import * as wmill from "windmill-client";

import { basename } from "node:path"

const util = require('util');

const exec = util.promisify(require('child_process').exec);

export async function main(repo_url_resource_path: string) {

  const cwd = process.cwd();

  process.env["HOME"] = ".";

  console.log(`Cloning repo from resource`);

  const repo_name = await git_clone(repo_url_resource_path);

  process.chdir(`${cwd}/${repo_name}`);

  console.log(`Attempting an empty push to repository ${repo_name}`);

  await git_push();

  console.log("Finished");

  process.chdir(`${cwd}`);

}

async function git_clone(repo_resource_path: string): Promise<string> {

  // TODO: handle private SSH keys as well

  let repo_url = (await wmill.getResource(repo_resource_path)).url;

  const azureMatch = repo_url.match(/AZURE_DEVOPS_TOKEN\((?<url>.+)\)/);

  if (azureMatch) {

    console.log(

      "Requires Azure DevOps service account access token, requesting..."

    );

    const azureResource = await wmill.getResource(azureMatch.groups.url);

    const response = await fetch(

      `https://login.microsoftonline.com/${azureResource.azureTenantId}/oauth2/token`,

      {

        method: "POST",

        body: new URLSearchParams({

          client_id: azureResource.azureClientId,

          client_secret: azureResource.azureClientSecret,

          grant_type: "client_credentials",

          resource: "499b84ac-1321-427f-aa17-267ca6975798/.default",

        }),

      }

    );

    const { access_token } = await response.json();

    repo_url = repo_url.replace(azureMatch[0], access_token);

  }

  const repo_name = basename(repo_url, ".git");

  await sh_run(4, "git", "clone", "--quiet", "--depth", "1", repo_url, repo_name);

  return repo_name;

}

async function git_push() {

  await sh_run(undefined, "git", "config", "user.email", process.env["WM_EMAIL"])

  await sh_run(undefined, "git", "config", "user.name", process.env["WM_USERNAME"])

  await sh_run(undefined, "git", "push");

}

async function sh_run(

  secret_position: number | undefined,

  cmd: string,

  ...args: string[]

) {

  const nargs = secret_position != undefined ? args.slice() : args;

  if (secret_position && secret_position < 0) {

    secret_position = nargs.length - 1 + secret_position;

  }

  if (secret_position != undefined) {

    nargs[secret_position] = "***";

  }

  console.log(`Running '${cmd} ${nargs.join(" ")} ...'`);

  const command = exec(`${cmd} ${args.join(" ")}`)

  // new Deno.Command(cmd, {

  //   args: args,

  // });

  const { error, stdout, stderr } = await command

  if (stdout.length > 0) {

    console.log(stdout);

  }

  if (stderr.length > 0) {

    console.log(stderr);

  }

  if (error) {

    const err = `SH command '${cmd} ${nargs.join(

      " "

    )}' returned with error ${error}`;

    throw Error(err);

  }

  console.log("Command successfully executed");

}