import ChartSeriesElem from "../interfaces/common/ChartSeriesElem";
import Block from "../interfaces/state/Block";
import { chartDataFieldMap, chartRequestNames } from "./constants";
import Fetch from "./methods";

class Utils {
    static shortenAddress(address: string): string {        
        if (address.length < 10) return address;
        return address.slice(0, 6) + "..." + address.slice(-4);
    }
    static formatTimestampUTC(timestamp: number) {
        const date = new Date(timestamp * 1e3);
        const year = date.getUTCFullYear();
        const month = String(date.getUTCMonth() + 1).padStart(2, '0');
        const day = String(date.getUTCDate()).padStart(2, '0');
        const hours = String(date.getUTCHours()).padStart(2, '0');
        const minutes = String(date.getUTCMinutes()).padStart(2, '0');
        const seconds = String(date.getUTCSeconds()).padStart(2, '0');
        return `${year}-${month}-${day} ${hours}:${minutes}:${seconds}`;
    }

    static formatNumber(number: number | string | undefined, decimalPlaces: number = 2): string {
        if (number === undefined) return "";
        const parsedNumber = typeof number === "number" ? number : parseFloat(number) || 0;
        const roundedNumber = parsedNumber.toFixed(decimalPlaces);
        const [integerPart, decimalPart] = roundedNumber.split(".");
        const formattedIntegerPart = integerPart.replace(/\B(?=(\d{3})+(?!\d))/g, " ");
        const formattedNumber = formattedIntegerPart + (decimalPlaces > 0 ? "." + decimalPart : "");
        return formattedNumber;
    }

    static toShiftedNumber(number: number | string | undefined, shift: number = 2, decimalPlaces: number = 2) {
        if (typeof number !== "string" && typeof number !== "number") return "";
        const string = typeof number === "string" ? number : number.toString();
        const input = string.replace(/\D/g, "");
        const length = input.length;

        if (shift > length) {
            return "0." + ("0".repeat(shift - length) + input).slice(0, 2);
        }

        const delimitedCharIndex = Math.max(0, length - shift);
        const integerPart = input.slice(0, delimitedCharIndex) || '0';
        const decimalPart = decimalPlaces ? input.slice(delimitedCharIndex, length) + "0".repeat(decimalPlaces) : "";

        return integerPart.replace(/\B(?=(\d{3})+(?!\d))/g, " ") + (decimalPart ? "." + decimalPart.slice(0, decimalPlaces) : "");
    }

    static convertENotationToString(num: number | string): string {
        const str = num.toString()
        const match = str.match(/^(\d+)(\.(\d+))?[eE]([-\+]?\d+)$/)
        if (!match) return str;
        const [, integer,, tail, exponentStr ] = match
        const exponent = Number(exponentStr)
        const realInteger = integer + (tail || '')
        if(exponent > 0) {
            const realExponent = Math.abs(exponent + integer.length)
            return realInteger.padEnd(realExponent, '0')
        } else {
            const realExponent = Math.abs(exponent - (tail?.length || 0))
            return '0.'+ realInteger.padStart(realExponent, '0')
        }
    }

    static transformToBlocks(result: any, reverse: boolean = false, hashField: boolean = false): Block[] {
        if (result.sucess === false) return [];
        if (!(result instanceof Array)) return [];
        return (reverse ? result.reverse() : result).map((e: any) => ({
            height: e.height,
            type: e.type === 0 ? "PoS" : "PoW",
            timestamp: parseInt(e.timestamp, 10),
            size: e.total_txs_size,
            transactions: e.tr_count,
            hash: !hashField ? e.id : e.hash
        } as Block));
    }

    static timeElapsedString(timestamp: number): string {
        const currentTimestamp: number = Date.now() / 1000;
        const elapsedSeconds: number = currentTimestamp - timestamp;

        if (elapsedSeconds < 60) {
            return "just now";
        } else if (elapsedSeconds < 3600) {
            const minutes: number = Math.floor(elapsedSeconds / 60);
            return `${minutes} minute${minutes > 1 ? 's' : ''} ago`;
        } else if (elapsedSeconds < 86400) {
            const hours: number = Math.floor(elapsedSeconds / 3600);
            return `${hours} hour${hours > 1 ? 's' : ''} ago`;
        } else if (elapsedSeconds < 31536000) {
            const days: number = Math.floor(elapsedSeconds / 86400);
            return `${days} day${days > 1 ? 's' : ''} ago`;
        } else {
            const years: number = Math.floor(elapsedSeconds / 31536000);
            return `${years} year${years > 1 ? 's' : ''} ago`;
        }
    }

    static async fetchChartInfo(chartId: string): Promise<ChartSeriesElem[][] | undefined> {
        if (!(chartId && chartRequestNames[chartId])) return;
        const result = await Fetch.getChartData(chartId);
        if (!result) return;
        if (result.success === false) return;

        if (chartId === "difficulty-pow" || chartId === "difficulty-pos") {
            const dataDetailed = result.detailed;

            if (!dataDetailed || typeof dataDetailed !== "object") return;

            return [ 
                dataDetailed.map(
                    (e: any) => ({
                        x: parseFloat(e?.at || 0) * 1e3,
                        y: parseInt(e?.d, 10) || 0,
                        label: "test"
                    })
                ) 
            ];
        } else {
            if (!(result instanceof Array)) return;

            if (chartId === "hash-rate") {
                return [ 
                    result.map(
                        (e: any) => ({
                            x: parseFloat(e?.at || 0) * 1e3,
                            y: parseFloat(e?.h100) || 0,
                            label: "test"
                        })
                    ),
                    result.map(
                        (e: any) => ({
                            x: parseFloat(e?.at || 0) * 1e3,
                            y: parseFloat(e?.h400) || 0,
                            label: "test"
                        })
                    ),
                    result.map(
                        (e: any) => ({
                            x: parseFloat(e?.at || 0) * 1e3,
                            y: parseFloat(e?.d120) || 0,
                            label: "test"
                        })
                    ) 
                ];
            } else {
                return [
                    result.map(
                        (e: any) => ({
                            x: parseFloat(e?.at || 0) * 1e3,
                            y: e?.[chartDataFieldMap[chartId]] || 0,
                            label: "test"
                        })
                    )
                ];
            }
        }
    }
}

export default Utils;