name: Notify by Email
description: |
  Send a fritzlab-themed email from a CI workflow via mail.fritzlab.net.
  Gating is the caller's responsibility (typically `if: failure()`); the
  action always sends when invoked. Auto-injects repo, branch, SHA, workflow,
  and run URL — caller supplies subject, summary, and optional details.
inputs:
  to:
    description: Recipient address.
    required: false
    default: noc@fritzlab.net
  from:
    description: Sender address. Must be permitted by mail.fritzlab.net relay rules.
    required: false
    default: ci@fritzlab.net
  status:
    description: failure | success | info — drives accent color and subject prefix.
    required: false
    default: info
  subject:
    description: Mail subject (status prefix is added automatically). Defaults to summary when empty.
    required: false
    default: ''
  summary:
    description: One-line headline rendered at the top of the email body.
    required: true
  details:
    description: Optional multiline preformatted block (rendered in a monospace card). Leave empty to omit.
    required: false
    default: ''
  smtp-host:
    description: SMTP relay host.
    required: false
    default: mail.fritzlab.net
  smtp-port:
    description: SMTP port (relay is on 25, trusted-CIDR, no auth).
    required: false
    default: '25'
runs:
  using: composite
  steps:
    - name: Send notification
      shell: bash
      env:
        NOTIFY_TO: ${{ inputs.to }}
        NOTIFY_FROM: ${{ inputs.from }}
        NOTIFY_STATUS: ${{ inputs.status }}
        NOTIFY_SUBJECT: ${{ inputs.subject }}
        NOTIFY_SUMMARY: ${{ inputs.summary }}
        NOTIFY_DETAILS: ${{ inputs.details }}
        NOTIFY_SMTP_HOST: ${{ inputs.smtp-host }}
        NOTIFY_SMTP_PORT: ${{ inputs.smtp-port }}
        GH_SERVER_URL: ${{ github.server_url }}
        GH_REPOSITORY: ${{ github.repository }}
        GH_REF_NAME: ${{ github.ref_name }}
        GH_SHA: ${{ github.sha }}
        GH_WORKFLOW: ${{ github.workflow }}
        GH_JOB: ${{ github.job }}
        GH_RUN_ID: ${{ github.run_id }}
        GH_RUN_NUMBER: ${{ github.run_number }}
        GH_RUN_ATTEMPT: ${{ github.run_attempt }}
        GH_ACTOR: ${{ github.actor }}
        GH_EVENT_NAME: ${{ github.event_name }}
      run: python3 ${{ github.action_path }}/scripts/send.py