name: 'Notify Email'
description: 'Send Gitea Actions run result via SMTP (163/126 compatible)'
author: 'gitea_admin'

inputs:
  smtp_host:
    description: 'SMTP host (e.g. smtp.126.com)'
    required: true
  smtp_port:
    description: 'SMTP SSL port'
    required: false
    default: '465'
  smtp_user:
    description: 'SMTP user (full email address)'
    required: true
  smtp_pass:
    description: 'SMTP authorization code'
    required: true
  from:
    description: 'From address'
    required: false
    default: ${{ inputs.smtp_user }}
  to:
    description: 'Recipient(s), comma separated'
    required: true
  subject:
    description: 'Email subject'
    required: true
  body:
    description: 'Email body (plain text)'
    required: true

runs:
  using: 'composite'
  steps:
    - name: Send email via SMTP
      shell: bash
      env:
        SMTP_HOST: ${{ inputs.smtp_host }}
        SMTP_PORT: ${{ inputs.smtp_port }}
        SMTP_USER: ${{ inputs.smtp_user }}
        SMTP_PASS: ${{ inputs.smtp_pass }}
        FROM_ADDR: ${{ inputs.from }}
        TO_ADDR: ${{ inputs.to }}
        SUBJECT: ${{ inputs.subject }}
        BODY: ${{ inputs.body }}
      run: |
        set -u
        # 构造 --mail-rcpt 参数（每个收件人一个）
        RCPT_ARGS=""
        IFS=','
        for addr in $TO_ADDR; do
          RCPT_ARGS="$RCPT_ARGS --mail-rcpt $(printf '%s' "$addr" | sed 's/^[[:space:]]*//;s/[[:space:]]*$//')"
        done
        unset IFS

        # 整封邮件拼好（headers + 空行 + body）从 stdin 给 curl --upload-file -
        # 避开 "-H + --upload-file -" 组合在 smtps:// 下不生效的 bug（curl 不会把 -H
        # 头部合并进 DATA 段，结果只发空 body）。v1.0.0 是这么写的，1.0.1 改成全量 stdin。
        # 同时给出一个明确的 Date 头部，避免 163 反垃圾系统把无 Date 的邮件归类。
        DATE_HDR=$(date -R)
        EMAIL=$(printf 'From: %s\nTo: %s\nSubject: %s\nMIME-Version: 1.0\nContent-Type: text/plain; charset=UTF-8\nDate: %s\n\n%s' \
                       "$FROM_ADDR" "$TO_ADDR" "$SUBJECT" "$DATE_HDR" "$BODY")
        # shellcheck disable=SC2086
        if ! printf '%s' "$EMAIL" | curl -fsS --ssl \
            --url "smtps://${SMTP_HOST}:${SMTP_PORT}" \
            --user "${SMTP_USER}:${SMTP_PASS}" \
            --mail-from "${FROM_ADDR}" \
            $RCPT_ARGS \
            --max-time 15 --retry 2 \
            --upload-file -; then
          echo "::warning::Email send failed (non-fatal)"
        fi