// Copyright (C) 2003-2026, Foxit Software Inc..
// All Rights Reserved.
//
// http://www.foxitsoftware.com
//
// The following code is copyrighted and contains proprietary information and trade secrets of Foxit Software Inc..
// You cannot distribute any part of Foxit PDF SDK to any third party or general public,
// unless there is a separate license agreement with Foxit Software Inc. which explicitly grants you such rights.
//
// This file contains an example to demonstrate how to use Foxit PDF SDK to extract attached files from PDF files and
// add files as attachments to PDF files.

#include "FSPDFObjC.h"

NSString *input_path = @"../input_files/";
NSString *output_path = @"../output_files/";
NSString *content = @"";

NSString *sn = @"bPxThFlBAYifO3yiW0C51bKbjPap1zHaf5aG5sX378TjFvB7Q0802A==";
NSString *key = @"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";

// The results are displayed in the txt file.
void textOutput(NSString *str) {
    content = [[NSString alloc] initWithFormat:@"%@%@\n", content, str];
}

NSString *DateTimeToString(const FSDateTime *datetime) {
    NSString *s_datetime = [[NSString alloc] initWithFormat:@"%d/%d/%d-%d:%d:%d %@%d:%d", datetime.year, datetime.month, datetime.day, datetime.hour, datetime.minute, datetime.second, datetime.utc_hour_offset > 0 ? @"+" : @"-", datetime.utc_hour_offset, datetime.utc_minute_offset];
    return s_datetime;
}

int main(int argc, const char *argv[]) {
    @autoreleasepool {
        NSString *output_directory = [[NSString alloc] initWithFormat:@"%@%@", output_path, @"attachment/"];
        NSString *input_file = [[NSString alloc] initWithFormat:@"%@%@", input_path, @"attachment.pdf"];
        NSString *file_info = [[NSString alloc] initWithFormat:@"%@%@", output_directory, @"attachment_info.txt"];
        NSFileManager *fileManager = [NSFileManager defaultManager];
        BOOL isDir = NO;
        if ([fileManager fileExistsAtPath:output_directory isDirectory:&isDir]) {
            if (!isDir) {
                NSError *error = nil;
                if (![fileManager removeItemAtPath:output_directory error:&error] || error) {
                    return -1;
                }
                if (![fileManager createDirectoryAtPath:output_directory withIntermediateDirectories:YES attributes:nil error:&error] || error) {
                    return -1;
                }
            }
        } else {
            NSError *error = nil;
            if (![fileManager createDirectoryAtPath:output_directory withIntermediateDirectories:YES attributes:nil error:&error] || error) {
                return -1;
            }
        }

        // Initialize library
        FSErrorCode errorCode = [FSLibrary initialize:sn key:key];
        if (errorCode != FSErrSuccess) {
            NSLog(@"Library Initialize Error: %ld", errorCode);
            return -1;
        }

        @try {
            FSPDFDoc *doc = [[FSPDFDoc alloc] initWithPath:input_file];
            FSErrorCode errorCode = [doc load:@""];
            if (errorCode != FSErrSuccess) {
                NSLog(@"The Doc [%@] Error: %ld\n", input_file, errorCode);
                return 1;
            }
            {
                // Get information of attachments.
                FSAttachments *attachment = [[FSAttachments alloc] initWithDoc:doc nametree:[[FSPDFNameTree alloc] init]];
                int count = [attachment getCount];
                for (int i = 0; i < count; i++) {
                    NSString *key = [attachment getKey:i];
                    textOutput([[NSString alloc] initWithFormat:@"Key:\t\t%@\r", key]);

                    FSFileSpec *file_spec = [attachment getEmbeddedFile:key];
                    if (![file_spec isEmpty]) {
                        NSString *name = [file_spec getFileName];
                        textOutput([[NSString alloc] initWithFormat:@"Name:\t\t%@\r", name]);
                        textOutput([[NSString alloc] initWithFormat:@"Size:\t\t%lld\r", [file_spec getFileSize]]);
                        textOutput([[NSString alloc] initWithFormat:@"Is embedded:\t%@\r", [file_spec isEmbedded] ? @"true" : @"false"]);
                        textOutput([[NSString alloc] initWithFormat:@"Creation time:\t%@\r", DateTimeToString([file_spec getCreationDateTime])]);
                        textOutput([[NSString alloc] initWithFormat:@"Modified time:\t%@\r", DateTimeToString([file_spec getModifiedDateTime])]);
                        textOutput(@"\r");

                        if ([file_spec isEmbedded]) {
                            NSString *exFilePath = [[NSString alloc] initWithFormat:@"%@%@", output_directory, name];
                            bool bExportStatus = [file_spec exportToFile:exFilePath];
                            NSLog(@"%@ ExportToFile %@", name, bExportStatus ? @"successful" : @"failed");
                        }
                    }
                }
            }
            {
                // Remove all attachments
                FSAttachments *attachment = [[FSAttachments alloc] initWithDoc:doc nametree:[[FSPDFNameTree alloc] init]];
                [attachment removeAllEmbeddedFiles];
                NSString *newPdf = [[NSString alloc] initWithFormat:@"%@attachment_remove.pdf", output_directory];
                [doc saveAs:newPdf save_flags:FSPDFDocSaveFlagNoOriginal];
                NSLog(@"Remove all attachments.");
            }
            {
                NSString *text_path = [[NSString alloc] initWithFormat:@"%@AboutFoxit.pdf", input_path];
                FSAttachments *attachment = [[FSAttachments alloc] initWithDoc:doc nametree:[[FSPDFNameTree alloc] init]];
                // Add new attachment to PDF document.
                [attachment addFromFilePath:@"OriginalAttachmentsInfo" file_path:text_path];
                NSString *newPdf = [[NSString alloc] initWithFormat:@"%@attachment_add.pdf", output_directory];
                [doc saveAs:newPdf save_flags:FSPDFDocSaveFlagNoOriginal];
                NSLog(@"Add a new attachment to PDF document.");
            }
            // Output to the txt file.
            NSError *error;
            [content writeToFile:file_info atomically:YES encoding:NSUTF8StringEncoding error:&error];
        }
        @catch (NSException *exception) {
            NSLog(@"Unknown Exception, %@", exception);
            return -1;
        }
    }
    [FSLibrary destroy];
    return 0;
}
