#!/usr/bin/env bash
set -uo pipefail
# Queue ALL fully-transferred pi0 ckpts through the proven 36-cell grid eval
# (run_pi0_one_ckpt.sh + pi0_grid_eval.py, cpu-sim, 3 seeds 40/41/42, avg).
# ONE model per GPU; when 8 GPUs busy, the rest wait. Re-scans transfer state
# so newly-finished ckpts get queued too. Skips ckpts already done (SUMMARY).
ROOT=/workspace/groot_eval
HARNESS="${ROOT}/harness"
RES="${ROOT}/results_pi0_pairwise"
LOG="${ROOT}/logs/pi0_pairwise"
CK=/workspace/pi0_ckpt
GPUS=(0 1 2 3 4 5 6 7)
mkdir -p "${RES}" "${LOG}"
log(){ echo "[$(date +%H:%M:%S)] $*" >> "${LOG}/queue.log"; }

complete(){ s="$1/17999"; [[ -f "$s/model.safetensors" && -f "$s/metadata.pt" ]] || return 1
  ls "$s"/assets/*/norm_stats.json >/dev/null 2>&1 || return 1
  mb=$(du -m "$s/model.safetensors" 2>/dev/null|cut -f1); [[ "${mb:-0}" -ge 3000 ]] || return 1
  [[ $(( $(date +%s) - $(stat -c %Y "$s/model.safetensors" 2>/dev/null||echo 0) )) -ge 90 ]]; }
free_gpu(){ for g in "${GPUS[@]}"; do tmux has-session -t "pi0_g${g}" 2>/dev/null || { echo "$g"; return; }; done; echo ""; }

log "queue start"
while true; do
  pending=0
  for d in "${CK}"/*/; do
    n=$(basename "$d"); case "$n" in ckpt_batch*|ckpt_may_*) continue;; esac
    [[ -f "${RES}/${n}/SUMMARY.txt" ]] && continue
    complete "$d" || continue
    pending=$((pending+1))
    tmux has-session -t "__claim_${n}" 2>/dev/null && continue   # already dispatched
    g="$(free_gpu)"; [[ -z "$g" ]] && { log "all GPUs busy; ${n} waits"; break; }
    p=$((8400+g))
    log "DISPATCH ${n} → GPU${g} (pi0_g${g})"
    tmux new-session -d -s "__claim_${n}" "sleep 999999"          # claim marker
    tmux new-session -d -s "pi0_g${g}" \
      "cd ${HARNESS} && bash run_pi0_one_ckpt.sh '${n}' ${g} ${p} > ${LOG}/q_${n}.log 2>&1; \
       tmux kill-session -t __claim_${n} 2>/dev/null"
  done
  # done when nothing pending and no pi0_g* running
  run=$(tmux ls 2>/dev/null | grep -c '^pi0_g[0-7]:' || true)
  if [[ "${pending}" -eq 0 && "${run}" -eq 0 ]]; then log "ALL DONE"; break; fi
  sleep 90
done