//
//  XSUtils.m
//  XenonSDK
//
//  Created by SAGESSE on 2019/5/28.
//  Copyright © 2019 SAGESSE. All rights reserved.
//

#import "XSUtils.h"

#import <Security/Security.h>
#import <CommonCrypto/CommonCrypto.h>
#import <SystemConfiguration/SystemConfiguration.h>

NSString* sdk_md5(NSString* value) {
    unsigned char buff[CC_MD5_DIGEST_LENGTH] = {};
    const char* ptr = value.UTF8String;
    CC_MD5(ptr, (CC_LONG)strlen(ptr), buff);
    NSMutableString* result = [[NSMutableString alloc] init];
    for (int i = 0; i < CC_MD5_DIGEST_LENGTH; ++i) {
        [result appendFormat:@"%02x", buff[i]];
    }
    return result;
}

NSString* sdk_signature(NSDictionary* value, NSString* key) {
    
    NSMutableString* str = [NSMutableString new];
    NSArray* keys = [value.allKeys sortedArrayUsingComparator:^NSComparisonResult(id  _Nonnull obj1, id  _Nonnull obj2) {
        return [obj1 compare:obj2];
    }];
    [keys enumerateObjectsUsingBlock:^(id  _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
        [str appendFormat:@"%@%@", obj, value[obj] ?: @""];
    }];
    [str appendString:key];
    
    // MD5
    NSString* uxs = [sdk_md5(str) uppercaseString];
    NSString* dkey = [uxs substringFromIndex:uxs.length - 8];
    
    // DES encrypt.
    return [sdk_encrypt([uxs dataUsingEncoding:NSUTF8StringEncoding], dkey) base64EncodedStringWithOptions:0];
}

id sdk_encrypt(NSData* value, NSString* key) {
    
    // Create temporary buffer.
    NSInteger count = MAX(value.length * 2, 1024);

    void* ptr = malloc(count);
    size_t lenght = 0;
    
    // Call the encryption algorithm.
    CCCryptorStatus result = CCCrypt(kCCEncrypt, kCCAlgorithmDES, ccPKCS7Padding, key.UTF8String, key.length, "\x1\x2\x3\x4\x5\x6\x7\x8", value.bytes, value.length, ptr, count, &lenght);
    
    // Check encryption result.
    if (result != kCCSuccess) {
        return nil;
    }
    
    // Base64 encoding of the encrypted result.
    NSData* data = [NSData dataWithBytes:ptr length:lenght];
    free(ptr);
    return data;
}
id sdk_decrypt(NSData* value, NSString* key) {
    
    // Create temporary buffer.
    NSInteger count = MAX(value.length * 2, 1024);
    
    void* ptr = malloc(count);
    size_t lenght = 0;
    
    // Call the encryption algorithm.
    CCCryptorStatus result = CCCrypt(kCCDecrypt, kCCAlgorithmDES, ccPKCS7Padding, key.UTF8String, key.length, "\x1\x2\x3\x4\x5\x6\x7\x8", value.bytes, value.length, ptr, count, &lenght);
    
    // Check encryption result.
    if (result != kCCSuccess) {
        return nil;
    }
    
    // Base64 encoding of the encrypted result.
    NSData* data = [NSData dataWithBytes:ptr length:lenght];
    free(ptr);
    return data;
}


@interface AutoLayoutBasedI375: NSLayoutConstraint
@end
@interface AutoLayoutBasedI414: NSLayoutConstraint
@end
@implementation AutoLayoutBasedI375
- (CGFloat)constant {
    return CGFloatBasedI375(super.constant);
}
@end
@implementation AutoLayoutBasedI414
- (CGFloat)constant {
    return CGFloatBasedI414(super.constant);
}
@end

BOOL sdk_verifyPhone(NSString* value) {
    NSPredicate* p = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", @"^1[3456789]\\d{9}$", nil];
    return [p evaluateWithObject:value];
}