//---------------------------------------------------------------------------------------
// Copyright (c) 2001-2012 by PDFTron Systems Inc. All Rights Reserved.
// Consult legal.txt regarding legal and license information.
//---------------------------------------------------------------------------------------

#import <OBJC/PDFNetOBJC.h>
#import <Foundation/Foundation.h>

int main(int argc, char *argv[])
{
	int ret = 0;
	[PDFNet Initialize: 0];

	// Sample 1 - Split a PDF document into multiple pages
	@try
	{
        NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
		NSLog(@"_______________________________________________");
		NSLog(@"Sample 1 - Split a PDF document into multiple pages...");
		NSLog(@"Opening the input pdf...");
		PDFDoc *in_doc = [[[PDFDoc alloc] initWithFilepath: @"../../TestFiles/newsletter.pdf"] autorelease];
		[in_doc InitSecurityHandler];

		int page_num = [in_doc GetPageCount];
        int i;
		for (i=1; i<=page_num; ++i)
		{
			PDFDoc *new_doc = [[[PDFDoc alloc] init] autorelease];
            NSString *output_file = [@"../../TestFiles/Output/" stringByAppendingFormat: @"newsletter_split_page_%d.pdf", i]; 
			[new_doc InsertPages: 0 sourceDoc: in_doc startPage: i endPage: i flag: e_pd_none];
			[new_doc SaveToFile: output_file flags: e_remove_unused];
			NSLog(@"Done. Result saved in newsletter_split_page_%d.pdf", i);
		}
        [pool release];
	}
	@catch(NSException *e)
	{
		NSLog(@"%@", [e reason]);
		ret = 1;
	}

	// Sample 2 - Merge several PDF documents into one
	@try
	{
        NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
		NSLog(@"_______________________________________________");
		NSLog(@"Sample 2 - Merge several PDF documents into one...");
		PDFDoc *new_doc = [[[PDFDoc alloc] init] autorelease];
		[new_doc InitSecurityHandler];

		int page_num = 15;
        int i;
		for (i=1; i<=page_num; ++i)
		{
            NSString *input_file = [@"../../TestFiles/Output/" stringByAppendingFormat: @"newsletter_split_page_%d.pdf", i]; 
			NSLog(@"Opening newsletter_split_page_%d.pdf", i);
            PDFDoc *in_doc = [[[PDFDoc alloc] initWithFilepath: input_file] autorelease];
			[new_doc InsertPages: i sourceDoc: in_doc startPage: 1 endPage: [in_doc GetPageCount] flag: e_pd_none];
		}
		[new_doc SaveToFile: @"../../TestFiles/Output/newsletter_merge_pages.pdf" flags: e_remove_unused];
		NSLog(@"Done. Result saved in newsletter_merge_pages.pdf");
        
        [pool release];
	}
	@catch(NSException *e)
	{
		NSLog(@"%@", [e reason]);
		ret = 1;
	}


	// Sample 3 - Delete every second page
	@try	
	{
        NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
		NSLog(@"_______________________________________________");
		NSLog(@"Sample 3 - Delete every second page...");
		NSLog(@"Opening the input pdf...");
		PDFDoc *in_doc = [[[PDFDoc alloc] initWithFilepath: @"../../TestFiles/newsletter.pdf"] autorelease];
		[in_doc InitSecurityHandler];
		
		int page_num = [in_doc GetPageCount];
		while (page_num>=1)
		{
			PageIterator *itr = [in_doc GetPageIterator: page_num];
			[in_doc PageRemove: itr];
			page_num -= 2;
		}		
		
		[in_doc SaveToFile: @"../../TestFiles/Output/newsletter_page_remove.pdf" flags: 0];
		NSLog(@"Done. Result saved in newsletter_page_remove.pdf...");
        
        [pool release];
	}
	@catch(NSException *e)
	{
		NSLog(@"%@", [e reason]);
		ret = 1;
	}
	
	// Sample 4 - Inserts a page from one document at different 
	// locations within another document
	@try
	{	 
        NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
		NSLog(@"_______________________________________________");
		NSLog(@"Sample 4 - Insert a page at different locations...");
		NSLog(@"Opening the input pdf...");
		
