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

REPO_ID="JasonCoderMaker/GRDR-TVR"
OUTPUT_DIR="${OUTPUT_DIR:-./GRDR-TVR}"
DATASET="${2:-}"

usage() {
    cat <<'EOF'
Usage: ./download_checkpoints.sh [--all|--features|--grdr|--xpool] [dataset]

Datasets: msrvtt, actnet, didemo, panda, lsmdc
Examples:
  ./download_checkpoints.sh --grdr msrvtt
  ./download_checkpoints.sh --grdr panda
  ./download_checkpoints.sh --xpool panda
EOF
}

hf_download() {
    hf download "$REPO_ID" --type dataset --include "$1" --local-dir "$OUTPUT_DIR"
}

download_xpool_dataset() {
    case "$1" in
        msrvtt) hf_download "Xpool/msrvtt9k_model_best.pth" ;;
        actnet) hf_download "Xpool/actnet_model_best.pth" ;;
        didemo) hf_download "Xpool/didemo_model_best.pth" ;;
        panda) hf_download "Xpool/panda_2150k_s42_model_best.pth" ;;
        lsmdc) hf_download "Xpool/lsmdc_model_best.pth" ;;
        *) echo "Unknown dataset: $1" >&2; exit 1 ;;
    esac
}

cmd="${1:---all}"
case "$cmd" in
    --all)
        if [[ -n "$DATASET" ]]; then
            hf_download "GRDR/${DATASET}/best_model/*"
            hf_download "InternVideo2/${DATASET}/**"
            download_xpool_dataset "$DATASET"
        else
            hf_download "GRDR/*/best_model/*"
            hf_download "InternVideo2/**"
            hf_download "Xpool/*"
        fi
        ;;
    --features)
        [[ -n "$DATASET" ]] && hf_download "InternVideo2/${DATASET}/**" || hf_download "InternVideo2/**"
        ;;
    --grdr)
        [[ -n "$DATASET" ]] && hf_download "GRDR/${DATASET}/best_model/*" || hf_download "GRDR/*/best_model/*"
        ;;
    --xpool)
        if [[ -z "$DATASET" ]]; then
            hf_download "Xpool/*"
        else
            download_xpool_dataset "$DATASET"
        fi
        ;;
    -h|--help)
        usage
        ;;
    *)
        usage >&2
        exit 1
        ;;
esac