/*

    Copyright (C) 2015 Apple Inc. All Rights Reserved.

    See LICENSE.txt for this sample’s licensing information

    Abstract:

    This view controller displays all reminders whose due date was within the last 7 days.

            It shows the title, due date, frequency, and priority of each reminder using EKReminder's title, dueDateComponents, and priority properties

            and EKRecurrenceRule, respectively. It also allows you to mark a reminder as completed.

 */

#import "CustomCell.h"

#import "EKRSConstants.h"

#import "EKRSHelperClass.h"

#import "PastDueReminders.h"

#import "TimedReminderStore.h"

#import "EKRSReminderStoreUtilities.h"

// Cell identifier

static NSString *EKTRPastDueRemindersCellID = @"pastDueCellID";

@interface PastDueReminders ()

// Keep track of all past-due reminders

@property (nonatomic, strong) NSMutableArray *pastDue;

@end

@implementation PastDueReminders

-(id)initWithCoder:(NSCoder *)aDecoder

{

    self = [super initWithCoder:aDecoder];

    if (self)

    {

        // Register for TimedTabBarController notification

        [[NSNotificationCenter defaultCenter] addObserver:self

                                                 selector:@selector(handleTTBPastDueRemindersNotification:)

                                                     name:TTBPastDueRemindersNotification

                                                   object:nil];

        _pastDue = [[NSMutableArray alloc] initWithCapacity:0];

    }

    return self;

}

#pragma mark - Handle TimedTabBarController Notification

// Update the UI

-(void)handleTTBPastDueRemindersNotification:(NSNotification *)notification

{

    self.pastDue = [TimedReminderStore sharedInstance].pastDueReminders;

    [self.tableView reloadData];

}

#pragma mark - UITableViewDataSource

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

{

    // Return the number of rows in the section.

    return self.pastDue.count;

}

- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath

{

    EKReminder *reminder = (self.pastDue)[indexPath.row];

    NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];

    // Fetch the date by which this reminder should be completed

    NSDate *date = [gregorian dateFromComponents:reminder.dueDateComponents];

    NSString *formattedDateString = [[EKRSHelperClass dateFormatter] stringFromDate:date];

    // Fetch the recurrence rule

    NSArray *recurrence = reminder.recurrenceRules;

    EKRecurrenceRule *rule = recurrence.firstObject;

    // Create a string comprising of the date and frequency

    NSString *dateAndFrequency = (recurrence.count > 0) ? [NSString stringWithFormat:@"%@, %@",formattedDateString,[rule nameMatchingFrequency:rule.frequency]] : [NSString stringWithFormat:@"%@",formattedDateString];

    CustomCell *myCell = (CustomCell *)cell;

    myCell.checkBox.checked = NO;

    myCell.title.text = reminder.title;

    myCell.dateAndFrequency.text = dateAndFrequency;

    myCell.priority.text = [reminder symbolMatchingPriority:reminder.priority];

}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

{

    return [tableView dequeueReusableCellWithIdentifier:EKTRPastDueRemindersCellID];

}

#pragma mark - UITableViewDelegate

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath

{

    // Find the cell being touched

    CustomCell *targetCustomCell = (CustomCell *)[tableView cellForRowAtIndexPath:indexPath];

    // Add a checkmark for this reminder

    targetCustomCell.checkBox.checked = !targetCustomCell.checkBox.checked;

    // Let's mark the selected reminder as completed

    [self completeReminderIndexPath:indexPath];

}

#pragma mark - Managing Selections

- (IBAction)checkBoxTapped:(id)sender forEvent:(UIEvent *)event

{

    NSSet *touches = [event allTouches];

    UITouch *touch = [touches anyObject];

    CGPoint currentTouchPosition = [touch locationInView:self.tableView];

    // Lookup the index path of the cell whose checkbox was modified.

    NSIndexPath *indexPath = [self.tableView indexPathForRowAtPoint:currentTouchPosition];

    if (indexPath != nil)

    {

        // Let's mark the selected reminder as completed

        [self completeReminderIndexPath:indexPath];

    }

}

// Call TimedReminderStore to mark the selected reminder as completed

-(void)completeReminderIndexPath:(NSIndexPath *)indexPath

{

    EKReminder *reminder = (self.pastDue)[indexPath.row];

    // Remove the selected reminder from the UI

    [self.pastDue removeObject:reminder];

    [self.tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];

    // Tell TimedReminderStore to mark the selected reminder as completed

    [[TimedReminderStore sharedInstance] complete:reminder];

}

#pragma mark - Memory Management

- (void)didReceiveMemoryWarning

{

    [super didReceiveMemoryWarning];

}

- (void)dealloc

{

    // Unregister for TimedTabBarController notification

    [[NSNotificationCenter defaultCenter] removeObserver:self

                                                    name:TTBPastDueRemindersNotification

                                                  object:nil];

}

@end