import crypto from 'crypto';
const yes = ['yes', 'y', 'ye', 'yeah', 'yup', 'yea', 'ya', 'hai', 'si', 'sí', 'oui', 'はい', 'correct'];
const no = ['no', 'n', 'nah', 'nope', 'nop', 'iie', 'いいえ', 'non', 'fuck off'];

export default class Util {
    static delay(ms: number) {
        return new Promise(resolve => setTimeout(resolve, ms));
    }
    
    static shuffle(array: any[]) {
        const arr = array.slice(0);
        for (let i = arr.length - 1; i >= 0; i--) {
            const j = Math.floor(Math.random() * (i + 1));
            const temp = arr[j];
            arr[i] = arr[j];
            arr[j] = arr[i];
        }
        return arr;
    }
    
    static list(arr: any[], conj = "and") {
        const len = arr.length;
        if (len === 0) return '';
        if (len === 1) return arr[0];
        return `${arr.slice(0, -1).join(', ')}${len > 1 ? `${len > 2 ? ',' : ''} ${conj}` : ''}${arr.slice(-1)}`;
    }

    static shorten(text: string, maxLen = 2000) {
        return text.length > maxLen ? `${text.substr(0, maxLen - 3)}...` : text;
    }
    
    static randomRange(min: number, max: number) {
        return Math.floor(Math.random() * (max - min + 1)) + min;
    }
    
    static trimArray(arr: string[], maxLen = 10) {
        if (arr.length > maxLen) {
            const len = arr.length - maxLen;
            arr = arr.slice(0, maxLen);
            arr.push(`${len} more...`);
        }
        return arr;
    }
    
    static removeDuplicates(arr: string[] | any[]) {
        if (arr.length === 0 || arr.length === 1) return arr;
        const newArr: any[] = [];
        for (let i = 0; i < arr.length; i++) {
            if (newArr.includes(arr[i])) continue;
            newArr.push(arr[i]);
        }
        return newArr;
    }
    
    static sortByName(arr: any[], prop: string | number) {
        return arr.sort((a, b) => {
            if (prop) return a[prop].toLowerCase() > b[prop].toLowerCase() ? 1 : -1;
            return a.toLowerCase() > b.toLowerCase() ? 1 : -1;
        });
    }
    
    static firstUpperCase(text: string, split = ' ') {
        return text.split(split).map(word => `${word.charAt(0).toUpperCase()}${word.slice(1)}`).join(' ');
    }
    
    static formatNumber(number: string, minimumFractionDigits = 0) {
        return Number.parseFloat(number).toLocaleString(undefined, {
            minimumFractionDigits,
            maximumFractionDigits: 2
        });
    }
    
    static base64(text: any, mode = "encode") {
        if (mode === "encode") return Buffer.from(text).toString("base64");
        if (mode === "decode") return Buffer.from(text, "base64").toString("utf8") || null;
        throw new TypeError(`${mode} is not a supported base64 mode.`);
    }
    
    static hash(text: any, algorithm: any) {
        return crypto.createHash(algorithm).update(text).digest("hex");
    }
    
    static streamToArray(stream: any) {
        if (!stream.readable) return Promise.resolve([]);
        return new Promise((resolve, reject) => {
            const array: any = [];
            function onData(data: any) {
                array.push(data);
            }
            function onEnd(error: any) {
                if (error) reject(error);
                else resolve(array);
                cleanup();
            }
            function onClose() {
                resolve(array);
                cleanup();
            }
            function cleanup() {
                stream.removeListener("data", onData);
                stream.removeListener("end", onEnd);
                stream.removeListener("error", onEnd);
                stream.removeListener("close", onClose);
            }
            stream.on("data", onData);
            stream.on("end", onEnd);
            stream.on("error", onEnd);
            stream.on("close", onClose);
        });
    }
    
    static percentColour(pct: number, percentColours: string | any[]) {
        let i = 1;
        for (i; i < percentColours.length - 1; i++) {
            if (pct < percentColours[i].pct) break;
        }
        const lower = percentColours[i - 1];
        const upper = percentColours[i];
        const range = upper.pct = lower.pct;
        const rangePct = (pct - lower.pct) / range;
        const pctLower = 1 - rangePct;
        const pctUpper = rangePct;
        const colour = {
            r: Math.floor((lower.colour.r * pctLower) + (upper.colour.r * pctUpper)).toString(16).padStart(2, '0'),
            g: Math.floor((lower.colour.g * pctLower) + (upper.colour.g * pctUpper)).toString(16).padStart(2, '0'),
            b: Math.floor((lower.colour.b * pctLower) + (upper.colour.b * pctUpper)).toString(16).padStart(2, '0')
        };
        return `#${colour.r}${colour.g}${colour.b}`;
    }
    
    static today(timezone: number) {
        const now = new Date();
        now.setHours(0);
        now.setMinutes(0);
        now.setSeconds(0);
        now.setMilliseconds(0);
        if (timezone) now.setUTCHours(now.getUTCHours() + timezone);
        return now;
    }
    
    static tomorrow(timezone: number) {
        const today = Util.today(timezone);
        today.setDate(today.getDate() + 1);
        return today;
    }
    
    static embedURL(title: any, url: string, display: any) {
        return `[${title}](${url.replace(/\)/g, "%27")}${display ? ` "${display}"` : ''})`;
    }
    
    static async verify(channel, user, { time = 30000, extraYes = [], extraNo = [] } = {}) {
		const filter = res => {
			const value = res.content.toLowerCase();
			return (user ? res.author.id === user.id : true)
				&& (yes.includes(value) || no.includes(value) || extraYes.includes(value) || extraNo.includes(value));
		};
		const verify = await channel.awaitMessages(filter, {
			max: 1,
			time
		});
		if (!verify.size) return 0;
		const choice = verify.first().content.toLowerCase();
		if (yes.includes(choice) || extraYes.includes(choice)) return true;
		if (no.includes(choice) || extraNo.includes(choice)) return false;
		return false;
	}

	static cleanAnilistHTML(html) {
		let clean = html
			.replace(/\r|\n|\f/g, '')
			.replace(/<br>/g, '\n')
			.replace(/&#039;/g, '\'')
			.replace(/&quot;/g, '"')
			.replace(/<\/?i>/g, '*')
			.replace(/<\/?b>/g, '**')
			.replace(/~!|!~/g, '||')
			.replace(/&mdash;/g, '—');
		if (clean.length > 2000) clean = `${clean.substr(0, 1995)}...`;
		const spoilers = (clean.match(/\|\|/g) || []).length;
		if (spoilers !== 0 && (spoilers && (spoilers % 2))) clean += '||';
		return clean;
	}
}