/*

     File: AddFilterController.m

 Abstract: View controller for the "Add Filter" table view.

  Version: 1.0

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 */

#import <AssetsLibrary/AssetsLibrary.h>

#import "AddFilterController.h"

#import "CIFilter+FHAdditions.h"

@implementation AddFilterController

@synthesize delegate = _delegate;

@synthesize filterStack = _filterStack;

@synthesize controllerType = _controllerType;

@synthesize imagePickerPopoverController = _imagePickerPopoverController;

@synthesize imagePickerNavigationController = _imagePickerNavigationController;

enum {kAddFilterTableSectionSourceType, kAddFilterTableSectionFilterType};

- (NSArray *)filters

{

    return _filterStack.possibleNextFilters;

}

#pragma mark - View lifecycle

- (void)viewDidLoad

{

    [super viewDidLoad];

    self.title = @"Add Filter";

    [[NSNotificationCenter defaultCenter] addObserver:self

                                             selector:@selector(_handleFilterStackActiveFilterListDidChangeNotification:)

                                                 name:FilterStackActiveFilterListDidChangeNotification

                                               object:nil];

}

- (void) _handleFilterStackActiveFilterListDidChangeNotification:(NSNotification *)notification

{

    [self.tableView reloadData];

}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation

{

    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone)

        return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);

    else

        return YES;

}

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView

{

    return 2;

}

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section

{

    if (section == kAddFilterTableSectionSourceType)

        return @"Sources";

    else

        return @"Filters";

}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

{

    return section == kAddFilterTableSectionSourceType ? [_filterStack.sources count] : [_filterStack.possibleNextFilters count];

}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

{

    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    if (cell == nil)

        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle

                                      reuseIdentifier:CellIdentifier];

    NSArray *data = indexPath.section == kAddFilterTableSectionSourceType ? _filterStack.sources : _filterStack.possibleNextFilters;

    FilterDescriptor *d = [data objectAtIndex:indexPath.row];

    cell.textLabel.text = [d displayName];

    if ([d.filter isKindOfClass:[SourceFilter class]])

        cell.detailTextLabel.text = nil;

    else

        cell.detailTextLabel.text = [d name];

    return cell;

}

#pragma mark - Table view delegate

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath

{

    NSArray *data = indexPath.section == kAddFilterTableSectionSourceType ? _filterStack.sources : _filterStack.possibleNextFilters;

    FilterDescriptor *d = [data objectAtIndex:indexPath.row];

    CIFilter *filter = d.filter;

    if ([filter isKindOfClass:[SourcePhotoFilter class]])

    {

        if (self.imagePickerNavigationController == nil)

        {

            self.imagePickerNavigationController = [[UIImagePickerController alloc] init];

            self.imagePickerNavigationController.delegate = self;

        }

        if ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPad)

        {

            if (self.imagePickerPopoverController == nil)

                self.imagePickerPopoverController = [[UIPopoverController alloc]

                                                     initWithContentViewController:self.imagePickerNavigationController];

            [self.imagePickerPopoverController presentPopoverFromRect:self.navigationController.view.bounds

                                                               inView:self.view

                                             permittedArrowDirections:UIPopoverArrowDirectionAny

                                                             animated:YES];

        }

        else

            [self.navigationController presentViewController:self.imagePickerNavigationController animated:YES completion:nil];

        return;

    }

    [self.filterStack appendFilter:filter];

    [self.delegate didAddFilter:filter];

    [self.tableView reloadData];

}

#pragma mark UIImagePickerViewDelegate

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info

{

    NSURL *assetURL = [info objectForKey:UIImagePickerControllerReferenceURL];

    ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];

    [library assetForURL:assetURL

             resultBlock:^(ALAsset *__strong asset) {

                 // we need to be defensive

                 if (asset)

                 {

                     ALAssetRepresentation *rep = [asset defaultRepresentation];

                     CGImageRef cgimage = [rep fullScreenImage];

                     //CGImageRef cgimage = [rep CGImageWithOptions:@{}];

                     //NSLog(@"picked %@ longsize %lld  cgimage=%zux%zu", [rep filename], [rep size], CGImageGetWidth(cgimage), CGImageGetHeight(cgimage));

                     if (cgimage)

                     {

                         CIImage* ciimage = [CIImage imageWithCGImage:cgimage];

                         CIFilter* filter = [CIFilter filterWithName:@"SourcePhotoFilter"];

                         [filter setValue:ciimage forKey:kCIInputImageKey];

                         [self.filterStack appendFilter:filter];

                         [self.delegate didAddFilter:filter];

                         [self.tableView reloadData];

                         //CGImageRelease(cgimage);

                     }

                     else

                         ;//handler(nil);

                 }

                 else

                     ;//handler([NSError errorWithDomain:[[NSBundle mainBundle] bundleIdentifier] code:-1 userInfo:nil]);

                 if (self.imagePickerPopoverController)

                 {

                     [self.imagePickerPopoverController dismissPopoverAnimated:YES];

                     self.imagePickerPopoverController = nil;

                 }

             }

            failureBlock:^(NSError *__strong error) {

                ;//handler(error);

            }];

}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker

{

    if (self.imagePickerPopoverController)

    {

        [self.imagePickerPopoverController dismissPopoverAnimated:YES];

        self.imagePickerPopoverController = nil;

    }

    else

        [self.navigationController dismissViewControllerAnimated:YES completion:nil];

    [self.tableView deselectRowAtIndexPath:[self.tableView indexPathForSelectedRow] animated:YES];

}

@end