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

// This script should be ran before `bump-zed-minor-versions`

// Prints the changelogs for all preview releases associated with the most
// recent preview minor version.

// Future TODO: Have the script perform deduplication of lines that were
// included in both past stable and preview patches that shouldn't be mentioned
// again in this week's stable minor release.

// Future TODO: Get changelogs for latest cherry-picked commits on preview and
// stable that didn't make it into a release, as they were cherry picked

const { execFileSync } = require("child_process");
let { GITHUB_ACCESS_TOKEN } = process.env;
const GITHUB_TAGS_API_URL = "https://api.github.com/repos/zed-industries/zed/releases/tags";
const DIVIDER = "-".repeat(80);

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);
    }
  }

  const allTags = execFileSync("git", ["tag", "--sort", "-committerdate"], { encoding: "utf8" })
    .split("\n")
    .filter((t) => t.length > 0);
  const latestPreviewTag = allTags.filter((t) => t.startsWith("v") && t.endsWith("-pre"))[0];
  const latestPreviewMinorVersion = latestPreviewTag.split(".")[1];
  const latestPreviewTagRegex = new RegExp(`^v(\\d+)\\.(${latestPreviewMinorVersion})\\.(\\d+)-pre$`);

  const parsedPreviewTags = allTags
    .map((tag) => {
      const match = tag.match(latestPreviewTagRegex);
      if (match) {
        return {
          tag,
          version: {
            major: parseInt(match[1]),
            minor: parseInt(match[2]),
            patch: parseInt(match[3]),
          },
        };
      }
      return null;
    })
    .filter((item) => item !== null)
    .sort((a, b) => a.version.patch - b.version.patch);

  const matchingPreviewTags = parsedPreviewTags.map((item) => item.tag);

  console.log("Fetching release information for preview tags:");
  console.log(DIVIDER);

  for (const tag of matchingPreviewTags) {
    const releaseApiUrl = `${GITHUB_TAGS_API_URL}/${tag}`;

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

      if (!response.ok) {
        console.log(`Failed to fetch release for ${tag}: ${response.status}`);
        continue;
      }

      const release = await response.json();

      console.log(`\nRelease: ${release.name || tag}`);
      console.log(`Tag: ${tag}`);
      console.log(`Published: ${release.published_at}`);
      console.log(`URL: ${release.html_url}`);
      console.log("\nRelease Notes:");
      console.log(release.body || "No release notes");
      console.log(DIVIDER);
    } catch (error) {
      console.log(`Error fetching release for ${tag}:`, error.message);
    }
  }

  const patchUpdateTags = parsedPreviewTags.filter((tag) => tag.version.patch != 0).map((tag) => tag.tag);

  console.log();
  console.log("Please review the release notes associated with the following patch versions:");
  for (const tag of patchUpdateTags) {
    console.log(`- ${tag}`);
  }
  console.log("Remove items that have already been mentioned in the current published stable versions.");
  console.log("https://github.com/zed-industries/zed/releases?q=prerelease%3Afalse&expanded=true");
}