//
//  Lesson+Create.m
//  Palabel
//
//  Created by Abel Fokkinga on 1/29/12.
//  Copyright (c) 2012 T-consult International vof. All rights reserved.
//

#import "Lesson+Create.h"

@implementation Lesson (Create)

+ (void) addLessonWithTitle:(NSString *) title andSubTitle:(NSString *)subTitle
                    inTense:(Tense *)tense conjugatedBy:(id <Conjugator>) conjugator inManagedObjectContext:(NSManagedObjectContext *) context

{
    Lesson *lesson = nil;
    // Check if a lesson with this name already exists for this tense
    
    NSLog(@"Adding Lesson %@ for tense %@ in %@ at context %@", title, tense.tense, [conjugator description], context);
    
    NSFetchRequest *request = [[NSFetchRequest alloc] initWithEntityName:@"Lesson"];
    
    // Where clause
    request.predicate = [NSCompoundPredicate andPredicateWithSubpredicates:[NSArray arrayWithObjects:[NSPredicate predicateWithFormat:@"title = %@", title],[NSPredicate predicateWithFormat:@"tense = %@", tense.tense], [NSPredicate predicateWithFormat:@"conjugator = %@", [conjugator description]],nil]];
    
    // Order by
    //request.sortDescriptors = [NSSortDescriptor sortDescriptorWithKey:@"dateAdded" ascending:YES];

    
    NSError *error = nil;
    NSArray *lessons = [context executeFetchRequest:request error:&error];
    
    if ( error || [lessons count] > 0) {
        NSLog(@"Could not add lesson: %@", error.description);
    } else {
        NSLog(@"Inserting new lesson in context %@", context);
        lesson = [NSEntityDescription insertNewObjectForEntityForName:@"Lesson" inManagedObjectContext:context];
        lesson.title = title;
        lesson.subTitle = subTitle;
        lesson.tense = tense.tense;
        lesson.conjugator = [conjugator description];
        lesson.dateAdded = [[NSDate alloc] initWithTimeIntervalSinceNow:0];
        
        NSLog(@"Saving context");
        [context save:&error];
    }
}

@end