#!/usr/bin/env bash
# Full v2 pipeline. Resumable, retrying, and safe to run unattended.
#
#   cd /scratch/user4/dai/v2
#   (setsid nohup bash scripts/run_all.sh > work/logs/run_all.log 2>&1 < /dev/null &)
#
#   tail -f work/logs/run_all.log
#   cat work/logs/status                 <- one line per step
#
# DESIGN
#   * Every step declares an output. If the output exists the step is skipped, so a restart
#     after a crash costs only the step that was running.
#   * Every step retries twice. The shared box kills jobs under memory pressure and a retry
#     from a checkpoint is cheaper than a human noticing.
#   * TRACK 1 (CPU) and TRACK 2 (GPU) are independent and run concurrently. Track 1 alone
#     produces a shippable submission; Track 2 only adds candidates to it.
#   * Everything is niced. 26 users share this box and an earlier job at load 37 made SSH
#     unreachable for all of them.
set -uo pipefail

cd "$(dirname "$0")/.."
ROOT=$(pwd)
export BERX_DATA="${BERX_DATA:-/scratch/user4/dai/dataset_unstop/dataset}"
export BERX_WORK="${BERX_WORK:-$ROOT/work}"
export BERX_EMB="${BERX_EMB:-/scratch/user4/dai/model-3/work/emb}"
export BERX_M4="${BERX_M4:-/scratch/user4/dai/model-4/work}"
export HF_HOME="${HF_HOME:-/scratch/user4/mtp/cache/huggingface}"
export TOKENIZERS_PARALLELISM=false
export OMP_NUM_THREADS="${OMP_NUM_THREADS:-8}"
export MKL_NUM_THREADS="${MKL_NUM_THREADS:-8}"
PYBIN="${PYBIN:-/home/user4/Jyo/DAI/er_pipeline/.venv/bin/python}"
# -u is not optional here. Python block-buffers stdout when it is a file, so a stage that
# redirects to a log shows NOTHING until it exits - t1_fit.log sat at 0 bytes for twelve
# minutes while the fit was running normally. Unbuffered output is the difference between
# a monitorable pipeline and a black box.
PY="$PYBIN -u"
N="nice -n 19 ionice -c3"
SPLIT="${SPLIT:-test}"
L="$BERX_WORK/logs"; mkdir -p "$L"
STATUS="$L/status"
CE_MODEL="${CE_MODEL:-/scratch/user4/dai/model-3/work/ce_model_A}"

# Unbuffered and duplicated into the track log. The first version piped each track through
# `sed` via process substitution to prefix lines; sed block-buffers when its output is a
# file, so after two minutes of real work the log still held only the banner. Never put a
# filter between a long-running job and its log.
say() { echo "[$(date +%H:%M:%S)] $*" | tee -a "${TRACKLOG:-/dev/null}"; }
mark() { printf '%-28s %-9s %s\n' "$1" "$2" "$(date +%H:%M:%S)" >> "$STATUS"; }

# step <name> <output-to-check> <logfile> <command...>
step() {
  local name="$1" out="$2" log="$3"; shift 3
  if [ -n "$out" ] && [ -e "$out" ]; then say "SKIP $name (exists: $out)"; mark "$name" SKIP; return 0; fi
  local try rc
  for try in 1 2 3; do
    say "RUN  $name (attempt $try)"
    # rc must be captured from the command itself. Reading $? after an `if` returns the
    # status of the `if`, which is 0 whenever the else branch is taken - so every failure
    # reported "rc=0" and the gate check below could never fire.
    $N "$@" >> "$L/$log" 2>&1
    rc=$?
    if [ $rc -eq 0 ]; then say "OK   $name"; mark "$name" OK; return 0; fi
    # exit 3 is a deliberate gate failure, not a crash. Retrying it is pointless.
    if [ $rc -eq 3 ]; then say "GATE $name returned 3 (declined)"; mark "$name" GATE; return 3; fi
    say "FAIL $name rc=$rc (see $L/$log)"; sleep 20
  done
  mark "$name" FAILED; return 1
}

"$PYBIN" -c 'import pandas, torch' 2>/dev/null || { echo "PYBIN=$PYBIN unusable"; exit 1; }
# Append, never truncate. Restarting one track used to wipe the other track's history from
# the status file while it was still running, which is the opposite of what a status file is
# for. A session banner keeps the restarts readable instead.
printf '# ---- session %s TRACKS=%s
' "$(date '+%H:%M:%S')" "${TRACKS:-12}" >> "$STATUS"
say "v2 pipeline starting. work=$BERX_WORK"

# ---------------------------------------------------------------- TRACK 1 (CPU, shippable)
track1() {
  step prep_train  "$BERX_WORK/prep/train/pool.parquet"  t1_prep.log \
       $PY scripts/00_prepare.py --split train || return 1
  step prep_test   "$BERX_WORK/prep/test/pool.parquet"   t1_prep.log \
       $PY scripts/00_prepare.py --split test  || return 1
  step m4_tables   "$BERX_WORK/m4/test.parquet"          t1_m4.log \
       $PY scripts/10_build_m4_table.py --split both || return 1
  step geo_test    "$BERX_WORK/geo/equiv_test.json"      t1_geo.log \
       $PY scripts/02_france_geo.py --split test --skip-validate || return 1
  step geo_train   "$BERX_WORK/geo/equiv_train.json"     t1_geo.log \
       $PY scripts/02_france_geo.py --split train --skip-validate || return 1

