#!/bin/bash
set -e

SCRIPTPATH=$(cd "$(dirname "$0")" > /dev/null; pwd -P)
SOURCE_DIR=$(cd "$SCRIPTPATH" > /dev/null; cd ../.. > /dev/null; pwd -P)
DATA_DIR="$SOURCE_DIR/data/postgres"
PLUGINS_DIR="$SOURCE_DIR/plugins"

show_help() {
cat <<EOF
Usage: ${0##*/} [-e VAR=VAL] [--env VAR=VAL] [--env-file filename] [-h] [--init]

  -e, --env       set environment variables
      --env-file  pass in a file containing a list of environment variable assignments
      --init      perform first-time initialization
  -p --net-public publish ports on container on 0.0.0.0 (less secure as users on LAN may see dev env)
EOF
}

initialize=""
ENV_ARGS=""
local_publish="127.0.0.1"

while [ "${#@}" -ne "0" ]; do
    case "$1" in
        -h | --help)
            show_help
            exit 0
            ;;
        -i | --init)
            initialize="initialize"
            ;;
        -p | --net-public)
            local_publish="0.0.0.0"
            ;;
        -e | --env)
            if [ -z "$2" ]; then
                show_help
                exit 0
            else
                ENV_ARGS+=" -e $2"
                shift
            fi
            ;;
        --env-file)
            if [ -z "$2" ]; then
                show_help
                exit 0
            else
                ENV_ARGS="--env-file=$2"
                break
            fi
            ;;
        *)
            echo "unexpected argument: $1" >& 2
            show_help >& 2
            exit 1
            ;;
    esac
    shift
done

if [[ $(docker info -f "{{.Architecture}}") != *x86_64* ]]; then
    echo "WARNING: Docker architecture is not x86_64."
    echo "Discourse development is unlikely to work using Docker's architecture emulation."
    echo "Please try a native development installation."
    sleep 1
fi

echo "Using source in: ${SOURCE_DIR}"
echo "Using data in:   ${DATA_DIR}"

mkdir -p "${DATA_DIR}"

mount_plugin_symlinks=""
for symlink in $(find $PLUGINS_DIR -maxdepth 1 -type l); do
    # `readlink -f` doesn't work on macOS, to fix it you need to override the `readlink` with `greadlink`
    # > brew install coreutils
    # > ln -s "$(which greadlink)" "$(dirname "$(which greadlink)")/readlink"
    # reference: https://meta.discourse.org/t/beginners-guide-to-install-discourse-for-development-using-docker/102009/124?u=aleber
    symlink_value=$(readlink -f $symlink)
    plugin_name=$(basename $symlink)
    mount_plugin_symlinks+=" -v ${symlink_value}:/src/plugins/${plugin_name}:delegated"
done
[[ ! -z "$mount_plugin_symlinks" ]] && echo "Mounting symlinks for plugins: ${mount_plugin_symlinks}"

# 8025 mailhog
# 3000 puma... if you must (but unicorn is preferred)
# 9292 unicorn
# 9405 prometheus exporter

docker pull discourse/discourse_dev:release
docker run -d \
    -p $local_publish:8025:8025 \
    -p $local_publish:3000:3000 \
    -p $local_publish:4200:4200 \
    -p $local_publish:9292:9292 \
    -p $local_publish:9405:9405 \
    -v "$DATA_DIR:/shared/postgres_data:delegated" \
    -v "$SOURCE_DIR:/src:delegated" \
    -e UNICORN_BIND_ALL=true \
    $mount_plugin_symlinks \
    $ENV_ARGS \
    --hostname=discourse \
    --name=discourse_dev \
    --restart=always \
    discourse/discourse_dev:release /sbin/boot

echo "Installing gems..."
"${SCRIPTPATH}/bundle" install

echo "Yarn install..."
"${SCRIPTPATH}/exec" yarn install --cwd app/assets/javascripts/discourse

if [ "${initialize}" = "initialize" ]; then
    echo "Migrating database..."
    "${SCRIPTPATH}/rake" db:migrate
    RAILS_ENV=test "${SCRIPTPATH}/rake" db:migrate

    echo "Creating admin user..."
    "${SCRIPTPATH}/rake" admin:create
fi