//
//  Verb+Create.m
//  Espagram
//
//  Created by Abel Fokkinga on 11/16/12.
//  Copyright (c) 2012 Abel Fokkinga. All rights reserved.
//

#import "Verb+Create.h"


@implementation Verb (Create)

+ (void) addVerb:(NSString *)newVerb andMeaning:(NSString *)meaning toLesson:(Lesson *)lesson
{
    Verb * verb = [NSEntityDescription insertNewObjectForEntityForName:@"Verb" inManagedObjectContext:[lesson managedObjectContext]];
    
    newVerb = [newVerb lowercaseString];
    
    // Check first if the lessons already contains this verb
    for ( Verb * v in lesson.verbs) {
        if ( [newVerb isEqualToString:v.verb]) {
            if (meaning == nil)
                return;
            else if ([meaning isEqualToString:v.meaning])
                return;
        }
    }
    
    if ( [lesson.conjugator isEqualToString:@"Spanish"]) {
        if ( newVerb.length >= 2 ) {
            NSString *verbExit = [newVerb substringFromIndex:newVerb.length - 2];
            if ( ![verbExit isEqualToString:@"ar"] &&
                 ![verbExit isEqualToString:@"er"] &&
                 ![verbExit isEqualToString:@"ir"] &&
                 ![verbExit isEqualToString:@"ír"] &&
                 ![verbExit isEqualToString:@"se"] ) {
                // Not an existing Spanish verb
                return;
            }
            if ( [verbExit isEqualToString:@"se"] && newVerb.length >= 4 ) {
                verbExit = [[newVerb substringFromIndex:newVerb.length - 4] substringToIndex:2];
                if ( ![verbExit isEqualToString:@"ar"] &&
                     ![verbExit isEqualToString:@"er"] &&
                     ![verbExit isEqualToString:@"ir"] &&
                     ![verbExit isEqualToString:@"ír"] ) {
                    // Not an existing Spanish verb
                    return;
                }
            }
        } else {
            // Verb should be longer than 2 characters
            return;
        }
    }
    NSLog(@"Adding word %@", newVerb);
    verb.verb = newVerb;
    verb.meaning = meaning;
    [lesson addVerbsObject:verb];
    [[lesson managedObjectContext] save:nil];
};

+ (Verb *) searchWordMeaning:(NSString *)verb usingLessonLanguage:(Lesson *)lesson
{
    
        NSFetchRequest *request = [[NSFetchRequest alloc] initWithEntityName:@"Verb"];
        
        
        // Where clause
        request.predicate = [NSCompoundPredicate andPredicateWithSubpredicates:[NSArray arrayWithObjects:[NSPredicate predicateWithFormat:@"verb = %@", verb],
            [NSPredicate predicateWithFormat:@"meaning != nil AND meaning !=''"],
            [NSPredicate predicateWithFormat:@"lesson.conjugator = %@", lesson.conjugator],nil]];
    
    
        
        NSError *error = nil;
        NSArray *verbs = [[lesson managedObjectContext] executeFetchRequest:request error:&error];
        
        if ( verbs && verbs.count > 0 ){
            return [verbs lastObject];
        }
        
        return nil;
};

@end