#!/usr/bin/env bash
# nc-make-jump.sh — generate the 3-thread jump pattern for cross-environment
# data replay during a Cloverleaf migration. Matches Bryan's house pattern
# (linux_<tag>_out / windows_<tag>_in / windows_<tag>_out).
#
# Topology:
#
#   OLD env (e.g. windows)              NEW env (linux)
#   ── adt site (existing) ──           ── server_jump site (new) ──         ── adt site (cloned, unchanged) ──
#   ┌─────────────────────┐             ┌────────────────────────────┐       ┌─────────────────────────┐
#   │ <existing inbound>  │             │ windows_<tag>_in (NEW)     │       │ <existing inbound>      │
#   │  ├─→ existing dests │             │   tcpip-server, ISSERVER=1 │       │   listens on ORIG_PORT  │
#   │  └─→ linux_<tag>_   │   ──TCP──→  │   PORT = jump_port         │       │  (UNCHANGED — no route  │
#   │      out (NEW)      │             │      │ internal route      │       │   changes here)         │
#   │      tcpip-client   │             │      ▼                     │       │                         │
#   │      → jump_port    │             │ windows_<tag>_out (NEW)    │       │  ▲                      │
#   └─────────────────────┘             │   tcpip-client             │       │  │                      │
#                                       │   HOST=127.0.0.1           │       │  │ TCP localhost        │
#                                       │   PORT=ORIG_PORT  ─────────┼───────┘  │ ──────────────────── │
#                                       └────────────────────────────┘                                 │
#                                                                                                       │
#                       (so OLD's existing inbound gets ONE new route; NEW's existing inbound is UNTOUCHED)
#
# Three new protocol blocks:
#   1. `linux_<tag>_out`     → add to OLD env NetConfig (same process as original inbound).
#   2. `windows_<tag>_in`    → add to NEW env server_jump/NetConfig.
#   3. `windows_<tag>_out`   → add to NEW env server_jump/NetConfig.
#
# Plus one route-add snippet for OLD's existing inbound's DATAXLATE block.
#
# Tag = inbound thread name (auto-derived per Bryan's preference).
#
# Usage:
#   nc-make-jump.sh <netconfig> --inbound NAME --new-host HOST --jump-port PORT
#                   [--inbound-host HOST]      # default 127.0.0.1
#                   [--process-jump PROC]      # process for NEW-side threads, default server_jump
#                   [--encoding ENC]           # default = ENCODING from existing inbound
#                   [--out-prefix PREFIX]      # write files instead of stdout
set -u
set -o pipefail

NC_SELF="$0"
LIB_DIR="$(cd "$(dirname "$NC_SELF")" && pwd)"
NCP="$LIB_DIR/nc-parse.sh"

die() { printf 'nc-make-jump: %s\n' "$*" >&2; exit 1; }

NC=""
INBOUND=""
NEW_HOST=""
JUMP_PORT=""
INBOUND_HOST="127.0.0.1"
PROC_JUMP="server_jump"
ENC_OVERRIDE=""
OUT_PREFIX=""

while [ $# -gt 0 ]; do
  case "$1" in
    --inbound)        shift; INBOUND="$1" ;;
    --new-host)       shift; NEW_HOST="$1" ;;
    --jump-port)      shift; JUMP_PORT="$1" ;;
    --inbound-host)   shift; INBOUND_HOST="$1" ;;
    --process-jump)   shift; PROC_JUMP="$1" ;;
    --encoding)       shift; ENC_OVERRIDE="$1" ;;
    --out-prefix)     shift; OUT_PREFIX="$1" ;;
    -h|--help)        sed -n '2,50p' "$NC_SELF"; exit 0 ;;
    -*)               die "unknown flag: $1" ;;
    *)                [ -z "$NC" ] && NC="$1" || die "extra arg: $1" ;;
  esac
  shift
done

[ -n "$NC" ]        || die "usage: see --help"
[ -n "$INBOUND" ]   || die "missing --inbound"
[ -n "$NEW_HOST" ]  || die "missing --new-host"
[ -n "$JUMP_PORT" ] || die "missing --jump-port"
[ -f "$NC" ]        || die "not a file: $NC"

# Read fields from the existing inbound
T_PROCESS=$("$NCP" protocol-field "$NC" "$INBOUND" PROCESSNAME 2>/dev/null | head -1)
[ -n "$T_PROCESS" ] || die "no such protocol in $NC: $INBOUND"

