import { matchAnyPattern, repeatedTimeunitPattern } from "../../utils/pattern";
import { Timeunit } from "../../types";

export const WEEKDAY_DICTIONARY: { [word: string]: number } = {
    "dimanche": 0,
    "dim": 0,
    "lundi": 1,
    "lun": 1,
    "mardi": 2,
    "mar": 2,
    "mercredi": 3,
    "mer": 3,
    "jeudi": 4,
    "jeu": 4,
    "vendredi": 5,
    "ven": 5,
    "samedi": 6,
    "sam": 6,
};

export const MONTH_DICTIONARY: { [word: string]: number } = {
    "janvier": 1,
    "jan": 1,
    "jan.": 1,
    "février": 2,
    "fév": 2,
    "fév.": 2,
    "fevrier": 2,
    "fev": 2,
    "fev.": 2,
    "mars": 3,
    "mar": 3,
    "mar.": 3,
    "avril": 4,
    "avr": 4,
    "avr.": 4,
    "mai": 5,
    "juin": 6,
    "jun": 6,
    "juillet": 7,
    "juil": 7,
    "jul": 7,
    "jul.": 7,
    "août": 8,
    "aout": 8,
    "septembre": 9,
    "sep": 9,
    "sep.": 9,
    "sept": 9,
    "sept.": 9,
    "octobre": 10,
    "oct": 10,
    "oct.": 10,
    "novembre": 11,
    "nov": 11,
    "nov.": 11,
    "décembre": 12,
    "decembre": 12,
    "dec": 12,
    "dec.": 12,
};

export const INTEGER_WORD_DICTIONARY: { [word: string]: number } = {
    "un": 1,
    "deux": 2,
    "trois": 3,
    "quatre": 4,
    "cinq": 5,
    "six": 6,
    "sept": 7,
    "huit": 8,
    "neuf": 9,
    "dix": 10,
    "onze": 11,
    "douze": 12,
    "treize": 13,
};

export const TIME_UNIT_DICTIONARY: { [word: string]: Timeunit } = {
    "sec": "second",
    "seconde": "second",
    "secondes": "second",
    "min": "minute",
    "mins": "minute",
    "minute": "minute",
    "minutes": "minute",
    "h": "hour",
    "hr": "hour",
    "hrs": "hour",
    "heure": "hour",
    "heures": "hour",
    "jour": "day",
    "jours": "day",
    "semaine": "week",
    "semaines": "week",
    "mois": "month",
    "trimestre": "quarter",
    "trimestres": "quarter",
    "ans": "year",
    "année": "year",
    "années": "year",
};

//-----------------------------

export const NUMBER_PATTERN = `(?:${matchAnyPattern(
    INTEGER_WORD_DICTIONARY
)}|[0-9]+|[0-9]+\\.[0-9]+|une?\\b|quelques?|demi-?)`;

export function parseNumberPattern(match: string): number {
    const num = match.toLowerCase();
    if (INTEGER_WORD_DICTIONARY[num] !== undefined) {
        return INTEGER_WORD_DICTIONARY[num];
    } else if (num === "une" || num === "un") {
        return 1;
    } else if (num.match(/quelques?/)) {
        return 3;
    } else if (num.match(/demi-?/)) {
        return 0.5;
    }

    return parseFloat(num);
}

//-----------------------------

export const ORDINAL_NUMBER_PATTERN = `(?:[0-9]{1,2}(?:er)?)`;
export function parseOrdinalNumberPattern(match: string): number {
    let num = match.toLowerCase();
    num = num.replace(/(?:er)$/i, "");
    return parseInt(num);
}

//-----------------------------
// 88 p. Chr. n.
// 234 AC
export const YEAR_PATTERN = `(?:[1-9][0-9]{0,3}\\s*(?:AC|AD|p\\.\\s*C(?:hr?)?\\.\\s*n\\.)|[1-2][0-9]{3}|[5-9][0-9])`;
export function parseYear(match: string): number {
    if (/AC/i.test(match)) {
        match = match.replace(/BC/i, "");
        return -parseInt(match);
    }

    if (/AD/i.test(match) || /C/i.test(match)) {
        match = match.replace(/[^\d]+/i, "");
        return parseInt(match);
    }

    let yearNumber = parseInt(match);
    if (yearNumber < 100) {
        if (yearNumber > 50) {
            yearNumber = yearNumber + 1900;
        } else {
            yearNumber = yearNumber + 2000;
        }
    }

    return yearNumber;
}

//-----------------------------

const SINGLE_TIME_UNIT_PATTERN = `(${NUMBER_PATTERN})\\s{0,5}(${matchAnyPattern(TIME_UNIT_DICTIONARY)})\\s{0,5}`;
const SINGLE_TIME_UNIT_REGEX = new RegExp(SINGLE_TIME_UNIT_PATTERN, "i");

export const TIME_UNITS_PATTERN = repeatedTimeunitPattern("", SINGLE_TIME_UNIT_PATTERN);

import { Duration } from "../../calculation/duration";
export function parseDuration(timeunitText): Duration {
    const fragments = {};
    let remainingText = timeunitText;
    let match = SINGLE_TIME_UNIT_REGEX.exec(remainingText);
    while (match) {
        collectDateTimeFragment(fragments, match);
        remainingText = remainingText.substring(match[0].length);
        match = SINGLE_TIME_UNIT_REGEX.exec(remainingText);
    }
    return fragments as Duration;
}

function collectDateTimeFragment(fragments, match) {
    const num = parseNumberPattern(match[1]);
    const unit = TIME_UNIT_DICTIONARY[match[2].toLowerCase()];
    fragments[unit] = num;
}