name: 'Setup Gordon'
description: 'Install the Gordon CLI binary into the runner PATH'
author: 'Gordon Contributors'

branding:
  icon: 'download-cloud'
  color: 'blue'

inputs:
  version:
    description: 'Gordon version to install (e.g. v2.0.0 or latest)'
    required: false
    default: 'latest'

outputs:
  version:
    description: 'The version of Gordon that was installed'
    value: ${{ steps.install.outputs.version }}
  path:
    description: 'Path to the installed Gordon binary'
    value: ${{ steps.install.outputs.path }}

runs:
  using: 'composite'
  steps:
    - name: Install Gordon
      id: install
      shell: bash
      run: |
        set -euo pipefail

        # Map RUNNER_OS to gordon OS identifier
        case "${RUNNER_OS}" in
          Linux)  os="linux" ;;
          macOS)  os="darwin" ;;
          *)      echo "Unsupported OS: ${RUNNER_OS}" >&2; exit 1 ;;
        esac

        # Map RUNNER_ARCH to gordon arch identifier
        case "${RUNNER_ARCH}" in
          X64)    arch="amd64" ;;
          ARM64)  arch="arm64" ;;
          *)      echo "Unsupported architecture: ${RUNNER_ARCH}" >&2; exit 1 ;;
        esac

        version="${{ inputs.version }}"

        # Resolve 'latest' to an actual tag via redirect URL
        if [ "${version}" = "latest" ]; then
          redirect_url="$(curl -fsSL -o /dev/null -w '%{redirect_url}' "https://github.com/bnema/gordon/releases/latest")"
          version="${redirect_url##*/}"
          if [ -z "${version}" ]; then
            echo "Failed to resolve latest Gordon version" >&2
            exit 1
          fi
        fi

        archive="gordon_${os}_${arch}.tar.gz"
        url="https://github.com/bnema/gordon/releases/download/${version}/${archive}"
        dest="/tmp/${archive}"
        install_path="/usr/local/bin/gordon"

        echo "Installing Gordon ${version} (${os}/${arch}) from ${url}"

        # Download the release archive
        curl -fsSL -o "${dest}" "${url}"

        # Extract just the gordon binary and clean up
        tar -xzf "${dest}" -C /usr/local/bin/ gordon
        rm -f "${dest}"

        # Make executable and verify
        chmod +x "${install_path}"
        gordon version

        # Set outputs
        echo "version=${version}" >> "${GITHUB_OUTPUT}"
        echo "path=${install_path}" >> "${GITHUB_OUTPUT}"