/*
 * 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.
 */
package org.apache.maven.artifact.repository;

import java.util.Calendar;
import java.util.Date;

/**
 * Describes a set of policies for a repository to use under certain conditions.
 *
 * @author <a href="mailto:brett@apache.org">Brett Porter</a>
 * @deprecated Avoid use of this type, if you need access to local repository use repository system session instead.
 */
@Deprecated
public class ArtifactRepositoryPolicy {
    public static final String UPDATE_POLICY_NEVER = "never";

    public static final String UPDATE_POLICY_ALWAYS = "always";

    public static final String UPDATE_POLICY_DAILY = "daily";

    public static final String UPDATE_POLICY_INTERVAL = "interval";

    public static final String CHECKSUM_POLICY_FAIL = "fail";

    public static final String CHECKSUM_POLICY_WARN = "warn";

    public static final String CHECKSUM_POLICY_IGNORE = "ignore";

    private boolean enabled;

    private String updatePolicy;

    private String checksumPolicy;

    public ArtifactRepositoryPolicy() {
        this(true, null, null);
    }

    public ArtifactRepositoryPolicy(ArtifactRepositoryPolicy policy) {
        this(policy.isEnabled(), policy.getUpdatePolicy(), policy.getChecksumPolicy());
    }

    public ArtifactRepositoryPolicy(boolean enabled, String updatePolicy, String checksumPolicy) {
        this.enabled = enabled;

        if (updatePolicy == null) {
            updatePolicy = UPDATE_POLICY_DAILY;
        }
        this.updatePolicy = updatePolicy;

        if (checksumPolicy == null) {
            checksumPolicy = CHECKSUM_POLICY_WARN;
        }
        this.checksumPolicy = checksumPolicy;
    }

    public void setEnabled(boolean enabled) {
        this.enabled = enabled;
    }

    public void setUpdatePolicy(String updatePolicy) {
        if (updatePolicy != null) {
            this.updatePolicy = updatePolicy;
        }
    }

    public void setChecksumPolicy(String checksumPolicy) {
        if (checksumPolicy != null) {
            this.checksumPolicy = checksumPolicy;
        }
    }

    public boolean isEnabled() {
        return enabled;
    }

    public String getUpdatePolicy() {
        return updatePolicy;
    }

    public String getChecksumPolicy() {
        return checksumPolicy;
    }

    public boolean checkOutOfDate(Date lastModified) {
        boolean checkForUpdates = false;

        if (UPDATE_POLICY_ALWAYS.equals(updatePolicy)) {
            checkForUpdates = true;
        } else if (UPDATE_POLICY_DAILY.equals(updatePolicy)) {
            // Get local midnight boundary
            Calendar cal = Calendar.getInstance();

            cal.set(Calendar.HOUR_OF_DAY, 0);
            cal.set(Calendar.MINUTE, 0);
            cal.set(Calendar.SECOND, 0);
            cal.set(Calendar.MILLISECOND, 0);

            if (cal.getTime().after(lastModified)) {
                checkForUpdates = true;
            }
        } else if (updatePolicy.startsWith(UPDATE_POLICY_INTERVAL)) {
            String s = updatePolicy.substring(UPDATE_POLICY_INTERVAL.length() + 1);
            int minutes = Integer.parseInt(s);
            Calendar cal = Calendar.getInstance();
            cal.add(Calendar.MINUTE, -minutes);
            if (cal.getTime().after(lastModified)) {
                checkForUpdates = true;
            }
        }
        // else assume "never"
        return checkForUpdates;
    }

    @Override
    public String toString() {
        StringBuilder buffer = new StringBuilder(64);
        buffer.append("{enabled=");
        buffer.append(enabled);
        buffer.append(", checksums=");
        buffer.append(checksumPolicy);
        buffer.append(", updates=");
        buffer.append(updatePolicy);
        buffer.append('}');
        return buffer.toString();
    }

    public void merge(ArtifactRepositoryPolicy policy) {
        if (policy != null && policy.isEnabled()) {
            setEnabled(true);

            if (ordinalOfCksumPolicy(policy.getChecksumPolicy()) < ordinalOfCksumPolicy(getChecksumPolicy())) {
                setChecksumPolicy(policy.getChecksumPolicy());
            }

            if (ordinalOfUpdatePolicy(policy.getUpdatePolicy()) < ordinalOfUpdatePolicy(getUpdatePolicy())) {
                setUpdatePolicy(policy.getUpdatePolicy());
            }
        }
    }

    private int ordinalOfCksumPolicy(String policy) {
        if (ArtifactRepositoryPolicy.CHECKSUM_POLICY_FAIL.equals(policy)) {
            return 2;
        } else if (ArtifactRepositoryPolicy.CHECKSUM_POLICY_IGNORE.equals(policy)) {
            return 0;
        } else {
            return 1;
        }
    }

    private int ordinalOfUpdatePolicy(String policy) {
        if (ArtifactRepositoryPolicy.UPDATE_POLICY_DAILY.equals(policy)) {
            return 1440;
        } else if (ArtifactRepositoryPolicy.UPDATE_POLICY_ALWAYS.equals(policy)) {
            return 0;
        } else if (policy != null && policy.startsWith(ArtifactRepositoryPolicy.UPDATE_POLICY_INTERVAL)) {
            String s = policy.substring(UPDATE_POLICY_INTERVAL.length() + 1);
            return Integer.parseInt(s);
        } else {
            return Integer.MAX_VALUE;
        }
    }
}
