#!/usr/bin/env bash

if [ "$#" -ne 2 ]; then
    echo "Usage: ./libpostal_data [upload|download] data_dir"
fi

LIBPOSTAL_S3_BUCKET_NAME="libpostal"
LIBPOSTAL_S3_KEY="s3://$LIBPOSTAL_S3_BUCKET_NAME"
LIBPOSTAL_S3_BUCKET_URL="http://$LIBPOSTAL_S3_BUCKET_NAME.s3.amazonaws.com"
LIBPOSTAL_DATA_FILE="libpostal_data.tar.gz"


COMMAND=$1
LIBPOSTAL_DATA_DIR=$2

LIBPOSTAL_DATA_UPDATED_PATH=$LIBPOSTAL_DATA_DIR/last_updated

BASIC_MODULE_DIRS=(address_expansins numex transliteration)

EPOCH_DATE="Jan  1 00:00:00 1970"

download_file() {
    updated_path=$1
    data_dir=$2
    filename=$3
    name=$4

    local_path=$data_dir/$filename

    if [ ! -e $updated_path ]; then
        echo "$EPOCH_DATE" > $updated_path;
    fi;

    echo "Checking for new libpostal $name..."

    if [ $(curl $LIBPOSTAL_S3_BUCKET_URL/$filename -z "$(cat $updated_path)" --silent --remote-time -o $local_path -w %{http_code}) = "200" ]; then        
        echo "New libpostal $name available"
        if date -r . >/dev/null 2>&1; then
            echo $(date -d "$(date -d "@$(date -r $local_path +%s)") + 1 second") > $updated_path;
        elif stat -f %Sm . >/dev/null 2>&1; then
            echo $(date -r $(stat -f %m $local_path) -v+1S) > $updated_path;
        fi;
        tar -xvzf $local_path -C $data_dir;
        rm $local_path;
    else
        echo "libpostal $name up to date"
    fi
}

if [ $COMMAND = "download" ]; then
    mkdir -p $LIBPOSTAL_DATA_DIR

    download_file $LIBPOSTAL_DATA_UPDATED_PATH $LIBPOSTAL_DATA_DIR $LIBPOSTAL_DATA_FILE "data file"

elif [ $COMMAND = "upload" ]; then
    tar -C $LIBPOSTAL_DATA_DIR -cvzf $LIBPOSTAL_DATA_DIR/$LIBPOSTAL_DATA_FILE ${BASIC_MODULE_DIRS[*]}
    aws s3 cp --acl=public-read $LIBPOSTAL_DATA_DIR/$LIBPOSTAL_DATA_FILE $LIBPOSTAL_S3_KEY
else
    echo "Invalid command: $COMMAND"
    exit 1
fi