T_ENC=$("$NCP" protocol-field "$NC" "$INBOUND" ENCODING 2>/dev/null | head -1)
[ -z "$T_ENC" ] && T_ENC="ASCII"
ENC="${ENC_OVERRIDE:-$T_ENC}"

ORIG_PORT=$("$NCP" protocol-nested "$NC" "$INBOUND" PROTOCOL.PORT 2>/dev/null | head -1)
# F-2 fix (2026-06-08): protocol-nested returns the literal string "{}" for
# file/ICL inbounds whose PORT block is empty ({ PORT {} }).  The old guard
# only tested for empty string, so "{}" (non-empty) slipped through and the
# generated thread carried "{ PORT {} }" — a broken TCP client with no port.
# Treat empty, "{}", and any non-numeric value as "no port" and die clearly.
case "$ORIG_PORT" in
  ''|'{}'|*[!0-9]*)
    die "could not read a numeric PROTOCOL.PORT for inbound '$INBOUND' (got: '${ORIG_PORT:-<empty>}'). Is it a TCP listener? File/ICL inbounds do not use this jump pattern." ;;
esac

# tag = the inbound name itself (Bryan's "auto-derived" preference)
TAG="$INBOUND"

OLD_OUT_NAME="linux_${TAG}_out"
NEW_IN_NAME="windows_${TAG}_in"
NEW_OUT_NAME="windows_${TAG}_out"

# ─────────────────────────────────────────────────────────────────────────────
# Common helpers — emit the standard set of fields that every protocol block
# carries. Differences between the three threads are isolated below.
# ─────────────────────────────────────────────────────────────────────────────
emit_dataformat_passthrough() {
  cat <<'EOF'
    { DATAFORMAT {
        { FRLTYPE offlen }
        { OFFLEN { { LEN 0 } { OFF 0 } } }
        { TYPE frl }
    } }
EOF
}

emit_edibatch_empty() {
  cat <<'EOF'
    { EDIBATCH {
        { IN_DATA  { { TYPE {} } { VERSION {} } } }
        { OUT_DATA { { HEADER {} } { TRIGGER { { COUNT {} } { SCHEDULER {} } { TIMER {} } } } { TYPE {} } { VERSION {} } } }
    } }
EOF
}

emit_errdbtps_default() {
  cat <<'EOF'
    { ERRDBTPS {
        { ERRTPSPROCS { { ARGS {} } { PROCS {} } { PROCSCONTROL {} } } }
        { RETRIES -1 }
    } }
EOF
}

emit_proc_blocks_empty() {
  cat <<'EOF'
    { RECVCONTROL { { ACKCONTROL { { ARGS {} } { PROCS {} } { PROCSCONTROL {} } } } { EOMSG {} } { HOLDMSGS 0 } { MSGPRIO 5120 } } }
    { SAVECONTROL { { ARGS {} } { PROCS {} } { PROCSCONTROL {} } } }
    { TPS_INBOUND  { { ARGS {} } { PROCS {} } { PROCSCONTROL {} } } }
    { TPS_OUTBOUND { { ARGS {} } { PROCS {} } { PROCSCONTROL {} } } }
    { TRACING 0 }
EOF
}

emit_inner_protocol_tcp_client() {
  local host="$1" port="$2"
  cat <<EOF
    { PROTOCOL {
        { CA_FILE {} }
        { CA_PATH {} }
        { CERT_FILE {} }
        { CIPHERSUITES {} }
        { CLOSE 0 }
        { CONTROLMSGS 0 }
        { COPYCLIENTIPP 0 }
        { DELAYCONNECT 0 }
        { ENCODE_FILL {} }
        { ENCODE_INCLUSIVE 1 }
        { ENCODE_ISNATIVE 0 }
        { ENCODE_JUST r }
        { ENCODE_LEN 4 }
        { ENCODE_TYPE encapsulated }
        { HOST ${host} }
        { IPV4_V6_DUAL 0 }
        { IS_SSL 0 }
        { ISMULTI 0 }
        { ISSERVER 0 }
        { LOCAL_IP {} }
        { MAXCLIENT 0 }
        { MAXOBQD 0 }
        { MAXPREXLTQD 0 }
        { MLP_ERROR RESET }
        { MLP_MODE MLP }
        { MLP_TIMEOUT 30 }
        { MODE {} }
        { PASSWORD {} }
        { PORT ${port} }
        { PRIVATE_KEY {} }
        { RECONNECT 1 }
        { REOPEN 5 }
        { SSL_PROTOCOL All }
        { TCP_CONNECTION_TIMEOUT {} }
        { TYPE tcpip }
        { WRITEZERO 0 }
    } }
EOF
}

