//
//  MasterViewController.m
//  Juick
//
//  Created by Vitaly Takmazov on 26.10.13.
//  Copyright (c) 2013 com.juick. All rights reserved.
//

#import "MasterViewController.h"

#import "MessageCell.h"

#import "Message.h"

static NSString *CellIdentifier = @"MessageCell";

@interface MasterViewController ();

@property(nonatomic, strong) NSMutableArray *messages;
@property(nonatomic, assign) Boolean dataLoading;

@end

@implementation MasterViewController

- (void) refreshData:(UIRefreshControl *)refresh {
    [self.messages removeAllObjects];
    [self.tableView reloadData];
    NSURL *url = [NSURL URLWithString:@"https://api.juick.com/messages"];
    
    NSArray *next = [Message pullNextFromURL:url];
    int64_t delayInSeconds = 2.0;
    dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (delayInSeconds * NSEC_PER_SEC));
    dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
        [self.tableView beginUpdates];
        CGPoint offset = self.tableView.contentOffset;
        for (int i = 0; i < [next count]; i++) {
            [self.messages addObject:[next objectAtIndex:i]];
            [self.tableView insertRowsAtIndexPaths:@[[NSIndexPath indexPathForRow:self.messages.count-1 inSection:0]] withRowAnimation:UITableViewRowAnimationNone];
        }
        [self.tableView setContentOffset:offset animated:NO];
        [self.tableView endUpdates];
        [refresh endRefreshing];
    });
}

- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
    CGPoint pos = scrollView.contentOffset;
    CGFloat contentHeight = scrollView.contentSize.height - scrollView.contentSize.height / 3;
    if (pos.y >= contentHeight && !self.dataLoading) {
        dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^{
            self.dataLoading = YES;
            Message * lastMessage = [self.messages lastObject];
            NSArray *next = [Message pullNextFromURL:[NSURL URLWithString:[NSString stringWithFormat:@"http://api.juick.com/messages?before_mid=%@", lastMessage.MID]]];
            int64_t delayInSeconds = 2.0;
            dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (delayInSeconds * NSEC_PER_SEC));
            dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
                [self.tableView beginUpdates];
                for (int i = 0; i < [next count]; i++) {
                    [self.messages addObject:[next objectAtIndex:i]];
                    [self.tableView insertRowsAtIndexPaths:@[[NSIndexPath indexPathForRow:self.messages.count-1 inSection:0]] withRowAnimation:UITableViewRowAnimationNone];
                }
                [self.tableView setContentOffset:pos animated:NO];
                [self.tableView endUpdates];
                self.dataLoading = NO;
            });
        });
        
    }
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.dataLoading = NO;
    self.title = @"Messages";
    self.messages = [NSMutableArray array];
    UIRefreshControl *refresh = [[UIRefreshControl alloc] init];
    [refresh addTarget:self action:@selector(refreshData:) forControlEvents:UIControlEventValueChanged];
    self.refreshControl = refresh;
    
    //UINib *cellNib = [UINib nibWithNibName:@"MessageCell" bundle:nil];
    //[self.tableView registerNib:cellNib forCellReuseIdentifier:@"MessageCell"];
    [self.tableView registerClass:[MessageCell class] forCellReuseIdentifier:CellIdentifier];    
    
}

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
    
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(contentSizeCategoryChanged:)
                                                 name:UIContentSizeCategoryDidChangeNotification
                                               object:nil];
}

- (void)viewDidDisappear:(BOOL)animated
{
    [super viewDidDisappear:animated];
    
    [[NSNotificationCenter defaultCenter] removeObserver:self
                                                    name:UIContentSizeCategoryDidChangeNotification
                                                  object:nil];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (void)contentSizeCategoryChanged:(NSNotification *)notification
{
    [self.tableView reloadData];
}

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

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return _messages.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    MessageCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
    [cell updateFonts];
    Message *msg = [_messages objectAtIndex:indexPath.row];
    [cell.avatar setImage:[UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:[NSString stringWithFormat:@"http://i.juick.com/as/%@.png", msg.userID]]]]];
    cell.titleLabel.text = msg.user;
    cell.bodyLabel.text =  msg.text;
    [cell setNeedsUpdateConstraints];
    return cell;
}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    
    
    MessageCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    
    [cell updateFonts];
    
    Message *msg = [_messages objectAtIndex:indexPath.row];
    [cell.avatar setImage:[UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:[NSString stringWithFormat:@"http://i.juick.com/as/%@.png", msg.userID]]]]];
    cell.titleLabel.text = msg.user;
    cell.bodyLabel.text =  msg.text;
    
    cell.bodyLabel.preferredMaxLayoutWidth = tableView.bounds.size.width - (kLabelHorizontalInsets * 2.0f);
    
    [cell setNeedsUpdateConstraints];
    [cell updateConstraintsIfNeeded];
    [cell.contentView setNeedsLayout];
    [cell.contentView layoutIfNeeded];
    
    CGFloat height = [cell.contentView systemLayoutSizeFittingSize:UILayoutFittingCompressedSize].height;
    
    return height;
}

- (CGFloat)tableView:(UITableView *)tableView estimatedHeightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return 100.0f;
}


@end