#!/usr/bin/env bash
# 用临时 Hugging Face token 分目录并行上传，不修改系统已登录账号。
#
# 用法:
#   HF_TOKEN="hf_xxxx" REPO_ID="username/repo-name" ./upload_to_hf.sh
#
# 可选环境变量:
#   REPO_TYPE    model | dataset | space     (默认 dataset)
#   PRIVATE      1=私有  0=公开              (默认 1)
#   SRC_DIR      本地源目录                    (默认脚本所在目录)
#   PARALLEL     同时上传的顶层项数量          (默认 3)
#   NUM_WORKERS  每个大目录内部的 worker 数    (默认 4)
#   LOG_DIR      日志与暂存目录                (默认 $SRC_DIR/.hf_upload_logs)
#   RETRY        失败重试次数                  (默认 5)

set -euo pipefail

: "${HF_TOKEN:?请设置 HF_TOKEN，例如: HF_TOKEN=hf_xxxx ./upload_to_hf.sh}"
: "${REPO_ID:?请设置 REPO_ID，例如: REPO_ID=username/my-backup ./upload_to_hf.sh}"

REPO_TYPE="${REPO_TYPE:-dataset}"
PRIVATE="${PRIVATE:-1}"
SRC_DIR="${SRC_DIR:-$(cd "$(dirname "$0")" && pwd)}"
PARALLEL="${PARALLEL:-3}"
NUM_WORKERS="${NUM_WORKERS:-4}"
LOG_DIR="${LOG_DIR:-$SRC_DIR/.hf_upload_logs}"
RETRY="${RETRY:-5}"

PRIVATE_FLAG="--private"
[[ "$PRIVATE" == "0" ]] && PRIVATE_FLAG="--no-private"

mkdir -p "$LOG_DIR/staging"

HF_ARGS=(--repo-type="$REPO_TYPE" $PRIVATE_FLAG --token "$HF_TOKEN")

retry_cmd() {
  local attempt=1
  local delay=30
  while true; do
    if "$@"; then
      return 0
    fi
    if (( attempt >= RETRY )); then
      return 1
    fi
    echo "  失败，${delay}s 后重试 (${attempt}/${RETRY})..."
    sleep "$delay"
    attempt=$((attempt + 1))
    delay=$((delay + 30))
  done
}

upload_item() {
  local name="$1"
  local local_path="$SRC_DIR/$name"
  local log="$LOG_DIR/${name}.log"

  {
    echo "========================================"
    echo "[$(date '+%F %T')] 开始: $name"
    echo "本地路径: $local_path"

    if [[ -f "$local_path" ]]; then
      retry_cmd hf upload "$REPO_ID" "$local_path" "$name" \
        "${HF_ARGS[@]}" \
        --commit-message "Upload $name"

    elif [[ -d "$local_path" ]]; then
      # upload-large-folder 不支持 path_in_repo，用 symlink 暂存保留目录名
      local staging="$LOG_DIR/staging/$name"
      rm -rf "$staging"
      mkdir -p "$staging"
      ln -sfn "$local_path" "$staging/$name"

      retry_cmd hf upload-large-folder "$REPO_ID" "$staging" \
        "${HF_ARGS[@]}" \
        --num-workers="$NUM_WORKERS"
    else
      echo "跳过（不存在）: $local_path"
    fi

    echo "[$(date '+%F %T')] 完成: $name"
  } >>"$log" 2>&1
}

echo "源目录:    $SRC_DIR"
echo "目标仓库:  $REPO_ID (type=$REPO_TYPE)"
echo "并行数:    $PARALLEL"
echo "日志目录:  $LOG_DIR"
echo "使用临时 token，不会修改系统 Hugging Face 登录状态"
echo ""

# 预创建仓库（仅首次）
hf repo create "$REPO_ID" --repo-type="$REPO_TYPE" $PRIVATE_FLAG \
  --token "$HF_TOKEN" --exist-ok >/dev/null 2>&1 || true

items=()
for item in "$SRC_DIR"/*; do
  [[ -e "$item" ]] || continue
  name="$(basename "$item")"
  [[ "$name" == ".hf_upload_logs" ]] && continue
  items+=("$name")
done

echo "共 ${#items[@]} 个顶层项待上传: ${items[*]}"
echo "查看进度: tail -f $LOG_DIR/<名称>.log"
echo ""

running=0
failed=0
for name in "${items[@]}"; do
  while (( running >= PARALLEL )); do
    if wait -n 2>/dev/null; then
      running=$((running - 1))
    else
      # bash < 4.3 无 wait -n
      sleep 3
      running=$(jobs -r | wc -l)
    fi
  done

  upload_item "$name" &
  running=$((running + 1))
  echo "已启动: $name  (日志: $LOG_DIR/${name}.log)"
done

while (( running > 0 )); do
  if wait -n 2>/dev/null; then
    running=$((running - 1))
  else
    wait
    running=0
  fi
done

echo ""
echo "========== 上传结果 =========="
for name in "${items[@]}"; do
  log="$LOG_DIR/${name}.log"
  if [[ -f "$log" ]] && tail -1 "$log" | grep -q "完成: $name"; then
    echo "  OK   $name"
  else
    echo "  FAIL $name  (查看 $log)"
    failed=$((failed + 1))
  fi
done

if (( failed > 0 )); then
  echo ""
  echo "${failed} 项上传失败，可重新运行本脚本（大目录支持断点续传）"
  exit 1
fi

echo ""
echo "全部完成: https://huggingface.co/$REPO_ID"