import { Controller, Get, Res } from '@nestjs/common';
import { Response } from 'express';
import { identity, prop } from 'ramda';
import * as xml from 'xml';

const episodeFiles: [number, string][] = [
  [27544345, '01-Into-the-Big-Wet.mp3'],
  [30724178, '02-Ocean-Rumours.mp3'],
  [30752181, '03-Step-Two.mp3'],
  [28793207, '04-Red-Ladder-Revelations.mp3'],
  [29684714, '05-What-to-do-with-a-Problem-Like-Daveda.mp3'],
  [29387545, '06-Hair-Bussy.mp3'],
  [30789798, '07-Monkey-Monkey-Cock-a-Roach.mp3'],
  [29449403, '08-SS-Jungle-and-Blood.mp3'],
  [29554728, '09-A-Bad-Day-in-Sogland.mp3'],
  [31728952, '10-A-Loathed-Trip-Down-Memory-Lane.mp3'],
  [29711881, '11-Dog-Egg-Consumption.mp3'],
  [31212772, '12-Meg-and-Bobs-Wedding-Bussy.mp3'],
  [30951548, '13-100-Genuine-Pussy-Hound.mp3'],
  [33766503, '14-One-Perfect-Answer.mp3'],
  [29643754, '15-Succulent-Pig-Excitement.mp3'],
  [29797145, '16-Welcome-to-Jackson-Island.mp3'],
  [37926451, '17-Infinite-Meat.mp3'],
  [33863888, '18-The-Jackson-Triumvirate.mp3'],
  [30256482, '19-A-Lucky-Day-to-be-a-Jackson.mp3'],
  [40947042, '20-The-Joels-Triumphant.mp3'],
];

const startDate = new Date('2023-10-02');

type Episode = {
  filename: string;
  length: number;
  url: string;
  title: string;
  description: string;
  fakeReleaseDate: Date;
};

const episodes: Episode[] = episodeFiles.map((file, i) => {
  const [length, filename] = file;
  return {
    filename,
    length,
    url: `https://s3.apps.hnl.byoi.net/dinosaurpark/DinosaurWet/${filename}`,
    title: filename.replace('.mp3', '').replace(/-/g, ' ').trim(),
    description:
      'A bootleg-ish of Dinosar Wet, making the downloaded files more like and RSS feed',
    fakeReleaseDate: new Date(
      new Date(startDate).setDate(startDate.getDate() + i * 7),
    ),
  };
});

const buildFeeds = (
  episodes: Episode[],
  pubDateFn: (index: number) => Date = () => startDate,
) => {
  const feedObject = {
    rss: [
      {
        _attr: {
          version: '2.0',
          'xmlns:atom': 'http://www.w3.org/2005/Atom',
        },
      },
      {
        channel: [
          {
            'atom:link': {
              _attr: {
                href: 'https://api.us.dev/dinosaurwet',
                rel: 'self',
                type: 'application/rss+xml',
              },
            },
          },
          {
            title: 'Dinosaur Wet - All At Once',
          },
          {
            link: 'https://sanspantsradio.com',
          },
          {
            description:
              'A recreation of Dinosaur Wet as an RSS feed for listeners-with-licenses enjoyment.',
          },
          { language: 'en-US' },
          ...episodes
            .filter(
              (episode: Episode, index: number) =>
                pubDateFn(index) <= new Date(),
            )
            .map(({ title, url, length, fakeReleaseDate }, index) => ({
              item: [
                { title },
                { guid: url },
                { pubDate: pubDateFn(index).toUTCString() },
                {
                  enclosure: [
                    {
                      _attr: {
                        url,
                        type: 'audio/mpeg',
                        length,
                      },
                    },
                  ],
                },
              ],
            })),
        ],
      },
    ],
  };

  const feed = '<?xml version="1.0" encoding="UTF-8"?>' + xml(feedObject);
  return feed;
};

@Controller('dinosaurwet')
export class DinosaurwetController {
  @Get('')
  getAllAtOnce(@Res() response: Response) {
    response.header('Content-Type', 'application/xml');
    const feed = buildFeeds(episodes);
    return response.send(feed);
  }

  @Get('daily')
  getDaily(@Res() response: Response) {
    response.header('Content-Type', 'application/xml');
    const feed = buildFeeds(
      episodes,
      (index: number) =>
        new Date(new Date(startDate).setDate(startDate.getDate() + index)),
    );
    return response.send(feed);
  }

  @Get('weekly')
  getWeekly(@Res() response: Response) {
    response.header('Content-Type', 'application/xml');
    const feed = buildFeeds(
      episodes,
      (index: number) =>
        new Date(new Date(startDate).setDate(startDate.getDate() + index * 7)),
    );
    return response.send(feed);
  }
}