#!/bin/sh -e
#
# 2020 Timothée Floure (timothee.floure@ungleich.ch)
#
# This file is part of cdist.
#
# cdist is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# cdist is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with cdist. If not, see <http://www.gnu.org/licenses/>.
#

os=$(cat "$__global/explorer/os")
case "$os" in
   debian)
     # This type assume systemd for service installation.
   ;;
   *)
      printf "Your operating system (%s) is currently not supported by this type (%s)\n" "$os" "${__type##*/}" >&2
      printf "Please contribute an implementation for it if you can.\n" >&2
      exit 1
   ;;
esac

# Required parameters.
VERSION=$(cat "$__object/parameter/version")
if [ -f "$__object/parameter/config" ]; then
    CONFIG="$(cat "$__object/parameter/config")"
    if [ "$CONFIG" = "-" ]; then
        CONFIG=$(cat "$__object/stdin")
    fi
fi

# Hardcoded values used in templates.
export BINARY_PATH=/usr/local/bin/matterbridge
export CONFIG_PATH=/etc/matterbridge/matterbridge.toml
export USER=matterbridge
export GROUP=$USER

# Internal variables.
artefact="matterbridge-$VERSION-linux-64bit"
checksum_file="checksums.txt"
release_download_url=https://github.com/42wim/matterbridge/releases/download
binary_url="$release_download_url/v$VERSION/$artefact"
checksum_file_url="$release_download_url/v$VERSION/$checksum_file"
config_dir=$(dirname $CONFIG_PATH)
systemd_unit_path='/etc/systemd/system/matterbridge.service'

# Check if curl is available.
if ! command -v curl; then
     echo "curl is required for this type, but could not be found. Exiting." >&2
     exit 1
fi

# Initialize working directory.
mkdir -p "$__object/files"

# Download and check matterbridge binary.
curl -L "$binary_url" -o "$__object/files/$artefact"
curl -Ls "$checksum_file_url" | grep "$artefact" > "$__object/files/$checksum_file"
if ! (cd "$__object/files"; sha256sum --check $checksum_file); then
    echo "Matterbridge binary checksum failed." >&2
    exit 1
fi

# Create service user.
__user $USER --home "/var/lib/$USER"

# Deploy matterbridge binary.
require="__user/$USER" __file "$BINARY_PATH" \
  --source "$__object/files/$artefact" \
  --owner "$USER" --mode 755

# Generate and deploy configuration file.
"$__type/files/matterbridge.service.sh" > "$__object/files/matterbridge.service"

require="__user/$USER" __directory "$config_dir" \
  --owner "$USER" --mode 0755 --parents \

require="__directory/$config_dir" __file "$CONFIG_PATH" \
  --owner "$USER" \
  --mode 0640 \
  --source "$CONFIG"

__file "$systemd_unit_path" \
  --source "$__object/files/matterbridge.service"

# Deal with init system.
require="__file/$systemd_unit_path" __start_on_boot matterbridge
require="__file/$BINARY_PATH __file/$CONFIG_PATH __file/$systemd_unit_path" __service matterbridge --action restart