/* *
 *
 *  Accessibility module - internationalization support
 *
 *  (c) 2010-2026 Highsoft AS
 *  Author: Øystein Moseng
 *
 *  A commercial license may be required depending on use.
 *  See www.highcharts.com/license
 *
 *
 * */
'use strict';
import F from '../Core/Templating.js';
const { format } = F;
import U from '../Core/Utilities.js';
const { getNestedProperty, pick } = U;
/* *
 *
 *  Composition
 *
 * */
var A11yI18nComposition;
(function (A11yI18nComposition) {
    /* *
     *
     *  Declarations
     *
     * */
    /* *
     *
     *  Functions
     *
     * */
    /**
     * @private
     */
    function compose(ChartClass) {
        const chartProto = ChartClass.prototype;
        if (!chartProto.langFormat) {
            chartProto.langFormat = langFormat;
        }
    }
    A11yI18nComposition.compose = compose;
    /**
     * I18n utility function.  Format a single array or plural statement in a
     * format string.  If the statement is not an array or plural statement,
     * returns the statement within brackets.  Invalid array statements return
     * an empty string.
     *
     * @private
     * @function formatExtendedStatement
     * @param {string} statement
     * @param {Highcharts.Dictionary<*>} ctx
     * Context to apply to the format string.
     */
    function formatExtendedStatement(statement, ctx) {
        const eachStart = statement.indexOf('#each('), pluralStart = statement.indexOf('#plural('), indexStart = statement.indexOf('['), indexEnd = statement.indexOf(']');
        let arr, result;
        // Dealing with an each-function?
        if (eachStart > -1) {
            const eachEnd = statement.slice(eachStart).indexOf(')') + eachStart, preEach = statement.substring(0, eachStart), postEach = statement.substring(eachEnd + 1), eachStatement = statement.substring(eachStart + 6, eachEnd), eachArguments = eachStatement.split(',');
            let lenArg = Number(eachArguments[1]), len;
            result = '';
            arr = getNestedProperty(eachArguments[0], ctx);
            if (arr) {
                lenArg = isNaN(lenArg) ? arr.length : lenArg;
                len = lenArg < 0 ?
                    arr.length + lenArg :
                    Math.min(lenArg, arr.length); // Overshoot
                // Run through the array for the specified length
                for (let i = 0; i < len; ++i) {
                    result += preEach + arr[i] + postEach;
                }
            }
            return result.length ? result : '';
        }
        // Dealing with a plural-function?
        if (pluralStart > -1) {
            const pluralEnd = (statement.slice(pluralStart).indexOf(')') + pluralStart), pluralStatement = statement.substring(pluralStart + 8, pluralEnd), pluralArguments = pluralStatement.split(','), num = Number(getNestedProperty(pluralArguments[0], ctx));
            switch (num) {
                case 0:
                    result = pick(pluralArguments[4], pluralArguments[1]);
                    break;
                case 1:
                    result = pick(pluralArguments[2], pluralArguments[1]);
                    break;
                case 2:
                    result = pick(pluralArguments[3], pluralArguments[1]);
                    break;
                default:
                    result = pluralArguments[1];
            }
            return result ? stringTrim(result) : '';
        }
        // Array index
        if (indexStart > -1) {
            const arrayName = statement.substring(0, indexStart), ix = Number(statement.substring(indexStart + 1, indexEnd));
            let val;
            arr = getNestedProperty(arrayName, ctx);
            if (!isNaN(ix) && arr) {
                if (ix < 0) {
                    val = arr[arr.length + ix];
                    // Handle negative overshoot
                    if (typeof val === 'undefined') {
                        val = arr[0];
                    }
                }
                else {
                    val = arr[ix];
                    // Handle positive overshoot
                    if (typeof val === 'undefined') {
                        val = arr[arr.length - 1];
                    }
                }
            }
            return typeof val !== 'undefined' ? val : '';
        }
        // Standard substitution, delegate to format or similar
        return '{' + statement + '}';
    }
    /* eslint-disable max-len */
    /**
     * i18n formatting function.  Extends Highcharts.format() functionality by
     * also handling arrays and plural conditionals.  Arrays can be indexed as
     * follows:
     *
     * - Format: 'This is the first index: {myArray[0]}. The last: {myArray[-1]}.'
     *
     * - Context: { myArray: [0, 1, 2, 3, 4, 5] }
     *
     * - Result: 'This is the first index: 0. The last: 5.'
     *
     *
     * They can also be iterated using the #each() function.  This will repeat
     * the contents of the bracket expression for each element.  Example:
     *
     * - Format: 'List contains: {#each(myArray)cm }'
     *
     * - Context: { myArray: [0, 1, 2] }
     *
     * - Result: 'List contains: 0cm 1cm 2cm '
     *
     *
     * The #each() function optionally takes a length parameter.  If positive,
     * this parameter specifies the max number of elements to iterate through.
