/**
 * @author john19696 [john19696@protonmail.com]
 * @copyright Crown Copyright 2021
 * @license Apache-2.0
 */

import Operation from "../Operation.mjs";
// import OperationError from "../errors/OperationError.mjs";

/**
 * Escape Smart Characters operation
 */
class EscapeSmartCharacters extends Operation {

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

        this.name = "Escape Smart Characters";
        this.module = "Default";
        this.description = "An operation to convert smart characters (quotes, dashes, apostrophes, \
            arrows, copyright signs, ellipses etc.) back to plain ASCII.\
            <br>";
        this.infoURL = "http://unicode.scarfboy.com/?s=quotation+mark";
        this.inputType = "string";
        this.outputType = "string";
        this.args = [
            /* Arguments. See the project wiki for full details.*/
            {
                name: "Second arg",
                type: "option",
                value: ["Escape", "Remove", "Replace with '.'"]
            }
        ];
    }


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

        /* JSON map of characters to escape
           generated by EscapeSmartCharacters.xls in doc
           */
        const ESCAPE_MAP = {
            // Pasted from git:/doc/SmartEscape.xlsx
            "‘": "'",
            "’": "'",
            "“": "\"",
            "”": "\"",
            "©": "(C)",
            "®": "(R)",
            "™": "(TM)",
            "→": "-->",
            "←": "<--",
            "↔": "<->",
            "‐": "-",
            "‑": "-",
            "‒": "-",
            "–": "-",
            "—": "--",
            "―": "--",
            "‖": "||",
            "‗": "==",
            "‘": "'",
            "’": "'",
            "‚": "'",
            "‛": "'",
            "“": "\"",
            "”": "\"",
            "„": "\"",
            "‟": "\"",
            "•": ".",
            "‣": ">",
            "․": ".",
            "‥": "..",
            "…": "...",
            "‧": ".",
            "‰": "%0",
            "‱": "%00",
            "′": "'",
            "″": "''",
            "‴": "'''",
            "‵": "''",
            "‶": "''",
            "‷": "'''",
            "‸": "^",
            "‹": "<",
            "›": ">",
            "‼": "!!",
            "‽": "?!",
            "⁃": "-",
            "⁄": "/",
            "⁅": "[-",
            "⁆": "-]",
            "⁇": "??",
            "⁈": "?!",
            "⁉": "!?",
            "⁌": ".",
            "⁍": ".",
            "⁎": "*",
            "⁏": ";",
            "⁒": "%",
            "⁓": "~",
            "⁕": "*",
            "⁗": "''''",
            "⁢": "*",
            "⁤": "+",
        };

        let output, result = "";
        for (const char of input) {
            if (Object.keys(ESCAPE_MAP).includes(char)) {
                output = ESCAPE_MAP[char];
            } else {
                // Do Something Sensible with the rest of the arrows
                const charCode = char.charCodeAt(0);
                if (charCode >= 8592 && charCode <= 8703)  {
                    output = "->";
                } else {
                    output = char;
                }
            }
            if (output == char) {
                result += output;
            } else {
                switch (outArg) {
                    case "Remove":
                        break;
                    case "Replace with '.'":
                        result += ".";
                        break;
                    default: { // Escape & no change are the same
                        result += output;
                    }
                }
            }
        }
        return result;
    }

}

export default EscapeSmartCharacters;