/*

     File: APLProfileTableViewController.m

 Abstract: View controller to handle listing all instances of the custom APLProfile class.

  Version: 1.0

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 */

#import "APLAppDelegate.h"

#import "APLProfileTableViewController.h"

#import "APLProfileViewController.h"

#import "APLProfile.h"

#import "APLUtilities.h"

NSString * const kProfileTableViewCellIdentifier = @"Cell";

NSString * const kTemplateImageName = @"Image_Template.png";

NSString * const kSampleProfileImageName = @"Zebra.png";

NSString * const kProfileDetailSegueIdentifier = @"ProfileDetailSegue";

@interface APLProfileTableViewController ()

@property (strong, nonatomic) IBOutlet UITableView *tableView;

@property (strong, nonatomic) NSMutableArray *tableContents;    //Stores the profiles

@property (strong, nonatomic) UIBarButtonItem *editButton;

@property (strong, nonatomic) UIBarButtonItem *addButton;

@property (strong, nonatomic) UIBarButtonItem *doneButton;

@end

@implementation APLProfileTableViewController

- (void)viewDidLoad

{

    [super viewDidLoad];

    self.title = @"Profiles";

    //Set up buttons to allow editing of tableview rows.

    self.addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(addProfile:)];

    self.doneButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(editTable:)];

    self.editButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemEdit target:self action:@selector(editTable:)];

    [self.navigationItem setRightBarButtonItem:self.editButton];

    //Set up sample profile.

    UIImage *image = [UIImage imageNamed:kSampleProfileImageName];

    APLProfile *profile = [[APLProfile alloc] initWithName:@"Zebra" image:image];

    //Initialize tableContents array with the sample profile and any profiles stored by the app.

    self.tableContents = [[NSMutableArray alloc] initWithArray:@[profile]];

    [self.tableContents addObjectsFromArray:[APLUtilities loadProfiles]];

    //Register to be notified when new profiles are received.

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(profilesSaved:) name:SavedReceivedProfilesNotification object:nil];

}

- (void)dealloc

{

    [[NSNotificationCenter defaultCenter] removeObserver:self name:SavedReceivedProfilesNotification object:nil];

}

#pragma mark - UITableViewDataSource and UITableViewDelegate

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

{

    //Return the number of profiles stored.

    return [self.tableContents count];

}

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

{

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:kProfileTableViewCellIdentifier forIndexPath:indexPath];

    cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;

    NSInteger row = [indexPath row];

    if (row >= 0 && row < [self.tableContents count]){

        //Cell shows the profile image and name.

        cell.imageView.image = [(APLProfile *)self.tableContents[row] thumbnailImage];

        cell.textLabel.text = [(APLProfile *)self.tableContents[row] name];

    }

    else {

        NSLog(@"ERROR: indexPath out of range");

    }

    return cell;

}

- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath

{

    if (indexPath.row > 0) { //Do not let the sample profile (index 0) be deleted.

        return YES;

    }

    return NO;

}

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath

{

    if (editingStyle == UITableViewCellEditingStyleDelete) {

        if (indexPath.row > 0 && indexPath.row < self.tableContents.count) {

            APLProfile *profile = [self.tableContents objectAtIndex:indexPath.row];

            [self.tableContents removeObjectAtIndex:indexPath.row];

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

            //Delete the persisted profile file.

            [APLUtilities deleteProfile:profile];

        }

    }

}

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender

{

    NSString *identifier = [segue identifier];

    if ([identifier isEqualToString:kProfileDetailSegueIdentifier]) {

        NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];

        APLProfileViewController *profileViewController = [segue destinationViewController];

        profileViewController.profile = (APLProfile *)[self.tableContents objectAtIndex:indexPath.row];

        //The tableview will monitor when the profile updates.

        profileViewController.delegate = self;

        //The profiles should be editable/sharable.

        profileViewController.interactive = YES;

    }

}

#pragma mark - Actions

- (void)editTable:(id)sender

{

    //Update navigation items when editing buttons (Edit or Done) are pressed.

    if (self.tableView.isEditing) {

        [self.tableView setEditing:NO animated:YES];

        [self.navigationItem setRightBarButtonItem:self.editButton];

        [self.navigationItem setLeftBarButtonItem:nil];

    }

    else

    {

        [self.tableView setEditing:YES animated:YES];

        [self.navigationItem setRightBarButtonItem:self.doneButton];

        [self.navigationItem setLeftBarButtonItem:self.addButton];

    }

}

- (void)addProfile:(id)sender

{

    //Create a template profile.

    UIImage *image = [UIImage imageNamed:kSampleProfileImageName];

    APLProfile *profile = [[APLProfile alloc] initWithName:@"Zebra" image:image];

    //Manually load the view controller.

    UIStoryboard *sb = [UIStoryboard storyboardWithName:kMainStoryboardName bundle:nil];

    APLProfileViewController *profileViewController = [sb instantiateViewControllerWithIdentifier:kProfileViewControllerIdentifier];

    //Set up view controller to be editable and delagate to this table view controller.

    profileViewController.delegate = self;

    profileViewController.profile = profile;

    profileViewController.interactive = YES;

    //Push the new view controller onto the stack.

    [self.navigationController pushViewController:profileViewController animated:YES];

    //Turn off table view editing.

    if (self.tableView.isEditing) {

        [self editTable:self];

    }

    //Add the profile to the table.

    [self.tableContents addObject:profile];

    [self.tableView reloadData];

    //Save new profile to persistent file.

    [APLUtilities saveProfile:profile];

}

- (void)profilesSaved:(NSNotification *)notification

{

    NSArray *filenames = [[notification userInfo] objectForKey:kSavedReceivedProfilesFileNamesKey];

    for (NSString *filename in filenames) {

        APLProfile *profile = [APLUtilities loadProfileForFilename:filename];

        if (profile) {

            [self.tableContents addObject:profile];

        }

    }

    [self.tableView reloadData];

}

#pragma mark - ProfileViewControllerDelgate

- (void)profileViewController:(APLProfileViewController *)profileViewController profileDidChange:(APLProfile *)profile

{

    [APLUtilities saveProfile:profile];

    [self.tableView reloadData];

}

@end