#!/command/with-contenv bash
# shellcheck shell=bash
# Download yolov8 models when DOWNLOAD_YOLOV8=1 environment variable is set

set -o errexit -o nounset -o pipefail

MODEL_CACHE_DIR=${MODEL_CACHE_DIR:-"/config/model_cache"}
DOWNLOAD_YOLOV8=${DOWNLOAD_YOLOV8:-"0"}
YOLOV8_DIR="$MODEL_CACHE_DIR/yolov8"
YOLOV8_URL=https://github.com/harakas/models/releases/download/yolov8.1-1.1/yolov8.small.models.tar.gz
YOLOV8_DIGEST=304186b299560fbacc28eac9b9ea02cc2289fe30eb2c0df30109a2529423695c

if [ "$DOWNLOAD_YOLOV8" = "1" ]; then
  echo "download-models: DOWNLOAD_YOLOV8=${DOWNLOAD_YOLOV8}, running download"
  if ! test -f "${YOLOV8_DIR}/model.fetched"; then
    mkdir -p $YOLOV8_DIR
    TMP_FILE="${YOLOV8_DIR}/download.tar.gz"
    curl --no-progress-meter -L --max-filesize 500M --insecure --output $TMP_FILE "${YOLOV8_URL}"
    digest=$(sha256sum $TMP_FILE | awk '{print $1}')
    if [ "$digest" = "$YOLOV8_DIGEST" ]; then
      echo "download-models: Extracting downloaded file"
      cd $YOLOV8_DIR
      tar zxf $TMP_FILE
      rm $TMP_FILE
      touch model.fetched
      echo "download-models: Yolov8 download done, files placed into ${YOLOV8_DIR}"
    else
      echo "download-models: Downloaded file digest does not match: got $digest, expected $YOLOV8_DIGEST"
      rm $TMP_FILE
    fi
  else
    echo "download-models: ${YOLOV8_DIR}/model.fetched already present"
  fi
fi