name: Code Formatting
on:
  workflow_call:
    inputs:
      auto_fix:
        description: "Automatically fix formatting issues instead of just checking"
        required: false
        type: boolean
        default: false
    outputs:
      commit_sha:
        description: "The SHA of the commit with formatting fixes"
        value: ${{ jobs.formatting.outputs.commit_sha }}
  push:
    branches-ignore:
      - "queue-main-*"
      - "queue-dev-*"
  pull_request:

permissions:
  contents: write

jobs:
  formatting:
    outputs:
      commit_sha: ${{ steps.get_commit.outputs.commit_sha }}
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          ref: ${{ (inputs.auto_fix == true && (github.head_ref || github.ref)) || (github.event_name == 'pull_request' && github.event.pull_request.head.sha) || github.ref }}
          # Need full history for queue-main pushes
          fetch-depth: 0

      # Setup for Prettier
      # We don't need to do "npm ci" because run-formatters.sh uses "npx prettier"
      # and this is speedier than installing everything.
      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: "20"
          cache: "npm"
          cache-dependency-path: webui/package-lock.json

      - name: Install gofumpt v0.8.0
        run: |
          curl -L https://github.com/mvdan/gofumpt/releases/download/v0.8.0/gofumpt_v0.8.0_linux_amd64 -o /tmp/gofumpt
          chmod +x /tmp/gofumpt
          sudo mv /tmp/gofumpt /usr/local/bin/gofumpt

      - name: Check formatting
        if: inputs.auto_fix != true
        run: bin/run-formatters.sh check

      - name: Fix formatting
        if: inputs.auto_fix == true
        run: bin/run-formatters.sh fix

      # Commit formatting fixes if auto_fix is true
      - name: Commit and push formatting fixes if needed
        if: inputs.auto_fix == true
        run: |
          # Only proceed if there are changes to commit
          if [[ -z $(git status --porcelain) ]]; then
            echo "No formatting changes detected, skipping commit"
            exit 0
          fi

          git config --global user.name "Autoformatter"
          git config --global user.email "bot@sketch.dev"
          git add .

          git fetch origin main
          MERGE_BASE=$(git merge-base HEAD origin/main)
          COMMIT_COUNT=$(git rev-list --count $MERGE_BASE..HEAD)

          if [ "$COMMIT_COUNT" -eq 1 ]; then
            echo "Found exactly one commit since merge-base with origin/main. Amending the commit."
            git commit --amend --no-edit
          else
            echo "Found multiple commits ($COMMIT_COUNT) since merge-base with origin/main. Creating a new commit."
            git commit -m "all: fix formatting"
          fi

          git push -f https://${GITHUB_ACTOR}:${GITHUB_TOKEN}@github.com/${GITHUB_REPOSITORY}.git HEAD

      - name: Get commit SHA
        id: get_commit
        run: echo "commit_sha=$(git rev-parse HEAD)" >> $GITHUB_OUTPUT