#!/usr/bin/env bash
set -Eeuo pipefail

PYTHON=${PYTHON:-/root/.miniconda3/envs/sglang/bin/python}
SGLANG_BIN=${SGLANG_BIN:-/root/.miniconda3/envs/sglang/bin/sglang}
FFPROBE=${FFPROBE:-/root/.miniconda3/envs/sglang/bin/ffprobe}
MODEL=${MODEL:-/data/hf_models/MiniMax-H3}
CLIENT_SCRIPT=${CLIENT_SCRIPT:-/data/wxy/sskj-h3/throughput/sglang-base/scripts/minimax_h3_v2v_bench.py}
REFERENCE_VIDEO=${REFERENCE_VIDEO:-/data/wxy/sskj-h3/throughput/sglang-base/inputs/ref2va-video/reference_2s_1344x768.mp4}
BASE_PORT=${BASE_PORT:-38110}
MASTER_PORT_BASE=${MASTER_PORT_BASE:-39110}
SCHEDULER_PORT_BASE=${SCHEDULER_PORT_BASE:-40110}
RUN_ID=${RUN_ID:-ref2va-video-base-tp2x4-768p-5s-20steps-$(date '+%Y%m%d-%H%M%S')}
RESULT_ROOT=${RESULT_ROOT:-/data/wxy/sskj-h3/throughput/sglang-base/results/$RUN_ID}
SERVER_START_TIMEOUT=${SERVER_START_TIMEOUT:-1800}
PROMPT='Follow the motion and appearance of <Video 1>, preserving coherent timing while continuing the scene naturally with synchronized ambient sound.'

declare -a SERVER_PIDS=()
declare -a CLIENT_PIDS=()
log() { printf '[%s] %s\n' "$(date '+%F %T')" "$*"; }
die() { log "ERROR: $*" >&2; exit 1; }

port_is_open() {
  "$PYTHON" - "$1" <<'PY'
import socket, sys
s = socket.socket(); s.settimeout(0.5)
try: s.connect(("127.0.0.1", int(sys.argv[1])))
except OSError: raise SystemExit(1)
else: raise SystemExit(0)
finally: s.close()
PY
}

stop_servers() {
  local pid alive deadline
  ((${#SERVER_PIDS[@]})) || return 0
  log "stopping ${#SERVER_PIDS[@]} server(s)"
  for pid in "${SERVER_PIDS[@]}"; do kill -INT "$pid" 2>/dev/null || true; done
  deadline=$((SECONDS + 120))
  while ((SECONDS < deadline)); do
    alive=0
    for pid in "${SERVER_PIDS[@]}"; do kill -0 "$pid" 2>/dev/null && alive=1; done
    ((alive == 0)) && break
    sleep 2
  done
  for pid in "${SERVER_PIDS[@]}"; do
    if kill -0 "$pid" 2>/dev/null; then
      kill -TERM -- "-$pid" 2>/dev/null || kill -TERM "$pid" 2>/dev/null || true
      sleep 3
      kill -KILL -- "-$pid" 2>/dev/null || kill -KILL "$pid" 2>/dev/null || true
    fi
    wait "$pid" 2>/dev/null || true
  done
  SERVER_PIDS=()
}

cleanup() {
  local rc=$? pid
  trap - EXIT INT TERM
  for pid in "${CLIENT_PIDS[@]}"; do kill -TERM "$pid" 2>/dev/null || true; done
  stop_servers
  exit "$rc"
}
trap cleanup EXIT INT TERM

wait_healthy() {
  local port=$1 pid=$2 server_log=$3 deadline=$((SECONDS + SERVER_START_TIMEOUT))
  while ((SECONDS < deadline)); do
    curl -fsS --max-time 5 "http://127.0.0.1:${port}/health" >/dev/null 2>&1 && return 0
    if ! kill -0 "$pid" 2>/dev/null; then tail -100 "$server_log" >&2 || true; return 1; fi
    sleep 5
  done
  tail -100 "$server_log" >&2 || true
  return 1
}

[[ -x "$PYTHON" ]] || die "missing python: $PYTHON"
[[ -x "$SGLANG_BIN" ]] || die "missing sglang: $SGLANG_BIN"
[[ -f "$CLIENT_SCRIPT" ]] || die "missing client: $CLIENT_SCRIPT"
[[ -f "$REFERENCE_VIDEO" ]] || die "missing reference video: $REFERENCE_VIDEO"
mkdir -p "$RESULT_ROOT"
cat >"$RESULT_ROOT/run_config.env" <<EOF
method=base
task=ref2va
reference_kind=video
reference_video=$REFERENCE_VIDEO
tp_size=2
replicas=4
total_requests=4
num_inference_steps=20
short_edge=768
duration_seconds=5
aspect_ratio=16:9
model=$MODEL
EOF
"$FFPROBE" -v error -show_streams -show_format -of json "$REFERENCE_VIDEO" >"$RESULT_ROOT/reference_video_ffprobe.json"
sha256sum "$REFERENCE_VIDEO" >"$RESULT_ROOT/reference_video_sha256.txt"
"$PYTHON" -m pip show sglang >"$RESULT_ROOT/sglang_pip_show.txt"
"$PYTHON" -m pip freeze >"$RESULT_ROOT/pip_freeze.txt"
sha256sum "$CLIENT_SCRIPT" "$0" >"$RESULT_ROOT/source_sha256.txt"
nvidia-smi >"$RESULT_ROOT/nvidia_smi_before.txt"

