/*
 * Copyright (c) 2010 The Broad Institute
 *
 * 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 org.broadinstitute.sting.gatk.arguments;

import net.sf.samtools.SAMFileReader;
import org.broadinstitute.sting.gatk.phonehome.GATKRunReport;
import org.broadinstitute.sting.utils.StingException;
import org.broadinstitute.sting.utils.interval.IntervalMergingRule;
import org.broadinstitute.sting.commandline.Argument;
import org.broadinstitute.sting.commandline.Input;
import org.broadinstitute.sting.gatk.DownsampleType;
import org.broadinstitute.sting.gatk.DownsamplingMethod;
import org.broadinstitute.sting.utils.interval.IntervalSetRule;
import org.simpleframework.xml.*;
import org.simpleframework.xml.core.Persister;
import org.simpleframework.xml.stream.Format;
import org.simpleframework.xml.stream.HyphenStyle;

import java.io.File;
import java.io.InputStream;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * @author aaron
 * @version 1.0
 */
@Root
public class GATKArgumentCollection {

    /* our version number */
    private float versionNumber = 1;
    private String description = "GATK Arguments";

    /** the constructor */
    public GATKArgumentCollection() {
    }

    @ElementMap(entry = "analysis_argument", key = "key", attribute = true, inline = true, required = false)
    public Map<String, String> walkerArgs = new HashMap<String, String>();

    // parameters and their defaults
    @ElementList(required = false)
    @Input(fullName = "input_file", shortName = "I", doc = "SAM or BAM file(s)", required = false)
    public List<File> samFiles = new ArrayList<File>();

    @Element(required = false)
    @Argument(fullName = "read_buffer_size", shortName = "rbs", doc="Number of reads per SAM file to buffer in memory", required = false)
    public Integer readBufferSize = null;

    @Element(required = false)
    @Argument(fullName = "phone_home", shortName = "et", doc="What kind of GATK run report should we generate?  Standard is the default, can be verbose or NO_ET so nothing is posted to the run repository", required = false)
    public GATKRunReport.PhoneHomeOption phoneHomeType = GATKRunReport.PhoneHomeOption.NO_ET;

    @ElementList(required = false)
    @Argument(fullName = "read_filter", shortName = "rf", doc = "Specify filtration criteria to apply to each read individually.", required = false)
    public List<String> readFilters = new ArrayList<String>();

    @ElementList(required = false)
    @Input(fullName = "intervals", shortName = "L", doc = "A list of genomic intervals over which to operate. Can be explicitly specified on the command line or in a file.", required = false)
    public List<String> intervals = null;

    @ElementList(required = false)
    @Input(fullName = "excludeIntervals", shortName = "XL", doc = "A list of genomic intervals to exclude from processing. Can be explicitly specified on the command line or in a file.", required = false)
    public List<String> excludeIntervals = null;

    @Element(required = false)
    @Input(fullName = "reference_sequence", shortName = "R", doc = "Reference sequence file", required = false)
    public File referenceFile = null;

    @ElementList(required = false)
    @Input(fullName = "rodBind", shortName = "B", doc = "Bindings for reference-ordered data, in the form <name>,<type>,<file>", required = false)
    public ArrayList<String> RODBindings = new ArrayList<String>();

    @Element(required = false)
    @Argument(fullName = "rodToIntervalTrackName", shortName = "BTI", doc = "Indicates that the named track should be converted into an interval list, to drive the traversal", required = false)
    public String RODToInterval = null;

    @Element(required = false)
    @Argument(fullName = "BTI_merge_rule", shortName = "BTIMR", doc = "Indicates the merging approach the interval parser should use to combine the BTI track with other -L options", required = false)
    public IntervalSetRule BTIMergeRule = IntervalSetRule.UNION;

    @Element(required = false)
    @Input(fullName = "DBSNP", shortName = "D", doc = "DBSNP file", required = false)
    public String DBSNPFile = null;

    /**
     * The override mechanism in the GATK, by default, populates the command-line arguments, then
     * the defaults from the walker annotations.  Unfortunately, walker annotations should be trumped
     * by a user explicitly specifying command-line arguments.
     * TODO: Change the GATK so that walker defaults are loaded first, then command-line arguments.
     */
    private static DownsampleType DEFAULT_DOWNSAMPLING_TYPE = DownsampleType.BY_SAMPLE;
    private static int DEFAULT_DOWNSAMPLING_COVERAGE = 1000;

