name: "Fetch OpenBao secrets"
description: "AppRole-login to OpenBao and export requested KV v2 secrets into the job env (masked). Phase 1, spikersoft-issues#545."

inputs:
  role-id:
    description: "AppRole role_id — the repo's BAO_ROLE_ID Actions secret."
    required: true
  secret-id:
    description: "AppRole secret_id — the repo's BAO_SECRET_ID Actions secret."
    required: true
  bao-addr:
    description: "OpenBao address."
    required: false
    default: "https://bao.spikersoft.com"
  secrets:
    description: |
      One mapping per line:  ENV_NAME  <kv-v2-path>  <field>
      The path is exactly what you'd pass to `bao kv get` (mount + logical path).
      Blank lines and `#` comments are ignored. Example:
        DOCKER_PASSWORD  secret/ci/shared/registry       password
        VIDEOS_S3_KEY    secret/ci/backend/minio/videos  secret_key
    required: true

runs:
  using: "composite"
  steps:
    - shell: bash
      env:
        BAO_ADDR: ${{ inputs.bao-addr }}
        BAO_ROLE_ID: ${{ inputs.role-id }}
        BAO_SECRET_ID: ${{ inputs.secret-id }}
        BAO_SECRETS: ${{ inputs.secrets }}
      run: |
        set -euo pipefail
        command -v curl >/dev/null || { echo "::error::bao-secrets needs 'curl' on the runner"; exit 1; }
        command -v jq   >/dev/null || { echo "::error::bao-secrets needs 'jq' on the runner"; exit 1; }

        # 1) AppRole login -> short-lived (15m) token. No -f so we can read the
        #    error body; the token check below is the real gate.
        login=$(curl -s --max-time 15 -X POST \
          --data "{\"role_id\":\"${BAO_ROLE_ID}\",\"secret_id\":\"${BAO_SECRET_ID}\"}" \
          "${BAO_ADDR}/v1/auth/approle/login") || true
        TOKEN=$(printf '%s' "$login" | jq -r '.auth.client_token // empty')
        if [ -z "$TOKEN" ]; then
          echo "::error::OpenBao AppRole login failed: $(printf '%s' "$login" | jq -rc '.errors // "no response / network error"')"
          exit 1
        fi
        echo "::add-mask::$TOKEN"

        # 2) fetch each requested secret into $GITHUB_ENV (masked, multiline-safe)
        while IFS= read -r line; do
          line="${line%%#*}"
          # shellcheck disable=SC2086
          set -- $line
          [ "$#" -eq 0 ] && continue
          if [ "$#" -ne 3 ]; then
            echo "::error::bad 'secrets' line (need: ENV_NAME <kv-v2-path> <field>): ${line}"
            exit 1
          fi
          env_name="$1"; path="$2"; field="$3"
          mount="${path%%/*}"; rest="${path#*/}"      # KV v2: <mount>/data/<rest>
          resp=$(curl -s --max-time 15 -H "X-Vault-Token: $TOKEN" \
            "${BAO_ADDR}/v1/${mount}/data/${rest}") || true
          val=$(printf '%s' "$resp" | jq -r --arg f "$field" '.data.data[$f] // empty')
          if [ -z "$val" ]; then
            echo "::error::no value at '${path}' field '${field}' (wrong path/field, or this role's policy denies it): $(printf '%s' "$resp" | jq -rc '.errors // "empty"')"
            exit 1
          fi
          # mask every line of the value (handles multiline secrets like keys)
          while IFS= read -r vline; do [ -n "$vline" ] && echo "::add-mask::$vline"; done <<< "$val"
          {
            echo "${env_name}<<__BAO_EOF__"
            printf '%s\n' "$val"
            echo "__BAO_EOF__"
          } >> "$GITHUB_ENV"
          echo "  ✓ ${env_name}  <-  ${path}#${field}"
        done <<< "$BAO_SECRETS"

        # 3) drop the token (short-lived anyway — just tidy)
        curl -s --max-time 10 -H "X-Vault-Token: $TOKEN" \
          -X POST "${BAO_ADDR}/v1/auth/token/revoke-self" >/dev/null 2>&1 || true