name: Prepare for deployment.

on:
  push:
    branches:
      - 'main'

jobs:
  minify:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
        with:
          ref: main
          fetch-depth: '3'
      
      - uses: actions/setup-node@v3
        with:
          node-version: '16'

      - name: Install dependencies.
        run: npm i -g terser csso-cli html-minifier

      - name: Copy over changes.
        run: |
          git branch build
          git checkout build

      - name: Minify files.
        run: |
          for i in `find . -name "*.js" -type f`; do terser $i --compress -o $i; done
          for i in `find . -name "*.css" -type f`; do csso $i -o $i; done
          for i in `find . -name "*.html" -type f`; do html-minifier --remove-comments --collapse-whitespace $i -o $i; done
      
      - name: Create pull request.
        uses: peter-evans/create-pull-request@v4
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          commit-message: Minified HTML, CSS, JS. Prepared for production.
          committer: github-actions  <github-actions@users.noreply.github.com>
          author: github-actions <github-actions@users.noreply.github.com>
          title: Deploy changes from main branch.
          body: Automated with [create-pull-request](https://github.com/peter-evans/create-pull-request) GitHub action.
          assignees: MajorDroolz
          reviewers: MajorDroolz
          branch: temp