    @Element(required = false)
    @Argument(fullName = "downsampling_type", shortName="dt", doc="Type of reads downsampling to employ at a given locus.  Reads will be selected randomly to be removed from the pile based on the method described here.", required = false)
    public DownsampleType downsamplingType = null;

    @Element(required = false)
    @Argument(fullName = "downsample_to_fraction", shortName = "dfrac", doc = "Fraction [0.0-1.0] of reads to downsample to", required = false)
    public Double downsampleFraction = null;

    @Element(required = false)
    @Argument(fullName = "downsample_to_coverage", shortName = "dcov", doc = "Coverage [integer] to downsample to at any given locus; note that downsampled reads are randomly selected from all possible reads at a locus (use max_reads_at_locus to stop the engine from reading in all reads)", required = false)
    public Integer downsampleCoverage = null;

    /**
     * Gets the downsampling method explicitly specified by the user.  If the user didn't specify
     * a default downsampling mechanism, return null.
     * @return The explicitly specified downsampling mechanism, or null if none exists.
     */
    public DownsamplingMethod getDownsamplingMethod() {
        if(downsamplingType == null && downsampleFraction == null && downsampleCoverage == null)
            return null;
        if(downsamplingType == null && downsampleCoverage != null)
            return new DownsamplingMethod(DEFAULT_DOWNSAMPLING_TYPE,downsampleCoverage,null);
        return new DownsamplingMethod(downsamplingType,downsampleCoverage,downsampleFraction);
    }

    /**
     * Gets the default downsampling method, returned if the user didn't specify any downsampling
     * method.
     * @return The default downsampling mechanism, or null if none exists.
     */
    public DownsamplingMethod getDefaultDownsamplingMethod() {
        return new DownsamplingMethod(DEFAULT_DOWNSAMPLING_TYPE,DEFAULT_DOWNSAMPLING_COVERAGE,null);
    }

    @Element(required = false)
    @Argument(fullName="useOriginalQualities", shortName = "OQ", doc = "If set, use the original base quality scores from the OQ tag when present instead of the standard scores", required=false)
    public Boolean useOriginalBaseQualities = false;

    @Element(required = false)
    @Argument(fullName = "validation_strictness", shortName = "S", doc = "How strict should we be with validation", required = false)
    public SAMFileReader.ValidationStringency strictnessLevel = SAMFileReader.ValidationStringency.SILENT;

    @Element(required = false)
    @Argument(fullName = "unsafe", shortName = "U", doc = "If set, enables unsafe operations: nothing will be checked at runtime.  For expert users only who know what they are doing.  We do not support usage of this argument.", required = false)
    public ValidationExclusion.TYPE unsafe;

    /** How many threads should be allocated to this analysis. */
    @Element(required = false)
    @Argument(fullName = "num_threads", shortName = "nt", doc = "How many threads should be allocated to running this analysis.", required = false)
    public int numberOfThreads = 1;

    /** What rule should we use when merging intervals */
    @Element(required = false)
    @Argument(fullName = "interval_merging", shortName = "im", doc = "What interval merging rule should we use.", required = false)
    public IntervalMergingRule intervalMerging = IntervalMergingRule.ALL;

    @ElementList(required = false)
    @Input(fullName = "read_group_black_list", shortName="rgbl", doc="Filters out read groups matching <TAG>:<STRING> or a .txt file containing the filter strings one per line.", required = false)
    public List<String> readGroupBlackList = null;

    /**
     * marshal the data out to a object
     *
     * @param collection the GATKArgumentCollection to load into
     * @param outputFile the file to write to
     */
    public static void marshal(GATKArgumentCollection collection, String outputFile) {
        Serializer serializer = new Persister(new Format(new HyphenStyle()));
        File result = new File(outputFile);
        try {
            serializer.write(collection, result);
        } catch (Exception e) {
            throw new StingException("Failed to marshal the data to the file " + outputFile, e);
        }
    }

