//
// Copyright (c) 2015 Google Inc.
//
// Licensed 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 "NewPostViewController.h"
#import "User.h"
#import "Post.h"
@import Firebase;

@interface NewPostViewController () <UITextFieldDelegate>
 @property (weak) IBOutlet UITextView *bodyTextView;
 @property (weak) IBOutlet UITextField *titleTextField;
@end

@implementation NewPostViewController

#pragma mark - UIViewController lifecycle methods
- (void)viewDidLoad {
 [super viewDidLoad];

 // [START create_database_reference]
 self.ref = [[FIRDatabase database] reference];
 // [END create_database_reference]

 UIToolbar *doneBar = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, 320, 44)];
 doneBar.autoresizingMask = UIViewAutoresizingFlexibleWidth;
 UIBarButtonItem *flex = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace
 target:nil
 action:nil];
 UIBarButtonItem *done = [[UIBarButtonItem alloc] initWithTitle:@"Post"
 style:UIBarButtonItemStylePlain
 target:self
 action:@selector(didTapShare:)];
 done.tintColor = [UIColor colorWithRed:1.0 green:143.0/255.0 blue:0.0 alpha:1.0];
 doneBar.items = @[flex, done, flex];
 [doneBar sizeToFit];
 _bodyTextView.inputAccessoryView = doneBar;
 _titleTextField.inputAccessoryView = doneBar;
}

- (IBAction)didTapShare:(id)sender {
 // [START single_value_read]
 NSString *userID = [FIRAuth auth].currentUser.uid;
 [[[_ref child:@"users"] child:userID] observeSingleEventOfType:FIRDataEventTypeValue withBlock:^(FIRDataSnapshot * _Nonnull snapshot) {
 // Get user value
 User *user = [[User alloc] initWithUsername:snapshot.value[@"username"]];

 // [START_EXCLUDE]
 // Write new post
 [self writeNewPost:userID
 username:user.username
 title:self.titleTextField.text
 body:self.bodyTextView.text];
 // Finish this Activity, back to the stream
 [self.navigationController popViewControllerAnimated:YES];
 // [END_EXCLUDE]
 } withCancelBlock:^(NSError * _Nonnull error) {
 NSLog(@"%@", error.localizedDescription);
 }];
 // [END single_value_read]
}

- (void)writeNewPost:(NSString *)userID username:(NSString *)username title:(NSString *)title body:(NSString *)body {
 // Create new post at /user-posts/$userid/$postid and at
 // /posts/$postid simultaneously
 // [START write_fan_out]
 NSString *key = [[_ref child:@"posts"] childByAutoId].key;
 NSDictionary *post = @{@"uid": userID,
 @"author": username,
 @"title": title,
 @"body": body};
 NSDictionary *childUpdates = @{[@"/posts/" stringByAppendingString:key]: post,
 [NSString stringWithFormat:@"/user-posts/%@/%@/", userID, key]: post};
 [_ref updateChildValues:childUpdates];
 // [END write_fan_out]
}

- (BOOL)textFieldShouldReturn:(UITextField *)textField {
 [textField resignFirstResponder];
 return NO;
}

@end