     * If negative, the function will subtract the number from the length of the
     * array.  Use this to stop iterating before the array ends.  Example:
     *
     * - Format: 'List contains: {#each(myArray, -1), }and {myArray[-1]}.'
     *
     * - Context: { myArray: [0, 1, 2, 3] }
     *
     * - Result: 'List contains: 0, 1, 2, and 3.'
     *
     *
     * Use the #plural() function to pick a string depending on whether or not a
     * context object is 1.  Arguments are #plural(obj, plural, singular).
     * Example:
     *
     * - Format: 'Has {numPoints} {#plural(numPoints, points, point}.'
     *
     * - Context: { numPoints: 5 }
     *
     * - Result: 'Has 5 points.'
     *
     *
     * Optionally there are additional parameters for dual and none:
     * #plural(obj, plural, singular, dual, none).  Example:
     *
     * - Format: 'Has {#plural(numPoints, many points, one point, two points,
     *   none}.'
     *
     * - Context: { numPoints: 2 }
     *
     * - Result: 'Has two points.'
     *
     *
     * The dual or none parameters will take precedence if they are supplied.
     *
     * @requires modules/accessibility
     *
     * @function Highcharts.i18nFormat
     *
     * @param {string} formatString
     * The string to format.
     *
     * @param {Highcharts.Dictionary<*>} context
     * Context to apply to the format string.
     *
     * @param {Highcharts.Chart} chart
     * A `Chart` instance with a time object and numberFormatter, passed on to
     * format().
     *
     * @deprecated
     *
     * @return {string}
     * The formatted string.
     */
    function i18nFormat(formatString, context, chart) {
        const getFirstBracketStatement = (sourceStr, offset) => {
            const str = sourceStr.slice(offset || 0), startBracket = str.indexOf('{'), endBracket = str.indexOf('}');
            if (startBracket > -1 && endBracket > startBracket) {
                return {
                    statement: str.substring(startBracket + 1, endBracket),
                    begin: offset + startBracket + 1,
                    end: offset + endBracket
                };
            }
        }, tokens = [];
        let bracketRes, constRes, cursor = 0;
        // Tokenize format string into bracket statements and constants
        do {
            bracketRes = getFirstBracketStatement(formatString, cursor);
            constRes = formatString.substring(cursor, bracketRes && bracketRes.begin - 1);
            // If we have constant content before this bracket statement, add it
            if (constRes.length) {
                tokens.push({
                    value: constRes,
                    type: 'constant'
                });
            }
            // Add the bracket statement
            if (bracketRes) {
                tokens.push({
                    value: bracketRes.statement,
                    type: 'statement'
                });
            }
            cursor = bracketRes ? bracketRes.end + 1 : cursor + 1;
        } while (bracketRes);
        // Perform the formatting.  The formatArrayStatement function returns
        // the statement in brackets if it is not an array statement, which
        // means it gets picked up by format below.
        tokens.forEach((token) => {
            if (token.type === 'statement') {
                token.value = formatExtendedStatement(token.value, context);
            }
        });
        // Join string back together and pass to format to pick up non-array
        // statements.
        return format(tokens.reduce((acc, cur) => acc + cur.value, ''), context, chart);
    }
    A11yI18nComposition.i18nFormat = i18nFormat;
    /* eslint-enable max-len */
    /**
     * Apply context to a format string from lang options of the chart.
     *
     * @requires modules/accessibility
     *
     * @function Highcharts.Chart#langFormat
     *
     * @param {string} langKey
     * Key (using dot notation) into lang option structure.
     *
     * @param {Highcharts.Dictionary<*>} context
     * Context to apply to the format string.
     *
     * @return {string}
     * The formatted string.
     */
    function langFormat(langKey, context) {
        const keys = langKey.split('.');
        let formatString = this.options.lang, i = 0;
        for (; i < keys.length; ++i) {
            formatString = formatString && formatString[keys[i]];
        }
        return typeof formatString === 'string' ?
            i18nFormat(formatString, context, this) : '';
    }
    /**
     * @private
     * @function stringTrim
     *
     * @param {string} str
     * The input string
     *
     * @return {string}
     * The trimmed string
     */
    function stringTrim(str) {
        return str.trim && str.trim() || str.replace(/^\s+|\s+$/g, '');
    }
})(A11yI18nComposition || (A11yI18nComposition = {}));
/* *
 *
 *  Default Export
 *
 * */
export default A11yI18nComposition;
