---
name: Check

on:
  pull_request:
    branches: ["master"]

jobs:
  spellcheck:
    runs-on: ubuntu-latest
    steps:
      - uses: gevhaz/word-warden@v1.0.0
        with:
          preprocessing_script: .github/scripts/preprocess-for-spellchecking.sed
          files: "**/!(tempora-maxime|lorem|id-modi|LICENSE).md"

  linkcheck:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Run linkspector
        uses: umbrelladocs/action-linkspector@v1.3.3
        with:
          github_token: ${{ secrets.github_token }}
          reporter: github-pr-review
          filter_mode: nofilter
          fail_on_error: true

  markdownlint:
    runs-on: ubuntu-latest
    steps:
      - name: Check out code
        uses: actions/checkout@v2
      - name: Run mdl
        uses: actionshub/markdownlint@main
        with:
          filesToIgnoreRegex: "(exampleSite/content/|archetypes).*"

  build:
    runs-on: ubuntu-latest
    env:
      HUGO_VERSION: 0.102.3
    steps:
      - name: Install Hugo CLI
        run: |
          wget -O ${{ runner.temp }}/hugo.deb https://github.com/gohugoio/hugo/releases/download/v${HUGO_VERSION}/hugo_extended_${HUGO_VERSION}_Linux-64bit.deb \
          && sudo dpkg -i ${{ runner.temp }}/hugo.deb
      - name: Checkout
        uses: actions/checkout@v3
        with:
          submodules: recursive
      - name: Build with Hugo
        env:
          HUGO_ENVIRONMENT: production
          HUGO_ENV: production
        run: |
          set -x
          hugo \
            --minify \
            --baseURL grotius.example.com \
            --theme hugo-theme-notrack/ \
            --themesDir ../../ \
            --printUnusedTemplates \
        working-directory: ./exampleSite

  visual-diff:
    runs-on: ubuntu-latest
    env:
      HUGO_VERSION: 0.102.3
    steps:
      - name: Install Hugo CLI
        run: |
          wget -O ${{ runner.temp }}/hugo.deb https://github.com/gohugoio/hugo/releases/download/v${HUGO_VERSION}/hugo_extended_${HUGO_VERSION}_Linux-64bit.deb \
          && sudo dpkg -i ${{ runner.temp }}/hugo.deb
      - name: Checkout
        uses: actions/checkout@v3
        with:
          submodules: recursive
          fetch-depth: 0
      - name: Build master branch version
        run: |
          git checkout master
          hugo -d public-master \
            --theme hugo-theme-notrack/ \
            --themesDir ../../
        working-directory: ./exampleSite
      - name: Build pull request version
        run: |
          git checkout ${{ github.head_ref }}
          hugo -d public-pr \
            --theme hugo-theme-notrack/ \
            --themesDir ../../
        working-directory: ./exampleSite
      - name: Install ImageMagick
        run: sudo apt-get update && sudo apt-get install -y imagemagick
      - name: Install playwright and its dependencies
        run: |
          npm init -y
          npm install playwright
          npx playwright install
      - name: Serve both versions and wait for them to be ready
        run: |
          npx http-server ./exampleSite/public-master -p 8080 &
          npx http-server ./exampleSite/public-pr -p 8081 &
          sleep 15

      - name: Take screenshots of various pages on version with and without new changes
        run: |
          # home
          npx playwright screenshot http://localhost:8080 master-home.png
          npx playwright screenshot http://localhost:8081 pr-home.png

          # blog markdown test page
          npx playwright screenshot http://localhost:8080/blog/2019/03/markdown-syntax-guide/ master-markdown.png
          npx playwright screenshot http://localhost:8081/blog/2019/03/markdown-syntax-guide/ pr-markdown.png

          subpages=("resume" "blog" "hugo-gallery" "contact" "categories")
          for page in "${subpages[@]}"; do
            npx playwright screenshot --full-page http://localhost:8080/${page} master-${page}.png
            npx playwright screenshot --full-page http://localhost:8081/${page} pr-${page}.png
          done
      - name: Equalize screenshots size
        run: |
          subpages=("resume" "blog" "hugo-gallery" "contact" "categories")
          screenshots=("${subpages[@]}" "home" "markdown")
          for screenshot in "${screenshots[@]}"; do
            echo "Equalize height of screenshots pr-${screenshot}.png and master-${screenshot}.png..."
            HEIGHT_PR=$(identify-im6.q16 -format "%h" "pr-${screenshot}.png")
            HEIGHT_MASTER=$(identify-im6.q16 -format "%h" "master-${screenshot}.png")
            MAX_HEIGHT=$((HEIGHT_PR > HEIGHT_MASTER ? HEIGHT_PR : HEIGHT_MASTER))
            convert-im6.q16 "pr-${screenshot}.png" -background white -extent x${MAX_HEIGHT} "pr-${screenshot}.png"
            convert-im6.q16 "master-${screenshot}.png" -background white -extent x${MAX_HEIGHT} "master-${screenshot}.png"
          done
      - name: Compare screenshots
        id: diff
        run: |
          mkdir diffs
          has_any_changes=false
          subpages=("resume" "blog" "hugo-gallery" "contact" "categories")
          screenshots=("${subpages[@]}" "home" "markdown")
          for screenshot in "${screenshots[@]}"; do
            echo "Comparing files pr-${screenshot}.png and master-${screenshot}.png..."
            if npx pixelmatch "master-${screenshot}.png" "pr-${screenshot}.png" "diffs/${screenshot}.png" 0.1; then
              echo 'No changes detected'
            else
              echo 'Changes detected'
              has_any_changes=true
            fi
            echo "has_changes=${has_any_changes}" >> $GITHUB_OUTPUT
          done
      - name: Upload diff images
        uses: actions/upload-artifact@v4
        if: always()
        with:
          name: visuals-diffs
          path: diffs/
      - name: Comment on PR
        uses: actions/github-script@v7
        if: steps.diff.outputs.has_changes == 'true'
        with:
          script: |
            github.rest.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: '⚠️ Visual changes detected! Check artifacts for diffs.'
            })