/*

     File: APLSimpleStockViewController.m 

 Abstract: This view controller handles orientation changes and acts as the data source for SimpleStockView. 

  Version: 2.0 

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 */

#import "APLSimpleStockViewController.h"

#import "APLDailyTradeInfoSource.h"

#import "APLSimpleStockView.h"

@implementation APLSimpleStockViewController

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation {

    [[self view] setNeedsDisplay];

}

#pragma mark GraphViewDataSource methods

- (NSInteger)graphViewDailyTradeInfoCount:(APLSimpleStockView *)graphView {

    return [[DailyTradeInfoSource tradeInfoArray] count];

}

/*

 Return the month to be drawn.

 */

- (NSArray *)graphViewSortedMonths:(APLSimpleStockView *)graphView {

    NSCalendar *calendar = [NSCalendar currentCalendar];

    NSArray *closingDates = [[DailyTradeInfoSource tradeInfoArray] valueForKeyPath:@"tradingDate"];

    __block NSCountedSet *months = [NSCountedSet set];

    [closingDates enumerateObjectsUsingBlock:^(id closingDate, NSUInteger index, BOOL *stop) {

        [months addObject:[calendar components:NSMonthCalendarUnit fromDate:closingDate]];

    }];

    NSSortDescriptor *descriptor = [NSSortDescriptor sortDescriptorWithKey:@"month" ascending:YES];

    NSArray *descriptors = [NSArray arrayWithObject:descriptor];

    return [months sortedArrayUsingDescriptors:descriptors];

}

/*

 For the given month (in components) return the number of trades some months have 20 trading days, some have 23. This method makes it possible for us to layout the months names accordingly

 */

- (NSInteger)graphView:(APLSimpleStockView *)graphView tradeCountForMonth:(NSDateComponents *)components {

    NSCalendar *calendar = [NSCalendar currentCalendar];

    NSArray *closingDates = [[DailyTradeInfoSource tradeInfoArray] valueForKeyPath:@"tradingDate"];

    __block NSCountedSet *months = [NSCountedSet set];

    [closingDates enumerateObjectsUsingBlock:^(id closingDate, NSUInteger index, BOOL *stop) {

        [months addObject:[calendar components:NSMonthCalendarUnit fromDate:closingDate]];

    }];

    return [months countForObject:components];

}

/*

 * Return the model objects

 */

- (NSArray *)graphViewDailyTradeInfos:(APLSimpleStockView *)graphView {

    return [DailyTradeInfoSource tradeInfoArray];

}

/*

 * Return the max closing price

 */

- (CGFloat)graphViewMaxClosingPrice:(APLSimpleStockView *)graphView {

    return [[[DailyTradeInfoSource tradeInfoArray] valueForKeyPath:@"@max.closingPrice"] floatValue];

}

/*

 * Return the min closing price

 */

- (CGFloat)graphViewMinClosingPrice:(APLSimpleStockView *)graphView {

    return [[[DailyTradeInfoSource tradeInfoArray] valueForKeyPath:@"@min.closingPrice"] floatValue];

}

/*

 * Return the max trading volume

 */

- (CGFloat)graphViewMaxTradingVolume:(APLSimpleStockView *)graphView {

    return [[[DailyTradeInfoSource tradeInfoArray] valueForKeyPath:@"@max.tradingVolume"] floatValue];

}

/*

 * Return the min trading volume

 */

- (CGFloat)graphViewMinTradingVolume:(APLSimpleStockView *)graphView {

    return [[[DailyTradeInfoSource tradeInfoArray] valueForKeyPath:@"@min.tradingVolume"] floatValue];

}

@end