# Clean up documentation preview versions from Read the Docs
# ---------------------------------------------------------
# This workflow triggers when a PR is closed (merged or abandoned).
# It checks if a docs preview was created by parsing PR comments posted
# by the bot, then deactivates the corresponding version on Read the Docs.

name: Docs Preview Cleanup

on:
  pull_request:
    types: [closed]

permissions:
  contents: read

jobs:
  cleanup:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout docs-config only
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        with:
          sparse-checkout: |
            .github/docs-config.json
          sparse-checkout-cone-mode: false

      - name: Generate a token
        id: generate-token
        uses: actions/create-github-app-token@a8d616148505b5069dccd32f177bb87d7f39123b # v2.1.1
        with:
          app-id: ${{ secrets.APP_ID }}
          private-key: ${{ secrets.APP_PRIVATE_KEY }}
          owner: ${{ github.repository_owner }}

      - name: Get project slug from preview comment
        id: rtd
        env:
          GH_TOKEN: ${{ steps.generate-token.outputs.token }}
        run: |
          # Extract project identifier from the bot's comment.
          # The JSON output for a valid commit will have "assistant-librarian[bot]"
          # for key `user.login` and contain "rocm.docs.amd.com/projects/" for key `body`
          # and we need to parse "rocm.docs.amd.com/projects/project_slug/xyz..." to "project_slug"

          comment=$(gh api repos/${{ github.repository }}/issues/${{ github.event.pull_request.number }}/comments \
            --jq '[.[] | select(.user.login == "systems-assistant[bot]" and (.body | contains("rocm.docs.amd.com/projects/")))] | last | .body')

          if [ -z "$comment" ] || [ "$comment" = "null" ]; then
            echo "No preview comment found, skipping cleanup."
            exit 0
          fi

          # Extract the string immediately following "projects/" (up to the next "/") from $comment
          project_alias=$(echo "$comment" | grep --only-matching --perl-regexp 'projects/\K[^/]+')

          # Load the map and look up the rtd_slug by rtd_alias
          project_slug=$(jq -r --arg alias "$project_alias" \
            '.projects[] | select(.rtd_alias == $alias) | .rtd_slug' \
            .github/docs-config.json)

          echo "project_slug=$project_slug" >> $GITHUB_OUTPUT

      - name: Deactivate RTD preview version
        if: steps.rtd.outputs.project_slug
        env:
          RTD_TOKEN: ${{ secrets.RTD_TOKEN }}
        run: |
          branch_name="${{ github.head_ref }}"
          # Generate slug like 'user-me-my_test_branch' from 'user/me/my_test_branch'
          version_slug="${branch_name//\//-}"

          response=$(curl \
            --connect-timeout 180 \
            --silent \
            --output /dev/null \
            --write-out "%{http_code}" \
            --request PATCH \
            --header "Authorization: Token $RTD_TOKEN" \
            --header "Content-Type: application/json" \
            --data '{"active": false}' \
            "https://app.readthedocs.com/api/v3/projects/${{ steps.rtd.outputs.project_slug }}/versions/${version_slug}/")
          echo "RTD PATCH responded with HTTP $response"