#!/usr/bin/env bash
set -eau -o pipefail

if [ "$#" -ne 2 ]; then
    echo "Usage: ingest path-to-directory-containing-IPE-CSVs path-to-generated-db"
    echo ""
    exit 1
fi
fullIpeDirPath=$(realpath "${1}")
fullDbPath=$(realpath "${2}")

tmpSql=$(mktemp)
clean_tmp () {
    rm "${tmpSql}"
}
trap clean_tmp EXIT

echo "[+] Ingesting IPE data."
echo "    The following files will be ingested."
echo ""
ipeFiles=$(find "${fullIpeDirPath}" -name '*.csv')
cat > "${tmpSql}" <<EOF
.separator ";"
EOF

for ipeFile in ${ipeFiles}; do
echo "    ${ipeFile}"
cat >> "${tmpSql}" <<EOF
.import ${ipeFile} ipe
EOF
done
echo ""

sqlite3 "${fullDbPath}" < "${tmpSql}"

echo "[+] Ingesting spatial data."

cat > "${tmpSql}" <<EOF
SELECT load_extension("mod_spatialite");
SELECT InitSpatialMetaData();

-- Despite the SELECT, we're actually creating a new ImmeubleGeoPoint
-- column here. The spatialite API is a bit weird...
SELECT AddGeometryColumn('ipe','ImmeubleGeoPoint',4326,'POINT');

-- The geodata is expressed in RGF93 (SRID 2154). We need to project
-- it to WSG84 to display it on a OSM map.
UPDATE ipe SET ImmeubleGeoPoint =
    Transform(
        MakePoint(
            CAST(CoordonneeImmeubleX as DOUBLE),
            CAST(CoordonneeImmeubleY as DOUBLE),
            2154)
        ,4326);
EOF
sqlite3 "${fullDbPath}" < "${tmpSql}"

echo "[+] Creating Rtree index (spatial index). We're almost done."
cat > "${tmpSql}" <<EOF
SELECT load_extension("mod_spatialite");
SELECT CreateSpatialIndex('ipe','ImmeubleGeoPoint');
EOF
sqlite3 "${fullDbPath}" < "${tmpSql}"

echo "[+] SQLite database generated at ${fullDbPath}"