---
name: cached-virtualenv
description: Setup a cached python virtual environment

inputs:
  name:
    required: true
    type: string
    description: The Virtualenv Name
  cache-seed:
    required: true
    type: string
    description: Seed used to invalidate caches
outputs:
  cache-hit:
    value: ${{ steps.cache-virtualenv.outputs.cache-hit }}
  cache-key:
    value: ${{ steps.setup-cache-key.outputs.cache-key }}
  python-executable:
    value: ${{ steps.define-python-executable.outputs.python-executable }}


env:
  PIP_INDEX_URL: https://pypi-proxy.saltstack.net/root/local/+simple/
  PIP_EXTRA_INDEX_URL: https://pypi.org/simple


runs:
  using: composite

  steps:

    - name: Get Python Version
      id: get-python-version
      uses: ./.github/actions/get-python-version
      with:
        python-binary: python3

    - name: Setup Cache Key
      shell: bash
      id: setup-cache-key
      run: |
        echo "cache-key=${{ inputs.cache-seed }}|${{ runner.os }}|${{ runner.arch }}|cached-venv|${{ steps.get-python-version.outputs.version }}|${{ inputs.name }}" >> "${GITHUB_OUTPUT}"

    - name: Define VirtualEnv path
      shell: bash
      id: virtualenv-path
      run: |
        cd ${{ github.workspace }} > /dev/null 2>&1 || true
        VENVS_PATH=$(echo ".venvs/py${{ steps.get-python-version.outputs.version }}" | python3 -c 'import sys, pathlib; sys.stdout.write(pathlib.Path.cwd().joinpath(sys.stdin.read()).as_posix())')
        echo "venvs-path=$VENVS_PATH" | tee -a "$GITHUB_OUTPUT"
        VENV_PATH=$(echo ".venvs/py${{ steps.get-python-version.outputs.version }}/${{ inputs.name }}" | python3 -c 'import sys, pathlib; sys.stdout.write(pathlib.Path.cwd().joinpath(sys.stdin.read()).as_posix())')
        echo "venv-path=$VENV_PATH" | tee -a "$GITHUB_OUTPUT"

    - name: Cache VirtualEnv
      id: cache-virtualenv
      uses: actions/cache@v3
      with:
        key: ${{ steps.setup-cache-key.outputs.cache-key }}
        path: ${{ steps.virtualenv-path.outputs.venv-path }}

    - name: Create Virtualenv
      shell: bash
      if: ${{ steps.cache-virtualenv.outputs.cache-hit != 'true' }}
      run: |
        mkdir -p ${{ steps.virtualenv-path.outputs.venvs-path }}
        python3 -m venv --upgrade ${{ steps.virtualenv-path.outputs.venv-path }}

    - name: Define python executable output
      shell: bash
      id: define-python-executable
      run: |
        shopt -s nocasematch
        if [[ "${{ runner.os }}" =~ "win" ]]; then
          BIN_DIR="${{ steps.virtualenv-path.outputs.venv-path }}/Scripts"
          PY_EXE="$BIN_DIR/python.exe"
        else
          BIN_DIR="${{ steps.virtualenv-path.outputs.venv-path }}/bin"
          PY_EXE="$BIN_DIR/python3"
          if [ ! -f "$PY_EXE" ]; then
            echo "The '${PY_EXE}' binary does not exist. Setting it to '$BIN_DIR/python' ..."
            PY_EXE="$BIN_DIR/python"
          fi
          if [ ! -f "$PY_EXE" ]; then
            echo "The '${PY_EXE}' binary does not exist. Showing the tree output for '${BIN_DIR}' ..."
            tree -a "$BIN_DIR"
            exit 1
          fi
        fi
        shopt -u nocasematch
        $PY_EXE --version
        echo "python-executable=$PY_EXE" | tee -a "${GITHUB_OUTPUT}"
        echo "${BIN_DIR}" | tee -a "${GITHUB_PATH}"