emit_inner_protocol_tcp_server() {
  local port="$1"
  cat <<EOF
    { PROTOCOL {
        { CA_FILE {} }
        { CA_PATH {} }
        { CERT_FILE {} }
        { CIPHERSUITES {} }
        { CLOSE 0 }
        { CONTROLMSGS 0 }
        { COPYCLIENTIPP 0 }
        { DELAYCONNECT 0 }
        { ENCODE_FILL {} }
        { ENCODE_INCLUSIVE 1 }
        { ENCODE_ISNATIVE 0 }
        { ENCODE_JUST r }
        { ENCODE_LEN 4 }
        { ENCODE_TYPE encapsulated }
        { HOST {} }
        { IPV4_V6_DUAL 0 }
        { IS_SSL 0 }
        { ISMULTI 0 }
        { ISSERVER 1 }
        { LOCAL_IP {} }
        { MAXCLIENT 0 }
        { MAXOBQD 0 }
        { MAXPREXLTQD 0 }
        { MLP_ERROR RESET }
        { MLP_MODE MLP }
        { MLP_TIMEOUT 30 }
        { MODE {} }
        { PASSWORD {} }
        { PORT ${port} }
        { PRIVATE_KEY {} }
        { RECONNECT 1 }
        { REOPEN 5 }
        { SSL_PROTOCOL All }
        { TCP_CONNECTION_TIMEOUT {} }
        { TYPE tcpip }
        { WRITEZERO 0 }
    } }
EOF
}

# ─────────────────────────────────────────────────────────────────────────────
# Thread 1 — OLD env: linux_<tag>_out
#   Outbound TCP client, same process as the existing inbound.
#   No DATAXLATE (pass-through). Receives data via the route-add on the original inbound.
# ─────────────────────────────────────────────────────────────────────────────
emit_old_out() {
  printf 'protocol %s {\n' "$OLD_OUT_NAME"
  cat <<EOF
    { AUTOSTART 1 }
    { BITMAP {} }
    { COORDS {0 0} }
EOF
  emit_dataformat_passthrough
  printf '    { DATAXLATE {\n\n    } }\n'
  emit_edibatch_empty
  cat <<EOF
    { ENCODING ${ENC} }
    { ENCODING_BOM_IB 0 }
    { ENCODING_BOM_OB 0 }
    { ENCODING_HL7 0 }
    { ENCODING_XML 0 }
    { EOCONFIG {} }
EOF
  emit_errdbtps_default
  cat <<EOF
    { GROUPS {server_jump OB_jump} }
    { HOSTDOWN 0 }
    { ICLSERVERPORT {} }
    { KEEPMSGONDISK 0 }
    { META {} }
    { OBWORKASIB 0 }
    { OUTBOUNDONLY 1 }
    { PROCESSNAME ${T_PROCESS} }
EOF
  emit_inner_protocol_tcp_client "$NEW_HOST" "$JUMP_PORT"
  emit_proc_blocks_empty
  printf '}\n'
}

# ─────────────────────────────────────────────────────────────────────────────
# Thread 2 — NEW env, server_jump site: windows_<tag>_in
#   Inbound TCP server. Routes internally to windows_<tag>_out (same site).
# ─────────────────────────────────────────────────────────────────────────────
emit_new_in() {
  printf 'protocol %s {\n' "$NEW_IN_NAME"
  cat <<EOF
    { AUTOSTART 1 }
    { BITMAP {} }
    { COORDS {0 0} }
EOF
  emit_dataformat_passthrough
  cat <<EOF
    { DATAXLATE {
        {
            { CACHEMSG 0 }
            { DEL_ON_ERR_ROUTE 0 }
            { ROUTE_DETAILS {
                {
                    { DEST ${NEW_OUT_NAME} }
                    { PROCS { { ARGS {} } { PROCS {} } { PROCSCONTROL {} } } }
                    { TYPE raw }
                }
            } }
            { ROUTE_ENABLED 1 }
            { TRXID .* }
            { WILDCARD ON }
        }
    } }
EOF
  emit_edibatch_empty
  cat <<EOF
    { ENCODING ${ENC} }
    { ENCODING_BOM_IB 0 }
    { ENCODING_BOM_OB 0 }
    { ENCODING_HL7 0 }
    { ENCODING_XML 0 }
    { EOCONFIG {} }
EOF
  emit_errdbtps_default
  cat <<EOF
    { GROUPS {server_jump IB_jump} }
    { HOSTDOWN 0 }
    { ICLSERVERPORT {} }
    { KEEPMSGONDISK 0 }
    { META {} }
    { OBWORKASIB 0 }
    { OUTBOUNDONLY 0 }
    { PROCESSNAME ${PROC_JUMP} }
EOF
  emit_inner_protocol_tcp_server "$JUMP_PORT"
  emit_proc_blocks_empty
  printf '}\n'
}

