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// SPDX-License-Identifier: BSD-3-Clause
package org.islandoftex.arara.ruleset

import java.io.File
import org.islandoftex.arara.Arara
import org.islandoftex.arara.configuration.AraraSpec
import org.islandoftex.arara.utils.CommonUtils

/**
 * Implements a command model, containing a list of strings.
 *
 * @author Island of TeX
 * @version 5.0
 * @since 4.0
 */
class Command {
    /**
     * A list of elements which are components
     * of a command and represented as strings
     */
    val elements: List<String>

    /**
     * An optional file acting as a reference for
     * the default working directory
     */
    var workingDirectory: File = Arara.config[AraraSpec.Execution
            .workingDirectory].toFile()

    /**
     * Constructor.
     * @param values An array of objects.
     */
    constructor(vararg values: Any) {
        elements = mutableListOf()
        val result = CommonUtils.flatten(values.toList())
        result.map { it.toString() }.filter { it.isNotEmpty() }
                .forEach { elements.add(it) }
    }

    /**
     * Constructor.
     * @param elements A list of strings.
     */
    constructor(elements: List<String>) {
        this.elements = elements
    }

    /**
     * Provides a textual representation of the current command.
     * @return A string representing the current command.
     */
    override fun toString(): String {
        return "[ " + elements.joinToString(", ") + " ]" +
                " @ $workingDirectory"
    }
}