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//
//  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 "Message.h"

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


#import "NSURL+PathParameters.h"

NSString* const messageCellIdentifier = @"messageCell";

@implementation MessagesViewController

- (void)viewWillAppear:(BOOL)animated {
    self.navigationController.visibleViewController.title = self.title;
    [self refreshData];
}

-(void) refreshData {
    if ([self.path length] > 0) {
        self.dataLoading = YES;
        if (self.messages.count == 0) {
            [self.tableView reloadData];
        }
        [[AppDelegate shared].api pullNextFromPath:self.path params:self.params callback:^(NSArray *next, NSError *err) {
            if (err) {
                [User throwUnableToLogin:self error:err path:self.path params:self.params];
                return;
            }
            NSArray *newMsgs = next;
            if ([self isAtTop:self.params]) {
                if (![self.path isEqualToString:[API threadUrl]]) {
                    [self.messages removeAllObjects];
                    [self.tableView reloadData];
                }
            }
            NSUInteger oldCount = [self.messages count];
            if ([self.path isEqualToString:[API threadUrl]]) {
                NSUInteger lastRid = [((Message *)[self.messages lastObject]).rid unsignedIntegerValue] + 1;
                NSUInteger count = [next count];
                if (oldCount > 0) {
                    if (lastRid && lastRid < count) {
                        newMsgs = [next subarrayWithRange:NSMakeRange(lastRid, count - lastRid)];
                    } else {
                        [self.refreshControl endRefreshing];
                        return;
                    }
                }
            }
            self.dataLoading = NO;
            if (self.messages.count == 0) {
                [self.tableView reloadData];
            }
            [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:NO];
            [self.tableView endUpdates];
            [self.refreshControl endRefreshing];
            if (self.shouldScrollToUnreadOnRefresh) {
                NSInteger messagesCount = [self.messages count];
                if (messagesCount > 0) {
                    NSInteger itemToScroll = [self.firstUnread integerValue] ? : self.messages.count - 1;
                    NSIndexPath *lastRow = [NSIndexPath indexPathForRow:MIN(itemToScroll, messagesCount - 1) inSection:0];
                    [self.tableView scrollToRowAtIndexPath:lastRow atScrollPosition:UITableViewScrollPositionBottom animated:NO];
                }
                self.firstUnread = nil;
            }
        }];
    }
}

-(BOOL) isAtTop:(NSDictionary *)params {
    return [params objectForKey:@"before_mid"] == nil && [params objectForKey:@"to"] == nil;
}

- (UIStatusBarStyle)preferredStatusBarStyle
{
    return UIStatusBarStyleLightContent;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.dataLoading = YES;
    [self.view setBackgroundColor:[UIColor colorNamed:@"Background"]];
    [self.tableView registerNib:[UINib nibWithNibName:@"MessageCell" bundle:[NSBundle mainBundle]] forCellReuseIdentifier:messageCellIdentifier];
    [self.tableView registerNib:[UINib nibWithNibName:@"ContentLoadingCell" bundle:[NSBundle mainBundle]] forCellReuseIdentifier:@"contentLoadingCell"];
    self.tableView.rowHeight = UITableViewAutomaticDimension;
    self.tableView.estimatedRowHeight = 500.0f;
    if (!self.messages) {
        self.messages = [NSMutableArray array];
    }
    self.refreshControl = [UIRefreshControl new];
    [self.refreshControl addTarget:self action:@selector(refreshData) forControlEvents:UIControlEventValueChanged];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(newMessage:) name:NewMessageNotificationName object:nil];
}

- (void) composePressed {
    
}

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

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return self.dataLoading && self.messages.count == 0 ? 4 : self.messages.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    if (self.dataLoading && self.messages.count == 0) {
        return [tableView dequeueReusableCellWithIdentifier:@"contentLoadingCell"];
    } else {
        Message *msg = [self.messages objectAtIndex:indexPath.row];
        MessageCell *cell = [tableView dequeueReusableCellWithIdentifier:messageCellIdentifier forIndexPath:indexPath];
        [cell configureWithMessage:msg selectable:self.shouldAllowToSelectText];
        return cell;
    }
}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
    return self.dataLoading && self.messages.count == 0 ? 200.0f : [super tableView:tableView heightForRowAtIndexPath:indexPath];
}

-(void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    Message *msg = [self.messages objectAtIndex:indexPath.row];
    [self viewThreadForMessage:msg mid:msg.mid scrollTo:0];
    [self.tableView deselectRowAtIndexPath:indexPath animated:YES];
}

-(void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    /*
    if ([segue.identifier isEqual: @"profileSegue"]) {
        BlogViewController *blogVC = (BlogViewController *)segue.destinationViewController;
        [blogVC setUname:self.selectedUser];
        [blogVC setTitle:self.selectedUser];
        blogVC.path = [NSString stringWithFormat:@"/messages?uname=%@", self.selectedUser];
        [blogVC setShouldScrollToBottomOnRefresh: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]) {
        [_messagesDelegate loadMore];
    }
}

-(void) viewThreadForMessage:(Message *)msg mid:(NSNumber *)mid scrollTo:(NSNumber *)rid {
    [[AppDelegate shared] presentThread:self];
}

-(void) newMessage:(NSNotification *)obj {
    Message *msg = (Message *)[obj object];
    [self viewThreadForMessage:msg mid:msg.mid scrollTo:0];
}

@end