#!/bin/bash
set -e

MODELS_DIR="${MODELS_DIR:-/app/models}"
MODEL_BASE_URL="${MODEL_BASE_URL:-}"

# Model directories to check/download
PARAKEET_DIR="parakeet-tdt-0.6b-v3"
EOU_DIR="realtime_eou_120m-v1-onnx"
DIARIZATION_DIR="diarization"

download_model() {
    local name=$1
    local url=$2
    local dest="$MODELS_DIR/$name"

    if [ -d "$dest" ] && [ "$(ls -A $dest 2>/dev/null)" ]; then
        echo "Model $name already exists, skipping..."
        return 0
    fi

    echo "Downloading $name..."
    mkdir -p "$dest"

    # Download and extract tar.gz
    curl -L "$url" | tar -xz -C "$dest" --strip-components=1

    echo "Downloaded $name successfully"
}

# Check if models exist
check_models_exist() {
    [ -d "$MODELS_DIR/$PARAKEET_DIR" ] && \
    [ -d "$MODELS_DIR/$EOU_DIR" ] && \
    [ -f "$MODELS_DIR/$DIARIZATION_DIR/diar_streaming_sortformer_4spk-v2.onnx" ]
}

if check_models_exist; then
    echo "All models present"
else
    if [ -z "$MODEL_BASE_URL" ]; then
        echo "ERROR: Models not found and MODEL_BASE_URL not set"
        echo "Please set MODEL_BASE_URL to the base URL containing model archives:"
        echo "  - \${MODEL_BASE_URL}/parakeet-tdt-0.6b-v3.tar.gz"
        echo "  - \${MODEL_BASE_URL}/realtime_eou_120m-v1-onnx.tar.gz"
        echo "  - \${MODEL_BASE_URL}/diarization.tar.gz"
        exit 1
    fi

    mkdir -p "$MODELS_DIR"

    download_model "$PARAKEET_DIR" "${MODEL_BASE_URL}/parakeet-tdt-0.6b-v3.tar.gz"
    download_model "$EOU_DIR" "${MODEL_BASE_URL}/realtime_eou_120m-v1-onnx.tar.gz"
    download_model "$DIARIZATION_DIR" "${MODEL_BASE_URL}/diarization.tar.gz"

    echo "All models downloaded successfully"
fi

# Execute the main command
exec "$@"