/*

     File: ProgressView.m

 Abstract: 

    This is a content view class for managing the 'resource progress' type table view cells

  Version: 1.0

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@import MultipeerConnectivity;

#import "ProgressView.h"

#import "Transcript.h"

#import "ProgressObserver.h"

#define PROGRESS_VIEW_HEIGHT    (15.0)

#define PADDING_X               (15.0)

#define NAME_FONT_SIZE          (10.0)

#define BUFFER_WHITE_SPACE      (14.0)

#define PROGRESS_VIEW_WIDTH     (140.0)

#define PEER_NAME_HEIGHT        (12.0)

#define NAME_OFFSET_ADJUST      (4.0)

@interface ProgressView () <ProgressObserverDelegate>

// View for showing resource send/receive progress

@property UIProgressView *progressView;

// View for displaying sender name (received transcripts only)

@property UILabel *displayNameLabel;

// KVO progress observer for updating the progress bar based on NSProgress changes

@property ProgressObserver *observer;

@end

@implementation ProgressView

- (id)initWithCoder:(NSCoder *)aDecoder

{

    if (self = [super initWithCoder:aDecoder]) {

        self.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;

        // Initialization the sub views

        _progressView = [[UIProgressView alloc] initWithProgressViewStyle:UIProgressViewStyleDefault];

        _progressView.progress = 0.0;

        _displayNameLabel = [UILabel new];

        _displayNameLabel.font = [UIFont systemFontOfSize:10.0];

        _displayNameLabel.textColor = [UIColor colorWithRed:34.0/255.0 green:97.0/255.0 blue:221.0/255.0 alpha:1];

        // Add to parent view

        [self addSubview:_displayNameLabel];

        [self addSubview:_progressView];

    }

    return self;

}

// Method for setting the transcript object which is used to build this view instance.

- (void)setTranscript:(Transcript *)transcript

{

    // Create the progress observer

    self.observer = [[ProgressObserver alloc] initWithName:transcript.imageName progress:transcript.progress];

    // Listen for progress changes

    _observer.delegate = self;

    // Compute name size

    NSString *nameText = transcript.peerID.displayName;

    CGSize nameSize = [ProgressView labelSizeForString:nameText fontSize:NAME_FONT_SIZE];

    // Comput the X,Y origin offsets

    CGFloat xOffset;

    CGFloat yOffset;

    if (TRANSCRIPT_DIRECTION_SEND == transcript.direction) {

        // Sent images appear or right of view

        xOffset = 320 - PADDING_X - PROGRESS_VIEW_WIDTH;

        yOffset = BUFFER_WHITE_SPACE / 2;

        _displayNameLabel.text = @"";

    }

    else {

        // Received images appear on left of view with additional display name label

        xOffset = PADDING_X;

        yOffset = (BUFFER_WHITE_SPACE / 2) + nameSize.height - NAME_OFFSET_ADJUST;

        _displayNameLabel.text = nameText;

    }

    // Set the dynamic frames

    _displayNameLabel.frame = CGRectMake(xOffset, 1, nameSize.width, nameSize.height);

    _progressView.frame = CGRectMake(xOffset, yOffset + 5, PROGRESS_VIEW_WIDTH, PROGRESS_VIEW_HEIGHT);

}

#pragma - class methods for computing sizes based on strings

+ (CGFloat)viewHeightForTranscript:(Transcript *)transcript

{

    // Return dynamic height of the cell based on the particular transcript

    if (TRANSCRIPT_DIRECTION_RECEIVE == transcript.direction) {

        // The senders name height is included for received messages

        return (PEER_NAME_HEIGHT + PROGRESS_VIEW_HEIGHT + BUFFER_WHITE_SPACE - NAME_OFFSET_ADJUST);

    }

    else {

        // Just the scaled image height and some buffer space

        return (PROGRESS_VIEW_HEIGHT + BUFFER_WHITE_SPACE);

    }

}

+ (CGSize)labelSizeForString:(NSString *)string fontSize:(CGFloat)fontSize

{

    return [string boundingRectWithSize:CGSizeMake(PROGRESS_VIEW_WIDTH, 2000.0) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName : [UIFont systemFontOfSize:fontSize]} context:nil].size;

}

#pragma mark - ProgressObserver delegate methods

- (void)observerDidChange:(ProgressObserver *)observer

{

    dispatch_async(dispatch_get_main_queue(), ^{

        // Update the progress bar with the latest completion %

        _progressView.progress = observer.progress.fractionCompleted;

        NSLog(@"progress changed completedUnitCount[%lld]", observer.progress.completedUnitCount);

    });

}

- (void)observerDidCancel:(ProgressObserver *)observer

{

    NSLog(@"progress canceled");

}

- (void)observerDidComplete:(ProgressObserver *)observer

{

    NSLog(@"progress complete"); 

}

@end