name: PR Preview Package

on:
  pull_request:
    types: [opened, synchronize, reopened, ready_for_review]
    branches: [main]

permissions:
  contents: read

jobs:
  publish:
    if: github.event.pull_request.draft == false
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4

      - uses: actions/setup-go@40f1582b2485089dde7abd97c1529aa768e1baff # v5
        with:
          go-version-file: go.mod

      - uses: actions/setup-node@60edb5dd545a775178f52524783378180af0d1f8 # v4
        with:
          node-version: lts/*

      - name: Build preview package
        run: ./scripts/build-pkg-pr-new.sh

      - name: Publish to pkg.pr.new
        run: npx pkg-pr-new publish --no-compact --json output.json --comment=off ./.pkg-pr-new

      - name: Build comment payload
        env:
          PR_NUMBER: ${{ github.event.pull_request.number }}
          SOURCE_REPO: ${{ github.event.pull_request.head.repo.full_name }}
          SOURCE_BRANCH: ${{ github.event.pull_request.head.ref }}
        run: |
          node <<'NODE'
          const fs = require("fs");

          const output = JSON.parse(fs.readFileSync("output.json", "utf8"));
          const url = output?.packages?.[0]?.url;
          if (!url) throw new Error("No package URL found in output.json");
          if (!url.startsWith("https://pkg.pr.new/")) {
            throw new Error(`Unexpected package URL: ${url}`);
          }

          const pr = Number(process.env.PR_NUMBER);
          if (!Number.isInteger(pr) || pr <= 0) {
            throw new Error(`Invalid PR_NUMBER: ${process.env.PR_NUMBER}`);
          }

          const payload = {
            pr,
            url,
            sourceRepo: process.env.SOURCE_REPO || "",
            sourceBranch: process.env.SOURCE_BRANCH || "",
          };

          fs.writeFileSync(
            "pkg-pr-new-comment-payload.json",
            JSON.stringify(payload),
          );
          NODE

      - name: Upload comment payload
        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
        with:
          name: pkg-pr-new-comment-payload
          path: pkg-pr-new-comment-payload.json