name: Decrease studio lint ratchet baselines

on:
  schedule:
    - cron: '0 0 * * SUN'
  workflow_dispatch:

permissions:
  contents: write
  pull-requests: write

jobs:
  decrease-baselines:
    runs-on: blacksmith-4vcpu-ubuntu-2404

    steps:
      - uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
        with:
          sparse-checkout: |
            .github
            apps/studio
            packages
            patches

      - uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4.2.0
        name: Install pnpm
        with:
          run_install: false

      - name: Use Node.js
        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
        with:
          node-version-file: '.nvmrc'
          cache: 'pnpm'

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

      - name: Generate token
        id: app-token
        uses: actions/create-github-app-token@29824e69f54612133e76f7eaac726eef6c875baf # v2.2.1
        with:
          app-id: ${{ secrets.GH_AUTOFIX_APP_ID }}
          private-key: ${{ secrets.GH_AUTOFIX_PRIVATE_KEY }}

      - name: Decrease ESLint ratchet baselines and open PR
        env:
          GH_TOKEN: ${{ steps.app-token.outputs.token }}
          DEFAULT_BRANCH: ${{ github.event.repository.default_branch }}
        run: |
          set -eo pipefail
          DEFAULT_BRANCH=${DEFAULT_BRANCH:-master}

          BRANCH="bot/decrease-eslint-ratchet-baselines"

          git fetch origin "$DEFAULT_BRANCH" --depth=1
          if git ls-remote --exit-code --heads origin "$BRANCH" > /dev/null 2>&1; then
            git fetch origin "$BRANCH":"$BRANCH" --depth=1
            git switch "$BRANCH"
            git reset --hard "origin/$DEFAULT_BRANCH"
          else
            git switch --create "$BRANCH" "origin/$DEFAULT_BRANCH"
          fi

          pnpm --filter studio run lint:ratchet --decrease-baselines

          if git diff --quiet; then
            echo "No baseline updates detected."
            exit 0
          fi

          git config user.name 'github-actions[bot]'
          git config user.email 'github-actions[bot]@users.noreply.github.com'

          git add apps/studio/.github/eslint-rule-baselines.json
          git commit --message "chore: decrease ESLint ratchet baselines"
          git push --force origin "$BRANCH"

          pr_url=$(gh pr list --state open --head "$BRANCH" --json url --jq '.[0].url // ""' 2>/dev/null || echo "")
          if [ -z "$pr_url" ]; then
            gh pr create \
              --title "[bot] Decrease ESLint ratchet baselines" \
              --body "Automated weekly decrease of ESLint ratchet baselines." \
              --base "$DEFAULT_BRANCH" \
              --head "$BRANCH"
          else
            gh pr comment "$pr_url" --body "Updated ESLint ratchet baselines with the latest weekly decreases."
          fi