import { BadOptionError, BadStemError, MaskedValueError } from '../errors.js';
import { isNumberingSystem } from '../types/skeleton.js';
import { isUnit } from '../types/unit.js';
import { validOptions } from './options.js';
import { parsePrecisionBlueprint } from './parse-precision-blueprint.js';
/** @internal */
export class TokenParser {
    constructor(onError) {
        this.skeleton = {};
        this.onError = onError;
    }
    badOption(stem, opt) {
        this.onError(new BadOptionError(stem, opt));
    }
    assertEmpty(key) {
        const prev = this.skeleton[key];
        if (prev)
            this.onError(new MaskedValueError(key, prev));
    }
    parseToken(stem, options) {
        if (!validOptions(stem, options, this.onError))
            return;
        const option = options[0];
        const res = this.skeleton;
        switch (stem) {
            // notation
            case 'compact-short':
            case 'compact-long':
            case 'notation-simple':
                this.assertEmpty('notation');
                res.notation = { style: stem };
                break;
            case 'scientific':
            case 'engineering': {
                let expDigits = null;
                let expSign = undefined;
                for (const opt of options) {
                    switch (opt) {
                        case 'sign-auto':
                        case 'sign-always':
                        case 'sign-never':
                        case 'sign-accounting':
                        case 'sign-accounting-always':
                        case 'sign-except-zero':
                        case 'sign-accounting-except-zero':
                            expSign = opt;
                            break;
                        default:
                            if (/^\+e+$/.test(opt))
                                expDigits = opt.length - 1;
                            else {
                                this.badOption(stem, opt);
                            }
                    }
                }
                this.assertEmpty('notation');
                const source = options.join('/');
                res.notation =
                    expDigits && expSign
                        ? { style: stem, source, expDigits, expSign }
                        : expDigits
                            ? { style: stem, source, expDigits }
                            : expSign
                                ? { style: stem, source, expSign }
                                : { style: stem, source };
                break;
            }
            // unit
            case 'percent':
            case 'permille':
            case 'base-unit':
                this.assertEmpty('unit');
                res.unit = { style: stem };
                break;
            case 'currency':
                if (/^[A-Z]{3}$/.test(option)) {
                    this.assertEmpty('unit');
                    res.unit = { style: stem, currency: option };
                }
                else
                    this.badOption(stem, option);
                break;
            case 'measure-unit': {
                if (isUnit(option)) {
                    this.assertEmpty('unit');
                    res.unit = { style: stem, unit: option };
                }
                else
                    this.badOption(stem, option);
                break;
            }
            // unitPer
            case 'per-measure-unit': {
                if (isUnit(option)) {
                    this.assertEmpty('unitPer');
                    res.unitPer = option;
                }
                else
                    this.badOption(stem, option);
                break;
            }
            // unitWidth
            case 'unit-width-narrow':
            case 'unit-width-short':
            case 'unit-width-full-name':
            case 'unit-width-iso-code':
            case 'unit-width-hidden':
                this.assertEmpty('unitWidth');
                res.unitWidth = stem;
                break;
            // precision
            case 'precision-integer':
            case 'precision-unlimited':
            case 'precision-currency-cash':
                this.assertEmpty('precision');
                res.precision = { style: stem };
                break;
            case 'precision-currency-standard':
                this.assertEmpty('precision');
                if (option === 'w') {
                    res.precision = { style: stem, trailingZero: 'stripIfInteger' };
                }
                else {
                    res.precision = { style: stem };
                }
                break;
            case 'precision-increment': {
                const increment = Number(option);
                if (increment > 0) {
                    this.assertEmpty('precision');
                    res.precision = { style: stem, increment };
                }
                else
                    this.badOption(stem, option);
                break;
            }
            // roundingMode
            case 'rounding-mode-ceiling':
            case 'rounding-mode-floor':
            case 'rounding-mode-down':
            case 'rounding-mode-up':
            case 'rounding-mode-half-even':
            case 'rounding-mode-half-odd':
            case 'rounding-mode-half-ceiling':
            case 'rounding-mode-half-floor':
            case 'rounding-mode-half-down':
            case 'rounding-mode-half-up':
            case 'rounding-mode-unnecessary':
                this.assertEmpty('roundingMode');
                res.roundingMode = stem;
                break;
            // integerWidth
            case 'integer-width': {
                if (/^\+0*$/.test(option)) {
                    this.assertEmpty('integerWidth');
                    res.integerWidth = { source: option, min: option.length - 1 };
                }
                else {
                    const m = option.match(/^#*(0*)$/);
                    if (m) {
                        this.assertEmpty('integerWidth');
                        res.integerWidth = {
                            source: option,
                            min: m[1].length,
                            max: m[0].length
                        };
                    }
                    else
                        this.badOption(stem, option);
                }
                break;
            }
            // scale
            case 'scale': {
                const scale = Number(option);
                if (scale > 0) {
                    this.assertEmpty('scale');
                    res.scale = scale;
                }
                else
                    this.badOption(stem, option);
                break;
            }
            // group
            case 'group-off':
            case 'group-min2':
            case 'group-auto':
            case 'group-on-aligned':
            case 'group-thousands':
                this.assertEmpty('group');
                res.group = stem;
                break;
            // numberingSystem
            case 'latin':
                this.assertEmpty('numberingSystem');
                res.numberingSystem = 'latn';
                break;
            case 'numbering-system': {
                if (isNumberingSystem(option)) {
                    this.assertEmpty('numberingSystem');
                    res.numberingSystem = option;
                }
                else
                    this.badOption(stem, option);
                break;
            }
            // sign
            case 'sign-auto':
            case 'sign-always':
            case 'sign-never':
            case 'sign-accounting':
            case 'sign-accounting-always':
            case 'sign-except-zero':
            case 'sign-accounting-except-zero':
                this.assertEmpty('sign');
                res.sign = stem;
                break;
            // decimal
            case 'decimal-auto':
            case 'decimal-always':
                this.assertEmpty('decimal');
                res.decimal = stem;
                break;
            // precision blueprint
            default: {
                const precision = parsePrecisionBlueprint(stem, options, this.onError);
                if (precision) {
                    this.assertEmpty('precision');
                    res.precision = precision;
                }
                else {
                    this.onError(new BadStemError(stem));
                }
            }
        }
    }
}