name: Build and Deploy Docs

on:
  push:
    branches:
      - main
      - 'v*'
    tags:
      - 'v*'

jobs:
  build-deploy-docs:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout Product Repo
        uses: actions/checkout@v2
        with:
          fetch-depth: 0

      - name: Set Variables Based on Ref
        id: vars
        run: |
          PRODUCT_NAME=$(basename $(pwd))  # Get the directory name as the product name
          echo "PRODUCT_NAME=$PRODUCT_NAME" >> $GITHUB_ENV
          CURRENT_REF=${GITHUB_REF##*/}
          IS_SEMVER=false
          SEMVER_REGEX="^v([0-9]+)\.([0-9]+)\.([0-9]+)$"

          if [[ "${GITHUB_REF_TYPE}" == "branch" ]]; then
            if [[ "$CURRENT_REF" == "main" ]]; then
              echo "VERSION=main" >> $GITHUB_ENV
              echo "BRANCH=main" >> $GITHUB_ENV
            elif [[ "$CURRENT_REF" =~ $SEMVER_REGEX ]]; then
              IS_SEMVER=true
              echo "VERSION=$CURRENT_REF" >> $GITHUB_ENV
              echo "BRANCH=$CURRENT_REF" >> $GITHUB_ENV
            else
              echo "Branch '$CURRENT_REF' is not a valid semantic version. Skipping build."
              exit 0
            fi
          elif [[ "${GITHUB_REF_TYPE}" == "tag" ]]; then
            if [[ "$CURRENT_REF" =~ $SEMVER_REGEX ]]; then
              IS_SEMVER=true
              echo "VERSION=$CURRENT_REF" >> $GITHUB_ENV
              echo "BRANCH=main" >> $GITHUB_ENV  # Set BRANCH to 'main' for tags
            else
              echo "Tag '$CURRENT_REF' is not a valid semantic version. Skipping build."
              exit 0
            fi
          fi

          # Gather branches and tags, filter for semantic versions, sort, remove duplicates
          VERSIONS=$(git for-each-ref refs/remotes/origin refs/tags --format="%(refname:short)" | \
            grep -E "^v[0-9]+\.[0-9]+\.[0-9]+$" | sort -Vr | uniq | tr '\n' ',' | sed 's/,$//')
          echo "VERSIONS=main,$VERSIONS" >> $GITHUB_ENV

      - name: Install Hugo
        run: |
          wget https://github.com/gohugoio/hugo/releases/download/v0.79.1/hugo_extended_0.79.1_Linux-64bit.tar.gz
          tar -xzvf hugo_extended_0.79.1_Linux-64bit.tar.gz
          sudo mv hugo /usr/local/bin/

      - name: Checkout Docs Repo
        uses: actions/checkout@v2
        with:
          repository: infinilabs/docs
          path: docs-output
          token: ${{ secrets.DOCS_DEPLOYMENT_TOKEN }}

      - name: Build Documentation
        run: |
          (cd docs && OUTPUT=$(pwd)/../docs-output make docs-build docs-place-redirect)

      - name: Commit and Push Changes to Docs Repo
        working-directory: docs-output
        run: |
          git config user.name "GitHub Actions"
          git config user.email "actions@github.com"
          
          if [[ -n $(git status --porcelain) ]]; then
            git add .
            git commit -m "Rebuild $PRODUCT_NAME docs for version $VERSION"
            git push origin main
          else
            echo "No changes to commit."
          fi

      - name: Rebuild Docs for Latest Version (main), if not already on main
        run: |
          # Only rebuild the main branch docs if the current ref is not "main"
          if [[ "$CURRENT_REF" != "main" ]]; then
            echo "Switching to main branch and rebuilding docs for 'latest'"

            # Checkout the main branch of the product repo to rebuild docs for "latest"
            git checkout main

            # Ensure the latest changes are pulled
            git pull origin main
            
            # Build Docs for Main Branch (latest)
            (cd docs && OUTPUT=$(pwd)/../docs-output VERSION="main" BRANCH="main" make docs-build docs-place-redirect)

            # Commit and Push Latest Docs to Main
            cd docs-output
            git config user.name "GitHub Actions"
            git config user.email "actions@github.com"
            
            if [[ -n $(git status --porcelain) ]]; then
              git add .
              git commit -m "Rebuild $PRODUCT_NAME docs for main branch with latest version"
              git push origin main
            else
              echo "No changes to commit for main."
            fi
          else
            echo "Current ref is 'main', skipping rebuild for 'latest'."
          fi
        working-directory: ./  # Working in the product repo
