name: Rails Schema Check

on:
  push:
    branches: [main]
    paths:
      - 'db/migrate/**'
      - 'db/schema.rb'
  pull_request:
    branches: [main]
    paths:
      - 'db/migrate/**'
      - 'db/schema.rb'

jobs:
  check-migration-and-schema:
    runs-on: ubuntu-latest

    steps:
    - name: Checkout code
      uses: actions/checkout@v3
      with:
        fetch-depth: 2  # Fetch the last 2 commits to be able to compare with the base branch

    - name: Check for migration and schema.rb changes
      run: |
        #!/bin/bash
        set -e

        latest_migration_file=$(ls -v db/migrate/*.rb | tail -n 1)
        latest_migration_version=$(basename $latest_migration_file | grep -oE '^[0-9]+')

        # Get the schema version, without underscores
        schema_version=$(grep -oE 'define.version: [0-9_]+' db/schema.rb | cut -d ' ' -f 2 | tr -d _)

        if [ "$latest_migration_version" != "$schema_version" ]; then
          echo "schema.rb version does not match the latest migration version. Have you forgotten to update the schema.rb?"
          echo "            SCHEMA VERSION = $schema_version (config/schema.rb)"
          echo "  LATEST MIGRATION VERSION = $latest_migration_version ($latest_migration_file)"
          exit 1
        fi