import dotenv from "dotenv";
dotenv.config({ quiet: true });

import { FLAW_LEVELS, VALID_FLAW_CHECKS } from "../libs/constants/index.js";
import {
  DEFAULT_FLAW_LEVELS,
  FILES,
  FOLDERSEARCH,
  NO_PROGRESSBAR,
  FIX_FLAWS,
  FIX_FLAWS_DRY_RUN,
  FIX_FLAWS_TYPES,
  FIX_FLAWS_VERBOSE,
} from "../libs/env/index.js";

const options = Object.freeze({
  flawLevels: parseFlawLevels(DEFAULT_FLAW_LEVELS),
  files: parseFiles(FILES),
  folderSearch: parseFolderSearch(FOLDERSEARCH),
  // Obviously false if the env var for NO_PROGRESSBAR was set but also,
  // if you're going to display flaws, it's going to use stdout anyway.
  noProgressbar: NO_PROGRESSBAR || FIX_FLAWS_DRY_RUN || FIX_FLAWS_VERBOSE,
  fixFlaws: FIX_FLAWS,
  fixFlawsDryRun: FIX_FLAWS_DRY_RUN,
  fixFlawsTypes: FIX_FLAWS_TYPES,
  fixFlawsVerbose: FIX_FLAWS_VERBOSE,
});

function parseFiles(filesStringList: string): Set<string> {
  // The get-diff-action, which we use in the "PR Builds" CI,
  // will make this a massive string that looks like
  // this: `'content/files/en-us/a/index.html','content/files/en-us/a/index.html'`
  // so we need to turn that into an array:
  // ["content/files/en-us/a/index.html", "content/files/en-us/b/index.html"]`
  // Note, when you use get-diff-action in GitHub Actions, it's a comma
  // but if you use the manually `git diff --name-only ...` on your command
  // line it's a newline.
  return new Set(
    filesStringList
      .split(/[,\n]/)
      .map((item) => {
        // Remove any single or double-quote bookends.
        return item.replace(/^(['"])(.*)\1$/, "$2");
      })
      .filter((s) => s)
  );
}

function parseFolderSearch(searchpattern) {
  if (searchpattern) {
    // TODO: Consider turning it into a regex if there are * or $ or ^ in it
    return searchpattern.toLowerCase();
  }
  return null;
}

// Override based on env vars but only for options that are *not*
// exclusive to building everything.
function parseFlawLevels(flawChecks) {
  const checks = flawChecks
    .split(",")
    .map((x) => x.trim())
    .filter((x) => x)
    .map((x) => x.split(":").map((s) => s.trim()));

  // Check that it doesn't contain more than 1 wildcard,
  // because that'd make no sense.
  const wildcards = checks.filter((tuple) => tuple[0] === "*");
  if (wildcards.length > 1) {
    throw new Error(`Can only be 1 wild card (not: ${wildcards})`);
  }

  // Put any wildcards (e.g. '*:warn') first
  checks.sort((a, b) => {
    if (a[0] === "*" && b[0] !== "*") {
      return -1;
    } else if (a[0] !== "*" && b[0] === "*") {
      return 1;
    }
    return 0;
  });

  const checked = new Map();

  // Unless specified, set 'ignore' on all of them first.
  for (const check of VALID_FLAW_CHECKS) {
    checked.set(check, FLAW_LEVELS.IGNORE);
  }

  const levelValues = Object.values(FLAW_LEVELS);

  for (const tuple of checks) {
    if (tuple.length !== 2) {
      throw new Error(`Not a tuple pair of 2 (${tuple})`);
    }
    const [identifier, level] = tuple;
    if (!levelValues.includes(level)) {
      throw new Error(`Invalid level: '${level}' (only ${levelValues})`);
    }
    if (identifier === "*") {
      for (const check of VALID_FLAW_CHECKS) {
        checked.set(check, level);
      }
    } else if (!VALID_FLAW_CHECKS.has(identifier)) {
      throw new Error(
        `Unrecognized flaw identifier: '${identifier}' (only ${[
          ...VALID_FLAW_CHECKS,
        ]})`
      );
    } else {
      checked.set(identifier, level);
    }
  }

  return checked;
}

export default options;