//
//  MenuTableViewController.m
//  DUREX Vendor Control
//
//  Created by Imanol Barba on 5/23/14.
//  Copyright (c) 2014 Emmoco. All rights reserved.
//

#import "MenuTableViewController.h"

@interface MenuTableViewController ()
{
    IBOutlet UIActivityIndicatorView *_activityIndicator;
    NSTimer *_writeTimer;
}
@property (nonatomic,strong) const NSArray *menuElements;
@property (nonatomic,strong) const NSArray *menuStructure;
@property (nonatomic,strong) const NSArray *menuHeaders;

@property (nonatomic,strong) const NSArray *maintenanceElements;
@property (nonatomic,strong) const NSArray *maintenanceStructure;
@property (nonatomic,strong) const NSArray *maintenanceHeaders;

@property (nonatomic,strong) const NSArray *cellIdentifiers;

@property (nonatomic,strong) CommunicationProtocol* protocol;
@property uint8_t currentNavLevel;
@property NSString *currentCellIdentifier;
@property const NSArray *currentElements;
@property const NSArray  *currentStructure;
@property const NSArray *currentHeaders;

@end

@implementation MenuTableViewController

- (id)initWithStyle:(UITableViewStyle)style
{
    self = [super initWithStyle:style];
    if (self)
    {
        // Custom initialization
    }
    return self;
}

- (void) initializeMenuEntries
{
    [self setMenuElements:[[NSArray alloc] initWithObjects:MENU_ELEMENTS, nil]];
    [self setMenuStructure:[[NSArray alloc] initWithObjects:MENU_CELLS_PER_SECTION, nil]];
    if([[self menuStructure] count] > 1)
    {
        [self setMenuHeaders:[[NSArray alloc] initWithObjects:MENU_HEADERS, nil]];
    }
    else
    {
        [self setMenuHeaders:nil];
    }
    
    [self setMaintenanceElements:[[NSArray alloc] initWithObjects:MAINTENANCE_ELEMENTS, nil]];
    [self setMaintenanceStructure:[[NSArray alloc] initWithObjects:MAINTENANCE_CELLS_PER_SECTION, nil]];
    if([[self maintenanceStructure] count] > 1)
    {
        [self setMaintenanceHeaders:[[NSArray alloc] initWithObjects:MAINTENANCE_HEADERS, nil]];
    }
    else
    {
        [self setMaintenanceHeaders:nil];
    }
    
    [self setCellIdentifiers:[[NSArray alloc] initWithObjects:CELL_IDENTIFIERS, nil]];
}

- (void) changeNavLevel: (uint8_t) level : (BOOL) push
{
    NSLog(@"[MenuTableViewController.m]: navLevel is %d",level);
    if(push)
    {
        [[self parentLayout] push: [NSNumber numberWithUnsignedChar:self.currentNavLevel]];
    }
    [self setCurrentNavLevel:level];
    [self setCurrentCellIdentifier:[[self cellIdentifiers] objectAtIndex:[self currentNavLevel]]];
    if([self currentNavLevel] == MENU)
    {
        [[self navigationItem] setTitle:[[[EMConnectionManager sharedManager] connectedDevice] name]];
        [self setCurrentElements:[self menuElements]];
        [self setCurrentStructure:[self menuStructure]];
        [self setCurrentHeaders:[self menuHeaders]];
    }
    else if([self currentNavLevel] == MAINTENANCE)
    {
        [self setCurrentElements:[self maintenanceElements]];
        [self setCurrentStructure:[self maintenanceStructure]];
        [self setCurrentHeaders:[self maintenanceHeaders]];
    }
    //AND SO ON...
    [[self tableView] reloadData];
    NSRange range = NSMakeRange(0, [self numberOfSectionsInTableView:[self tableView]]);
    NSIndexSet *sections = [NSIndexSet indexSetWithIndexesInRange:range];
    [[self tableView] reloadSections:sections withRowAnimation:UITableViewRowAnimationAutomatic];
}

- (void) navBack
{
    NSNumber *prevLevel = [[self parentLayout] pop];
    self.currentNavLevel = prevLevel.intValue;
    [self changeNavLevel: prevLevel.intValue : FALSE];
}

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
    NSString *title = @"";
    if([self currentHeaders] != nil)
    {
        title = [[self currentHeaders] objectAtIndex:section];
    }
    return title;
}

- (void) backButtonPressed: (id) sender
{
    NSLog(@"[MenuTableViewController.m]: Navigation Stack has %ld remaining levels",[[self parentLayout] count]);
    if([[self parentLayout] count] > 0)
    {
        NSLog(@"[MenuTableViewController.m]: Falling to previous navigation level");
        [self navBack];
    }
    else
    {
        NSLog(@"[MenuTableViewController.m]: No more navigation levels in stack, falling to previous view");
        [self.navigationController popViewControllerAnimated:YES];
    }
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    [_activityIndicator setHidden:YES];
    
    self.navigationItem.hidesBackButton = YES;
    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Back" style:UIBarButtonItemStylePlain target:self action:@selector(backButtonPressed:)];
    
