/*
 * Copyright (C) 2018, David PHAM-VAN <dev.nfet.net@gmail.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General  License for more details.
 *
 * You should have received a copy of the GNU Lesser General
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#import "PrintingPlugin.h"

@implementation PrintingPlugin
+ (void)registerWithRegistrar:(NSObject<FlutterPluginRegistrar>*)registrar {
  FlutterMethodChannel* channel =
      [FlutterMethodChannel methodChannelWithName:@"printing"
                                  binaryMessenger:[registrar messenger]];
  PrintingPlugin* instance = [[PrintingPlugin alloc] init];
  [registrar addMethodCallDelegate:instance channel:channel];
}

- (void)handleMethodCall:(FlutterMethodCall*)call result:(FlutterResult)result {
  if ([@"printPdf" isEqualToString:call.method]) {
    [self printPdf:[call.arguments objectForKey:@"doc"]];
    result(@1);
  } else if ([@"sharePdf" isEqualToString:call.method]) {
    [self sharePdf:[call.arguments objectForKey:@"doc"]
        withSourceRect:CGRectMake(
                           [[call.arguments objectForKey:@"x"] floatValue],
                           [[call.arguments objectForKey:@"y"] floatValue],
                           [[call.arguments objectForKey:@"w"] floatValue],
                           [[call.arguments objectForKey:@"h"] floatValue])];
    result(@1);
  } else {
    result(FlutterMethodNotImplemented);
  }
}

- (void)printPdf:(nonnull FlutterStandardTypedData*)data {
  BOOL printing = [UIPrintInteractionController isPrintingAvailable];
  if (!printing) {
    NSLog(@"printing not available");
    return;
  }

  BOOL dataOK = [UIPrintInteractionController canPrintData:[data data]];
  if (!dataOK)
    NSLog(@"data not ok to be printed");

  UIPrintInteractionController* controller =
      [UIPrintInteractionController sharedPrintController];
  [controller setDelegate:self];
  [controller setPrintingItem:[data data]];

  UIPrintInteractionCompletionHandler completionHandler =
      ^(UIPrintInteractionController* printController, BOOL completed,
        NSError* error) {
        if (!completed && error) {
          NSLog(@"FAILED! due to error in domain %@ with error code %u",
                error.domain, (unsigned int)error.code);
        }
      };

  [controller presentAnimated:YES completionHandler:completionHandler];
}

- (void)sharePdf:(nonnull FlutterStandardTypedData*)data
    withSourceRect:(CGRect)rect {
  NSURL* tmpDirURL =
      [NSURL fileURLWithPath:NSTemporaryDirectory() isDirectory:YES];

  CFUUIDRef uuid = CFUUIDCreate(NULL);
  assert(uuid != NULL);

  CFStringRef uuidStr = CFUUIDCreateString(NULL, uuid);
  assert(uuidStr != NULL);

  NSURL* fileURL = [[tmpDirURL
      URLByAppendingPathComponent:[NSString
                                      stringWithFormat:@"pdf-%@", uuidStr]]
      URLByAppendingPathExtension:@"pdf"];
  assert(fileURL != NULL);

  CFRelease(uuidStr);
  CFRelease(uuid);

  NSString* path = [fileURL path];

  NSError* error;
  if (!
      [[data data] writeToFile:path options:NSDataWritingAtomic error:&error]) {
    NSLog(@"sharePdf error: %@", [error localizedDescription]);
    return;
  }

  UIActivityViewController* activityViewController =
      [[UIActivityViewController alloc] initWithActivityItems:@[ fileURL ]
                                        applicationActivities:nil];
  if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
    UIViewController* controller =
        [UIApplication sharedApplication].keyWindow.rootViewController;
    activityViewController.popoverPresentationController.sourceView =
        controller.view;
    activityViewController.popoverPresentationController.sourceRect = rect;
  }
  [[UIApplication sharedApplication].keyWindow.rootViewController
      presentViewController:activityViewController
                   animated:YES
                 completion:nil];
}

@end