"use strict";

import * as fs from "fs";
import * as ShieldDef from "../src/js/shield_defs.js";

function fillPaths(svg: string, codes: string[]): string {
  const selectors: Set<string> = new Set(
    codes.map((code) => `.${code.toLowerCase()}`)
  );
  if (selectors.has(".fr")) {
    // French overseas territories use the FR prefix.
    selectors.add(".bl");
    selectors.add(".mf");
    selectors.add(".nc");
    selectors.add(".pf");
    selectors.add(".pm");
    selectors.add(".wf");
  }
  if (selectors.has(".nl")) {
    // Curaçao routes use NL prefix with the Netherlands.
    selectors.add(".cw");
  }
  if (selectors.has(".us")) {
    // Routes in United States insular areas use US prefix with the U.S.
    selectors.add(".ust");
  }
  return svg.replace(".supported", Array.from(selectors).join(",\n"));
}

// Inject a map of each sprite ID to an absolute image URL instead of the usual sprite metadata.
const shields = ShieldDef.loadShields();

let worldSVG: string = fs.readFileSync(
  `${process.cwd()}/scripts/blank_map_world.svg`,
  {
    encoding: "utf8",
  }
);
worldSVG = fillPaths(
  worldSVG,
  Object.keys(shields.networks)
    .map((network) => network.match(/^(\w\w)(?::|$)|^omt-(\w\w)-/))
    .filter((m): m is RegExpMatchArray => m !== null)
    .map((m) => m[1] || m[2])
);
worldSVG = worldSVG.replace(
  /<title>.+?<\/title>/,
  "<title>Countries with shields supported by OpenStreetMap Americana</title>"
);
fs.writeFileSync(`${process.cwd()}/doc-img/shield_map_world.svg`, worldSVG);