#!/usr/bin/env node --redirect-warnings=/dev/null

const { execFileSync } = require("child_process");
let { GITHUB_ACCESS_TOKEN } = process.env;
const PR_REGEX = /#\d+/; // Ex: matches on #4241
const FIXES_REGEX = /(fixes|closes|completes) (.+[/#]\d+.*)$/im;

main();

async function main() {
  if (!GITHUB_ACCESS_TOKEN) {
    try {
      GITHUB_ACCESS_TOKEN = execFileSync("gh", ["auth", "token"]).toString();
    } catch (error) {
      console.log(error);
      console.log("No GITHUB_ACCESS_TOKEN, and no `gh auth token`");
      process.exit(1);
    }
  }

  // Use form of: YYYY-MM-DD - 2023-01-09
  const startDate = new Date(process.argv[2]);
  const today = new Date();

  console.log(`Changes from ${startDate} to ${today}\n`);

  let pullRequestNumbers = getPullRequestNumbers(startDate, today);

  // Fetch the pull requests from the GitHub API.
  console.log("Merged Pull requests:");
  for (const pullRequestNumber of pullRequestNumbers) {
    const webURL = `https://github.com/zed-industries/zed/pull/${pullRequestNumber}`;
    const apiURL = `https://api.github.com/repos/zed-industries/zed/pulls/${pullRequestNumber}`;

    const response = await fetch(apiURL, {
      headers: {
        Authorization: `token ${GITHUB_ACCESS_TOKEN}`,
      },
    });

    const pullRequest = await response.json();
    console.log("*", pullRequest.title);
    console.log("  PR URL:    ", webURL);
    console.log("  Merged:    ", pullRequest.merged_at);
    console.log();
  }
}

function getPullRequestNumbers(startDate, endDate) {
  const sinceDate = startDate.toISOString();
  const untilDate = endDate.toISOString();

  const pullRequestNumbers = execFileSync(
    "git",
    ["log", `--since=${sinceDate}`, `--until=${untilDate}`, "--oneline"],
    { encoding: "utf8" },
  )
    .split("\n")
    .filter((line) => line.length > 0)
    .map((line) => {
      const match = line.match(/#(\d+)/);
      return match ? match[1] : null;
    })
    .filter((line) => line);

  return pullRequestNumbers;
}