#!/bin/bash

#=================================================
# GENERIC START
#=================================================
# IMPORT GENERIC HELPERS
#=================================================

source _common.sh
source /usr/share/yunohost/helpers

#=================================================
# MANAGE SCRIPT FAILURE
#=================================================

ynh_clean_setup () {
	### Remove this function if there's nothing to clean before calling the remove script.
	true
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# RETRIEVE ARGUMENTS FROM THE MANIFEST
#=================================================

botname=$YNH_APP_ARG_BOTNAME
bot_synapse_adm=true
#encryption=$YNH_APP_ARG_ENCRYPTION
encryption=false
botadmin=$YNH_APP_ARG_BOTADMIN
botusers=$YNH_APP_ARG_BOTUSERS
if [ "$botusers" = "admin" ]
then
	botusers=$botadmin
fi
synapsenumber=$YNH_APP_ARG_SYNAPSENUMBER
# ToDo check (in manifest?) if the selected synapse instance is not already connected to a mautrix_bridge bridge
if [ $synapsenumber -eq "1" ]
then
synapse_instance="synapse"
else
synapse_instance="synapse__$synapsenumber"
fi
server_name=$(ynh_app_setting_get --app $synapse_instance --key server_name)
domain=$(ynh_app_setting_get --app $synapse_instance --key domain)

mautrix_version=$(ynh_app_upstream_version)
app=$YNH_APP_INSTANCE_NAME

#=================================================
# CHECK IF THE APP CAN BE INSTALLED WITH THESE ARGS
#=================================================
ynh_script_progression --message="Validating installation parameters..." --weight=1

final_path=/opt/yunohost/$app
test ! -e "$final_path" || ynh_die --message="This path already contains a folder"
ynh_app_setting_set --app=$app --key=final_path --value=$final_path

#=================================================
# SET CONSTANTS
#=================================================

enable_relaybot=true
bot_synapse_db_user="@$botname:$server_name"
synapse_db_name="matrix_$synapse_instance"

signald_user="signald" # This is actually chosen by the signald dependency

#=================================================
# STORE SETTINGS FROM MANIFEST
#=================================================
ynh_script_progression --message="Storing installation settings..." --weight=7

ynh_app_setting_set --app=$app --key=domain --value=$domain
ynh_app_setting_set --app=$app --key=server_name --value=$server_name
ynh_app_setting_set --app=$app --key=botname --value=$botname
ynh_app_setting_set --app=$app --key=synapse_instance --value=$synapse_instance
ynh_app_setting_set --app=$app --key=bot_synapse_adm --value=$bot_synapse_adm
ynh_app_setting_set --app=$app --key=encryption --value=$encryption
ynh_app_setting_set --app=$app --key=botadmin --value=$botadmin
ynh_app_setting_set --app=$app --key=botusers --value=$botusers
ynh_app_setting_set --app=$app --key=mautrix_version --value=$mautrix_version

#=================================================
# STANDARD MODIFICATIONS
#=================================================
# FIND AND OPEN A PORT
#=================================================
ynh_script_progression --message="Finding an available port..." --weight=1

# Find a free port for communication between your local synapse instance (home server) and its app service mautrix_bridge.
port=$(ynh_find_port --port=8449)
ynh_app_setting_set --app=$app --key=port --value=$port

#=================================================
# INSTALL DEPENDENCIES
#=================================================
ynh_script_progression --message="Installing dependencies..." --weight=10

ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies

ynh_install_extra_app_dependencies --repo="http://http.debian.net/debian buster-backports main" --package="libolm-dev" --key="https://keyserver.ubuntu.com/pks/lookup?search=0x0E98404D386FA1D9&op=get"

ynh_script_progression --message="Installing dependencies..." --weight=10
ynh_install_extra_app_dependencies --repo="https://updates.signald.org unstable main" --package="$extra_dependencies" --key="https://updates.signald.org/apt-signing-key.asc"

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Configuring system user..." --weight=1

# Create a system user
# Add the user to the signald group. The signald group was created when the signald
# package was installed from the extra repository
ynh_system_user_create --username=$app --groups="$signald_user"

