//
//  ButtonsViewController.m
//  FSCalendar
//
//  Created by dingwenchao on 4/15/16.
//  Copyright © 2016 Wenchao Ding. All rights reserved.
//

#import "ButtonsViewController.h"
#import "FSCalendar.h"

@interface ButtonsViewController()<FSCalendarDataSource,FSCalendarDelegate>

@property (weak, nonatomic) FSCalendar *calendar;
@property (weak, nonatomic) UIButton *previousButton;
@property (weak, nonatomic) UIButton *nextButton;

@property (strong, nonatomic) NSCalendar *gregorian;

- (void)previousClicked:(id)sender;
- (void)nextClicked:(id)sender;

@end

@implementation ButtonsViewController

- (instancetype)init
{
    self = [super init];
    if (self) {
        self.title = @"FSCalendar";
        self.gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
    }
    return self;
}

- (void)loadView
{
    UIView *view = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    view.backgroundColor = [UIColor groupTableViewBackgroundColor];
    self.view = view;
    
    // 450 for iPad and 300 for iPhone
    CGFloat height = [[UIDevice currentDevice].model hasPrefix:@"iPad"] ? 450 : 300;
    FSCalendar *calendar = [[FSCalendar alloc] initWithFrame:CGRectMake(0, 64, view.frame.size.width, height)];
    calendar.dataSource = self;
    calendar.delegate = self;
    calendar.backgroundColor = [UIColor whiteColor];
    calendar.appearance.headerMinimumDissolvedAlpha = 0;
    calendar.appearance.caseOptions = FSCalendarCaseOptionsHeaderUsesUpperCase;
    [self.view addSubview:calendar];
    self.calendar = calendar;
    
    UIButton *previousButton = [UIButton buttonWithType:UIButtonTypeCustom];
    previousButton.frame = CGRectMake(0, 64+5, 95, 34);
    previousButton.backgroundColor = [UIColor whiteColor];
    previousButton.titleLabel.font = [UIFont systemFontOfSize:15];
    [previousButton setImage:[UIImage imageNamed:@"icon_prev"] forState:UIControlStateNormal];
    [previousButton addTarget:self action:@selector(previousClicked:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:previousButton];
    self.previousButton = previousButton;
    
    UIButton *nextButton = [UIButton buttonWithType:UIButtonTypeCustom];
    nextButton.frame = CGRectMake(CGRectGetWidth(self.view.frame)-95, 64+5, 95, 34);
    nextButton.backgroundColor = [UIColor whiteColor];
    nextButton.titleLabel.font = [UIFont systemFontOfSize:15];
    [nextButton setImage:[UIImage imageNamed:@"icon_next"] forState:UIControlStateNormal];
    [nextButton addTarget:self action:@selector(nextClicked:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:nextButton];
    self.nextButton = nextButton;
    
}

- (void)previousClicked:(id)sender
{
    NSDate *currentMonth = self.calendar.currentPage;
    NSDate *previousMonth = [self.gregorian dateByAddingUnit:NSCalendarUnitMonth value:-1 toDate:currentMonth options:0];
    [self.calendar setCurrentPage:previousMonth animated:YES];
}

- (void)nextClicked:(id)sender
{
    NSDate *currentMonth = self.calendar.currentPage;
    NSDate *nextMonth = [self.gregorian dateByAddingUnit:NSCalendarUnitMonth value:1 toDate:currentMonth options:0];
    [self.calendar setCurrentPage:nextMonth animated:YES];
}


@end