#!/usr/bin/env node
/* eslint-disable @typescript-eslint/no-unused-vars */

import { join as pathJoin, relative as pathRelative, sep as pathSep } from "path";
import * as fs from "fs";
import { getProjectRoot } from "./tools/getProjectRoot";
import { assert } from "tsafe/assert";
import type { Equals } from "tsafe";

(async () => {
    const projectDirPath = process.cwd();

    const viteConfigFilePath = (() => {
        for (const ext of [".js", ".ts"]) {
            const candidateFilePath = pathJoin(projectDirPath, `vite.config${ext}`);

            if (!fs.existsSync(candidateFilePath)) {
                continue;
            }

            return candidateFilePath;
        }

        return undefined;
    })();

    const publicDirPath =
        viteConfigFilePath !== undefined
            ? await (async function getVitePublicDirPath() {
                  const viteConfig = fs.readFileSync(viteConfigFilePath).toString("utf8");

                  if (!viteConfig.includes("publicDir")) {
                      return pathJoin(projectDirPath, "public");
                  }

                  const [, afterPublicDir] = viteConfig.split(/\s["']?publicDir["']?\s*:/);

                  for (let indexEnd = 0; indexEnd < afterPublicDir.length; indexEnd++) {
                      const {
                          default: path,
                          basename,
                          dirname,
                          delimiter,
                          extname,
                          format,
                          isAbsolute,
                          join,
                          normalize,
                          parse,
                          posix,
                          relative,
                          resolve,
                          sep,
                          toNamespacedPath,
                          win32,
                          ...rest
                      } = await import("path");
                      assert<Equals<keyof typeof rest, never>>();

                      const part = afterPublicDir
                          .substring(0, indexEnd)
                          .replace(/__dirname/g, `"${projectDirPath}"`);

                      let candidate: string;

                      try {
                          candidate = eval(part);
                      } catch {
                          continue;
                      }

                      if (typeof candidate !== "string") {
                          continue;
                      }

                      return candidate;
                  }

                  console.error(
                      `Can't parse the vite configuration please open an issue about it ${getRepoIssueUrl()}`
                  );

                  process.exit(-1);
              })()
            : pathJoin(projectDirPath, "public");

    edit_gitignore: {
        const gitignoreFilePath = pathJoin(projectDirPath, ".gitignore");

        if (!fs.existsSync(gitignoreFilePath)) {
            fs.writeFileSync(gitignoreFilePath, Buffer.from("", "utf8"));
        }

        const gitignoreRaw = fs.readFileSync(gitignoreFilePath).toString("utf8");

        const pathToIgnore = `/${pathJoin(
            pathRelative(projectDirPath, publicDirPath),
            "dsfr"
        ).replace(new RegExp(`\\${pathSep}`, "g"), "/")}/`;

        if (gitignoreRaw.split("\n").find(line => line.startsWith(pathToIgnore)) !== undefined) {
            break edit_gitignore;
        }

        fs.writeFileSync(
            gitignoreFilePath,
            Buffer.from(`${gitignoreRaw}\n${pathToIgnore}\n`, "utf8")
        );
    }

    if (!fs.existsSync(publicDirPath)) {
        if (viteConfigFilePath === undefined) {
            console.error(
                [
                    "There is no public/ directory in the current working directory, we don't know your framework",
                    "you are not calling this script at the right location or we don't know your React framework",
                    `please submit an issue about it here ${getRepoIssueUrl()}`
                ].join(" ")
            );

            process.exit(-1);
        }

        fs.mkdirSync(publicDirPath, { "recursive": true });
    }

    const dsfrDirPath = pathJoin(publicDirPath, "dsfr");

    if (fs.existsSync(dsfrDirPath)) {
        fs.rmSync(dsfrDirPath, { "recursive": true, "force": true });
    }

    fs.cpSync(
        pathJoin(projectDirPath, "node_modules", "@codegouvfr", "react-dsfr", "dsfr"),
        dsfrDirPath,
        {
            "recursive": true
        }
    );
})();

function getRepoIssueUrl() {
    const reactDsfrRepoUrl = JSON.parse(
        fs.readFileSync(pathJoin(getProjectRoot(), "package.json")).toString("utf8")
    )
        ["repository"]["url"].replace(/^git/, "https:")
        .replace(/\.git$/, "");

    return `${reactDsfrRepoUrl}/issues`;
}