name: 'Slack Notification'
description: 'Generic action to send Slack notifications with optional message updates and automatic status detection'
inputs:
  slack-bot-token:
    description: 'Slack bot token for authentication'
    required: true
  payload-file-path:
    description: 'Path to JSON file with the Slack message payload'
    required: true
  update-ts:
    description: 'Message timestamp to update (only for updates, leave empty for new messages)'
    required: false
    default: ''
  step-outcome:
    description: 'Outcome of a step to determine status (success/failure) - automatically sets STATUS_TEXT and STATUS_COLOR env vars'
    required: false
    default: ''
outputs:
  ts:
    description: 'Timestamp of the Slack message'
    value: ${{ steps.slack-notification.outputs.ts }}
runs:
  using: 'composite'
  steps:
    - name: Determine status
      id: status
      shell: bash
      run: |
        if [[ "${{ inputs.step-outcome }}" == "success" ]]; then
          echo "STATUS_TEXT=Completed" >> $GITHUB_ENV
          echo "STATUS_COLOR=#6aa84f" >> $GITHUB_ENV
        elif [[ "${{ inputs.step-outcome }}" == "failure" ]]; then
          echo "STATUS_TEXT=Failed" >> $GITHUB_ENV
          echo "STATUS_COLOR=#fc3434" >> $GITHUB_ENV
        else
          # No outcome provided - pending/in progress state
          echo "STATUS_COLOR=#dbab09" >> $GITHUB_ENV
        fi

    - name: Send Slack notification (new message)
      if: inputs.update-ts == ''
      id: slack-notification-post
      uses: slackapi/slack-github-action@91efab103c0de0a537f72a35f6b8cda0ee76bf0a # v2.1.1
      env:
        SLACK_PAYLOAD_FILE_PATH: ${{ inputs.payload-file-path }}
      with:
        method: chat.postMessage
        token: ${{ inputs.slack-bot-token }}
        payload-file-path: ${{ inputs.payload-file-path }}
        payload-templated: true
        errors: true

    - name: Update Slack notification
      if: inputs.update-ts != ''
      id: slack-notification-update
      uses: slackapi/slack-github-action@91efab103c0de0a537f72a35f6b8cda0ee76bf0a # v2.1.1
      env:
        SLACK_PAYLOAD_FILE_PATH: ${{ inputs.payload-file-path }}
      with:
        method: chat.update
        token: ${{ inputs.slack-bot-token }}
        payload-file-path: ${{ inputs.payload-file-path }}
        payload-templated: true
        errors: true

    - name: Set output
      id: slack-notification
      shell: bash
      run: |
        if [[ "${{ inputs.update-ts }}" == "" ]]; then
          echo "ts=${{ steps.slack-notification-post.outputs.ts }}" >> $GITHUB_OUTPUT
        else
          echo "ts=${{ inputs.update-ts }}" >> $GITHUB_OUTPUT
        fi