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

if [[ $# -ne 2 ]]; then
  echo "Usage: $0 INPUT_PDF_DIR OUTPUT_DIR" >&2
  exit 2
fi

input_dir=$(realpath "$1")
output_dir=$(realpath -m "$2")
env_dir=/data/chenxing/code/docs/tools/.envs/mineru
cache_dir=/data/chenxing/code/docs/tools/model_cache

mkdir -p "$output_dir" "$output_dir/logs"
work_dir=$(mktemp -d "$output_dir/.shards.XXXXXXXX")
trap 'rm -rf -- "$work_dir"' EXIT

mapfile -d '' pdfs < <(find "$input_dir" -maxdepth 1 -type f -iname '*.pdf' -print0 | sort -z)
if [[ ${#pdfs[@]} -eq 0 ]]; then
  echo "No PDFs found in $input_dir" >&2
  exit 1
fi

for gpu in {0..7}; do
  mkdir -p "$work_dir/$gpu"
done

for i in "${!pdfs[@]}"; do
  gpu=$((i % 8))
  ln -s "${pdfs[$i]}" "$work_dir/$gpu/$(basename "${pdfs[$i]}")"
done

pids=()
for gpu in {0..7}; do
  if find "$work_dir/$gpu" -type l -print -quit | grep -q .; then
    env CUDA_VISIBLE_DEVICES="$gpu" \
      HF_HOME="$cache_dir" \
      MODELSCOPE_CACHE="$cache_dir/modelscope" \
      "$env_dir/bin/mineru" \
        -p "$work_dir/$gpu" \
        -o "$output_dir" \
        -b hybrid-engine \
        --effort high \
        --image-analysis true \
        --formula true \
        --table true \
        >"$output_dir/logs/gpu-$gpu.log" 2>&1 &
    pids+=("$!")
  fi
done

status=0
for pid in "${pids[@]}"; do
  if ! wait "$pid"; then
    status=1
  fi
done

if [[ $status -ne 0 ]]; then
  echo "At least one shard failed; inspect $output_dir/logs/gpu-*.log" >&2
  exit "$status"
fi

echo "Converted ${#pdfs[@]} PDFs into $output_dir"