#!/usr/bin/env bash
set -x
set -e

POSTGRES_USER="postgres"
if [ "$(uname)" = "OpenBSD" ]; then
  POSTGRES_USER="_postgresql"
fi

ROOT_POSTGRES=(sudo -i -u "$POSTGRES_USER" psql)
DEFAULT_DB=""
if [ "$(uname)" = "Darwin" ]; then
   ROOT_POSTGRES=(psql)
   DEFAULT_DB="postgres"
fi

if [ "$(uname)" = "OpenBSD" ]; then
  DEFAULT_DB="postgres"
fi

VAGRANTUSERNAME=$(whoami)

if [[ $# == 0 ]]; then
    USERNAME=zulip
    PASSWORD=$("$(dirname "$0")/../../scripts/get-django-setting" LOCAL_DATABASE_PASSWORD)
    DBNAME=zulip
    SEARCH_PATH="$USERNAME",public
elif [[ $# == 4 ]]; then
    USERNAME=$1
    PASSWORD=$2
    DBNAME=$3
    SEARCH_PATH=$4
else
    echo "Usage Instructions"
    echo "Run with either no arguments (sets up devel db for local deploy--zulip with user zulip)"
    echo "or specify <db-username> <password> <db-name> <user-schema-search-path>"
    exit
fi

DBNAME_BASE=${DBNAME}_base

if ! pg_isready -U "$POSTGRES_USER" -q; then
    set +x
    echo
    echo 'ERROR: PostgreSQL Server is not running! Ensure the service is enabled.'
    # shellcheck disable=SC2016
    echo 'ERROR: Try `sudo service postgresql start`?'
    echo "ERROR: You can easily test if you fixed it using: pg_isready -U \$POSTGRES_USER"
    exit 1
fi

"${ROOT_POSTGRES[@]}" -v ON_ERROR_STOP=1 -e "$DEFAULT_DB" << EOF
DO \$\$BEGIN
    CREATE USER $USERNAME;
EXCEPTION WHEN duplicate_object THEN
    RAISE NOTICE '$USERNAME user already exists';
END\$\$;
ALTER USER $USERNAME PASSWORD '$PASSWORD';
ALTER USER $USERNAME CREATEDB;
ALTER ROLE $USERNAME SET search_path TO $SEARCH_PATH;

DO \$\$BEGIN
    CREATE USER $VAGRANTUSERNAME;
EXCEPTION WHEN duplicate_object THEN
    RAISE NOTICE '$VAGRANTUSERNAME user already exists';
END\$\$;
GRANT $USERNAME TO $VAGRANTUSERNAME;
ALTER ROLE $VAGRANTUSERNAME SET search_path TO $SEARCH_PATH;
EOF

umask go-rw
PGPASS_PREFIX="*:*:*:$USERNAME:"
PGPASS_ESCAPED_PREFIX="*:\\*:\\*:$USERNAME:"
if ! grep -q "$PGPASS_ESCAPED_PREFIX" ~/.pgpass; then
    echo "$PGPASS_PREFIX$PASSWORD" >> ~/.pgpass
else
    sed -i "s/$PGPASS_ESCAPED_PREFIX.*\$/$PGPASS_PREFIX$PASSWORD/" ~/.pgpass
fi
chmod go-rw ~/.pgpass

"$(dirname "$0")/../../scripts/setup/terminate-psql-sessions" "$USERNAME" "$DBNAME" "$DBNAME_BASE"

psql -v ON_ERROR_STOP=1 -e -h localhost postgres "$USERNAME" <<EOF
DROP DATABASE IF EXISTS $DBNAME;
DROP DATABASE IF EXISTS $DBNAME_BASE;
CREATE DATABASE $DBNAME_BASE
EOF

psql -v ON_ERROR_STOP=1 -e -h localhost "$DBNAME_BASE" "$USERNAME" <<EOF
CREATE SCHEMA zulip;
EOF

"${ROOT_POSTGRES[@]}" -v ON_ERROR_STOP=1 -e "$DBNAME_BASE" << EOF
CREATE EXTENSION tsearch_extras SCHEMA zulip;
CREATE EXTENSION pgroonga;
GRANT USAGE ON SCHEMA pgroonga TO $USERNAME;
EOF

psql -v ON_ERROR_STOP=1 -e -h localhost postgres "$USERNAME" <<EOF
CREATE DATABASE $DBNAME TEMPLATE $DBNAME_BASE;
EOF

sh "$(dirname "$0")/../../scripts/setup/flush-memcached"

echo "Database created"