#!/usr/bin/env bash
# scripts/cutover/start_go_stack.sh
#
# Bring up the full Go stack persistently — alongside the live Rust
# gateway on :3100 + alongside the harness-transient stacks the
# smokes spin up. All Go daemons land on the parallel port range
# :3110 + :3211-:3220 (no collision with Rust on :3100). Persistent
# daemons run under DIFFERENT BINARY NAMES (bin/persistent-*) and
# write to a SEPARATE MinIO BUCKET (lakehouse-go-persistent) so the
# pre-push smoke chain — which uses anchored `pkill -f "bin/(name)$"`
# teardown + reads from `lakehouse-go-primary` — can run without
# tearing down or polluting our long-running state.
#
# Three isolation layers (the third was added 2026-05-01 after the
# first push test exposed a port-collision bug — smoke catalogd
# failed to bind :3212 because persistent catalogd already had it,
# but smoke's poll_health 3212 succeeded responding to the
# persistent daemon, and the smoke happily proceeded talking to
# the persistent stack with the wrong bucket expectations):
#
#   1. BINARY NAMES — persistent stack runs via symlinks
#      bin/persistent-<name> → bin/<name>. Smoke pkill pattern
#      `bin/(storaged|...|gateway)$` matches `bin/<name>$` substrings;
#      `bin/persistent-<name>` doesn't match because the slash is
#      followed by 'p', not the daemon-name first letter.
#   2. MINIO BUCKETS — persistent stack uses lakehouse-go-persistent;
#      smoke harnesses use lakehouse-go-primary. Different buckets
#      mean rehydrate paths can't see each other's `_vectors/*`
#      persistence files.
#   3. PORTS — persistent stack uses :4110 + :4211-:4219 (gateway +
#      upstreams). Smoke harness uses :3110 + :3211-:3219. Both
#      reach for the SAME chatd at :3220 because chatd is
#      read-mostly (LLM dispatch, no persistent state to clobber)
#      and operators don't want to maintain two LLM provider key
#      sets. The temp toml at /tmp/lakehouse-persistent.toml
#      overrides bucket + bind ports + upstream URLs (except chatd).
#
# Logs land in /tmp/gostack-logs/<bin>.log (one per daemon).
#
# Used to bring up the persistent stack 2026-05-01 — the first time
# the Go side has run as long-running daemons rather than per-harness
# transient processes. The 2-isolation-layer split was added the
# same day after the pre-push gate caught a smoke-vs-persistent
# collision (g1p_smoke saw count=2 when expecting count=1 because
# vectord's MinIO bucket had both the smoke's persist_demo AND the
# persistent stack's workers index).

set -euo pipefail

cd "$(dirname "$0")/../.."

if [ ! -d bin ]; then
  echo "[gostack] bin/ missing — run 'just build' first" >&2
  exit 1
fi

# ── Layer 1: symlink-based binary names ─────────────────────────────
# Create bin/persistent-* symlinks to bin/* so the persistent stack
# has distinct cmdline strings that smoke pkill won't match. Idempotent
# (existing symlinks are left alone).

DAEMONS=(storaged catalogd ingestd queryd embedd vectord pathwayd observerd matrixd gateway)

for d in "${DAEMONS[@]}"; do
  target="bin/persistent-$d"
  if [ ! -L "$target" ] && [ ! -e "$target" ]; then
    ln -s "$d" "$target"
  fi
done

# ── Layer 2: separate MinIO bucket via temp config ──────────────────
# Generate /tmp/lakehouse-persistent.toml from the canonical
# lakehouse.toml with [s3].bucket overridden. Caller can override the
# bucket name via LH_PERSISTENT_BUCKET env var.

