//
//  JSRunDistanceHistory.m
//  JSRun Import Framework
//
//  Created by Jonathan on 8/30/06.
//  Copyright 2006 Jonathan Saggau. All rights reserved.
//

#import "JSRunDistanceHistory.h"

@interface JSRunDistanceHistory (privateAPI)
- (NSArray *)calculateDistanceTraveledPerSnapshot;
@end

@implementation JSRunDistanceHistory

- (id) init {
    self = [super init];
    if (self != nil) {
        distances = [[NSArray alloc] init];
        attributes = [[NSDictionary alloc] init];
    }
    return self;
}

- (NSArray *)calculateDistanceTraveledPerSnapshot;
{
    NSMutableArray *outArray = [NSMutableArray arrayWithCapacity:[distances count]];
    NSEnumerator *enumerator = [distances objectEnumerator];
    
    NSNumber *adistance;
    float lastDist = 0.0;
    while (adistance = [enumerator nextObject]) {
        float currDist = [adistance floatValue];
        float currSpeed = currDist - lastDist;
        if (lastDist != currDist) {
            [outArray addObject:[NSNumber numberWithFloat:currSpeed]];
        }
        lastDist = currDist;
    }
    return outArray;
}

- (NSArray *)distanceTraveledPerSnapshot;
{
    return _distanceTraveledPerSnapshot;
}

#pragma mark -
#pragma mark accessors

//=========================================================== 
//  distances 
//=========================================================== 
- (NSArray *)distances
{
    return distances; 
}
- (void)setDistances:(NSArray *)aDistances
{
    if (distances != aDistances) {
        [aDistances retain];
        [distances release];
        distances = aDistances;
        
        NSArray *tempDistances;
        tempDistances = [self calculateDistanceTraveledPerSnapshot];
        [tempDistances retain];
        [_distanceTraveledPerSnapshot release];
        _distanceTraveledPerSnapshot = tempDistances;
        // only calculate when distances change
    }
}

//=========================================================== 
//  attributes 
//=========================================================== 
- (NSDictionary *)attributes
{
    return attributes; 
}
- (void)setAttributes:(NSDictionary *)anAttributes
{
    if (attributes != anAttributes) {
        [anAttributes retain];
        [attributes release];
        attributes = anAttributes;
    }
}


//=========================================================== 
// dealloc
//=========================================================== 
- (void)dealloc
{
    [self setDistances:nil];
    [self setAttributes:nil];
    [super dealloc];
}

#pragma mark -
#pragma mark pretty description

- (NSString *)description
{
    NSMutableString *desc = [NSMutableString stringWithFormat:@"Simple Description = %@ \n", [super description]];
    [desc appendFormat:@"attributes = %@ \n", [self attributes]];
    [desc appendFormat:@"distance = %@ \n", [self distances]];
    return desc;
}

@end