for replica in 0 1 2 3; do
  port=$((BASE_PORT + replica * 10)); master_port=$((MASTER_PORT_BASE + replica * 10)); scheduler_port=$((SCHEDULER_PORT_BASE + replica * 10))
  for candidate in "$port" "$((port + 1))" "$master_port" "$scheduler_port"; do port_is_open "$candidate" && die "port already in use: $candidate"; done
  first_gpu=$((replica * 2)); gpu_csv="$first_gpu,$((first_gpu + 1))"
  server_dir="$RESULT_ROOT/server_${replica}_port${port}"; mkdir -p "$server_dir/outputs"
  printf '%s\n' "$gpu_csv" >"$server_dir/cuda_visible_devices.txt"
  log "starting Ref2VA replica=$replica GPUs=$gpu_csv port=$port"
  env -u SGLANG_CACHE_DIT_ENABLED -u SGLANG_CACHE_DIT_FN -u SGLANG_CACHE_DIT_BN \
    -u SGLANG_CACHE_DIT_RDT -u SGLANG_CACHE_DIT_MC -u SGLANG_CACHE_DIT_WARMUP \
    -u SGLANG_CACHE_DIT_TAYLORSEER -u SGLANG_CACHE_DIT_SCM_PRESET \
    -u SGLANG_CACHE_DIT_SCM_POLICY CUDA_VISIBLE_DEVICES="$gpu_csv" \
    PATH="/root/.miniconda3/envs/sglang/bin:$PATH" PYTHONUNBUFFERED=1 \
    TOKENIZERS_PARALLELISM=false SGLANG_USE_RUNAI_MODEL_STREAMER=false \
    setsid "$SGLANG_BIN" serve --model-path "$MODEL" --model-variant Ref2VA \
    --backend sglang --performance-mode speed --num-gpus 2 --tp-size 2 \
    --ulysses-degree 1 --use-fsdp-inference false --enable-torch-compile false \
    --batching-max-size 1 --batching-delay-ms 0 --host 0.0.0.0 --port "$port" \
    --master-port "$master_port" --scheduler-port "$scheduler_port" \
    --output-path "$server_dir/outputs" >"$server_dir/server.log" 2>&1 &
  SERVER_PIDS+=("$!")
done
for replica in 0 1 2 3; do
  port=$((BASE_PORT + replica * 10)); log "waiting for replica=$replica port=$port"
  wait_healthy "$port" "${SERVER_PIDS[$replica]}" "$RESULT_ROOT/server_${replica}_port${port}/server.log" || die "replica=$replica failed startup"
  log "replica=$replica healthy"
done
for replica in 0 1 2 3; do
  port=$((BASE_PORT + replica * 10)); client_dir="$RESULT_ROOT/client_${replica}_port${port}"; mkdir -p "$client_dir"
  "$PYTHON" "$CLIENT_SCRIPT" run --host 127.0.0.1 --port "$port" --model "$MODEL" \
    --replica-index "$replica" --reference-video "$REFERENCE_VIDEO" --prompt "$PROMPT" \
    --num-inference-steps 20 --short-edge 768 --duration-seconds 5 --aspect-ratio 16:9 \
    --flow-shift 12.0 --audio-flow-shift 3.0 --seed 1101 --output "$client_dir/result.json" \
    >"$client_dir/client.log" 2>&1 &
  CLIENT_PIDS+=("$!"); log "started video-reference client replica=$replica port=$port"
done
failed=0
for replica in 0 1 2 3; do wait "${CLIENT_PIDS[$replica]}" || failed=1; done
CLIENT_PIDS=()
"$PYTHON" "$CLIENT_SCRIPT" summarize --input-dir "$RESULT_ROOT" --output "$RESULT_ROOT/summary.json" >"$RESULT_ROOT/summary.log" || failed=1
nvidia-smi >"$RESULT_ROOT/nvidia_smi_after.txt"
stop_servers
((failed == 0)) || die "video-reference benchmark had failed requests"
log "video-reference benchmark complete: $RESULT_ROOT"
trap - EXIT INT TERM