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

#import "MessagesViewController.h"
#import "MessageCell.h"

#import "APIClient.h"
#import "Message.h"
#import "ColorScheme.h"

#import "NewPostViewController.h"
#import "LoginViewController.h"
#import "ThreadViewController.h"


#import "NSURL+PathParameters.h"


@interface MessagesViewController ()

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

@implementation MessagesViewController

- (void) refreshData {
    self.dataLoading = YES;
    [[APIClient sharedClient] pullNextFromPath:self.path params:self.params callback:^(NSArray *next, NSError *err) {
        NSArray *newMsgs = next;
        NSUInteger oldCount = [self.messages count];
        if ([self.path isEqualToString:[APIClient threadUrl]]) {
            NSUInteger lastRid = [((Message *)[self.messages lastObject]).rid unsignedIntegerValue];
            NSUInteger count = [next count] - 1;
            if (oldCount > 0) {
                if (lastRid && lastRid < count) {
                    newMsgs = [next subarrayWithRange:NSMakeRange(lastRid, count - lastRid)];
                } else {
                    return;
                }
            }
        }
        [self.messages addObjectsFromArray:newMsgs];
        NSMutableArray *indexPaths = [NSMutableArray new];
        for (NSUInteger index = oldCount; index <= oldCount + [newMsgs count] - 1; index++) {
            [indexPaths addObject:[NSIndexPath indexPathForRow:index inSection: 0]];
        }
        [self.tableView beginUpdates];
        [self.tableView insertRowsAtIndexPaths:indexPaths withRowAnimation:YES];
        [self.tableView endUpdates];
        [self.refreshControl endRefreshing];
        self.dataLoading = NO;
    }];
}

- (UIStatusBarStyle)preferredStatusBarStyle
{
    return UIStatusBarStyleLightContent;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    self.dataLoading = NO;
    [self.view setBackgroundColor:[ColorScheme mainBackground]];
    self.tableView.rowHeight = UITableViewAutomaticDimension;
    self.tableView.estimatedRowHeight = 500.0f;
    self.messages = [NSMutableArray array];
    self.params = [NSMutableDictionary new];
    self.refreshControl = [UIRefreshControl new];
    [self.refreshControl addTarget:self action:@selector(refreshData) forControlEvents:UIControlEventValueChanged];
    if ([User isAuthenticated]) {
        [User checkIsValid:^(BOOL success) {
            if (success) {
                self.path = [APIClient feedUrl];
                [self refreshData];
            } else {
                [User throwUnableToLogin:self];
            }
        }];
        
    } else {
        self.path = [APIClient messagesUrl];
        [self refreshData];
    }
}

- (void) composePressed {
    
}

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

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

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    Message *msg = [self.messages objectAtIndex:indexPath.row];
    NSString * cellIdentifier = @"messageCell";
    MessageCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier forIndexPath:indexPath];
    [cell configureWithMessage:msg];
    return cell;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    if ([self.path isEqualToString:[APIClient threadUrl]])
        return;
    Message *msg = [self.messages objectAtIndex:indexPath.row];
    ThreadViewController *threadViewController = [[ThreadViewController alloc] init];
    [threadViewController setPath:[APIClient threadUrl]];
    [threadViewController setParams:[NSMutableDictionary dictionaryWithObjectsAndKeys:msg.mid, @"mid", nil]];
    [self.navigationController pushViewController:threadViewController animated:NO];
}

-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView_ {
    CGFloat actualPosition = scrollView_.contentOffset.y;
    CGFloat contentHeight = scrollView_.contentSize.height - scrollView_.contentSize.height / 2;
    if (actualPosition >= contentHeight && !self.dataLoading && ![self.tableView isTracking]) {
        Message *lastMsg = [self.messages lastObject];
        if (lastMsg != nil) {
            NSNumber *lastMid = lastMsg.mid;
            if (![self.path isEqualToString:[APIClient threadUrl]]) {
                [self.params setObject:lastMid forKey:@"before_mid"];
            }
            [self refreshData];
        }
    }
}

@end