/*****************************************************************************
 * VLCHTTPUploaderViewController.m
 * VLC for iOS
 *****************************************************************************
 * Copyright (c) 2013 VideoLAN. All rights reserved.
 * $Id$
 *
 * Authors: Jean-Baptiste Kempf <jb # videolan.org>
 *          Gleb Pinigin <gpinigin # gmail.com>
 *          Felix Paul Kühne <fkuehne # videolan.org>
 *          Jean-Romain Prévost <jr # 3on.fr>
 *
 * Refer to the COPYING file of the official project for license.
 *****************************************************************************/

#import "VLCAppDelegate.h"
#import "VLCHTTPUploaderController.h"
#import "VLCHTTPConnection.h"

#import "HTTPServer.h"

#import <ifaddrs.h>
#import <arpa/inet.h>

#if TARGET_IPHONE_SIMULATOR
    NSString *const WifiInterfaceName = @"en1";
#else
    NSString *const WifiInterfaceName = @"en0";
#endif

@implementation VLCHTTPUploaderController

- (id)init
{
    if (self = [super init]) {
        NSNotificationCenter *center = [NSNotificationCenter defaultCenter];
        [center addObserver:self selector:@selector(applicationDidBecomeActive:)
            name:UIApplicationDidBecomeActiveNotification object:nil];
        [center addObserver:self selector:@selector(applicationDidEnterBackground:)
            name:UIApplicationDidEnterBackgroundNotification object:nil];
    }

    return self;
}

- (void)applicationDidBecomeActive: (NSNotification *)notification
{
    [self changeHTTPServerState:[[NSUserDefaults standardUserDefaults] boolForKey:kVLCSettingSaveHTTPUploadServerStatus]];
}

- (void)applicationDidEnterBackground: (NSNotification *)notification
{
    [self changeHTTPServerState:NO];
}

- (BOOL)changeHTTPServerState:(BOOL)state
{
    if (!state) {
        [self.httpServer stop];
        return true;
    }
    // Initialize our http server
    _httpServer = [[HTTPServer alloc] init];
    [_httpServer setInterface:WifiInterfaceName];

    // Tell the server to broadcast its presence via Bonjour.
    // This allows browsers such as Safari to automatically discover our service.
    [self.httpServer setType:@"_http._tcp."];

    // Serve files from the standard Sites folder
    NSString *docRoot = [[[NSBundle mainBundle] pathForResource:@"index" ofType:@"html"] stringByDeletingLastPathComponent];

    APLog(@"Setting document root: %@", docRoot);

    [self.httpServer setDocumentRoot:docRoot];
    [self.httpServer setPort:80];

    [self.httpServer setConnectionClass:[VLCHTTPConnection class]];

    NSError *error = nil;
    if (![self.httpServer start:&error]) {
        if (error.code == 13) {
            APLog(@"Port forbidden by OS, trying another one");
            [self.httpServer setPort:8888];
            if(![self.httpServer start:&error])
                return true;
        }

        /* Address already in Use, take a random one */
        if (error.code == 48) {
            APLog(@"Port already in use, trying another one");
            [self.httpServer setPort:0];
            if(![self.httpServer start:&error])
                return true;
        }

        if (error.code != 0)
            APLog(@"Error starting HTTP Server: %@", error.localizedDescription);
        return false;
    }
    return true;
}

- (NSString *)currentIPAddress
{
    NSString *address = @"";
    struct ifaddrs *interfaces = NULL;
    struct ifaddrs *temp_addr = NULL;
    int success = getifaddrs(&interfaces);

    if (!success) {
        freeifaddrs(interfaces);
        return address;
    }

    temp_addr = interfaces;
    while (temp_addr != NULL) {
        if (temp_addr->ifa_addr->sa_family == AF_INET) {
            if([@(temp_addr->ifa_name) isEqualToString:WifiInterfaceName])
                address = @(inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr));
        }
        temp_addr = temp_addr->ifa_next;
    }

    freeifaddrs(interfaces);
    return address;
}

@end