/*
 * The MIT License
 *
 * Copyright (c) 2004-2010, Sun Microsystems, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package hudson.cli;

import hudson.Util;
import hudson.console.ModelHyperlinkNote;
import hudson.model.Cause.UserIdCause;
import hudson.model.CauseAction;
import hudson.model.Job;
import hudson.model.Run;
import hudson.model.ParametersAction;
import hudson.model.ParameterValue;
import hudson.model.ParametersDefinitionProperty;
import hudson.model.ParameterDefinition;
import hudson.Extension;
import hudson.AbortException;
import hudson.model.Queue;
import hudson.model.Item;
import hudson.model.TaskListener;
import hudson.model.User;
import hudson.model.queue.QueueTaskFuture;
import hudson.util.EditDistance;
import hudson.util.StreamTaskListener;

import java.nio.file.NoSuchFileException;
import jenkins.scm.SCMDecisionHandler;
import org.kohsuke.args4j.Argument;
import org.kohsuke.args4j.CmdLineException;
import org.kohsuke.args4j.Option;

import java.util.Map;
import java.util.HashMap;
import java.util.List;
import java.util.ArrayList;
import java.util.Map.Entry;
import java.io.FileNotFoundException;
import java.io.PrintStream;

import jenkins.model.Jenkins;
import jenkins.model.ParameterizedJobMixIn;
import jenkins.triggers.SCMTriggerItem;

/**
 * Builds a job, and optionally waits until its completion.
 *
 * @author Kohsuke Kawaguchi
 */
@Extension
public class BuildCommand extends CLICommand {
    @Override
    public String getShortDescription() {
        return Messages.BuildCommand_ShortDescription();
    }

    @Argument(metaVar="JOB",usage="Name of the job to build",required=true)
    public Job<?,?> job;

    @Option(name="-f", usage="Follow the build progress. Like -s only interrupts are not passed through to the build.")
    public boolean follow = false;

    @Option(name="-s",usage="Wait until the completion/abortion of the command. Interrupts are passed through to the build.")
    public boolean sync = false;

    @Option(name="-w",usage="Wait until the start of the command")
    public boolean wait = false;

    @Option(name="-c",usage="Check for SCM changes before starting the build, and if there's no change, exit without doing a build")
    public boolean checkSCM = false;

    @Option(name="-p",usage="Specify the build parameters in the key=value format.")
    public Map<String,String> parameters = new HashMap<>();

    @Option(name="-v",usage="Prints out the console output of the build. Use with -s")
    public boolean consoleOutput = false;

    @Option(name="-r") @Deprecated
    public int retryCnt = 10;

    protected static final String BUILD_SCHEDULING_REFUSED = "Build scheduling Refused by an extension, hence not in Queue.";

    @Override
    protected int run() throws Exception {
        job.checkPermission(Item.BUILD);

        ParametersAction a = null;
        if (!parameters.isEmpty()) {
            ParametersDefinitionProperty pdp = job.getProperty(ParametersDefinitionProperty.class);
            if (pdp==null)
                throw new IllegalStateException(job.getFullDisplayName()+" is not parameterized but the -p option was specified.");

            //TODO: switch to type annotations after the migration to Java 1.8
            List<ParameterValue> values = new ArrayList<>();

            for (Entry<String, String> e : parameters.entrySet()) {
                String name = e.getKey();
                ParameterDefinition pd = pdp.getParameterDefinition(name);
                if (pd==null) {
                    String nearest = EditDistance.findNearest(name, pdp.getParameterDefinitionNames());
                    throw new CmdLineException(null, nearest == null ?
                            String.format("'%s' is not a valid parameter.", name) :
                            String.format("'%s' is not a valid parameter. Did you mean %s?", name, nearest));
                }
                ParameterValue val = pd.createValue(this, Util.fixNull(e.getValue()));
                if (val == null) {
                    throw new CmdLineException(null, String.format("Cannot resolve the value for the parameter '%s'.",name));
                }
                values.add(val);
            }

            // handle missing parameters by adding as default values ISSUE JENKINS-7162
            for(ParameterDefinition pd :  pdp.getParameterDefinitions()) {
                if (parameters.containsKey(pd.getName()))
                    continue;

