name: Validate Registries

on:
  pull_request:
    paths:
      - "apps/v4/public/r/registries.json"
      - "apps/v4/registry/directory.json"
  push:
    branches:
      - main
    paths:
      - "apps/v4/public/r/registries.json"
      - "apps/v4/registry/directory.json"

jobs:
  check-registry-sync:
    if: github.event_name == 'pull_request'
    runs-on: ubuntu-latest
    name: check-registry-sync
    permissions:
      contents: read
      pull-requests: write
    steps:
      - name: Check changed files
        id: changed
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          CHANGED_FILES=$(gh pr diff ${{ github.event.pull_request.number }} --repo ${{ github.repository }} --name-only)

          DIRECTORY_CHANGED=false
          REGISTRIES_CHANGED=false

          if echo "$CHANGED_FILES" | grep -q "^apps/v4/registry/directory.json$"; then
            DIRECTORY_CHANGED=true
          fi

          if echo "$CHANGED_FILES" | grep -q "^apps/v4/public/r/registries.json$"; then
            REGISTRIES_CHANGED=true
          fi

          echo "directory_changed=$DIRECTORY_CHANGED" >> $GITHUB_OUTPUT
          echo "registries_changed=$REGISTRIES_CHANGED" >> $GITHUB_OUTPUT

      - name: Flag missing registries.json update
        if: steps.changed.outputs.directory_changed == 'true' && steps.changed.outputs.registries_changed == 'false'
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          gh pr edit ${{ github.event.pull_request.number }} --repo ${{ github.repository }} --add-label "registries: invalid"
          gh pr comment ${{ github.event.pull_request.number }} --repo ${{ github.repository }} --body "can you run \`pnpm registry:build\` and commit the json files please?"
          exit 1

  validate:
    runs-on: ubuntu-latest
    name: pnpm validate:registries
    permissions:
      contents: read
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Install Node.js
        uses: actions/setup-node@v3
        with:
          node-version: 20

      - name: Block reserved registry namespaces
        env:
          RESERVED_NAMESPACES: "@shadcn,@ui,@blocks,@components,@block,@component,@util,@utils,@registry,@lib,@hook,@hooks,@theme,@themes,@chart,@charts"
        run: |
          node <<'EOF'
          const fs = require("node:fs")

          const files = [
            "apps/v4/public/r/registries.json",
            "apps/v4/registry/directory.json",
          ]
          const reservedNamespaces = new Set(
            process.env.RESERVED_NAMESPACES.split(",").filter(Boolean)
          )

          function readNames(filePath) {
            return JSON.parse(fs.readFileSync(filePath, "utf8")).map(
              (entry) => entry.name
            )
          }

          const violations = files.flatMap((filePath) => {
            return readNames(filePath)
              .filter((name) => reservedNamespaces.has(name))
              .map((name) => `${filePath}: ${name}`)
          })

          if (violations.length > 0) {
            console.error("Reserved registry namespaces are not allowed:")

            for (const violation of violations) {
              console.error(`- ${violation}`)
            }

            process.exit(1)
          }
          EOF

      - uses: pnpm/action-setup@v4
        name: Install pnpm
        id: pnpm-install
        with:
          version: 9.0.6
          run_install: false

      - name: Get pnpm store directory
        id: pnpm-cache
        run: |
          echo "pnpm_cache_dir=$(pnpm store path)" >> $GITHUB_OUTPUT
      - uses: actions/cache@v3
        name: Setup pnpm cache
        with:
          path: ${{ steps.pnpm-cache.outputs.pnpm_cache_dir }}
          key: ${{ runner.os }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
          restore-keys: |
            ${{ runner.os }}-pnpm-store-
      - name: Install dependencies
        run: pnpm install

      - name: Validate registries
        run: pnpm --filter=v4 validate:registries