//
//  KMFileAttribute.m
//  PDF to Word
//
//  Created by wangshuai on 13-8-14.
//  Copyright (c) 2013年 kdanmobile. All rights reserved.
//

#import "KMFileAttribute.h"
#import <Quartz/Quartz.h>

@implementation KMFileAttribute
@synthesize filePath = _filePath;
@synthesize bAllPage = _bAllPage;
@synthesize selectPages = _selectPages;
@synthesize pagesString = _pagesString;
@synthesize isLocked = _isLocked;
@synthesize password = _password;

- (id)init
{
    self = [super init];
    if (self) {
        _bAllPage = YES;
        _isLocked = NO;
        _password = nil;
        _pagesString = @"";
    }
    return self;
}

- (void)dealloc {}

- (NSMutableArray*)selectPages
{
    [self isInvalidString:_pagesString];
    if (!_bAllPage) {
        [self QuickSort:_selectPages StartIndex:0 EndIndex:[_selectPages count]-1];
    }
    return _selectPages;
}

- (BOOL)isInvalidString:(NSString*)text
{
    PDFDocument * document;
    if (_myPDFDocument) {
        document = self.myPDFDocument;
    } else {
       document = [[PDFDocument alloc] initWithURL:[NSURL fileURLWithPath:self.filePath]];
    }
    
    NSInteger pageNumber = [document pageCount];
    if (_bAllPage) {
        _selectPages = [[NSMutableArray alloc] init];
        for (int i=1; i<=pageNumber; i++) {
            [_selectPages addObject:[NSNumber numberWithInteger:i]];
        }
        return NO;
    }
    NSMutableArray *pageNumbers = [[NSMutableArray alloc] init];
    BOOL isInvalid = NO;
    unichar c;
    for (int i=0; i<[text length]; i++) {
        c = [text characterAtIndex:i];
        if (c!='0'&&c!='1'&&c!='2'&&c!='3'&&c!='4'&&c!='5'&&c!='6'&&c!='7'&&c!='8'&&c!='9'&&c!=','&&c!='-') {
            isInvalid = YES;
            break;
        }else{
            isInvalid = NO;
        }
    }
    if (!isInvalid) {
        NSArray *array = [text componentsSeparatedByString:@","];
        for(NSString *s in array){
            if ([s isEqualToString:@""]) {
                isInvalid = YES;
                break;
            }else{
                NSArray *pages = [s componentsSeparatedByString:@"-"];
                if ([pages count]>2) {
                    isInvalid = YES;
                    break;
                }else if([pages count]==1){
                    NSString *p = [pages objectAtIndex:0];
                    if ([p isEqualToString:@""]||[p intValue]>pageNumber||[p integerValue]==0) {
                        isInvalid = YES;
                        break;
                    }else{
                        BOOL isEqual = NO;
                        for(NSNumber *pageNumber in pageNumbers){
                            if ([pageNumber integerValue]==[p integerValue]) {
                                isEqual = YES;
                                isInvalid = YES;
                                break;
                            }
                        }
                        if (!isEqual) {
                            [pageNumbers addObject:[NSNumber numberWithInteger:[p integerValue]]];
                        }
                    }
                }else if([pages count]==2){
                    NSString *p1 = [pages objectAtIndex:0];
                    NSString *p2 = [pages objectAtIndex:1];
                    if ([p1 isEqualToString:@""]||[p2 isEqualToString:@""]||
                        [p1 intValue]>=[p2 intValue]||[p2 intValue]>pageNumber||[p1 integerValue]==0) {
                        isInvalid = YES;
                        break;
                    }else{
                        BOOL isEqual = NO;
                        for (int i=[p1 intValue]; i<=[p2 intValue]; i++) {
                            for(NSNumber *pageNumber in pageNumbers){
                                if ([pageNumber integerValue]==i) {
                                    isEqual = YES;
                                    isInvalid = YES;
                                    break;
                                }
                            }
                        }
                        if (!isEqual) {
                            for (int i=[p1 intValue]; i<=[p2 intValue]; i++) {
                                [pageNumbers addObject:[NSNumber numberWithInteger:i]];
                            }
                        }
                    }
                }
            }
        }
    }
    if ([text length]==0) {
        isInvalid = YES;
    }
    if (isInvalid) {
        _selectPages = nil;
    }else{
        _selectPages = pageNumbers;
    }
    return isInvalid;
}

-(void)QuickSort:(NSMutableArray *)list StartIndex:(NSInteger)startIndex EndIndex:(NSInteger)endIndex{
    
    if(startIndex >= endIndex)return;
    
    NSNumber * temp = [list objectAtIndex:startIndex];
    NSInteger tempIndex = startIndex;
    
    for(NSInteger i = startIndex + 1 ; i <= endIndex ; i++){
        
        NSNumber *t = [list objectAtIndex:i];
        
        if([temp intValue] > [t intValue]){
            
            tempIndex = tempIndex + 1;
            
            [list exchangeObjectAtIndex:tempIndex withObjectAtIndex:i];
            
        }
        
    }
    
    [list exchangeObjectAtIndex:tempIndex withObjectAtIndex:startIndex];
    [self QuickSort:list StartIndex:startIndex EndIndex:tempIndex-1];
    [self QuickSort:list StartIndex:tempIndex+1 EndIndex:endIndex];
}

/* give our representation to the image browser */
- (id)imageRepresentation
{
	return self.filePath;
}

/* use the absolute filepath as identifier */
- (NSString *)imageUID
{
    return self.filePath;
}

- (NSString*)imageTitle
{
    return [[self.filePath lastPathComponent] stringByDeletingPathExtension];
}

@end