/*
 * 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