                // not passed in use default
                ParameterValue defaultValue = pd.getDefaultParameterValue();
                if (defaultValue == null) {
                    throw new CmdLineException(null, String.format("No default value for the parameter '%s'.",pd.getName()));
                }
                values.add(defaultValue);
            }

            a = new ParametersAction(values);
        }

        if (checkSCM) {
            SCMTriggerItem item = SCMTriggerItem.SCMTriggerItems.asSCMTriggerItem(job);
            if (item == null)
                throw new AbortException(job.getFullDisplayName()+" has no SCM trigger, but checkSCM was specified");
            // preemptively check for a polling veto
            if (SCMDecisionHandler.firstShouldPollVeto(job) != null) {
                return 0;
            }
            if (!item.poll(new StreamTaskListener(stdout, getClientCharset())).hasChanges())
                return 0;
        }

        if (!job.isBuildable()) {
            String msg = Messages.BuildCommand_CLICause_CannotBuildUnknownReasons(job.getFullDisplayName());
            if (job instanceof ParameterizedJobMixIn.ParameterizedJob && ((ParameterizedJobMixIn.ParameterizedJob) job).isDisabled()) {
                msg = Messages.BuildCommand_CLICause_CannotBuildDisabled(job.getFullDisplayName());
            } else if (job.isHoldOffBuildUntilSave()){
                msg = Messages.BuildCommand_CLICause_CannotBuildConfigNotSaved(job.getFullDisplayName());
            }
            throw new IllegalStateException(msg);
        }

        Queue.Item item = ParameterizedJobMixIn.scheduleBuild2(job, 0, new CauseAction(new CLICause(Jenkins.getAuthentication2().getName())), a);
        QueueTaskFuture<? extends Run<?,?>> f = item != null ? (QueueTaskFuture)item.getFuture() : null;
        
        if (wait || sync || follow) {
            if (f == null) {
                throw new IllegalStateException(BUILD_SCHEDULING_REFUSED);
            }
            Run<?,?> b = f.waitForStart();    // wait for the start
            stdout.println("Started "+b.getFullDisplayName());
            stdout.flush();

            if (sync || follow) {
                try {
                    if (consoleOutput) {
                        // read output in a retry loop, by default try only once
                        // writeWholeLogTo may fail with FileNotFound
                        // exception on a slow/busy machine, if it takes
                        // longish to create the log file
                        int retryInterval = 100;
                        for (int i=0;i<=retryCnt;) {
                            try {
                                b.writeWholeLogTo(stdout);
                                break;
                            }
                            catch (FileNotFoundException | NoSuchFileException e) {
                                if ( i == retryCnt ) {
                                    Exception myException = new AbortException();
                                    myException.initCause(e);
                                    throw myException;
                                }
                                i++;
                                Thread.sleep(retryInterval);
                            }
                        }
                    }
                    f.get();    // wait for the completion
                    stdout.println("Completed "+b.getFullDisplayName()+" : "+b.getResult());
                    return b.getResult().ordinal;
                } catch (InterruptedException e) {
                    if (follow) {
                        return 125;
                    } else {
                        // if the CLI is aborted, try to abort the build as well
                        f.cancel(true);
                        Exception myException = new AbortException();
                        myException.initCause(e);
                        throw myException;
                    }
                }
            }
        }

        return 0;
    }

    @Override
    protected void printUsageSummary(PrintStream stderr) {
        stderr.println(
            "Starts a build, and optionally waits for a completion.\n" +
            "Aside from general scripting use, this command can be\n" +
            "used to invoke another job from within a build of one job.\n" +
            "With the -s option, this command changes the exit code based on\n" +
            "the outcome of the build (exit code 0 indicates a success)\n" +
            "and interrupting the command will interrupt the job.\n" +
            "With the -f option, this command changes the exit code based on\n" +
            "the outcome of the build (exit code 0 indicates a success)\n" +
            "however, unlike -s, interrupting the command will not interrupt\n" +
            "the job (exit code 125 indicates the command was interrupted).\n" +
            "With the -c option, a build will only run if there has been\n" +
            "an SCM change."
        );
    }

    public static class CLICause extends UserIdCause {

    	private String startedBy;

    	public CLICause(){
    		startedBy = "unknown";
    	}

    	public CLICause(String startedBy){
    		this.startedBy = startedBy;
    	}

        @Override
        public String getShortDescription() {
            User user = User.getById(startedBy, false);
            String userName = user != null ? user.getDisplayName() : startedBy;
            return Messages.BuildCommand_CLICause_ShortDescription(userName);
        }

        @Override
        public void print(TaskListener listener) {
            listener.getLogger().println(Messages.BuildCommand_CLICause_ShortDescription(
                    ModelHyperlinkNote.encodeTo("/user/" + startedBy, startedBy)));
        }

        @Override
        public boolean equals(Object o) {
            return o instanceof CLICause;
        }

        @Override
        public int hashCode() {
            return 7;
        }
    }
}
