/*

 Copyright (C) 2016 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 Object to represent a region containing the corresponding time zone wrappers.

 */

#import "APLRegion.h"

#import "APLTimeZoneWrapper.h"

static NSMutableDictionary *regions;

@interface APLRegion ()

@property (nonatomic) NSMutableArray *mutableTimeZoneWrappers;

@end

@implementation APLRegion

/*

 Class methods to manage global regions (pun intended).

 */

+ (void)initialize {

    regions = [[NSMutableDictionary alloc] init];   

}

+ (instancetype)regionNamed:(NSString *)name {

    return regions[name];

}

+ (instancetype)newRegionWithName:(NSString *)regionName {

    // Create a new region with a given name; add it to the regions dictionary.

    APLRegion *newRegion = [[self alloc] init];

    newRegion.name = regionName;

    newRegion.mutableTimeZoneWrappers = [[NSMutableArray alloc] init];

    regions[regionName] = newRegion;

    return newRegion;

}

-(NSArray *)timeZoneWrappers {

    return _mutableTimeZoneWrappers;

}

- (void)addTimeZone:(NSTimeZone *)timeZone nameComponents:(NSArray *)nameComponents {

    // Add a time zone to the region; use nameComponents because it' expensive to compute.

    APLTimeZoneWrapper *timeZoneWrapper = [[APLTimeZoneWrapper alloc] initWithTimeZone:timeZone nameComponents:nameComponents];

    timeZoneWrapper.calendar = self.calendar;

    [self.mutableTimeZoneWrappers addObject:timeZoneWrapper];

}

- (void)sortZones {

    // Sort the zone wrappers by locale name.

    NSSortDescriptor *nameSortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"timeZoneLocaleName" ascending:YES comparator:^(id name1, id name2) {

        return [(NSString *)name1 localizedStandardCompare:(NSString *)name2];

    }];

    [self.mutableTimeZoneWrappers sortUsingDescriptors:@[nameSortDescriptor]];

}

// Sets the date for the time zones, which has the side-effect of "faulting" the wrappers (see APLTimeZoneWrapper's setDate: method)

- (void)setDate:(NSDate *)date {

    for (APLTimeZoneWrapper *wrapper in self.timeZoneWrappers) {

        wrapper.date = date;

    }

}

@end