//   1. Redistributions of source code must retain the above
//      copyright notice, this list of conditions and the following
//      disclaimer.
// 
//   2. Redistributions in binary form must reproduce the above
//      copyright notice, this list of conditions and the following
//      disclaimer in the documentation and/or other materials
//      provided with the distribution.
// 
// THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
// OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
// USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
// 
// The views and conclusions contained in the software and
// documentation are those of the authors and should not be
// interpreted as representing official policies, either expressed
// or implied, of GRNET S.A.

#import "ObjectVersionsViewController.h"
#import "StorageObjectViewController.h"
#import "OpenStackAccount.h"
#import "OpenStackRequest.h"
#import "AccountManager.h"
#import "APICallback.h"
#import "JSON.h"
#import "ActivityIndicatorView.h"
#import "UIViewController+Conveniences.h"
#import "StorageObject.h"

@implementation ObjectVersionsViewController

@synthesize versions, account, container, object;

#pragma mark - View lifecycle

- (void)viewDidLoad {
    [super viewDidLoad];
    self.navigationItem.title = @"Versions";
    self.versions = [NSMutableArray array];
    versionsLoaded = NO;

    __block ActivityIndicatorView *activityIndicatorView = [ActivityIndicatorView activityIndicatorViewWithText:@"Loading..."
                                                                                                   andAddToView:self.view];
    [[self.account.manager  getObjectVersionsList:container object:object]
     success:^(OpenStackRequest *request) {
         SBJSON *parser = [[SBJSON alloc] init];
         NSArray *versionsInJson = [[parser objectWithString:[request responseString]] objectForKey:@"versions"];
         for (NSArray *versionInfo in versionsInJson) {
             [versions addObject:[NSDictionary dictionaryWithObjectsAndKeys:[versionInfo objectAtIndex:0], @"versionID",
                                 [NSDate dateWithTimeIntervalSince1970:[[versionInfo objectAtIndex:1] doubleValue]], @"versionDate",
                                 nil]]; 
         }
         [parser release];
         [activityIndicatorView removeFromSuperview];
         versionsLoaded = YES;
         [self.tableView reloadData];
     }
     failure:^(OpenStackRequest *request) {
         [activityIndicatorView removeFromSuperview];
         [self alert:@"Couldn't get versions from server." request:request];
     }];    
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation {
    return ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPad) || (toInterfaceOrientation == UIInterfaceOrientationPortrait);
}

#pragma mark - Memory management

- (void)dealloc {
    [account release];
    [container release];
    [object release];
    [versions release];
    [super dealloc];
}

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    if (!versionsLoaded)
        return 0;
    else
        return MAX(1, versions.count);
}

- (UITableViewCell *)tableView:(UITableView *)aTableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *CellIdentifier = @"Cell";
    
    UITableViewCell *cell = [aTableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease];
    }
    cell.userInteractionEnabled = YES;
    cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
    cell.selectionStyle = UITableViewCellSelectionStyleBlue;
    if (versions.count == 0 || !versions) {
        cell.textLabel.text = @"No previous versions available";
        cell.userInteractionEnabled = NO;
        cell.accessoryType = UITableViewCellAccessoryNone;
        cell.selectionStyle = UITableViewCellSelectionStyleNone;
    } else {
        NSDictionary *versionDetails = [versions objectAtIndex:indexPath.row];
        cell.textLabel.text = [[versionDetails objectForKey:@"versionID"] description];
        NSString *dateString = [NSDateFormatter localizedStringFromDate:[versionDetails objectForKey:@"versionDate"]
                                                              dateStyle:NSDateFormatterMediumStyle
                                                              timeStyle:NSDateFormatterMediumStyle];
        cell.detailTextLabel.text = dateString;
    }
    
    return cell;
}

#pragma mark - Table view delegate

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    __block ActivityIndicatorView *activityIndicatorView = [ActivityIndicatorView activityIndicatorViewWithText:@"Loading..."
                                                                                                   andAddToView:self.view];
    NSDictionary *versionDetails = [versions objectAtIndex:indexPath.row];
    NSString *versionID = [[versionDetails objectForKey:@"versionID"] description];
    [[self.account.manager getObjectInfo:container object:object version:versionID]
     success:^(OpenStackRequest *request) {
         [activityIndicatorView removeFromSuperview];
         StorageObject *versionedObject = [[[StorageObject alloc] init] autorelease];
         versionedObject.name = object.name;
         versionedObject.fullPath = object.fullPath;
         [versionedObject setPropertiesfromResponseHeaders:request.responseHeaders];
         StorageObjectViewController *vc = [[StorageObjectViewController alloc] initWithNibName:@"StorageObjectViewController" bundle:nil];
         vc.objectIsReadOnly = YES;
         vc.account = account;
         vc.container = container;
         vc.object = versionedObject;
         vc.versionID = versionID;
         [self.navigationController pushViewController:vc animated:YES];
         [vc release];
         [self.tableView deselectRowAtIndexPath:indexPath animated:YES];
     } 
     failure:^(OpenStackRequest *request) {
         [activityIndicatorView removeFromSuperview];
         [self alert:[NSString stringWithFormat:@"Failed to get file info for version: %@", versionID] request:request];
     }];
}

@end