import fs from "fs";
import xml from "xml";
import crypto from "crypto";

class Shooting {
  date;
  location;
  state;
  victims_dead;
  victims_injured;
  victims_total;
  description;
  source_urls;

  /**
   * @param {string} input
   */
  constructor(input) {
    const lines = input.trim().split("\n");

    this.date = lines[0].replace(/(^\|+)|(\{\{[\w\s]*\|)|(\}\})|((-|–)[0-9]+)/g, "");
    this.location = lines[1].replace(/(^\|+)|(\[\[(.*\|)?)|(\]\].*)/g, "");
    this.state = lines[2].replace(/(^\|+)|(\[\[(.*\|)?)|(\]\])/g, "");
    this.victims_dead = Number(lines[3].replace(/^\|+/, "")) || 0;
    this.victims_injured = Number(lines[4].replace(/^\|+/, "")) || 0;
    this.victims_total = Number(lines[5].replace(/(^\|+)|(''')/g, "")) || 0;

    this.description = lines[6]
      .replace(/^\|+/, "")
      .replace(/(\[\[(.*\|)?)|(\]\])/g, "")
      .replace(/\<ref\>.*\<\/ref\>/g, "")
      .replace(/\{\{.*\}\}/g, "")
      .replace(/\}\}.*/g, "")
      .trim();

    this.source_urls = /\|url=^[\s|]*/g
      .exec(lines[6])
      ?.map((match) => match.replace("|url=", ""));
  }
}

const input = fs.readFileSync("/tmp/feed_input.txt").toString("utf8");
const text = input
  .substring(
    input.indexOf("== List =="),
    input.indexOf("== Monthly statistics ==") - 1
  )
  .trim();
const segments = text
  .split(/\n\|-.*\n/)
  .slice(2)
  .filter((segment) => segment.length);

const shootings = [];

for (const segment of segments) {
  const shooting = new Shooting(segment);
  shootings.push(shooting);
}

// fs.writeFileSync("./shootings.json", JSON.stringify(shootings, null, 4));

const feed = {
  rss: [
    {
      _attr: {
        version: "2.0",
        "xmlns:atom": "http://www.w3.org/2005/Atom",
      },
    },
    {
      channel: [
        {
          "atom:link": {
            _attr: {
              href: "https://futacockinside.me/files/mass_shootings.rss",
              rel: "self",
              type: "application/rss+xml",
            },
          },
        },
        {
          title: "Mass shootings in America (2023)",
        },
        {
          link: "https://en.m.wikipedia.org/w/index.php?title=List_of_mass_shootings_in_the_United_States_in_2023",
        },
        {
          description:
            "Feed of mass shootings in America, updated automatically from Wikipedia",
        },
        { language: "en-US" },
        ...shootings.map((shooting) => {
          const guid = crypto
            .createHash("sha256")
            .update(
              `${shooting.date} ${shooting.location} ${shooting.state} ${shooting.victims_dead}/${shooting.victims_injured}/${shooting.victims_total}`
            )
            .digest("hex");

          return {
            item: [
              {
                title: `${shooting.date} - ${shooting.location}, ${shooting.state}`,
              },
              { pubDate: new Date(`${shooting.date} 2023`).toUTCString() },
              { guid: guid },
              { link: "https://en.m.wikipedia.org/w/index.php?title=List_of_mass_shootings_in_the_United_States_in_2023" },
              {
                description: `${shooting.victims_dead} dead, ${
                    shooting.victims_injured
                  } injured.\n\n${shooting.description}\n${
                    shooting.source_urls?.join(" ") || ""
                  }`.trim(),
                },
              
            ],
          };
        }),
      ],
    },
  ],
};

fs.writeFileSync(
  "/tmp/feed_output.rss",
  xml(feed, { indent: "    " })
);