/*

 * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

 *

 * File created on 08/04/2010.

 */

#import "CommodityFunctions.h"

#import <sys/types.h>

#import <sys/sysctl.h>

#import <mach/mach.h>

#import <mach/mach_host.h>

#import <QuartzCore/QuartzCore.h>

#import <CommonCrypto/CommonDigest.h>

#import <SystemConfiguration/SCNetworkReachability.h>

#import <netinet/in.h>

#import "PascalImports.h"

#import "hwconsts.h"

NSInteger inline randomPort () {

    srandom(time(NULL));

    NSInteger res = (random() % 64511) + 1024;

    return (res == NETGAME_DEFAULT_PORT) ? randomPort() : res;

}

// by http://landonf.bikemonkey.org/code/iphone/Determining_Available_Memory.20081203.html

void print_free_memory () {

#ifdef DEBUG

    mach_port_t host_port;

    mach_msg_type_number_t host_size;

    vm_size_t pagesize;

    host_port = mach_host_self();

    host_size = sizeof(vm_statistics_data_t) / sizeof(integer_t);

    host_page_size(host_port, &pagesize);

    vm_statistics_data_t vm_stat;

    if (host_statistics(host_port, HOST_VM_INFO, (host_info_t)&vm_stat, &host_size) != KERN_SUCCESS)

        DLog(@"Failed to fetch vm statistics");

    /* Stats in bytes */

    natural_t mem_used = (vm_stat.active_count + vm_stat.inactive_count + vm_stat.wire_count) * pagesize;

    natural_t mem_free = vm_stat.free_count * pagesize;

    natural_t mem_total = mem_used + mem_free;

    DLog(@"used: %u free: %u total: %u", mem_used, mem_free, mem_total);

#endif

}

NSString *getModelType () {

    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);

    NSString *modelId = [NSString stringWithUTF8String:name];

    free(name);

    return modelId;

}

NSArray *getAvailableColors (void) {

    // 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)]];

    NSArray *final = [NSArray arrayWithArray:array];

    [array release];

    return final;

}

UILabel *createBlueLabel (NSString *title, CGRect frame) {

    return createLabelWithParams(title, frame, 1.5f, UICOLOR_HW_YELLOW_BODER, UICOLOR_HW_DARKBLUE);

}

UILabel *createLabelWithParams (NSString *title, CGRect frame, CGFloat borderWidth, UIColor *borderColor, UIColor *backgroundColor) {

    UILabel *theLabel = [[UILabel alloc] initWithFrame:frame];

    theLabel.backgroundColor = backgroundColor;

    if (title != nil) {

        theLabel.text = title;

        theLabel.textColor = UICOLOR_HW_YELLOW_TEXT;

        theLabel.textAlignment = UITextAlignmentCenter;

        theLabel.font = [UIFont boldSystemFontOfSize:[UIFont labelFontSize]*80/100];

    }

    [theLabel.layer setBorderWidth:borderWidth];

    [theLabel.layer setBorderColor:borderColor.CGColor];

    [theLabel.layer setCornerRadius:8.0f];

    [theLabel.layer setMasksToBounds:YES];

    return theLabel;

}

BOOL isNetworkReachable (void) {

    // 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;

}

// this routine checks for the PNG size without loading it in memory

// https://github.com/steipete/PSFramework/blob/master/PSFramework%20Version%200.3/PhotoshopFramework/PSMetaDataFunctions.m

CGSize PSPNGSizeFromMetaData (NSString *aFileName) {

    // File Name to C String.

    const char *fileName = [aFileName UTF8String];

    // source file

    FILE *infile = fopen(fileName, "rb");

    if (infile == NULL) {

        DLog(@"Can't open the file: %@", aFileName);

        return CGSizeZero;

    }

    // Bytes Buffer.

    unsigned char buffer[30];

    // Grab Only First Bytes.

    fread(buffer, 1, 30, infile);

    // Close File.

    fclose(infile);

    // PNG Signature.

    unsigned char png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10};

    // Compare File signature.

    if ((int)(memcmp(&buffer[0], &png_signature[0], 8))) {

        DLog(@"The file (%@) is not a PNG file", aFileName);

        return CGSizeZero;

    }

    // Calc Sizes. Isolate only four bytes of each size (width, height).

    int width[4];

    int height[4];

    for (int d = 16; d < (16 + 4); d++) {

        width[d-16] = buffer[d];

        height[d-16] = buffer[d+4];

    }

    // Convert bytes to Long (Integer)

    long resultWidth = (width[0] << (int)24) | (width[1] << (int)16) | (width[2] << (int)8) | width[3];

    long resultHeight = (height[0] << (int)24) | (height[1] << (int)16) | (height[2] << (int)8) | height[3];

    // Return Size.

    return CGSizeMake(resultWidth,resultHeight);

}

@implementation NSString (extra)

-(NSString *)MD5hash {

    const char *cStr = [self UTF8String];

    unsigned char result[16];

    CC_MD5( cStr, strlen(cStr), result );

    return [NSString stringWithFormat:

            @"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",

            result[0], result[1], result[2], result[3], result[4], result[5],

            result[6], result[7], result[8], result[9], result[10], result[11],

            result[12], result[13], result[14], result[15]];

}

@end