/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */


#import "HttpdnsLog_Internal.h"

static BOOL HttpdnsLogIsEnabled = NO;

static id<HttpdnsLoggerProtocol> sLogHandler;

@implementation HttpdnsLog

+ (void)enableLog {
    HttpdnsLogIsEnabled = YES;
}

+ (void)disableLog {
    HttpdnsLogIsEnabled = NO;
}

+ (BOOL)isEnabled {
    return HttpdnsLogIsEnabled;
}

+ (void)setLogHandler:(id<HttpdnsLoggerProtocol>)handler {
    SEL sel = NSSelectorFromString(@"log:");
    if (handler && [handler respondsToSelector:sel]) {
        sLogHandler = handler;
    }
}

+ (void)unsetLogHandler {
    sLogHandler = nil;
}

+ (BOOL)validLogHandler {
    return (sLogHandler != nil);
}

+ (void)outputToLogHandler:(NSString *)logStr {
    if (sLogHandler) {
        [sLogHandler log:logStr];
    }
}

+ (NSString *)getFormattedDateTimeStr {
    static NSDateFormatter *dateFormatter;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        dateFormatter = [[NSDateFormatter alloc] init];
    });

    [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss.SSS"];
    return [dateFormatter stringFromDate:[NSDate date]];
}

@end