#!/bin/bash
# Exit if the variable tests fail
set -e
set -o pipefail
 
if [[ -n "$CERC_SCRIPT_DEBUG" ]]; then
    env
    set -x
fi

# Check the database variables are set
test "$VDB_COMMAND"

# docker must be run in privileged mode for mounts to work
echo "Setting up /app/geth-rw overlayed /app/geth-ro"
mkdir -p /tmp/overlay
mount -t tmpfs tmpfs /tmp/overlay
mkdir -p /tmp/overlay/upper
mkdir -p /tmp/overlay/work
mkdir -p /app/geth-rw

mount -t overlay overlay -o lowerdir=/app/geth-ro,upperdir=/tmp/overlay/upper,workdir=/tmp/overlay/work /app/geth-rw

mkdir /var/run/statediff
cd /var/run/statediff

SETUID=""
if [[ -n "$TARGET_UID" ]] && [[ -n "$TARGET_GID" ]]; then
    SETUID="su-exec $TARGET_UID:$TARGET_GID"
    chown -R $TARGET_UID:$TARGET_GID /var/run/statediff
fi

START_TIME=`date -u +"%Y-%m-%dT%H:%M:%SZ"`
echo "Running the snapshot service" && \
if [[ -n "$LOG_FILE" ]]; then
  $SETUID /app/ipld-eth-state-snapshot "$VDB_COMMAND" $* |& $SETUID tee ${LOG_FILE}.console
  rc=$?
else
  $SETUID /app/ipld-eth-state-snapshot "$VDB_COMMAND" $*
  rc=$?
fi
STOP_TIME=`date -u +"%Y-%m-%dT%H:%M:%SZ"`

if [ $rc -eq 0 ] && [ "$VDB_COMMAND" == "stateSnapshot" ] && [ -n "$SNAPSHOT_BLOCK_HEIGHT" ]; then
  cat >metadata.json <<EOF
{
  "type": "snapshot",
  "range": { "start": $SNAPSHOT_BLOCK_HEIGHT, "stop": $SNAPSHOT_BLOCK_HEIGHT },
  "nodeId": "$ETH_NODE_ID",
  "genesisBlock": "$ETH_GENESIS_BLOCK",
  "networkId": "$ETH_NETWORK_ID",
  "chainId": "$ETH_CHAIN_ID",
  "time": { "start": "$START_TIME", "stop": "$STOP_TIME" }
}
EOF
  if [[ -n "$TARGET_UID" ]] && [[ -n "$TARGET_GID" ]]; then
    echo 'metadata.json' | cpio -p --owner $TARGET_UID:$TARGET_GID $FILE_OUTPUT_DIR
  else
    cp metadata.json $FILE_OUTPUT_DIR
  fi
fi

exit $rc