name: Changesets

on:
  push:
    branches:
      - main

permissions:
  contents: write
  pull-requests: write

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: false

env:
  CI: true

jobs:
  version:
    name: Create Version PR
    runs-on: blacksmith-4vcpu-ubuntu-2404
    steps:
      - name: Checkout code repository
        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
        with:
          fetch-depth: 0

      - name: Install pnpm
        uses: pnpm/action-setup@0ebf47130e4866e96fce0953f49152a61190b271 # v6.0.9

      - name: Setup node.js
        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
        with:
          node-version: 24
          cache: "pnpm"

      - name: Install dependencies
        run: pnpm install --frozen-lockfile

      - name: Create version PR
        id: changesets
        uses: changesets/action@a45c4d594aa4e2c509dc14a9f2b3b67ba3780d0d # v1.9.0
        with:
          commit: "chore: update versions"
          title: "chore: update versions"
          version: pnpm ci:version
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Detect release packages
        id: release_plan
        if: steps.changesets.outputs.hasChangesets == 'false'
        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
        with:
          script: |
            const { execFileSync } = require("node:child_process");
            const { existsSync, readFileSync } = require("node:fs");

            const before = context.payload.before;
            const after = context.sha;
            const isZeroBefore = typeof before === "string" && /^0+$/.test(before);

            if (isZeroBefore) {
              core.warning(
                "Skipping release dispatch on zero before SHA (no baseline to diff)",
              );
              core.setOutput("hasReleasePackages", "false");
              return;
            }

            const runGit = (args) =>
              execFileSync("git", args, { encoding: "utf8" }).trim();

            try {
              runGit(["cat-file", "-e", `${before}^{commit}`]);
            } catch {
              core.warning(
                `Skipping release dispatch because before SHA is missing: ${before}`,
              );
              core.setOutput("hasReleasePackages", "false");
              return;
            }

            const changedFilesOutput = runGit([
              "diff",
              "--name-only",
              before,
              after,
              "--",
              "packages/*/package.json",
            ]);

            const changedFiles = changedFilesOutput
              .split("\n")
              .map((line) => line.trim())
              .filter(Boolean);

            let hasReleasePackages = false;

            for (const filePath of changedFiles) {
              if (!existsSync(filePath)) continue;

              const current = JSON.parse(readFileSync(filePath, "utf8"));
              if (current.private === true) continue;

              let previousVersion = null;
              try {
                const previousRaw = runGit(["show", `${before}:${filePath}`]);
                previousVersion = JSON.parse(previousRaw).version ?? null;
              } catch {
                previousVersion = null;
              }

              if (previousVersion !== current.version) {
                hasReleasePackages = true;
                core.info(`Release candidate: ${current.name}@${current.version}`);
              }
            }

            if (!hasReleasePackages) {
              core.info("Release candidates: none");
            }

            core.setOutput("hasReleasePackages", hasReleasePackages ? "true" : "false");

      - name: Trigger npm publish
        if: steps.changesets.outputs.hasChangesets == 'false' && steps.release_plan.outputs.hasReleasePackages == 'true'
        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
        with:
          script: |
            await github.rest.repos.createDispatchEvent({
              owner: context.repo.owner,
              repo: context.repo.repo,
              event_type: 'npm-publish',
              client_payload: {
                releaseSha: context.sha,
              },
            });