# Sourced by managed-container; uses the shared OCF and parameter environment.

mc_pg_demote_notification_target()
{
    local allow_self="${1:-false}"
    local state_file
    local type operation promote_uname demote_uname local_node
    local now mtime age
    local promote_norm local_norm demote_norm

    state_file="/run/loxthelion/${OCF_RESOURCE_INSTANCE:-managed-container}.notify"
    local_node="${OCF_RESKEY_CRM_meta_on_node:-$(hostname)}"

    [ -r "${state_file}" ] || return 1

    now="$(date +%s)" || return 1
    mtime="$(stat -c %Y "${state_file}" 2>/dev/null)" || return 1
    age=$((now - mtime))

    [ "${age}" -ge 0 ] || return 1
    [ "${age}" -le 120 ] || return 1

    type="$(sed -n 's/^type=//p' "${state_file}" | head -n1)"
    operation="$(sed -n 's/^operation=//p' "${state_file}" | head -n1)"
    promote_uname="$(sed -n 's/^promote_uname=//p' "${state_file}" | head -n1)"
    demote_uname="$(sed -n 's/^demote_uname=//p' "${state_file}" | head -n1)"

    [ "${type}" = "pre" ] || return 1
    [ "${operation}" = "demote" ] || return 1

    local_norm="$(printf '%s' "${local_node}" | tr '[:upper:]' '[:lower:]')"
    demote_norm="$(printf '%s' "${demote_uname}" | tr '[:upper:]' '[:lower:]')"
    promote_norm="$(printf '%s' "${promote_uname}" | tr '[:upper:]' '[:lower:]')"

    [ "${demote_norm}" = "${local_norm}" ] || return 1
    [ -n "${promote_uname}" ] || return 1

    case "${promote_uname}" in
        *" "*) return 1 ;;
    esac

    if [ "${allow_self}" != true ] && [ "${promote_norm}" = "${local_norm}" ]; then
        return 1
    fi

    printf '%s\n' "${promote_uname}"
}

# Legacy callers retain the historical requirement for a distinct successor.
demote_target()
{
    mc_pg_demote_notification_target false
}

# Native-peer demotion can distinguish a true handoff from Pacemaker's
# demote/restart/re-promote of the same node after a resource-definition change.
mc_pg_native_demote_target()
{
    mc_pg_demote_notification_target true
}

managed_notify()
{
    local state_dir state_file

    state_dir="/run/loxthelion"
    state_file="${state_dir}/${OCF_RESOURCE_INSTANCE:-managed-container}.notify"

    ocf_log info \
        "notify: type=${OCF_RESKEY_CRM_meta_notify_type:-unset} operation=${OCF_RESKEY_CRM_meta_notify_operation:-unset}"

    ocf_log info \
        "notify: promote_uname=${OCF_RESKEY_CRM_meta_notify_promote_uname:-none} demote_uname=${OCF_RESKEY_CRM_meta_notify_demote_uname:-none}"

    ocf_log info \
        "notify: promoted_uname=${OCF_RESKEY_CRM_meta_notify_promoted_uname:-none} unpromoted_uname=${OCF_RESKEY_CRM_meta_notify_unpromoted_uname:-none}"

    if ! mkdir -p -m 0755 "${state_dir}"; then
        ocf_exit_reason \
            "Unable to create notification state directory ${state_dir}"
        return "${OCF_ERR_GENERIC}"
    fi

    if ! {
        printf 'timestamp=%s\n' "$(date --iso-8601=seconds)"
        printf 'node=%s\n' "$(hostname)"
        printf 'type=%s\n' "${OCF_RESKEY_CRM_meta_notify_type:-}"
        printf 'operation=%s\n' "${OCF_RESKEY_CRM_meta_notify_operation:-}"
        printf 'promote_uname=%s\n' "${OCF_RESKEY_CRM_meta_notify_promote_uname:-}"
        printf 'demote_uname=%s\n' "${OCF_RESKEY_CRM_meta_notify_demote_uname:-}"
        printf 'promoted_uname=%s\n' "${OCF_RESKEY_CRM_meta_notify_promoted_uname:-}"
        printf 'unpromoted_uname=%s\n' "${OCF_RESKEY_CRM_meta_notify_unpromoted_uname:-}"
    } > "${state_file}"
    then
        ocf_exit_reason \
            "Unable to write notification state ${state_file}"
        return "${OCF_ERR_GENERIC}"
    fi

    chmod 0600 "${state_file}" || {
        ocf_exit_reason \
            "Unable to secure notification state ${state_file}"
        return "${OCF_ERR_GENERIC}"
    }

    {
        printf '%s node=%s type=%s operation=%s promote=[%s] demote=[%s] promoted=[%s] unpromoted=[%s]\n' \
            "$(date --iso-8601=seconds)" \
            "$(hostname)" \
            "${OCF_RESKEY_CRM_meta_notify_type:-}" \
            "${OCF_RESKEY_CRM_meta_notify_operation:-}" \
            "${OCF_RESKEY_CRM_meta_notify_promote_uname:-}" \
            "${OCF_RESKEY_CRM_meta_notify_demote_uname:-}" \
            "${OCF_RESKEY_CRM_meta_notify_promoted_uname:-}" \
            "${OCF_RESKEY_CRM_meta_notify_unpromoted_uname:-}" \
            >> "${state_dir}/${OCF_RESOURCE_INSTANCE:-managed-container}.notify.log"
    } || true

    return "${OCF_SUCCESS}"
}