  # GATE A. Fits on g_stack, reads g_val - a split the cross-encoder never saw.
  step rescore_fit "$BERX_WORK/rescore/gate.json"        t1_fit.log \
       $PY scripts/11_rescore.py --mode train
  local rc=$?
  if [ $rc -eq 3 ]; then
    say "GATE A declined: the new features do not beat model-4's own columns on a clean val."
    say "Keeping the existing submission. Track 2 continues - it adds candidates, not features."
    return 3
  fi
  [ $rc -ne 0 ] && return 1

  step rescore_apply "$BERX_WORK/output_v2/matching_results.tsv" t1_apply.log \
       $PY scripts/11_rescore.py --mode test --bundle "$BERX_WORK/rescore/bundle.joblib" || return 1
  say "TRACK 1 COMPLETE - $BERX_WORK/output_v2/matching_results.tsv is shippable."
}

# ---------------------------------------------------------------- TRACK 2 (GPU, candidates)
track2() {
  # F4/F5 from FALSE_NEGATIVES: 78% of never-retrieved copies are outside every retriever's
  # top-100, because all three score name AND address together and these copies have one of
  # the two destroyed. A single-field channel is the only thing that can reach them.
  step embed_name_s1   "$BERX_EMB/nameonly/${SPLIT}_s1/matrix.npy"   t2_embed.log \
       env CUDA_VISIBLE_DEVICES=0 $PY scripts/08_embed.py --split "$SPLIT" \
           --view name --side s1   --out-channel nameonly || return 1
  step embed_name_pool "$BERX_EMB/nameonly/${SPLIT}_pool/matrix.npy" t2_embed.log \
       env CUDA_VISIBLE_DEVICES=0 $PY scripts/08_embed.py --split "$SPLIT" \
           --view name --side pool --out-channel nameonly --only-empty-address || return 1
  step retr_F4         "$BERX_WORK/retr/${SPLIT}_nameonly_s0of1.parquet" t2_retr.log \
       env CUDA_VISIBLE_DEVICES=0 $PY scripts/03_retrieve.py --split "$SPLIT" \
           --channel nameonly --k 20 --device cuda:0 || return 1

  # Fix 2, by the recipe that was actually measured: character TF-IDF over the address-less
  # pool, top 5. CPU only, so it runs beside the GPU work instead of competing for it.
  step ename           "$BERX_WORK/retr/${SPLIT}_ename_s0of1.parquet" t2_ename.log        $PY scripts/13_ename.py --split "$SPLIT" --k 5 || return 1

  # Address-only retrieval is NOT here on purpose. Measured at 6-12% recovery of missed
  # copies, worth about +0.0002 val for 10-50 extra candidates per S1, and rejected on that
  # evidence. A GPU pass for it was killed mid-run once the measurement was available.

  step retr_e5small    "$BERX_WORK/retr/${SPLIT}_e5_small_s0of1.parquet" t2_retr.log \
       env CUDA_VISIBLE_DEVICES=0 $PY scripts/03_retrieve.py --split "$SPLIT" \
           --channel e5_small --k 100 --device cuda:0 || return 1

  step new_pairs       "$BERX_WORK/shards/${SPLIT}_manifest.json" t2_shard.log \
       $PY scripts/12_new_pairs.py --split "$SPLIT" --nshards 4 || return 1
  say "TRACK 2: shards ready. Upload them, then start the Colab lanes."
}

# TRACKS lets one track be restarted without relaunching the other on top of a live run.
# Track 2 died on a bug while track 1 was still working; starting the whole script again
# would have given track 1 a second concurrent copy of itself.
TRACKS="${TRACKS:-12}"
R1=0; R2=0; T1=""; T2=""
# A pidfile per track. The watchdog needs to tell "track 1 is dead" from "track 2 is alive",
# and counting run_all.sh processes cannot: with either track running the count is the same.
# That is precisely the blindness that let a dead track sit unnoticed.
case "$TRACKS" in *1*) ( TRACKLOG="$L/track1.log"; track1 ) > "$L/track1.out" 2>&1 & T1=$!; echo $T1 > "$L/track1.pid";; esac
case "$TRACKS" in *2*) ( TRACKLOG="$L/track2.log"; track2 ) > "$L/track2.out" 2>&1 & T2=$!; echo $T2 > "$L/track2.pid";; esac
say "TRACKS=$TRACKS  track1 pid=${T1:-skipped}  track2 pid=${T2:-skipped}"
[ -n "$T1" ] && { wait $T1; R1=$?; rm -f "$L/track1.pid"; }
[ -n "$T2" ] && { wait $T2; R2=$?; rm -f "$L/track2.pid"; }
say "track1 rc=$R1  track2 rc=$R2"
say "status:"; cat "$STATUS"