#!/bin/sh

if [ -z "$*" ];
then
	echo "Usage: magma_get <magma_url> <project_name> <model_name> <attribute_name>"
	exit
fi

MAGMA_URL=$1
PROJECT_NAME=$2
MODEL_NAME=$3
ATTRIBUTE_NAME=$4

TXT=$(wget --quiet -O - \
	--post-data="{\"format\": \"tsv\", \"project_name\":\"$PROJECT_NAME\", \"model_name\":\"$MODEL_NAME\", \"record_names\":\"all\", \"attribute_names\":[ \"$ATTRIBUTE_NAME\" ]}" \
	--header=Content-Type:application/json \
	--header="Authorization: Etna $TOKEN" "$MAGMA_URL/retrieve")


# the column ordering is poorly defined
HEADER=$(echo "$TXT" | head -1)
BODY=$(echo "$TXT" | tail -n +2)
DATA_COLUMN=$(echo "$HEADER" |tr '\t' '\n'|awk "/$ATTRIBUTE_NAME/ {print FNR}")

echo $DATA_COLUMN
[[ "$DATA_COLUMN" == 1 ]] && IDENTIFIER_COLUMN=2 || IDENTIFIER_COLUMN=1

echo "$BODY" | while read; do
	IDENTIFIER=$(cut -d$'\t' -f$IDENTIFIER_COLUMN <<<"$REPLY")
	FILE=$(cut -d$'\t' -f$DATA_COLUMN <<<"$REPLY")
	[[ -z "$FILE" ]] && continue
	[[ $FILE =~ \.([a-z]*)\? ]] && SUFFIX=${BASH_REMATCH[1]}
	FILENAME="$PROJECT_NAME-$MODEL_NAME-$IDENTIFIER-$ATTRIBUTE_NAME.$SUFFIX"
	echo "getting $FILENAME from $FILE"
	wget -O $FILENAME $FILE
done