#!/bin/bash
###############################################################################
# Download GRDR-TVR Dataset from Hugging Face Hub
#
# This script provides a simple way to download the GRDR-TVR dataset
# components using the Hugging Face CLI.
#
# Usage:
#   ./download_checkpoints.sh [OPTIONS]
#
# Examples:
#   # Download everything
#   ./download_checkpoints.sh --all
#
#   # Download only GRDR checkpoints
#   ./download_checkpoints.sh --grdr
#
#   # Download features for specific dataset
#   ./download_checkpoints.sh --features msrvtt
###############################################################################

REPO_ID="JasonCoderMaker/GRDR-TVR"
OUTPUT_DIR="./GRDR-TVR"

# Colors for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m' # No Color

# Print colored message
print_msg() {
    local color=$1
    shift
    echo -e "${color}$@${NC}"
}

# Check if huggingface-cli is installed
check_hf_cli() {
    if ! command -v huggingface-cli &> /dev/null; then
        print_msg $RED "Error: huggingface-cli not found!"
        print_msg $YELLOW "Please install: pip install huggingface_hub"
        exit 1
    fi
}

# Download all components
download_all() {
    print_msg $BLUE "=================================================="
    print_msg $BLUE "Downloading complete GRDR-TVR dataset..."
    print_msg $BLUE "=================================================="
    
    huggingface-cli download $REPO_ID \
        --repo-type dataset \
        --local-dir $OUTPUT_DIR \
        --local-dir-use-symlinks False
    
    print_msg $GREEN "✓ Complete dataset downloaded to $OUTPUT_DIR"
}

# Download InternVideo2 features
download_features() {
    local dataset=$1
    print_msg $BLUE "=================================================="
    print_msg $BLUE "Downloading InternVideo2 features..."
    print_msg $BLUE "=================================================="
    
    if [ -z "$dataset" ]; then
        # Download all features
        huggingface-cli download $REPO_ID \
            --repo-type dataset \
            --include "InternVideo2/*" \
            --local-dir $OUTPUT_DIR \
            --local-dir-use-symlinks False
    else
        # Download specific dataset features
        huggingface-cli download $REPO_ID \
            --repo-type dataset \
            --include "InternVideo2/${dataset}/*" \
            --local-dir $OUTPUT_DIR \
            --local-dir-use-symlinks False
    fi
    
    print_msg $GREEN "✓ Features downloaded to $OUTPUT_DIR/InternVideo2"
}

# Download GRDR checkpoints
download_grdr() {
    local dataset=$1
    print_msg $BLUE "=================================================="
    print_msg $BLUE "Downloading GRDR checkpoints..."
    print_msg $BLUE "=================================================="
    
    if [ -z "$dataset" ]; then
        # Download all GRDR checkpoints
        huggingface-cli download $REPO_ID \
            --repo-type dataset \
            --include "GRDR/*" \
            --local-dir $OUTPUT_DIR \
            --local-dir-use-symlinks False
    else
        # Download specific dataset checkpoint
        huggingface-cli download $REPO_ID \
            --repo-type dataset \
            --include "GRDR/${dataset}/*" \
            --local-dir $OUTPUT_DIR \
            --local-dir-use-symlinks False
    fi
    
    print_msg $GREEN "✓ GRDR checkpoints downloaded to $OUTPUT_DIR/GRDR"
}

# Download Xpool checkpoints
download_xpool() {
    local dataset=$1
    print_msg $BLUE "=================================================="
    print_msg $BLUE "Downloading Xpool reranker checkpoints..."
    print_msg $BLUE "=================================================="
    