#=================================================
# CREATE A POSTGRESQL DATABASE
#=================================================
ynh_script_progression --message="Creating a PostgreSQL database..." --weight=3

db_name=$(ynh_sanitize_dbid --db_name=$app)
ynh_app_setting_set --app=$app --key=db_name --value=$db_name
db_pwd=$(ynh_string_random --length=30)
ynh_app_setting_set --app=$app --key=db_pwd --value=$db_pwd
ynh_psql_test_if_first_run
ynh_psql_setup_db --db_user=$db_name --db_name=$db_name --db_pwd=$db_pwd

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================
ynh_script_progression --message="Setting up source files..." --weight=3

# Download, check integrity, uncompress and patch the source from app.src
ynh_setup_source --dest_dir="$final_path/src"
chmod 750 "$final_path"
chown $app:$app "$final_path"

#=================================================
# ADD A CONFIGURATION
#=================================================
ynh_script_progression --message="Configuring Mautrix Bridge..." --weight=2

# https://docs.python.org/3.6/library/logging.html#logging-levels
log_level="INFO"

ynh_add_config --template="../conf/config.yaml" --destination="$final_path/config.yaml"
chmod -R 750 "$final_path"
chown -R $app:$app "$final_path"

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Configuring a systemd service..." --weight=3

# Create a dedicated systemd config
ynh_add_systemd_config

#=================================================
# INSTALL MAUTRIX-BRIDGE PYTHON MODULE
#=================================================
ynh_script_progression --message="Configuring python3 virtual environment" --weight=6

mkdir -p /var/log/$app
# Configure Mautrix-Bridge
python3 -m venv $final_path
$final_path/bin/pip3 install --upgrade pip setuptools wheel

ynh_script_progression --message="Installing Bridge with pip" --weight=6

# Pre-compiled python-olm to avoid libolm-dev, python3-dev -> does not work for arm
#$final_path/bin/pip3 install --upgrade python-olm --extra-index-url https://gitlab.matrix.org/api/v4/projects/27/packages/pypi/simple
# Build with libolm3 end-to-bridge encryption
$final_path/bin/pip3 install $final_path/src/mautrix-signal.tar.gz[metrics,e2be,formattednumbers,qrlink,stickers]

#=================================================
# REGISTER SYNAPSE APP-SERVICE
#=================================================

$final_path/bin/python3 -m mautrix_signal -g -c $final_path/config.yaml -r /etc/matrix-$synapse_instance/app-service/$app.yaml

/opt/yunohost/matrix-$synapse_instance/update_synapse_for_appservice.sh \
    || ynh_die "Synapse can't restart with the appservice configuration"

#=================================================
# STORE THE CONFIG FILE CHECKSUM
#=================================================

# Calculate and store the config file checksum into the app settings
ynh_store_file_checksum --file="/etc/matrix-$synapse_instance/app-service/$app.yaml"
ynh_store_file_checksum --file="$final_path/config.yaml"

#=================================================
# GENERIC FINALIZATION
#=================================================
# SETUP LOGROTATE
#=================================================
ynh_script_progression --message="Configuring log rotation..." --weight=3

# Use logrotate to manage application logfile(s)
ynh_use_logrotate
chmod -R 600 "/var/log/$app"
chmod 700 "/var/log/$app"
chown -R $app:$app /var/log/$app

#=================================================
# ADVERTISE SERVICE IN ADMIN PANEL
#=================================================
ynh_script_progression --message="Integrating service in YunoHost..." --weight=1
yunohost service add $app --description="Bridging Signal and Matrix messages" --log=/var/log/$app/$app.log

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting a systemd service..." --weight=2

# Start a systemd service
sleep 2
chown -R $app:$app "$final_path"
ynh_systemd_action --service_name=$app --action="start" --log_path="/var/log/$app/$app.log"
## Wait until the synapse user is created
#sleep 30
#   # (Note that, by default, non-admins might not have your homeserver's permission to create communities.)
#   if [ "$bot_synapse_adm" = true ]
#   then
#    ynh_psql_execute_as_root --database=$synapse_db_name --sql="UPDATE users SET admin = 1 WHERE name = ""$botname"";"
#    #yunohost app action run $synapse_instance set_admin_user -a username=$botname
#   fi
#ynh_systemd_action --service_name=$app --action="restart"

#=================================================
# END OF SCRIPT
#=================================================

ynh_script_progression --message="Installation of $app completed" --last