//
//  EspagramLessonViewController.m
//  Espagram
//
//  Created by Abel Fokkinga on 11/12/12.
//  Copyright (c) 2012 Abel Fokkinga. All rights reserved.
//

#import "EspagramLessonViewController.h"
#import "Lesson+Create.h"
#import "Lesson+Conjugator.h"
#import "EspagramTestViewController.h"


@interface EspagramLessonViewController ()
@end

@implementation EspagramLessonViewController

@synthesize lessonsDatabase = _lessonsDatabase;
@synthesize conjugator = _conjugator;
@synthesize tense = _tense;


- (IBAction)addLessonButtonPressed:(id)sender {
    [self performSegueWithIdentifier:@"Add new Lesson" sender:self];
}

- (void) addLesson:(NSString*)title withDescription:(NSString*) subTitle {
    
    NSLog(@"Need to dismiss modal view controller");
    [[self presentedViewController] dismissViewControllerAnimated:TRUE completion:^{
        NSLog(@"View controller dismissed");
    }];
    
    NSLog(@"database %@, context %@", self.lessonsDatabase,[self.lessonsDatabase managedObjectContext]);
    
    [Lesson addLessonWithTitle:title andSubTitle:subTitle inTense:self.tense conjugatedBy:self.conjugator inManagedObjectContext:[self.lessonsDatabase managedObjectContext]];
    
    [self.lessonsDatabase saveToURL:self.lessonsDatabase.fileURL forSaveOperation:UIDocumentSaveForOverwriting completionHandler:NULL];
}

- (void) cancelLesson{
    NSLog(@"Cancel pressed, need to dismiss modal view controller");
    [[self presentedViewController] dismissViewControllerAnimated:TRUE completion:^{
        NSLog(@"View controller dismissed");
    }];
}




#pragma mark - View lifecycle


- (void) setupFetchedResultsController{
    NSFetchRequest *request = [[NSFetchRequest alloc] initWithEntityName:@"Lesson"];
    
    self.debug = TRUE;
    
    // Where clause
    request.predicate = [NSCompoundPredicate andPredicateWithSubpredicates:[NSArray arrayWithObjects:[NSPredicate predicateWithFormat:@"tense = %@", self.tense.tense], [NSPredicate predicateWithFormat:@"conjugator = %@", [self.conjugator description]],nil]];
    
    
    request.sortDescriptors =  [[NSArray alloc] initWithObjects:[[NSSortDescriptor alloc] initWithKey:@"title" ascending:TRUE], nil];
    
    self.fetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:request managedObjectContext:self.lessonsDatabase.managedObjectContext sectionNameKeyPath:nil cacheName:nil];
}

- (void) createDocument
{
    [self.lessonsDatabase saveToURL:self.lessonsDatabase.fileURL forSaveOperation:UIDocumentSaveForCreating completionHandler:^(BOOL succes){
        NSLog(@"Created lessons database");
    }];
    
}


- (void) useDocument
{
    if (![[NSFileManager defaultManager] fileExistsAtPath:[self.lessonsDatabase.fileURL path]]) {
        [self createDocument];
        [self fetchedResultsController];
    } else if (self.lessonsDatabase.documentState == UIDocumentStateClosed){
        [self.lessonsDatabase openWithCompletionHandler:^(BOOL succes){
            NSLog(@"Opened lessons database");
                [self setupFetchedResultsController];
        }];
    } else if (self.lessonsDatabase.documentState == UIDocumentStateNormal) {
        [self setupFetchedResultsController];
    }
    
}


- (void) setLessonsDatabase:(UIManagedDocument *)lessonsDatabase{
    if ( _lessonsDatabase != lessonsDatabase ) {
        _lessonsDatabase = lessonsDatabase;
        [self useDocument];
    }
    
}

- (void)viewWillAppear:(BOOL)animated{
    
    [super viewWillAppear:animated];
    
    self.title = NSLocalizedString(@"Lessons title",@"Lessons title");
    
    if (!self.lessonsDatabase) {  // We'll create a default database if none is set
        NSURL *url = [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDirectory] lastObject];
        url = [url URLByAppendingPathComponent:@"Default Espagram database"];
        
        UIManagedDocument *doc = [[UIManagedDocument alloc] initWithFileURL:url];
        NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
                                 [NSNumber numberWithBool:YES], NSMigratePersistentStoresAutomaticallyOption,
                                 [NSNumber numberWithBool:YES], NSInferMappingModelAutomaticallyOption, nil];
        doc.persistentStoreOptions = options;
        self.lessonsDatabase = doc;
    }
    
}


- (void)viewDidUnload {
    
    [super viewDidUnload];
    
    [self.lessonsDatabase closeWithCompletionHandler:^(BOOL success) {
          NSLog(@"Database closed");
    }];
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Lesson cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
    
    Lesson *lesson = [self.fetchedResultsController objectAtIndexPath:indexPath];
    NSLog(@"Showing lesson: %@", lesson.title);
    cell.textLabel.text = lesson.title;
    cell.detailTextLabel.text = lesson.subTitle;
    
    return cell;
}

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    NSIndexPath * indexPath = [self.tableView indexPathForCell:sender];
    Lesson * lesson = [self.fetchedResultsController objectAtIndexPath:indexPath];
   
    if ( [segue.identifier isEqualToString:@"Testing"]){
        NSLog(@"Preparing for segue Testing");
        
        if ([segue.destinationViewController respondsToSelector:@selector(setConjugator:)]) {
            [segue.destinationViewController setConjugator:self.conjugator];
        }
        
        
        if ([segue.destinationViewController respondsToSelector:@selector(setLesson:)]) {
            [segue.destinationViewController setLesson:lesson];
            [segue.destinationViewController setTitle:lesson.title];
        }
    }
    
    if ( [segue.identifier isEqualToString:@"Add new Lesson"]){
        NSLog(@"Preparing for segue Add new Lesson");
        [segue.destinationViewController setDataSource:self];
    }
    
    if ( [segue.identifier isEqualToString:@"Show Words In Lesson"]){
        NSLog(@"Preparing for segue Show Words In Lesson");
        if ([segue.destinationViewController respondsToSelector:@selector(setLesson:)]) {
            [segue.destinationViewController setLesson:lesson];
        }
    }
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    Lesson * lesson = [self.fetchedResultsController objectAtIndexPath:indexPath];
    
    if ( [lesson.verbs count] == 0) {
        // Lesson contains no words yet.. so go to the WordsInLessonView to add them
        // sender is the selected cell
        [self performSegueWithIdentifier:@"Show Words In Lesson" sender:[self.tableView cellForRowAtIndexPath:indexPath]];
    } else {
        [self performSegueWithIdentifier:@"Testing" sender:[self.tableView cellForRowAtIndexPath:indexPath]];
    }
    
    
}

- (void)tableView:(UITableView *)tableView accessoryButtonTappedForRowWithIndexPath:(NSIndexPath *)indexPath
{
        [self performSegueWithIdentifier:@"Show Words In Lesson" sender:[self.tableView cellForRowAtIndexPath:indexPath]];
}

// 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];
        Lesson * selectedLesson = [self.fetchedResultsController objectAtIndexPath:indexPath];
        [[self.lessonsDatabase managedObjectContext] deleteObject:selectedLesson];
    }
    //   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
    //   }
}



@end