    if [ -z "$dataset" ]; then
        # Download all Xpool checkpoints
        huggingface-cli download $REPO_ID \
            --repo-type dataset \
            --include "Xpool/*" \
            --local-dir $OUTPUT_DIR \
            --local-dir-use-symlinks False
    else
        # Download specific dataset checkpoint
        local filename=""
        case $dataset in
            msrvtt)
                filename="msrvtt9k_model_best.pth"
                ;;
            actnet)
                filename="actnet_model_best.pth"
                ;;
            didemo)
                filename="didemo_model_best.pth"
                ;;
            lsmdc)
                filename="lsmdc_model_best.pth"
                ;;
            *)
                print_msg $RED "Error: Unknown dataset '$dataset'"
                exit 1
                ;;
        esac
        
        huggingface-cli download $REPO_ID \
            --repo-type dataset \
            --include "Xpool/${filename}" \
            --local-dir $OUTPUT_DIR \
            --local-dir-use-symlinks False
    fi
    
    print_msg $GREEN "✓ Xpool checkpoints downloaded to $OUTPUT_DIR/Xpool"
}

# Show usage
show_usage() {
    cat << EOF
Usage: $0 [OPTIONS] [DATASET]

Download GRDR-TVR dataset components from Hugging Face Hub.

OPTIONS:
    --all           Download all components (default if no option specified)
    --features      Download InternVideo2 features only
    --grdr          Download GRDR checkpoints only
    --xpool         Download Xpool reranker checkpoints only
    -o, --output    Specify output directory (default: ./GRDR-TVR)
    -h, --help      Show this help message

DATASET (optional):
    msrvtt          MSR-VTT dataset
    actnet          ActivityNet dataset
    didemo          DiDeMo dataset
    lsmdc           LSMDC dataset
    
    If not specified, downloads all datasets.

EXAMPLES:
    # Download everything
    $0 --all

    # Download only GRDR checkpoints
    $0 --grdr

    # Download InternVideo2 features for MSR-VTT
    $0 --features msrvtt

    # Download Xpool reranker for ActivityNet
    $0 --xpool actnet

    # Download to custom directory
    $0 --all -o ./my_data

EOF
}

# Main script
main() {
    check_hf_cli
    
    # Parse arguments
    local mode="all"
    local dataset=""
    
    while [[ $# -gt 0 ]]; do
        case $1 in
            --all)
                mode="all"
                shift
                ;;
            --features)
                mode="features"
                shift
                ;;
            --grdr)
                mode="grdr"
                shift
                ;;
            --xpool)
                mode="xpool"
                shift
                ;;
            -o|--output)
                OUTPUT_DIR="$2"
                shift 2
                ;;
            -h|--help)
                show_usage
                exit 0
                ;;
            msrvtt|actnet|didemo|lsmdc)
                dataset="$1"
                shift
                ;;
            *)
                print_msg $RED "Error: Unknown option '$1'"
                show_usage
                exit 1
                ;;
        esac
    done
    
    print_msg $BLUE "=================================================="
    print_msg $BLUE "GRDR-TVR Dataset Downloader"
    print_msg $BLUE "=================================================="
    print_msg $YELLOW "Repository: $REPO_ID"
    print_msg $YELLOW "Output: $OUTPUT_DIR"
    if [ -n "$dataset" ]; then
        print_msg $YELLOW "Dataset: $dataset"
    fi
    print_msg $BLUE "==================================================\n"
    
    # Execute download based on mode
    case $mode in
        all)
            download_all
            ;;
        features)
            download_features "$dataset"
            ;;
        grdr)
            download_grdr "$dataset"
            ;;
        xpool)
            download_xpool "$dataset"
            ;;
    esac
    
    print_msg $GREEN "\n=================================================="
    print_msg $GREEN "✓ Download Complete!"
    print_msg $GREEN "=================================================="
    print_msg $YELLOW "\nNext steps:"
    print_msg $YELLOW "1. Verify downloads in $OUTPUT_DIR"
    print_msg $YELLOW "2. See README.md for usage instructions"
    print_msg $YELLOW "3. Visit https://huggingface.co/datasets/$REPO_ID\n"
}

# Run main function
main "$@"