import { Injectable } from '@nestjs/common';
import {
  Auction,
  AuctionsResponse,
  Domain,
  DomainSet,
  DomainsResponse,
  ParkioTld,
  ParsedAuction,
  ParsedDomain,
} from './types';
import axios from 'axios';
import { filter, map, pipe } from 'ramda';

const parkIoEndpoints = {
  domains: 'https://park.io/domains.json',
  auctions: 'https://park.io/auctions.json',
  tld: (tld: ParkioTld) => `https://park.io/domains/index/${tld}.json`,
  all: (limit: number = 10_000) =>
    `https://park.io/domains/index/all.json?limit=${limit}`,
};

@Injectable()
export class ParkioService {
  fetchDomainsForTld = async (tld: ParkioTld) => {};

  fetchAllDomains = async (limit: number = 10_000): Promise<ParsedDomain[]> => {
    let response = await axios.get<DomainsResponse>(parkIoEndpoints.all(limit));

    // There may have been more than our set limit
    if (response.data.current === limit) {
      return await this.fetchAllDomains(limit + 200);
    }

    return map(this.parseDomain, response.data.domains);
  };

  fetchAuctions = async (): Promise<ParsedAuction[]> => {
    const response = await axios.get<AuctionsResponse>(
      parkIoEndpoints.auctions,
    );

    return map(this.parseAuction, response.data.auctions);
  };

  lengthFilter = (length: number) => (parsedDomain: ParsedDomain) =>
    parsedDomain.domain.length === length;

  buildExtensions = (domains: ParsedDomain[], extensions: ParkioTld[]) =>
    pipe(
      map((extension: ParkioTld) =>
        pipe(
          filter(this.tldFilter(extension)),
          filter(this.maxLengthFilter(3)),
        )(domains),
      ),
    )(extensions);

  extractDomain = (domain: string): string =>
    domain.split('.').slice(0, -1).join('.');

  extractTld = (domain: string): string =>
    domain.split('.').slice(-1).join('.');

  parseDomain = (domain: Domain): ParsedDomain => {
    const domainName = this.extractDomain(domain.name);
    return {
      ...domain,
      id: Number(domain.id),
      domain: domainName,
      domain_length: domainName.length,
      date_available: domain.date_available
        ? this.parseDate(domain.date_available)
        : undefined,
      date_registered: domain.date_registered
        ? this.parseDate(domain.date_registered)
        : undefined,
    };
  };

  parseDate = (date: string) =>
    new Date(
      Date.parse(
        date.replace(
          /(\d+)-(\d+)-(\d+)UTC(\d+:\d+:\d{0,2})\d*/,
          '$1-$3-$2T$4Z',
        ),
      ),
    );

  parseAuction = (auction: Auction): ParsedAuction => {
    const domain = this.extractDomain(auction.name);
    const tld = this.extractTld(auction.name);
    return {
      ...auction,
      id: Number(auction.id),
      num_bids: Number(auction.num_bids),
      price: Number(auction.price),
      close_date: this.parseDate(auction.close_date),
      created: this.parseDate(auction.created),
      domain,
      domain_length: domain.length,
      tld,
    };
  };

  domainToString = (domain: ParsedDomain) =>
    `${domain.name}\t${domain.date_available}`;

  auctionToString = (auction: ParsedAuction) =>
    `${auction.name}\t$${auction.price}\t${auction.close_date}`;

  tldFilter = (tld: ParkioTld) => (domain: ParsedDomain) => domain.tld === tld;

  maxLengthFilter = (length: number) => (parsedDomain: ParsedDomain) =>
    parsedDomain.domain.length <= length;
}