/**
 * @author n1474335 [n1474335@gmail.com]
 * @copyright Crown Copyright 2016
 * @license Apache-2.0
 */

import Operation from "../Operation";

/**
 * To Upper case operation
 */
class ToUpperCase extends Operation {

    /**
     * ToUpperCase constructor
     */
    constructor() {
        super();

        this.name = "To Upper case";
        this.module = "Default";
        this.description = "Converts the input string to upper case, optionally limiting scope to only the first character in each word, sentence or paragraph.";
        this.inputType = "string";
        this.outputType = "string";
        this.args = [
            {
                "name": "Scope",
                "type": "option",
                "value": ["All", "Word", "Sentence", "Paragraph"]
            }
        ];
    }

    /**
     * @param {string} input
     * @param {Object[]} args
     * @returns {string}
     */
    run(input, args) {
        const scope = args[0];

        switch (scope) {
            case "Word":
                return input.replace(/(\b\w)/gi, function(m) {
                    return m.toUpperCase();
                });
            case "Sentence":
                return input.replace(/(?:\.|^)\s*(\b\w)/gi, function(m) {
                    return m.toUpperCase();
                });
            case "Paragraph":
                return input.replace(/(?:\n|^)\s*(\b\w)/gi, function(m) {
                    return m.toUpperCase();
                });
            case "All": /* falls through */
            default:
                return input.toUpperCase();
        }
    }

    /**
     * Highlight To Upper case
     *
     * @param {Object[]} pos
     * @param {number} pos[].start
     * @param {number} pos[].end
     * @param {Object[]} args
     * @returns {Object[]} pos
     */
    highlight(pos, args) {
        return pos;
    }

    /**
     * Highlight To Upper case in reverse
     *
     * @param {Object[]} pos
     * @param {number} pos[].start
     * @param {number} pos[].end
     * @param {Object[]} args
     * @returns {Object[]} pos
     */
    highlightReverse(pos, args) {
        return pos;
    }

}

export default ToUpperCase;