PERSISTENT_BUCKET="${LH_PERSISTENT_BUCKET:-lakehouse-go-persistent}"
TEMP_TOML=/tmp/lakehouse-persistent.toml

# Create the bucket if missing. mc is idempotent with --ignore-existing.
if command -v mc >/dev/null 2>&1; then
  mc mb --ignore-existing "local/$PERSISTENT_BUCKET" >/dev/null 2>&1 || true
fi

# sed-replace the bucket line + port range. Anchored to specific
# substrings so accidental matches don't fire. chatd's :3220 stays
# unchanged (read-mostly LLM dispatch, no persistent state).
sed -e "s/lakehouse-go-primary/$PERSISTENT_BUCKET/g" \
    -e 's|127\.0\.0\.1:3110|127.0.0.1:4110|g' \
    -e 's|127\.0\.0\.1:3211|127.0.0.1:4211|g' \
    -e 's|127\.0\.0\.1:3212|127.0.0.1:4212|g' \
    -e 's|127\.0\.0\.1:3213|127.0.0.1:4213|g' \
    -e 's|127\.0\.0\.1:3214|127.0.0.1:4214|g' \
    -e 's|127\.0\.0\.1:3215|127.0.0.1:4215|g' \
    -e 's|127\.0\.0\.1:3216|127.0.0.1:4216|g' \
    -e 's|127\.0\.0\.1:3217|127.0.0.1:4217|g' \
    -e 's|127\.0\.0\.1:3218|127.0.0.1:4218|g' \
    -e 's|127\.0\.0\.1:3219|127.0.0.1:4219|g' \
    lakehouse.toml > "$TEMP_TOML"
echo "[gostack] config: $TEMP_TOML (bucket=$PERSISTENT_BUCKET, ports=4110+4211-4219)"

# ── Cleanup any prior persistent daemons ────────────────────────────
# Match by the persistent- prefix so smoke processes are untouched.
echo "[gostack] killing any stale persistent Go daemons (anchored on persistent-)"
pkill -f "bin/persistent-(storaged|catalogd|ingestd|queryd|embedd|vectord|pathwayd|observerd|matrixd|gateway)$" 2>/dev/null || true
sleep 0.5

mkdir -p /tmp/gostack-logs

start() {
  local bin="$1"
  local port="$2"
  local log="/tmp/gostack-logs/persistent-$bin.log"
  nohup ./bin/persistent-"$bin" -config "$TEMP_TOML" > "$log" 2>&1 & disown
  for _ in $(seq 1 50); do
    if curl -sSf -m 1 "http://127.0.0.1:$port/health" >/dev/null 2>&1; then
      echo "  persistent-$bin :$port up (log: $log)"
      return 0
    fi
    sleep 0.1
  done
  echo "  persistent-$bin :$port FAILED — log tail:"
  tail -20 "$log"
  return 1
}

echo "[gostack] starting in dependency order (port range :4xxx)"
start storaged  4211
start catalogd  4212
start ingestd   4213
start queryd    4214
start embedd    4216
start vectord   4215
start pathwayd  4217
start observerd 4219
start matrixd   4218
start gateway   4110

# chatd is started independently — its provider key files come from
# /etc/lakehouse/{ollama_cloud,openrouter,opencode,kimi}.env; if
# chatd is already up (long-running from a prior session) we don't
# touch it. chatd uses no S3, so no temp-toml override needed.
if ! curl -sSf -m 1 http://127.0.0.1:3220/health >/dev/null 2>&1; then
  echo "[gostack] chatd :3220 not up; starting"
  nohup ./bin/chatd -config lakehouse.toml > /tmp/gostack-logs/chatd.log 2>&1 & disown
  for _ in $(seq 1 50); do
    if curl -sSf -m 1 "http://127.0.0.1:3220/health" >/dev/null 2>&1; then
      echo "  chatd :3220 up"
      break
    fi
    sleep 0.1
  done
else
  echo "  chatd :3220 already up (skipping)"
fi

echo
echo "[gostack] ready · sweep:"
for p in 4110 4211 4212 4213 4214 4215 4216 4217 4218 4219 3220; do
  curl -sSf -m 1 "http://127.0.0.1:$p/health" 2>/dev/null | head -c 80
  echo
done
echo
echo "[gostack] persistent stack: ports :4110+:4211-:4219 · bucket=$PERSISTENT_BUCKET"
echo "[gostack] smoke harnesses:  ports :3110+:3211-:3219 · bucket=lakehouse-go-primary"
echo "[gostack] shared:           chatd at :3220 (read-mostly LLM dispatch)"
echo "[gostack] tear down via: pkill -f 'bin/persistent-'"