/*

 * Hedgewars-iOS, a Hedgewars port for iOS devices

 * Copyright (c) 2009-2010 Vittorio Giovara <vittorio.giovara@gmail.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; version 2 of the License

 *

 * This program 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 General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.

 */

#import "HWUtils.h"

#import <sys/types.h>

#import <sys/sysctl.h>

#import <netinet/in.h>

#import <SystemConfiguration/SCNetworkReachability.h>

#import "hwconsts.h"

static NSString *cachedModel = nil;

static NSArray *cachedColors = nil;

static NSMutableArray *activePorts = nil;

static TGameType gameType = gtNone;

static TGameStatus gameStatus = gsNone;

@implementation HWUtils

#pragma mark -

#pragma mark game status and type info

+(TGameType) gameType {

    return gameType;

}

+(void) setGameType:(TGameType) type {

    gameType = type;

}

+(TGameStatus) gameStatus {

    return gameStatus;

}

+(void) setGameStatus:(TGameStatus) status {

    gameStatus = status;

}

+(BOOL) isGameLaunched {

    return ((gameStatus == gsLoading) || (gameStatus == gsInGame));

}

+(BOOL) isGameRunning {

    return (gameStatus == gsInGame);

}

#pragma mark -

#pragma mark Helper Functions with cache

+(NSString *)modelType {

    if (cachedModel == nil) {

        size_t size;

        // set 'oldp' parameter to NULL to get the size of the data returned so we can allocate appropriate amount of space

        sysctlbyname("hw.machine", NULL, &size, NULL, 0);

        char *name = (char *)malloc(sizeof(char) * size);

        // get the platform name

        sysctlbyname("hw.machine", name, &size, NULL, 0);

        cachedModel = [[NSString stringWithUTF8String:name] retain];

        free(name);

    }

    return cachedModel;

}

+(NSArray *)teamColors {

    if (cachedColors == nil) {

        // by default colors are ARGB but we do computation over RGB, hence we have to "& 0x00FFFFFF" before processing

        unsigned int colors[] = HW_TEAMCOLOR_ARRAY;

        NSMutableArray *array = [[NSMutableArray alloc] init];

        int i = 0;

        while(colors[i] != 0)

            [array addObject:[NSNumber numberWithUnsignedInt:(colors[i++] & 0x00FFFFFF)]];

        cachedColors = [[NSArray arrayWithArray:array] retain];

        [array release];

    }

    return cachedColors;

}

+(void) releaseCache {

    [cachedModel release], cachedModel = nil;

    [cachedColors release], cachedColors = nil;

    // don't release activePorts here

}

#pragma mark -

#pragma mark Helper Functions without cache

+(NSInteger) randomPort {

    // set a new feed only at initialization time and forbid connecting to the server port

    if (activePorts == nil) {

        activePorts = [[NSMutableArray arrayWithObject:[NSNumber numberWithInt:NETGAME_DEFAULT_PORT]] retain];

    }

    // pick a random number from the free ports list

    NSInteger res = 0;

    do {

        res = (arc4random_uniform(64511)) + 1024;

    } while ([activePorts containsObject:[NSNumber numberWithInteger:res]]);

    // add this number to the forbdding list

    [activePorts addObject:[NSNumber numberWithInteger:res]];

    return res;

}

+(void) freePort:(NSInteger) port {

    [activePorts removeObject:[NSNumber numberWithInteger:port]];

}

+(BOOL) isNetworkReachable {

    // Create zero addy

    struct sockaddr_in zeroAddress;

    bzero(&zeroAddress, sizeof(zeroAddress));

    zeroAddress.sin_len = sizeof(zeroAddress);

    zeroAddress.sin_family = AF_INET;

    // Recover reachability flags

    SCNetworkReachabilityRef defaultRouteReachability = SCNetworkReachabilityCreateWithAddress(NULL, (struct sockaddr *)&zeroAddress);

    SCNetworkReachabilityFlags flags;

    BOOL didRetrieveFlags = SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags);

    CFRelease(defaultRouteReachability);

    if (!didRetrieveFlags) {

        NSLog(@"Error. Could not recover network reachability flags");

        return NO;

    }

    BOOL isReachable = flags & kSCNetworkFlagsReachable;

    BOOL needsConnection = flags & kSCNetworkFlagsConnectionRequired;

    BOOL nonWiFi = flags & kSCNetworkReachabilityFlagsTransientConnection;

    NSURL *testURL = [NSURL URLWithString:@"http://www.apple.com/"];

    NSURLRequest *testRequest = [NSURLRequest requestWithURL:testURL

                                                 cachePolicy:NSURLRequestReloadIgnoringLocalCacheData

                                             timeoutInterval:20.0];

    NSURLConnection *testConnection = [[NSURLConnection alloc] initWithRequest:testRequest delegate:nil];

    BOOL testResult = testConnection ? YES : NO;

    [testConnection release];

    return ((isReachable && !needsConnection) || nonWiFi) ? testResult : NO;

}

+ (NSString *)languageID

{

    NSString *language = [[NSLocale preferredLanguages] firstObject];

    return [[language componentsSeparatedByString:@"-"] firstObject];

}

/*

+(UIView *)mainSDLViewInstance {

    SDL_Window *window = HW_getSDLWindow();

    if (window == NULL) {

        SDL_SetError("Window does not exist");

        return nil;

    }

    SDL_WindowData *data = (SDL_WindowData *)window->driverdata;

    SDL_uikitview *view = data != NULL ? data->view : nil;

    return view;

}

*/

@end