// -*- Mode: ObjC; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*-
//
// This file is part of the LibreOffice project.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

#import "config.h"

#import <algorithm>

// This is not "external" code in the UNO-based extensions sense. To be able to include
// <comphelper/lok.hxx>, we must #define LIBO_INTERNAL_ONLY.

#define LIBO_INTERNAL_ONLY
#include <sal/config.h>
#include <sal/log.hxx>
#include <rtl/ustring.hxx>
#include <comphelper/lok.hxx>
#include <i18nlangtag/languagetag.hxx>

#import "ios.h"
#import "AppDelegate.h"
#import "CODocument.h"
#import "DocumentViewController.h"

#import "ClientSession.hpp"
#import "DocumentBroker.hpp"
#import "FakeSocket.hpp"
#import "Kit.hpp"
#import "KitHelper.hpp"
#import "Log.hpp"
#import "LOOLWSD.hpp"
#import "Protocol.hpp"

@implementation CODocument

- (id)contentsForType:(NSString*)typeName error:(NSError **)errorPtr {
    // Somehow this doesn't feel right, creating an NSFileWrapper around the file that was given to
    // us for loadFromContents. I get the vague feeling that the file is perhaps just a temporary
    // data container created by the system for us to be used while loading the document data, and
    // not the actual permanent document, especially in the case of things like NextCloud. Or is it?
    // Is saving back to the file (which we have already saved to in the core code by the time we
    // get here) correct? This does seem to work, though. Sadly the Apple documentation is a bit
    // lacking about how these things *really* work.
    return [[NSFileWrapper alloc] initWithURL:[self fileURL] options:0 error:errorPtr];
}

- (BOOL)loadFromContents:(id)contents ofType:(NSString *)typeName error:(NSError **)errorPtr {

    // If this method is called a second time on the same CODocument object, just ignore it. This
    // seems to happen occastionally when the device is awakened after sleep. See tdf#122543.
    if (fakeClientFd >= 0)
        return YES;

    fakeClientFd = fakeSocketSocket();
    NSString *uri = [[self fileURL] absoluteString];

    NSURL *url = [[NSBundle mainBundle] URLForResource:@"loleaflet" withExtension:@"html"];
    NSURLComponents *components = [NSURLComponents componentsWithURL:url resolvingAgainstBaseURL:NO];
    components.queryItems = @[ [NSURLQueryItem queryItemWithName:@"file_path" value:uri],
                               [NSURLQueryItem queryItemWithName:@"closebutton" value:@"1"],
                               [NSURLQueryItem queryItemWithName:@"permission" value:@"edit"],
                               [NSURLQueryItem queryItemWithName:@"lang" value:app_locale]
                             ];

    NSURLRequest *request = [[NSURLRequest alloc]initWithURL:components.URL];
    [self.viewController.webView loadRequest:request];

    return YES;
}

- (void)send2JS:(const char *)buffer length:(int)length {
    LOG_TRC("To JS: " << LOOLProtocol::getAbbreviatedMessage(buffer, length).c_str());

    NSString *js;

    const unsigned char *ubufp = (const unsigned char *)buffer;
    std::vector<char> data;
    for (int i = 0; i < length; i++) {
        if (ubufp[i] < ' ' || ubufp[i] == '\'' || ubufp[i] == '\\') {
            data.push_back('\\');
            data.push_back('x');
            data.push_back("0123456789abcdef"[(ubufp[i] >> 4) & 0x0F]);
            data.push_back("0123456789abcdef"[ubufp[i] & 0x0F]);
        } else {
            data.push_back(ubufp[i]);
        }
    }
    data.push_back(0);

    js = @"window.TheFakeWebSocket.onmessage({'data': '";
    js = [js stringByAppendingString:[NSString stringWithUTF8String:data.data()]];
    js = [js stringByAppendingString:@"'});"];

    NSString *subjs = [js substringToIndex:std::min(100ul, js.length)];
    if (subjs.length < js.length)
        subjs = [subjs stringByAppendingString:@"..."];

    // LOG_TRC("Evaluating JavaScript: " << [subjs UTF8String]);

    dispatch_async(dispatch_get_main_queue(), ^{
            [self.viewController.webView evaluateJavaScript:js
                                          completionHandler:^(id _Nullable obj, NSError * _Nullable error)
                 {
                     if (error) {
                         LOG_ERR("Error after " << [subjs UTF8String] << ": " << [[error localizedDescription] UTF8String]);
                         NSString *jsException = error.userInfo[@"WKJavaScriptExceptionMessage"];
                         if (jsException != nil)
                             LOG_ERR("JavaScript exception: " << [jsException UTF8String]);
                     }
                 }
             ];
        });
}

@end

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