/*

     File: MessageView.m

 Abstract: 

    This is a content view class for managing the 'text message' type table view cells

  Version: 1.0

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@import MultipeerConnectivity;

#import "MessageView.h"

#import "Transcript.h"

// Constants for view sizing and alignment

#define MESSAGE_FONT_SIZE       (17.0)

#define NAME_FONT_SIZE          (10.0)

#define BUFFER_WHITE_SPACE      (14.0)

#define DETAIL_TEXT_LABEL_WIDTH (220.0)

#define NAME_OFFSET_ADJUST      (4.0)

#define BALLOON_INSET_TOP    (30 / 2)

#define BALLOON_INSET_LEFT   (36 / 2)

#define BALLOON_INSET_BOTTOM (30 / 2)

#define BALLOON_INSET_RIGHT  (46 / 2)

#define BALLOON_INSET_WIDTH (BALLOON_INSET_LEFT + BALLOON_INSET_RIGHT)

#define BALLOON_INSET_HEIGHT (BALLOON_INSET_TOP + BALLOON_INSET_BOTTOM)

#define BALLOON_MIDDLE_WIDTH (30 / 2)

#define BALLOON_MIDDLE_HEIGHT (6 / 2)

#define BALLOON_MIN_HEIGHT (BALLOON_INSET_HEIGHT + BALLOON_MIDDLE_HEIGHT)

#define BALLOON_HEIGHT_PADDING (10)

#define BALLOON_WIDTH_PADDING (30)

@interface MessageView ()

// Background image

@property (nonatomic, retain) UIImageView *balloonView;

// Message text string

@property (nonatomic, retain) UILabel *messageLabel;

// Name text (for received messages)

@property (nonatomic, retain) UILabel *nameLabel;

// Cache the background images and stretchable insets

@property (retain, nonatomic) UIImage *balloonImageLeft;

@property (retain, nonatomic) UIImage *balloonImageRight;

@property (assign, nonatomic) UIEdgeInsets balloonInsetsLeft;

@property (assign, nonatomic) UIEdgeInsets balloonInsetsRight;

@end

@implementation MessageView

- (id)initWithCoder:(NSCoder *)aDecoder

{

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

        self.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;

        // Initialization the views

        _balloonView = [UIImageView new];

        _messageLabel = [UILabel new];

        _messageLabel.numberOfLines = 0;

        _nameLabel = [UILabel new];

        _nameLabel.font = [UIFont systemFontOfSize:NAME_FONT_SIZE];

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

        self.balloonImageLeft = [UIImage imageNamed:@"bubble-left.png"];

        self.balloonImageRight = [UIImage imageNamed:@"bubble-right.png"];

        _balloonInsetsLeft = UIEdgeInsetsMake(BALLOON_INSET_TOP, BALLOON_INSET_RIGHT, BALLOON_INSET_BOTTOM, BALLOON_INSET_LEFT);

        _balloonInsetsRight = UIEdgeInsetsMake(BALLOON_INSET_TOP, BALLOON_INSET_LEFT, BALLOON_INSET_BOTTOM, BALLOON_INSET_RIGHT);

        // Add to parent view

        [self addSubview:_balloonView];

        [self addSubview:_messageLabel];

        [self addSubview:_nameLabel];

    }

    return self;

}

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

- (void)setTranscript:(Transcript *)transcript

{    

    // Set the message text

    NSString *messageText = transcript.message;

    _messageLabel.text = messageText;

    // Compute message size and frames

    CGSize labelSize = [MessageView labelSizeForString:messageText fontSize:MESSAGE_FONT_SIZE];

    CGSize balloonSize = [MessageView balloonSizeForLabelSize:labelSize];

    NSString *nameText = transcript.peerID.displayName;

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

    // Comput the X,Y origin offsets

    CGFloat xOffsetLabel;

    CGFloat xOffsetBalloon;

    CGFloat yOffset;

    if (TRANSCRIPT_DIRECTION_SEND == transcript.direction) {

        // Sent messages appear or right of view

        xOffsetLabel = 320 - labelSize.width - (BALLOON_WIDTH_PADDING / 2) - 3;

        xOffsetBalloon = 320 - balloonSize.width;

        yOffset = BUFFER_WHITE_SPACE / 2;

        _nameLabel.text = @"";

        // Set text color

        _messageLabel.textColor = [UIColor whiteColor];

        // Set resizeable image

        _balloonView.image = [self.balloonImageRight resizableImageWithCapInsets:_balloonInsetsRight];

    }

    else {

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

        xOffsetBalloon = 0;

        xOffsetLabel = (BALLOON_WIDTH_PADDING / 2) + 3;

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

        if (TRANSCRIPT_DIRECTION_LOCAL == transcript.direction) {

            _nameLabel.text = @"Session Admin";

        }

        else {

            _nameLabel.text = nameText;

        }

        // Set text color

        _messageLabel.textColor = [UIColor darkTextColor];

        // Set resizeable image

        _balloonView.image = [self.balloonImageLeft resizableImageWithCapInsets:_balloonInsetsLeft];

    }

    // Set the dynamic frames

    _messageLabel.frame = CGRectMake(xOffsetLabel, yOffset + 5, labelSize.width, labelSize.height);

    _balloonView.frame = CGRectMake(xOffsetBalloon, yOffset, balloonSize.width, balloonSize.height);

    _nameLabel.frame = CGRectMake(xOffsetLabel - 2, 1, nameSize.width, nameSize.height);

}

#pragma - class methods for computing sizes based on strings

+ (CGFloat)viewHeightForTranscript:(Transcript *)transcript

{

    CGFloat labelHeight = [MessageView balloonSizeForLabelSize:[MessageView labelSizeForString:transcript.message fontSize:MESSAGE_FONT_SIZE]].height;

    if (TRANSCRIPT_DIRECTION_SEND != transcript.direction) {

        // Need to add extra height for display name

        CGFloat nameHeight = [MessageView labelSizeForString:transcript.peerID.displayName fontSize:NAME_FONT_SIZE].height;

        return (labelHeight + nameHeight + BUFFER_WHITE_SPACE - NAME_OFFSET_ADJUST);

    }

    else {

        return (labelHeight + BUFFER_WHITE_SPACE);

    }

}

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

{

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

}

+ (CGSize)balloonSizeForLabelSize:(CGSize)labelSize

{

    CGSize balloonSize;

    if (labelSize.height < BALLOON_INSET_HEIGHT) {

        balloonSize.height = BALLOON_MIN_HEIGHT;

    }

    else {

        balloonSize.height = labelSize.height + BALLOON_HEIGHT_PADDING;

    }

    balloonSize.width = labelSize.width + BALLOON_WIDTH_PADDING;

    return balloonSize;

}

@end