#import "VideoViewController.h"
#import "GStreamerBackend.h"
#import <UIKit/UIKit.h>

@interface VideoViewController () {
    GStreamerBackend *gst_backend;
    int media_width;
    int media_height;
}

@end

@implementation VideoViewController

@synthesize uri;

/*
 * Private methods
 */
- (void) updateTimeWidget
{
    NSInteger position = time_slider.value / 1000;
    NSInteger duration = time_slider.maximumValue / 1000;
    NSString *position_txt = @" -- ";
    NSString *duration_txt = @" -- ";

    if (duration > 0) {
        NSUInteger hours = duration / (60 * 60);
        NSUInteger minutes = (duration / 60) % 60;
        NSUInteger seconds = duration % 60;

        duration_txt = [NSString stringWithFormat:@"%02u:%02u:%02u", hours, minutes, seconds];
    }
    if (position > 0) {
        NSUInteger hours = position / (60 * 60);
        NSUInteger minutes = (position / 60) % 60;
        NSUInteger seconds = position % 60;

        position_txt = [NSString stringWithFormat:@"%02u:%02u:%02u", hours, minutes, seconds];
    }

    NSString *text = [NSString stringWithFormat:@"%@ / %@",
                      position_txt, duration_txt];

    time_label.text = text;
}

/*
 * Methods from UIViewController
 */

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    play_button.enabled = FALSE;
    pause_button.enabled = FALSE;
    
    /* Make these constant for now, later tutorials will change them */
    media_width = 320;
    media_height = 240;

    gst_backend = [[GStreamerBackend alloc] init:self videoView:video_view];
}

- (void)viewDidDisappear:(BOOL)animated
{
    if (gst_backend)
    {
        [gst_backend deinit];
    }
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

/* Called when the Play button is pressed */
-(IBAction) play:(id)sender
{
    [gst_backend play];
}

/* Called when the Pause button is pressed */
-(IBAction) pause:(id)sender
{
    [gst_backend pause];
}

/* Called when the size of the main view has changed, so we can
 * resize the sub-views in ways not allowed by storyboarding. */
- (void)viewDidLayoutSubviews
{
    CGFloat view_width = video_container_view.bounds.size.width;
    CGFloat view_height = video_container_view.bounds.size.height;

    CGFloat correct_height = view_width * media_height / media_width;
    CGFloat correct_width = view_height * media_width / media_height;

    if (correct_height < view_height) {
        video_height_constraint.constant = correct_height;
        video_width_constraint.constant = view_width;
    } else {
        video_width_constraint.constant = correct_width;
        video_height_constraint.constant = view_height;
    }

    time_slider.frame = CGRectMake(time_slider.frame.origin.x, time_slider.frame.origin.y, toolbar.frame.size.width - time_slider.frame.origin.x - 8, time_slider.frame.size.height);
}

/*
 * Methods from GstreamerBackendDelegate
 */

-(void) gstreamerInitialized
{
    dispatch_async(dispatch_get_main_queue(), ^{
        play_button.enabled = TRUE;
        pause_button.enabled = TRUE;
        message_label.text = @"Ready";
        [gst_backend setUri:uri];
    });
}

-(void) gstreamerSetUIMessage:(NSString *)message
{
    dispatch_async(dispatch_get_main_queue(), ^{
        message_label.text = message;
    });
}

-(void) mediaSizeChanged:(NSInteger)width height:(NSInteger)height
{
    media_width = width;
    media_height = height;
    dispatch_async(dispatch_get_main_queue(), ^{
        [self viewDidLayoutSubviews];
        [video_view setNeedsLayout];
        [video_view layoutIfNeeded];
    });
}

-(void) setCurrentPosition:(NSInteger)position duration:(NSInteger)duration
{
    dispatch_async(dispatch_get_main_queue(), ^{
        time_slider.maximumValue = duration;
        time_slider.value = position;
        [self updateTimeWidget];
    });
}

@end