//
//  SAVBarView.m
//  HappinessIndex
//
//  Created by Robert Evans on 11/25/08.
//  Copyright 2008 South And Valley. All rights reserved.
//

#import "SAVBarView.h"

static void addRoundedRectToPath(CGContextRef context, CGRect rect, float ovalWidth, float ovalHeight)
{
    float fw, fh;
    if (ovalWidth == 0 || ovalHeight == 0) {
        CGContextAddRect(context, rect);
        return;
    }
    CGContextSaveGState(context);
    CGContextTranslateCTM (context, CGRectGetMinX(rect), CGRectGetMinY(rect));
    CGContextScaleCTM (context, ovalWidth, ovalHeight);
    fw = CGRectGetWidth (rect) / ovalWidth;
    fh = CGRectGetHeight (rect) / ovalHeight;
    CGContextMoveToPoint(context, fw, fh/2);
    CGContextAddArcToPoint(context, fw, fh, fw/2, fh, 1);
    CGContextAddArcToPoint(context, 0, fh, 0, fh/2, 1);
    CGContextAddArcToPoint(context, 0, 0, fw/2, 0, 1);
    CGContextAddArcToPoint(context, fw, 0, fw, fh/2, 1);
    CGContextClosePath(context);
    CGContextRestoreGState(context);
}

@implementation SAVBarView


- (id)initWithFrame:(CGRect)frame {
    if (self = [super initWithFrame:frame]) {
         self.backgroundColor = [UIColor clearColor];
    }
    return self;
}


- (void)drawRect:(CGRect)rect {
   	CGContextRef context = UIGraphicsGetCurrentContext();
    //CGContextStrokeRectWithWidth(context, rect, 1.0);
    // Screen 320x480
    // status bar is 20 px.
    // Tabbar 49 px ?? maybe
    //
    // Each happi unit 43.1

    // !!!:robevans:20081125 FontSize ought to be a variable.
    //float happiUnit = 43.1;
    float fontSize = 24.0f;
    //                              {0, 387} , {24,24}
    CGRect labelRect= {{rect.origin.x, rect.size.height - fontSize }, {fontSize, fontSize}};

    UILabel *label = [[UILabel alloc] initWithFrame:labelRect];
    label.autoresizesSubviews = YES;
    label.textAlignment = UITextAlignmentCenter;
    label.font = [UIFont fontWithName:@"Helvetica" size:fontSize];
    label.autoresizingMask = (UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight);
    label.text = @"10";
    label.textColor = [UIColor orangeColor];
    label.shadowColor = [UIColor grayColor];
    label.backgroundColor = [UIColor clearColor];
    label.adjustsFontSizeToFitWidth = TRUE;

    // XXX The height and y coordinate need to be pre calculated
    CGRect barRect = {{rect.origin.x, 0.0f }, {rect.size.width, rect.size.height/2 }};


    [self addRoundRect:barRect radius:6.0f];
    //[self addSubview:[self createBarView:imageRect]];
    [self addSubview:label];
    [label release];

        // SAVBarView will have our total hight but the width will be adjusted.
    //CGRect barRect = CGRectMake(0.0f, 0.0f, 31.0f, rect.size.height);
    //self.frame = rect;
}

-(void) addRoundRect:(CGRect)rect radius:(float)radius{
	CGContextRef context = UIGraphicsGetCurrentContext();



    CGSize offset;
    CGColorRef shadowColor;
    //CGContextTranslateCTM(context, 20, 300);

    offset.width = 5;
    offset.height = -5;
    // Set the shadow in the context.
    CGContextSetShadow(context, offset, 0.0);


    // If you were making this as a routine, you would probably accept a rectangle
	// that defines its bounds, and a radius reflecting the "rounded-ness" of the rectangle.
	CGFloat radius1 = 6.0;
	// NOTE: At this point you may want to verify that your radius is no more than half
	// the width and height of your rectangle, as this technique degenerates for those cases.

	// In order to draw a rounded rectangle, we will take advantage of the fact that
	// CGContextAddArcToPoint will draw straight lines past the start and end of the arc
	// in order to create the path from the current position and the destination position.

	// In order to create the 4 arcs correctly, we need to know the min, mid and max positions
	// on the x and y lengths of the given rectangle.
	CGFloat minx = CGRectGetMinX(rect), midx = CGRectGetMidX(rect), maxx = CGRectGetMaxX(rect);
	CGFloat miny = CGRectGetMinY(rect), midy = CGRectGetMidY(rect), maxy = CGRectGetMaxY(rect);

	// Next, we will go around the rectangle in the order given by the figure below.
	//       minx    midx    maxx
	// miny    2       3       4
	// midy   1 9              5
	// maxy    8       7       6
	// Which gives us a coincident start and end point, which is incidental to this technique, but still doesn't
	// form a closed path, so we still need to close the path to connect the ends correctly.
	// Thus we start by moving to point 1, then adding arcs through each pair of points that follows.
	// You could use a similar tecgnique to create any shape with rounded corners.

	// Start at 1
	CGContextMoveToPoint(context, minx, midy);
	// Add an arc through 2 to 3
	CGContextAddArcToPoint(context, minx, miny, midx, miny, radius1);
	// Add an arc through 4 to 5
	CGContextAddArcToPoint(context, maxx, miny, maxx, midy, radius1);
	// Add an arc through 6 to 7
	CGContextAddArcToPoint(context, maxx, maxy, midx, maxy, radius1);
	// Add an arc through 8 to 9
	CGContextAddArcToPoint(context, minx, maxy, minx, midy, radius1);
	// Close the path
	CGContextClosePath(context);
	// Fill & stroke the path


    //CGContextDrawPath(context, kCGPathFillStroke);
    float kWhiteColor[] = { .37265, .46003, .34952, 1.0};
    CGContextSetFillColor(context, kWhiteColor);

    CGContextDrawPath(context, kCGPathFill);
    //CGContextStrokePath(context);

}



/*  Given a rect, create an image view
 *
 */
- (UIImageView*)createBarView:(CGRect)rect{

    UIImage *image = [self createBar:rect];
    UIImageView *imageView = [[UIImageView alloc] initWithImage:image];

    // XXX why do we have to do this?
    // imageView.frame = rect;
    return imageView;
}
// ought to take a hight value that determines how high the bar will go.
// should bar.png be hardcoded?
- (UIImage *)createBar:(CGRect)rect{


    UIImage *img = [UIImage imageNamed:@"bar.png"];
    int w = img.size.width;
    int h = img.size.height;

    CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
    CGContextRef context = CGBitmapContextCreate(NULL, w, h, 8, 4 * w, colorSpace, kCGImageAlphaPremultipliedFirst);


    CGContextBeginPath(context);

    //CGRect rect = CGRectMake(0, 0, img.size.width, img.size.height - unit);

    addRoundedRectToPath(context, rect, 6, 6);
    CGContextClosePath(context);
    CGContextClip(context);


    // XXX setting x is cropping the bottom of the rect.
    CGContextDrawImage(context, CGRectMake(0.0, 85.0, w, h), img.CGImage);
    //CGContextDrawImage(context, rect, img.CGImage);

    CGImageRef imageMasked = CGBitmapContextCreateImage(context);
    CGContextRelease(context);
    CGColorSpaceRelease(colorSpace);
    [img release];

    UIImage *image = [UIImage imageWithCGImage:imageMasked];

    return image;
}




- (void)dealloc {
    [super dealloc];
}


@end