//
//  ViewController.m
//  SpectogramPrototype
//
//  Created by Joshua Moerman on 21/12/13.
//  Copyright (c) 2013 Joshua Moerman. All rights reserved.
//

#import <MediaPlayer/MPMediaPickerController.h>
#import <AudioToolbox/ExtendedAudioFile.h>

#import "ViewController.h"
#import "RuledScrollView.h"
#import "FFTTest.h"

@interface ViewController () <MPMediaPickerControllerDelegate> {
	UIPopoverController * pop;
	FFTTest * fft_handler;
}
- (void) openAudioFile:(NSURL*)filePath;
@property (nonatomic, strong) UILabel* header;
@end

@implementation ViewController

@synthesize scrollView, contentView, header;

- (void)viewDidLoad{
	[super viewDidLoad];
	
	if(!contentView){
		[[NSBundle mainBundle] loadNibNamed:@"ContentView" owner:self options:nil];
		[scrollView.content addSubview:contentView];
		contentView.autoresizingMask = UIViewAutoresizingNone;
		scrollView.contentSize = contentView.bounds.size;
	}
}

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

- (void)calculateButtonPressed:(id)sender{
	if(!fft_handler)
		fft_handler = [[FFTTest alloc] init];
	
	unsigned int size = fft_handler.acceptedSize;
	float * data = calloc(size, sizeof(float));
	[fft_handler inPlaceFFT:data forSize:size];
	free(data);
}

- (void)openAudioFile:(NSURL *)filePath{
	OSStatus err;
	
	ExtAudioFileRef audioFile = NULL;
	err = ExtAudioFileOpenURL((__bridge CFURLRef) filePath, &audioFile);
	assert(err == 0);
	
	AudioBufferList bufferList;
	bufferList.mNumberBuffers = 1;
	bufferList.mBuffers[0].mNumberChannels = 2;
	bufferList.mBuffers[0].mDataByteSize = 32768;
	bufferList.mBuffers[0].mData = calloc(32768, 1);
	
	while(true){
		bufferList.mBuffers[0].mDataByteSize = 32768;
		
		UInt32 nFrames = 32768 / 6;
		err = ExtAudioFileRead(audioFile, &nFrames, &bufferList);
		assert(err == 0);
		if(!nFrames) break;
	}
	
	NSLog(@"Read some bits");
	
	err = ExtAudioFileDispose(audioFile);
	assert(err == 0);
}

- (void)mediaButtonPressed:(UIButton*)sender{
	MPMediaPickerController * mppc = [[MPMediaPickerController alloc] initWithMediaTypes:MPMediaTypeAnyAudio];
	mppc.delegate = self;
	mppc.allowsPickingMultipleItems = NO;
	mppc.showsCloudItems = NO;

	if(pop){
		[pop dismissPopoverAnimated:YES];
		pop = nil;
	}
	
	pop = [[UIPopoverController alloc] initWithContentViewController:mppc];
	[pop presentPopoverFromRect:sender.frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}

- (void)mediaPicker:(MPMediaPickerController *)mediaPicker didPickMediaItems:(MPMediaItemCollection *)mediaItemCollection {
	for(MPMediaItem * mediaItem in mediaItemCollection.items){
		NSURL * url = [mediaItem valueForProperty:MPMediaItemPropertyAssetURL];
		[self openAudioFile:url];
	}
	[pop dismissPopoverAnimated:YES];
	pop = nil;
}

- (void)mediaPickerDidCancel:(MPMediaPickerController *)mediaPicker {
	[pop dismissPopoverAnimated:YES];
	pop = nil;
}

@end