//
//  ViewController.m
//  ChangeStyleOfText
//
//  Created by Nguyen Viet Tien on 9/22/14.
//  Copyright (c) 2014 com.distance. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
	// Do any additional setup after loading the view, typically from a nib.

    //Set text attributed with function changeStyleOfSentence
    [_lblText setAttributedText:[self changeStyleOfSentence:@"A chocolate chip <-cookie-> is a cookie with <-pieces of-> chocolate."]];
}

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

-(NSMutableAttributedString* )changeStyleOfSentence:(NSString* )sentence{

    NSString * stringInput = sentence;

    NSError *error = NULL;

    NSRegularExpression *regexOne = [NSRegularExpression regularExpressionWithPattern:@"(<-).*?(->)"
                                                                              options:0 error:&error];

    NSRegularExpression *regexTwo = [NSRegularExpression regularExpressionWithPattern:@"(?<=<-).*?(?=->)"
                                                                              options:0 error:&error];
    NSMutableAttributedString *stringBold;
    NSString *result;

    if (regexTwo) {
        NSRange rangeOfTwoMatch = [regexTwo rangeOfFirstMatchInString:stringInput options:0 range:NSMakeRange(0, [stringInput length])];
        if (!NSEqualRanges(rangeOfTwoMatch, NSMakeRange(NSNotFound, 0))) {
            result = [stringInput substringWithRange:rangeOfTwoMatch];

            //[resultTwo addObject:[stringInput substringWithRange:rangeOfTwoMatch]];
        }
        //Output : result = cookie
        NSLog(@"Style--- Result1: %@",result);
    }

    NSRange rangeOfFirstMatch;
    NSString* result2;

    if (regexOne) {
        rangeOfFirstMatch = [regexOne rangeOfFirstMatchInString:stringInput options:0 range:NSMakeRange(0, [stringInput length])];
        if (!NSEqualRanges(rangeOfFirstMatch, NSMakeRange(NSNotFound, 0))) {
            result2 = [stringInput substringWithRange:rangeOfFirstMatch];

            //[resultOne addObject:[stringInput substringWithRange:rangeOfFirstMatch]];
        }
        //Output : result2 = <-cookie->
        NSLog(@"Style--- Result2: %@",result2);
    }

    //Bold the word <-cookie->

    stringBold = [[NSMutableAttributedString alloc] initWithString:stringInput];

    UIFontDescriptor* fontDescriptor = [UIFontDescriptor
                                        preferredFontDescriptorWithTextStyle:UIFontTextStyleBody];
    UIFontDescriptor* boldFontDescriptor = [fontDescriptor
                                            fontDescriptorWithSymbolicTraits:UIFontDescriptorTraitBold];
    [stringBold beginEditing];
    [stringBold addAttribute:NSFontAttributeName
                       value:[UIFont fontWithDescriptor:boldFontDescriptor size: 0.0]
                       range:rangeOfFirstMatch];
    [stringBold endEditing];


    //Create a bold word "cookie"
    NSMutableAttributedString *stringSelectedBold = [[NSMutableAttributedString alloc] initWithString:result];

    [stringSelectedBold beginEditing];
    [stringSelectedBold addAttribute:NSFontAttributeName
                               value:[UIFont fontWithDescriptor:boldFontDescriptor size: 0.0]
                               range:NSMakeRange(0, [result length])];
    [stringSelectedBold endEditing];


    //Replace bold word "<-cookie->" by bold word "cookie"
    [stringBold replaceCharactersInRange:rangeOfFirstMatch withAttributedString:stringSelectedBold];


    return stringBold;

}


@end