/*

 Generic controller to select a single item from a list of options

 Copyright 2013 Thincast Technologies GmbH, Author: Martin Fleisz

 This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. 

 If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.

 */

#import "EditorSelectionController.h"

#import "ConnectionParams.h"

#import "OrderedDictionary.h"

@interface EditorSelectionController (Private)

- (OrderedDictionary*)selectionForIndex:(int)index;

@end

@implementation EditorSelectionController

- (id)initWithConnectionParams:(ConnectionParams*)params entries:(NSArray *)entries selections:(NSArray *)selections

{

    self = [super initWithStyle:UITableViewStyleGrouped];

    if (self)

    {

        _params = [params retain];

        _entries = [entries retain];

        _selections = [selections retain];

        // allocate and init current selections array

        _cur_selections = [[NSMutableArray alloc] initWithCapacity:[_entries count]];        

        for (int i = 0; i < [entries count]; ++i)

        {

            NSString* entry = [entries objectAtIndex:i];            

            if([_params hasValueForKeyPath:entry])

            {

                NSUInteger idx = [(OrderedDictionary*)[selections objectAtIndex:i] indexForValue:[NSNumber numberWithInt:[_params intForKeyPath:entry]]];

                [_cur_selections addObject:[NSNumber numberWithInt:(idx != NSNotFound ? idx : 0)]];

            }

            else

                [_cur_selections addObject:[NSNumber numberWithInt:0]];

        }

    }

    return self;

}

- (void)didReceiveMemoryWarning

{

    // Releases the view if it doesn't have a superview.

    [super didReceiveMemoryWarning];

    // Release any cached data, images, etc that aren't in use.

    [_params autorelease];

    [_entries autorelease];

    [_selections autorelease];    

    [_cur_selections autorelease];

}

#pragma mark - View lifecycle

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation

{

    // Return YES for supported orientations

    return YES;

}

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView

{

    // Return the number of sections.

    return [_entries count];

}

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

{

    // Return the number of rows in the section.

    return [[self selectionForIndex:section] count];

}

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

{

    UITableViewCell *cell = [self tableViewCellFromIdentifier:TableCellIdentifierMultiChoice];

    // get selection

    OrderedDictionary* selection = [self selectionForIndex:[indexPath section]];

    // set cell properties

	[[cell textLabel] setText:[selection keyAtIndex:[indexPath row]]];

	// set default checkmark

	if([indexPath row] == [[_cur_selections objectAtIndex:[indexPath section]] intValue])

		[cell setAccessoryType:UITableViewCellAccessoryCheckmark];

	else

		[cell setAccessoryType:UITableViewCellAccessoryNone];

    return cell;

}

#pragma mark - Table view delegate

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

{

	// has selection change?

    int cur_selection = [[_cur_selections objectAtIndex:[indexPath section]] intValue];

	if([indexPath row] != cur_selection)

	{

		[tableView deselectRowAtIndexPath:indexPath animated:NO];

		NSIndexPath* oldIndexPath = [NSIndexPath indexPathForRow:cur_selection inSection:[indexPath section]];

		// clear old checkmark

		UITableViewCell* old_sel_cell = [tableView cellForRowAtIndexPath:oldIndexPath];

		old_sel_cell.accessoryType = UITableViewCellAccessoryNone;

		// set new checkmark

		UITableViewCell* new_sel_cell = [tableView cellForRowAtIndexPath:indexPath];

		new_sel_cell.accessoryType = UITableViewCellAccessoryCheckmark;

        // get value from selection dictionary

        OrderedDictionary* dict = [self selectionForIndex:[indexPath section]];

        int sel_value = [[dict valueForKey:[dict keyAtIndex:[indexPath row]]] intValue];

		// update selection index and params value

        [_cur_selections replaceObjectAtIndex:[indexPath section] withObject:[NSNumber numberWithInt:[indexPath row]]];

        [_params setInt:sel_value forKeyPath:[_entries objectAtIndex:[indexPath section]]];

    }    

}

#pragma mark - Convenience functions

- (OrderedDictionary*)selectionForIndex:(int)index

{

    return (OrderedDictionary*)[_selections objectAtIndex:index];

}

@end