    //Emmoco protocol initialization
    _protocol = [CommunicationProtocol sharedProtocol];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didReceiveNotification:) name:kEMConnectionDidReceiveIndicatorNotificationName object:nil];
    [[EMConnectionManager sharedManager] addObserver:self forKeyPath:@"connectionState" options:0 context:NULL];
    
    //DUREX protocol initialization
    [_protocol setMessageAvailable:false];
    if(![_protocol establishConnection])
    {
        UIAlertView* alert = [[UIAlertView alloc] initWithTitle:@"Communication error" message:@"Error while trying to connect to the device." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [alert show];
        UIViewController *previous = [[[self navigationController] viewControllers] objectAtIndex:[[[self navigationController] viewControllers] count]-2];
        [[self navigationController] popToViewController:previous animated:YES];
    }
    
    //Initialize parentLayout stack
    [self setParentLayout:[[Stack alloc]init]];
    
    //Set navigation level
    [self initializeMenuEntries];
    self.currentNavLevel = 255;
    [self changeNavLevel:MENU:FALSE];
    /*    
     DUREXAppDelegate *appDelegate = (DUREXAppDelegate *)[[UIApplication sharedApplication] delegate];
     CustomNavigationController *navController = [appDelegate navController];
     navController.auxController = self;
     */
    
    // Uncomment the following line to preserve selection between presentations.
    // self.clearsSelectionOnViewWillAppear = NO;
    
    // Uncomment the following line to display an Edit button in the navigation bar for this view controller.
    // self.navigationItem.rightBarButtonItem = self.editButtonItem;
}

-(void)didReceiveNotification:(NSNotification*) notification
{
    id notificationValue = [[notification userInfo] objectForKey:kEMIndicatorResourceValueKey];
    NSString *resourceName = [[notification userInfo] objectForKey:kEMIndicatorNameKey];
    if([resourceName isEqualToString:@"messageAvailable"])
    {
        NSString *resourceValue = [notificationValue stringValue];
        if([resourceValue isEqualToString:@"TRUE"])
        {
            [_protocol setMessageAvailable:TRUE];
        }
        else
        {
            [_protocol setMessageAvailable:FALSE];
        }
    }
}

-(void)dealloc
{
    [[EMConnectionManager sharedManager] removeObserver:self forKeyPath:@"connectionState"];
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

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

-(void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
{
    if (object == [EMConnectionManager sharedManager])
    {
        if ([keyPath isEqualToString:@"connectionState"])
        {
            if ([[EMConnectionManager sharedManager] connectionState] == EMConnectionStateDisrupted)
            {
                [[self navigationController] popToRootViewControllerAnimated:YES];
            }
        }
    }
}

#pragma mark - Table view delegate

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSLog(@"Section: %ld Row: %ld",(long)[indexPath section],(long)[indexPath row]);
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
    NSString *cellName = [[[[self tableView] cellForRowAtIndexPath:indexPath]textLabel]text];
    if([cellName isEqualToString:@"Maintenance"])
    {
        NSLog(@"[MenuTableViewController.m]: Changing to navLevel: MAINTENANCE");

        [self changeNavLevel:MAINTENANCE:TRUE];
    }
}

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return [[self currentStructure] count];
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [[[self currentStructure]objectAtIndex:section] integerValue];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:[self currentCellIdentifier] forIndexPath:indexPath];
    
    if (cell == nil)
    {
        NSLog(@"[MenuTableViewController.m]: Initializing cell");
        if([self currentNavLevel] == MAINTENANCE)
        {
            NSLog(@"[MenuTableViewController.m]: Dispatching Maintenance-type cell");
            cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:[self currentCellIdentifier]];
        }
        else
        {
            cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:[self currentCellIdentifier]];
        }
    }
    uint8_t offset = 0;
    if([indexPath section] )
    {
        for (int i = 0; i < [indexPath section]; i++)
        {
            offset += [[[self currentStructure] objectAtIndex:i] unsignedCharValue];
        }
    }
    [[cell textLabel] setText:[[self currentElements] objectAtIndex:[indexPath row]+offset]];
    if([self currentNavLevel] == MAINTENANCE)
    {
        NSLog(@"[MenuTableViewController.m]: Customizing cell for navLevel MAINTENANCE");
        [[cell detailTextLabel] setText:@"VALUE"];
        [cell setAccessoryView: [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"icon_checkmark"]]];
        if( [[[cell textLabel] text] isEqualToString:@"5€ Notes"])
        {
            [cell setAccessoryView: [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"icon_delete"]]];
        }
    }
    return cell;
}


/*
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
    // Return NO if you do not want the specified item to be editable.
    return YES;
}
*/

/*
// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (editingStyle == UITableViewCellEditingStyleDelete) {
        // Delete the row from the data source
        [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
    } else if (editingStyle == UITableViewCellEditingStyleInsert) {
        // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
    }   
}
*/

/*
// Override to support rearranging the table view.
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath
{
}
*/

/*
// Override to support conditional rearranging of the table view.
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
{
    // Return NO if you do not want the item to be re-orderable.
    return YES;
}
*/

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

@end