/*

 * Hedgewars-iOS, a Hedgewars port for iOS devices

 * Copyright (c) 2009-2012 Vittorio Giovara <vittorio.giovara@gmail.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; version 2 of the License

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.

 */

#import "EditableCellView.h"

#import "UITableViewCell+FindTable.h"

@implementation EditableCellView

@synthesize delegate, textField, titleLabel, minimumCharacters, maximumCharacters, respectEditing, oldValue;

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {

    if ((self = [super initWithStyle:style reuseIdentifier:reuseIdentifier])) {

        delegate = nil;

        textField = [[UITextField alloc] initWithFrame:CGRectZero];

        textField.backgroundColor = [UIColor clearColor];

        textField.delegate = self;

        textField.clearButtonMode = UITextFieldViewModeWhileEditing;

        textField.clearsOnBeginEditing = NO;

        textField.returnKeyType = UIReturnKeyDone;

        textField.adjustsFontSizeToFitWidth = YES;

        textField.minimumFontSize = 9;

        textField.userInteractionEnabled = YES;

        textField.font = [UIFont boldSystemFontOfSize:[UIFont labelFontSize]];

        [textField addTarget:self action:@selector(save:) forControlEvents:UIControlEventEditingDidEndOnExit];

        [self.contentView addSubview:textField];

        titleLabel = [[UILabel alloc] init];

        titleLabel.textAlignment = NSTextAlignmentLeft;

        titleLabel.backgroundColor = [UIColor clearColor];

        titleLabel.font = [UIFont boldSystemFontOfSize:[UIFont labelFontSize]];

        [self.contentView addSubview:titleLabel];

        minimumCharacters = 1;

        maximumCharacters = 64;

        respectEditing = NO;

        oldValue = nil;

    }

    return self;

}

- (void)layoutSubviews {

    [super layoutSubviews];

    CGRect contentRect = self.contentView.bounds;

    CGFloat boundsX = contentRect.origin.x;

    int offset = 0;

    int skew = 0;

    if (self.imageView != nil)

        offset += self.imageView.frame.size.width;

    if ([self.titleLabel.text length] == 0)

        titleLabel.frame = CGRectZero;

    else {

        titleLabel.frame = CGRectMake(boundsX+offset+10, 10, 100, [UIFont labelFontSize] + 4);

        offset += 100;

        skew +=2;

    }

    textField.frame = CGRectMake(boundsX+offset+10, skew+10, 300, [UIFont labelFontSize] + 4);

}

- (void)setSelected:(BOOL)selected animated:(BOOL)animated {

    [super setSelected:selected animated:animated];

    // Configure the view for the selected state

}

#pragma mark -

#pragma mark textField delegate

// limit the size of the field to 64 characters like in original frontend

- (BOOL)textField:(UITextField *)aTextField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {

    return !([aTextField.text length] > self.maximumCharacters && [string length] > range.length);

}

// allow editing only if delegate is set and conformant to protocol, and if editableOnlyWhileEditing

- (BOOL)textFieldShouldBeginEditing:(UITextField *)aTextField {

    return (delegate != nil) &&

           [delegate respondsToSelector:@selector(saveTextFieldValue:withTag:)] &&

           (respectEditing) ? [self findTable].editing : YES;

}

// the textfield is being modified, update the navigation controller

- (void)textFieldDidBeginEditing:(UITextField *)aTextField{

    // don't interact with table below

    [self findTable].scrollEnabled = NO;

    self.oldValue = self.textField.text;

    UIBarButtonItem *cancelButton = [[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"Cancel",@"")

                                                                     style:UIBarButtonItemStylePlain

                                                                    target:self

                                                                    action:@selector(cancel:)];

    [(UITableViewController *)delegate navigationItem].leftBarButtonItem = cancelButton;

    UIBarButtonItem *saveButton = [[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"Save",@"")

                                                                     style:UIBarButtonItemStyleDone

                                                                    target:self

                                                                    action:@selector(save:)];

    [(UITableViewController *)delegate navigationItem].rightBarButtonItem = saveButton;

}

/* with this a field might remain in editing status even if the view moved;

   use method below instead that allows some more interaction

// don't accept 0-length strings

- (BOOL)textFieldShouldEndEditing:(UITextField *)aTextField {

    return ([aTextField.text length] > 0);

}

*/

- (BOOL)textFieldShouldReturn:(UITextField *)aTextField {

    return ([aTextField.text length] >= self.minimumCharacters);

}

// the textfield has been modified, tell the delegate to do something

- (void)textFieldDidEndEditing:(UITextField *)aTextField {

    // this forces a save when user selects a new field

    if ([self.textField.text isEqualToString:self.oldValue] == NO)

        [self save:aTextField];

    // restores default behaviour on caller

    [self findTable].scrollEnabled = YES;

    [(UITableViewController *)delegate navigationItem].leftBarButtonItem = [(UITableViewController *)delegate navigationItem].backBarButtonItem;

    [(UITableViewController *)delegate navigationItem].rightBarButtonItem = nil;

}

#pragma mark -

#pragma mark instance methods

// the user wants to show the keyboard

- (void)replyKeyboard {

    [self.textField becomeFirstResponder];

}

// the user pressed cancel so hide keyboard

- (void)cancel:(id)sender {

    // reverts any changes and performs a fake save for removing the keyboard

    self.textField.text = self.oldValue;

    [self save:sender];

}

// send the value to the delegate (called before textFieldDidEndEditing)

- (void)save:(id)sender {

    if (delegate == nil || [delegate respondsToSelector:@selector(saveTextFieldValue:withTag:)] == NO)

        return;

    // don't save if the textfield is invalid

    if ([self textFieldShouldReturn:textField] == NO)

        return;

    [delegate saveTextFieldValue:self.textField.text withTag:self.tag];

    [self.textField resignFirstResponder];

    self.oldValue = nil;

}

// when field is editable only when the tableview is editable, resign responder when exiting editing mode

- (void)willTransitionToState:(UITableViewCellStateMask)state {

    if (respectEditing && state == UITableViewCellStateDefaultMask)

        [self save:nil];

    [super willTransitionToState:state];

}

@end