/*

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

See LICENSE.txt for this sample’s licensing information

Abstract:

Application delegate that sets up the application.

*/

#import "TheElementsAppDelegate.h"

#import "ElementsTableViewController.h"

// each data source responsible for backing our 4 varying table view controllers

#import "ElementsSortedByNameDataSource.h"

#import "ElementsSortedByAtomicNumberDataSource.h"

#import "ElementsSortedBySymbolDataSource.h"

#import "ElementsSortedByStateDataSource.h"

@implementation TheElementsAppDelegate

@synthesize window;

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    // for each tableview 'screen' we need to create a datasource instance

    // (the class that is passed in) we then need to create an instance of

    // ElementsTableViewController with that datasource instance finally we need to return

    // a UINaviationController for each screen, with the ElementsTableViewController as the

    // root view controller.

    //

    UITabBarController *tabBarController = (UITabBarController *)self.window.rootViewController;

    // the class type for the datasource is not crucial, but that it implements the

    // ElementsDataSource protocol and the UITableViewDataSource Protocol

    //

    id<ElementsDataSource, UITableViewDataSource> dataSource;

    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];

    NSMutableArray *viewControllers = [NSMutableArray arrayWithCapacity:4];

    // create our tabbar view controllers, since we already have one defined in our storyboard

    // we will create 3 more instances of it, and assign each it's own kind data source

    // by name

    UINavigationController *navController = [storyboard instantiateViewControllerWithIdentifier:@"navForTableView"];

    ElementsTableViewController *viewController =

        (ElementsTableViewController *)[navController topViewController];

    dataSource = [[ElementsSortedByNameDataSource alloc] init];

    viewController.dataSource = dataSource;

    [viewControllers addObject:navController];

    // by atomic number

    navController = [storyboard instantiateViewControllerWithIdentifier:@"navForTableView"];

    viewController = (ElementsTableViewController *)[navController topViewController];

    dataSource = [[ElementsSortedByAtomicNumberDataSource alloc] init];

    viewController.dataSource = dataSource;

    [viewControllers addObject:navController];

    // by symbol

    navController = [storyboard instantiateViewControllerWithIdentifier:@"navForTableView"];

    viewController = (ElementsTableViewController *)[navController topViewController];

    dataSource = [[ElementsSortedBySymbolDataSource alloc] init];

    viewController.dataSource = dataSource;

    [viewControllers addObject:navController];

    // by state

    navController = [storyboard instantiateViewControllerWithIdentifier:@"navForTableView"];

    viewController = (ElementsTableViewController *)[navController topViewController];

    dataSource = [[ElementsSortedByStateDataSource alloc] init];

    viewController.dataSource = dataSource;

    [viewControllers addObject:navController];

    tabBarController.viewControllers = viewControllers;

    return YES;

}

@end