		PDFDoc *in1_doc = [[[PDFDoc alloc] initWithFilepath: @"../../TestFiles/newsletter.pdf"] autorelease];
		[in1_doc InitSecurityHandler];

		PDFDoc *in2_doc = [[[PDFDoc alloc] initWithFilepath: @"../../TestFiles/fish.pdf"] autorelease];
		[in2_doc InitSecurityHandler];
		
		PageIterator *src_page = [in2_doc GetPageIterator: 1];
		int page_num = [in1_doc GetPageCount];
        int i;
		for (i=1; i<page_num; i+=3) 
		{
			PageIterator *it = [in1_doc GetPageIterator: i];
			[in1_doc PageInsert: it page: [src_page Current]];
		}
		
		[in1_doc SaveToFile: @"../../TestFiles/Output/newsletter_page_insert.pdf" flags: 0];
		NSLog(@"Done. Result saved in newsletter_page_insert.pdf...");
        
        [pool release];
	}@catch(NSException *e)
	{
		NSLog(@"%@", [e reason]);
		ret = 1;
	}

	// Sample 5 - Replicate pages within a single document
	@try	
	{
        NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
        NSLog(@"_______________________________________________");
		NSLog(@"Sample 5 - Replicate pages within a single document...");
		NSLog(@"Opening the input pdf...");
		PDFDoc *doc = [[[PDFDoc alloc] initWithFilepath: @"../../TestFiles/newsletter.pdf"] autorelease];
		[doc InitSecurityHandler];
		
		// Replicate the cover page three times (copy page #1 and place it before the 
		// seventh page in the document page sequence)
		Page *cover = [doc GetPage: 1];
		PageIterator *p7 = [doc GetPageIterator: 7];
		[doc PageInsert: p7 page: cover];
        [doc PageInsert: p7 page: cover];
		[doc PageInsert: p7 page: cover];
		
		// Replicate the cover page two more times by placing it before and after
		// existing pages.
		[doc PagePushFront: cover];
		[doc PagePushBack: cover];
		
		[doc SaveToFile: @"../../TestFiles/Output/newsletter_page_clone.pdf" flags: 0];
		NSLog(@"Done. Result saved in newsletter_page_clone.pdf...");
        
        [pool release];
	}
    @catch(NSException *e)
	{
		NSLog(@"%@", [e reason]);
		ret = 1;
	}
	
	// Sample 6 - Use ImportPages() in order to copy multiple pages at once 
	// in order to preserve shared resources between pages (e.g. images, fonts, 
	// colorspaces, etc.)
	@try
	{
        NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
		NSLog(@"_______________________________________________");
		NSLog(@"Sample 6 - Preserving shared resources using ImportPages...");
		NSLog(@"Opening the input pdf...");
		PDFDoc *in_doc = [[[PDFDoc alloc] initWithFilepath: @"../../TestFiles/newsletter.pdf"] autorelease];
		[in_doc InitSecurityHandler];

		PDFDoc *new_doc = [[[PDFDoc alloc] init] autorelease];
		
		VectorPage *copy_pages = [[[VectorPage alloc] init] autorelease];
        PageIterator *itr;
		for (itr=[in_doc GetPageIterator: 1]; [itr HasNext]; [itr Next])
		{
			[copy_pages add: [itr Current]];
		}
		
		VectorPage *imported_pages = [new_doc ImportPages: copy_pages import_bookmarks: NO];
        int i;
		for (i=0; i<[imported_pages size]; ++i)
		{
			[new_doc PagePushFront: [imported_pages get: i]]; // Order pages in reverse order. 
			// Use PagePushBack() if you would like to preserve the same order.
		}		
		
		[new_doc SaveToFile: @"../../TestFiles/Output/newsletter_import_pages.pdf" flags: 0];
		NSLog(@"Done. Result saved in newsletter_import_pages.pdf...");
        
		NSLog(@"Note that the output file size is less than half the size of the file produced using individual page copy operations between two documents");
        
        [pool release];
	}
    @catch(NSException *e)
	{
		NSLog(@"%@", [e reason]);
		ret = 1;
	}

    return ret;
}