#!/usr/bin/env bash

# Assign latitude and longitude to buildings with OpenTOID data
# - assume postgres connection details are set in the environment using PGUSER, PGHOST etc.

: ${1?"Usage: $0 ./path/to/opentoid/dir"}

opentoid_dir=$1

echo "Converting OSGB36 Eastings and Northings to WGS84 longitude and latitude coordinates..."
python convert_opentoid_bng_latlon.py $opentoid_dir

echo "Creating a temporary table for coordinates..."
psql -c "CREATE TABLE open_toid (
    toid varchar,
    version_number smallint,
    version_date date,
    source_product varchar,
    easting float,
    northing float,
    longitude float,
    latitute float
);"

echo "Loading Open TOID CSV(s) to temporary table..."
find $opentoid_dir -type f -name '*.csv' \
-printf "$opentoid_dir/%f\n" | \
parallel \
cat {} '|' psql -c "\"COPY open_toid ( toid, version_number, version_date, source_product, easting, northing, longitude, latitute ) FROM stdin WITH CSV HEADER;\""

# Convert the northing/easting coordinates to latitude/longitute with PostGIS
# psql -c "select AddGeometryColumn( 'public', 'open_toid', 'the_geom', 27700, 'POINT', 2);"
# psql -c "update open_toid set the_geom=GeomFromText('POINT('||easting||' '||northing||')',27700);"
# psql -c "update open_toid set longitude=st_x(st_transform(the_geom,4326)), latitude=st_y(st_transform(the_geom,4326));"

# Update the buildings table with coordinates
# psql -c ""


# Delete the temporary table
# psql -c "DROP TABLE open_toid;"