    /**
     * marshal the data out to a object
     *
     * @param collection the GATKArgumentCollection to load into
     * @param outputFile the stream to write to
     */
    public static void marshal(GATKArgumentCollection collection, PrintStream outputFile) {
        Serializer serializer = new Persister(new Format(new HyphenStyle()));
        try {
            serializer.write(collection, outputFile);
        } catch (Exception e) {
            throw new StingException("Failed to marshal the data to the file " + outputFile, e);
        }
    }

    /**
     * unmashall the object from a configuration file
     *
     * @param filename the filename to marshal from
     */
    public static GATKArgumentCollection unmarshal(String filename) {
        Serializer serializer = new Persister(new Format(new HyphenStyle()));
        File source = new File(filename);
        try {
            GATKArgumentCollection example = serializer.read(GATKArgumentCollection.class, source);
            return example;
        } catch (Exception e) {
            throw new StingException("Failed to marshal the data from file " + filename, e);
        }
    }

    /**
     * unmashall the object from a configuration file
     *
     * @param file the inputstream to marshal from
     */
    public static GATKArgumentCollection unmarshal(InputStream file) {
        Serializer serializer = new Persister(new Format(new HyphenStyle()));
        try {
            GATKArgumentCollection example = serializer.read(GATKArgumentCollection.class, file);
            return example;
        } catch (Exception e) {
            throw new StingException("Failed to marshal the data from file " + file.toString(), e);
        }
    }


    /**
     * test equality between two arg collections.  This function defines the statement:
     * "not fun to write"
     *
     * @param other the other collection
     *
     * @return true if they're equal
     */
    public boolean equals(GATKArgumentCollection other) {
        if (other == null) return false;
        if (other.samFiles.size() != samFiles.size()) {
            return false;
        }
        for (int x = 0; x < samFiles.size(); x++) {
            if (!samFiles.get(x).equals(other.samFiles.get(x))) {
                return false;
            }
        }
        if (other.walkerArgs.size() != walkerArgs.size()) {
            return false;
        }
        for (String s : walkerArgs.keySet()) {
            if (!other.walkerArgs.containsKey(s)) {
                return false;
            }
        }
        if (other.RODBindings.size() != RODBindings.size()) {
            return false;
        }
        for (int x = 0; x < RODBindings.size(); x++) {
            if (!RODBindings.get(x).equals(other.RODBindings.get(x))) {
                return false;
            }
        }
        if (!other.samFiles.equals(this.samFiles)) {
            return false;
        }
        if(other.readBufferSize == null || this.readBufferSize == null) {
            // If either is null, return false if they're both null, otherwise keep going...
            if(other.readBufferSize != null || this.readBufferSize != null)
                return false;
        }
        else {
            if(!other.readBufferSize.equals(this.readBufferSize))
                return false;
        }
        if (!(other.readBufferSize == null && this.readBufferSize == null) && (other.readBufferSize == null || this.readBufferSize == null)) {
            return false;
        }
        if (!other.strictnessLevel.equals(this.strictnessLevel)) {
            return false;
        }
        if (!other.referenceFile.equals(this.referenceFile)) {
            return false;
        }
        if (!other.intervals.equals(this.intervals)) {
            return false;
        }
        if (!other.excludeIntervals.equals(this.excludeIntervals)) {
            return false;
        }
        if (!other.DBSNPFile.equals(this.DBSNPFile)) {
            return false;
        }
        if (!other.unsafe.equals(this.unsafe)) {
            return false;
        }
        if ((other.downsampleFraction == null && this.downsampleFraction != null) ||
                (other.downsampleFraction != null && !other.downsampleFraction.equals(this.downsampleFraction))) {
            return false;
        }
        if ((other.downsampleCoverage == null && this.downsampleCoverage != null) ||
                (other.downsampleCoverage != null && !other.downsampleCoverage.equals(this.downsampleCoverage))) {
            return false;
        }
        if (other.numberOfThreads != this.numberOfThreads) {
            return false;
        }
        if (other.intervalMerging != this.intervalMerging) {
            return false;
        }
        if ((other.RODToInterval == null && RODToInterval != null) ||
            (other.RODToInterval != null && !other.RODToInterval.equals(RODToInterval))) {
            return false;
        }
        if (other.phoneHomeType != this.phoneHomeType) {
            return false;
        }
        if (BTIMergeRule != other.BTIMergeRule)
                return false;

//        if (other.enableRodWalkers != this.enableRodWalkers) {
//            return false;
//        }

        return true;
    }

}