/*
 * Copyright (C) 2021 Christian Pierre MOMON <christian@momon.org>
 * 
 * This file is part of StatoolInfos, simple service statistics tool.
 * 
 * StatoolInfos is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * 
 * StatoolInfos 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 Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with StatoolInfos.  If not, see <http://www.gnu.org/licenses/>.
 */
package fr.devinsy.statoolinfos.metrics.http;

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Locale;
import java.util.regex.Pattern;

import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import fr.devinsy.statoolinfos.metrics.TimeMarkUtils;
import fr.devinsy.strings.StringList;
import fr.devinsy.strings.StringsUtils;

/**
 * The Class HttpAccessLog.
 */
public class HttpAccessLog
{
    private static Logger logger = LoggerFactory.getLogger(HttpAccessLog.class);

    public static final Pattern IPV4_PATTERN = Pattern.compile("\\d{0,3}\\.\\d{0,3}\\.\\d{0,3}\\.\\d{0,3}");
    public static final Pattern IPV6_PATTERN = Pattern.compile("([0-9a-f]{1,4}:{1,2}){4,7}([0-9a-f]){1,4}", Pattern.CASE_INSENSITIVE);

    private String remoteAddress;
    private String remoteUser;
    private LocalDateTime time;
    private String request;
    private HttpStatus status;
    private long bodyBytesSent;
    private String referer;
    private UserAgent userAgent;

    /**
     * Instantiates a new http access log.
     */
    public HttpAccessLog()
    {
        this.remoteAddress = null;
        this.remoteUser = null;
        this.time = null;
        this.request = null;
        this.status = null;
        this.bodyBytesSent = 0;
        this.referer = null;
        this.userAgent = null;
    }

    public long getBodyBytesSent()
    {
        return this.bodyBytesSent;
    }

    public String getDate()
    {
        String result;

        result = this.time.format(DateTimeFormatter.ofPattern("yyyy-MM-dd", Locale.FRANCE));

        //
        return result;
    }

    public String getReferer()
    {
        return this.referer;
    }

    public String getRemoteAddress()
    {
        return this.remoteAddress;
    }

    public String getRemoteUser()
    {
        return this.remoteUser;
    }

    public String getRequest()
    {
        return this.request;
    }

    public HttpStatus getStatus()
    {
        return this.status;
    }

    public LocalDateTime getTime()
    {
        return this.time;
    }

    public UserAgent getUserAgent()
    {
        return this.userAgent;
    }

    /**
     * Gets the year.
     *
     * @return the year
     */
    public String getYear()
    {
        String result;

        if (this.time == null)
        {
            result = null;
        }
        else
        {
            result = TimeMarkUtils.yearOf(this.time);
        }

        //
        return result;
    }

    /**
     * Gets the year month.
     *
     * @return the year month
     */
    public String getYearMonth()
    {
        String result;

        if (this.time == null)
        {
            result = null;
        }
        else
        {
            result = TimeMarkUtils.yearMonthOf(this.time);
        }
        //
        return result;
    }

    /**
     * Gets the year week.
     *
     * @return the year week
     */
    public String getYearWeek()
    {
        String result;
        if (this.time == null)
        {
            result = null;
        }
        else
        {
            result = TimeMarkUtils.yearWeekOf(this.time);
        }
        //
        return result;
    }

    /**
     * @return
     */
    public boolean isBot()
    {
        boolean result;

        if (StringsUtils.containsAnyIgnoreCase(this.userAgent.toString(), "bot", "monitoring", "Apache-HttpClient"))
        {
            result = true;
        }
        else if (StringUtils.startsWithAny(this.userAgent.toString(), "Java/", "HotJava/"))
        {
            result = true;
        }
        else
        {
            result = false;
        }

        //
        return result;
    }

    /**
     * Checks if is ipv4.
     *
     * @return true, if is ipv4
     */
    public boolean isIPv4()
    {
        boolean result;

        if (this.remoteAddress == null)
        {
            result = false;
        }
        else
        {
            result = this.remoteAddress.contains(".");
        }
        //
        return result;
    }

    /**
     * Checks if is ipv6.
     *
     * @return true, if is ipv6
     */
    public boolean isIPv6()
    {
        boolean result;

        if (this.remoteAddress == null)
        {
            result = false;
        }
        else
        {
            result = this.remoteAddress.contains(":");
        }
        //
        return result;
    }

    public void setBodyBytesSent(final long bodyBytesSent)
    {
        this.bodyBytesSent = bodyBytesSent;
    }

    public void setReferer(final String referer)
    {
        this.referer = referer;
    }

    public void setRemoteAddress(final String remoteAddress)
    {
        this.remoteAddress = remoteAddress;
    }

    public void setRemoteUser(final String remoteUser)
    {
        this.remoteUser = remoteUser;
    }

    public void setRequest(final String request)
    {
        this.request = request;
    }

    public void setStatus(final HttpStatus status)
    {
        this.status = status;
    }

    public void setTime(final LocalDateTime time)
    {
        this.time = time;
    }

    public void setUserAgent(final UserAgent userAgent)
    {
        this.userAgent = userAgent;
    }

    /**
     * To string.
     *
     * @return the string
     */
    @Override
    public String toString()
    {
        String result;

        StringList buffer = new StringList();

        buffer.append("[remoteAddress=").append(this.remoteAddress).append("]");
        buffer.append("[remoteUser=").append(this.remoteUser).append("]");
        buffer.append("[time=").append(this.time).append("]");
        buffer.append("[request=").append(this.request).append("]");
        buffer.append("[status=").append(this.status.getCode()).append("]");
        buffer.append("[bodyBytesSent=").append(this.bodyBytesSent).append("]");
        buffer.append("[referer=").append(this.referer).append("]");
        buffer.append("[userAgent=").append(this.userAgent).append("]");

        result = buffer.toString();

        //
        return result;
    }
}