# ─────────────────────────────────────────────────────────────────────────────
# Thread 3 — NEW env, server_jump site: windows_<tag>_out
#   Outbound TCP client, connects to localhost on the ORIGINAL inbound port.
#   Receives via internal route from windows_<tag>_in.
# ─────────────────────────────────────────────────────────────────────────────
emit_new_out() {
  printf 'protocol %s {\n' "$NEW_OUT_NAME"
  cat <<EOF
    { AUTOSTART 1 }
    { BITMAP {} }
    { COORDS {0 0} }
EOF
  emit_dataformat_passthrough
  printf '    { DATAXLATE {\n\n    } }\n'
  emit_edibatch_empty
  cat <<EOF
    { ENCODING ${ENC} }
    { ENCODING_BOM_IB 0 }
    { ENCODING_BOM_OB 0 }
    { ENCODING_HL7 0 }
    { ENCODING_XML 0 }
    { EOCONFIG {} }
EOF
  emit_errdbtps_default
  cat <<EOF
    { GROUPS {server_jump OB_jump} }
    { HOSTDOWN 0 }
    { ICLSERVERPORT {} }
    { KEEPMSGONDISK 0 }
    { META {} }
    { OBWORKASIB 0 }
    { OUTBOUNDONLY 1 }
    { PROCESSNAME ${PROC_JUMP} }
EOF
  emit_inner_protocol_tcp_client "$INBOUND_HOST" "$ORIG_PORT"
  emit_proc_blocks_empty
  printf '}\n'
}

# ─────────────────────────────────────────────────────────────────────────────
# Route-add snippet — to splice into the OLD env existing inbound's DATAXLATE block.
# ─────────────────────────────────────────────────────────────────────────────
emit_route_add() {
  cat <<EOF
{
    { CACHEMSG 0 }
    { DEL_ON_ERR_ROUTE 0 }
    { ROUTE_DETAILS {
        {
            { DEST ${OLD_OUT_NAME} }
            { PROCS { { ARGS {} } { PROCS {} } { PROCSCONTROL {} } } }
            { TYPE raw }
        }
    } }
    { ROUTE_ENABLED 1 }
    { TRXID .* }
    { WILDCARD ON }
}
EOF
}

# ─────────────────────────────────────────────────────────────────────────────
# Output
# ─────────────────────────────────────────────────────────────────────────────
if [ -n "$OUT_PREFIX" ]; then
  emit_old_out   > "${OUT_PREFIX}.old_out.tcl"
  emit_new_in    > "${OUT_PREFIX}.new_in.tcl"
  emit_new_out   > "${OUT_PREFIX}.new_out.tcl"
  emit_route_add > "${OUT_PREFIX}.route_add.tcl"
  printf '%s\n%s\n%s\n%s\n' \
    "${OUT_PREFIX}.old_out.tcl" \
    "${OUT_PREFIX}.new_in.tcl" \
    "${OUT_PREFIX}.new_out.tcl" \
    "${OUT_PREFIX}.route_add.tcl"
else
  cat <<EOF
# ═════════════════════════════════════════════════════════════════════════════
# Jump-thread set for inbound '${INBOUND}'
#   tag (auto)        = ${TAG}
#   OLD process       = ${T_PROCESS}
#   NEW process       = ${PROC_JUMP}
#   ENCODING          = ${ENC}
#   ORIG inbound port = ${ORIG_PORT}  (used by windows_${TAG}_out → 127.0.0.1)
#   JUMP TCP port     = ${JUMP_PORT}  (OLD → NEW, used by linux_${TAG}_out and windows_${TAG}_in)
#   NEW linux host    = ${NEW_HOST}
#   NEW-side dest     = ${INBOUND_HOST}:${ORIG_PORT}
# ═════════════════════════════════════════════════════════════════════════════

# ── ① OLD env — add to NetConfig (process ${T_PROCESS}) ──
EOF
  emit_old_out
  cat <<EOF

# ── ② NEW env — add to server_jump/NetConfig (process ${PROC_JUMP}) ──
EOF
  emit_new_in
  echo ""
  emit_new_out
  cat <<EOF

# ── ③ ROUTE_ADD snippet — splice into OLD inbound '${INBOUND}' DATAXLATE block ──
EOF
  emit_route_add
fi