/*

     File: RecipeDetailViewController.m 

 Abstract: The UITableViewController for displaying the details of a Recipe 

  Version: 1.2 

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 */ 

#import "RecipeDetailViewController.h"

#import "RecipesController.h"

#import "Recipe.h"

#import "InstructionsViewController.h"

#import "RecipePhotoViewController.h"

@interface RecipeDetailViewController ()

@property (nonatomic, strong) IBOutlet UIView *tableHeaderView;

@property (nonatomic, strong) IBOutlet UIButton *photoButton;

@property (nonatomic, strong) IBOutlet UILabel *nameLabel;

@property (nonatomic, strong) Recipe *recipe;

- (IBAction)showPhoto;

@end

@implementation RecipeDetailViewController

// Define constants for the table view sections

enum {

    INGREDIENTS_SECTION, // 0

    INSTRUCTIONS_SECTION, // 1

    TotalNumberOfSections // 2

};

// Custom initialize that makes the recipe available to this table view controller

-(RecipeDetailViewController*)initWithRecipe:(Recipe*)aRecipe;

{

    self = [super initWithStyle:UITableViewStyleGrouped];

    if(self){

        self.recipe = aRecipe;

        self.navigationItem.title = @"Recipe";

    }

    return self;

}

// Release ownership.

#pragma mark -

#pragma mark UIViewController

// Release ownership.

- (void) viewDidUnload;

{

    self.tableHeaderView = nil;

    self.photoButton = nil;

    self.nameLabel = nil;

}

- (void)viewDidLoad {

    if (_tableHeaderView == nil) {

        // Load the header view that shows the recipe name and thumbnail

        [[NSBundle mainBundle] loadNibNamed:@"DetailHeaderView" owner:self options:nil];

        _tableHeaderView.backgroundColor = [UIColor groupTableViewBackgroundColor];

        // Set it onto the tables header view property

        self.tableView.tableHeaderView = _tableHeaderView;

        self.tableView.allowsSelectionDuringEditing = YES;

    }

}

- (void)viewWillAppear:(BOOL)animated {

    [super viewWillAppear:animated];

    // to update recipe type and ingredients on return

    [self.tableView reloadData]; 

    // Skin the photo button with the recipe thumbnail - displayed up in the header view

    [_photoButton setImage:_recipe.thumbnailImage forState:UIControlStateNormal];

    // Set the header view text

    _nameLabel.text = _recipe.name;

    // Set the recipe name as the nav bar title

    self.title = _recipe.name;

    // Provide a back button to go back to the recipes

    UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:@"Recipe" style:UIBarButtonItemStylePlain target:nil action:nil];

    self.navigationItem.backBarButtonItem = backButton;

}

// Support all orientations except portrait-upside down

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {

    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);

}

#pragma mark -

#pragma mark UITableView Delegate/Datasource

// Provide the architecture with the number of sections in this table view. 2 for this sample.

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {

    return TotalNumberOfSections;

}

// Define a title for the argument section

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

    switch (section) {

            // Only define a title for the ingredients section

        case INGREDIENTS_SECTION:

            return @"Ingredients";

        default:

            return nil;

    }

}

// Provide the architecture with the number of rows for the argument section

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

    switch (section) {

        case INSTRUCTIONS_SECTION:

            return 1;

        case INGREDIENTS_SECTION:

            return [_recipe.ingredients count];

        default:

            return 0;

    }

}

// Build the cell for the argument cell index.

// See the TableViewSuite sample for more information about creating table view cells.

- (UITableViewCell *)ingredientsCellAtIndex:(NSUInteger)ingredientIdx forTableView:(UITableView *)tableView {

        static NSString *IngredientsCellIdentifier = @"IngredientsCell";

        const int AMOUNT_TAG =  1;

        UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:IngredientsCellIdentifier];

        if (cell == nil) {

            cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:IngredientsCellIdentifier];

            UILabel *amountLabel = [[UILabel alloc] initWithFrame:CGRectZero];

            [amountLabel setAutoresizingMask:UIViewAutoresizingFlexibleLeftMargin];

            amountLabel.tag = AMOUNT_TAG;

            amountLabel.textColor = [UIColor colorWithRed:50.0/255.0 green:79.0/255.0 blue:133.0/255.0 alpha:1.0];

            amountLabel.highlightedTextColor = [UIColor whiteColor];

            [cell.contentView insertSubview:amountLabel aboveSubview:cell.textLabel];

            amountLabel.backgroundColor = [UIColor clearColor];

        }

        UILabel *amountLabel = (UILabel *)[cell viewWithTag:AMOUNT_TAG];

        NSDictionary *ingredients = [_recipe.ingredients objectAtIndex:ingredientIdx];

        cell.textLabel.text = [ingredients objectForKey:@"name"];

        amountLabel.text = [ingredients objectForKey:@"amount"];        

        CGSize desiredSize = [amountLabel sizeThatFits:CGSizeMake(160.0,32.0)];

        CGRect computedFrame = {CGPointMake(CGRectGetMaxX(cell.contentView.bounds) - desiredSize.width - 10.0, floorf(CGRectGetMidY(cell.contentView.bounds) - desiredSize.height / 2.0)), desiredSize};

        amountLabel.frame = computedFrame;

        return cell;

}

// if the argument cell index path (section, row) is within the ingredient section, return that cell

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

    if (indexPath.section == INGREDIENTS_SECTION) {

        return [self ingredientsCellAtIndex:indexPath.row forTableView:tableView];

    }

    static NSString *MyIdentifier = @"MyIdentifier";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:MyIdentifier];

    if (cell == nil) {

        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:MyIdentifier];

    }

    NSString *text = nil;

    switch (indexPath.section) {

        case INSTRUCTIONS_SECTION: // instructions

            cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;

            text = @"Instructions";

            break;

        default:

            cell.accessoryType = UITableViewCellAccessoryNone;

            break;

    }

    if (text) {

        cell.textLabel.text = text;

    }

    return cell;

}

- (NSIndexPath *)tableView:(UITableView *)tableView willSelectRowAtIndexPath:(NSIndexPath *)indexPath {

    // Don't allow ingredients to be selected

    NSInteger section = indexPath.section;

    if (section == INGREDIENTS_SECTION) {

        [tableView deselectRowAtIndexPath:indexPath animated:YES];

        return nil; 

    }

    return indexPath;

}

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

    // If the intructions section is tapped, navigate to the instructions view controller

    if (indexPath.section == INSTRUCTIONS_SECTION) {

        InstructionsViewController *nextViewController = [[InstructionsViewController alloc] initWithNibName:@"RecipeInstructionsView" bundle:nil];

        // pass the recipe to the instructions view controller

        ((InstructionsViewController *)nextViewController).recipe = _recipe;

        [self.navigationController pushViewController:nextViewController animated:YES];

    }

}

// Touch handler for tapping the photo in the header view. 

- (IBAction)showPhoto {

    // Navigate to the recipe photo view controller to show a large photo for the recipe.

    RecipePhotoViewController *recipePhotoViewController = [[RecipePhotoViewController alloc] init];

    recipePhotoViewController.recipe = _recipe;

    [self.navigationController pushViewController:recipePhotoViewController animated:YES];

}

@end