#!/bin/bash

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

# Keep this path for calling _common.sh inside the execution's context of backup and restore scripts
source ../settings/scripts/_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

#=================================================
# LOAD SETTINGS
#=================================================
ynh_script_progression --message="Loading installation settings..." --weight=1

app=$YNH_APP_INSTANCE_NAME

final_path=$(ynh_app_setting_get --app=$app --key=final_path)
domain=$(ynh_app_setting_get --app=$app --key=domain)
server_name=$(ynh_app_setting_get --app=$app --key=server_name)
botname=$(ynh_app_setting_get --app=$app --key=botname)
synapse_instance=$(ynh_app_setting_get --app=$app --key=synapse_instance)
bot_synapse_adm=$(ynh_app_setting_get --app=$app --key=bot_synapse_adm)
encryption=$(ynh_app_setting_get --app=$app --key=encryption)
botusers=$(ynh_app_setting_get --app=$app --key=botusers)
botadmin=$(ynh_app_setting_get --app=$app --key=botadmin)
previous_mautrix_version=$(ynh_app_setting_get --app=$app --key=mautrix_version)
port=$(ynh_app_setting_get --app=$app --key=port)

db_name=$(ynh_app_setting_get --app=$app --key=db_name)
db_pwd=$(ynh_app_setting_get --app=$app --key=db_pwd)

mautrix_version=$(ynh_app_upstream_version)

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

synapse_db_name="matrix_$synapse_instance"
bot_synapse_db_user="@$botname:$server_name"
signald_data="/var/lib/signald"
#signald_exe="/usr/bin/signald"
signald_user="signald" # This is actually chosen by the signald dependency

#=================================================
# CHECK IF THE APP CAN BE RESTORED
#=================================================
ynh_script_progression --message="Validating restoration parameters..." --weight=1

test ! -d $final_path || ynh_die --message="There is already a directory: $final_path "

#=================================================
# STANDARD RESTORATION STEPS
#=================================================
# REINSTALL DEPENDENCIES
#=================================================
# We need to install dependencies before recreating the dedicated user,
# as the dependencies create the `signald` user and group.
# Another option would be to `usermod -aG "$signald_user" $app` later.
ynh_script_progression --message="Reinstalling dependencies..." --weight=1

ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies

# libolm-dev avoided by pre-compiled python-olm
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_install_extra_app_dependencies --repo="https://updates.signald.org unstable main" --package="$extra_dependencies" --key="https://updates.signald.org/apt-signing-key.asc"

#=================================================
# RECREATE THE DEDICATED USER
#=================================================
ynh_script_progression --message="Recreating the dedicated system user..." --weight=1

# Create the dedicated user (if not existing)
ynh_system_user_create --username=$app --groups="$signald_user"

#=================================================
# RESTORE THE APP MAIN DIR
#=================================================
ynh_script_progression --message="Restoring the app main directory..." --weight=1

ynh_restore_file --origin_path="$final_path"

#=================================================
# RESTORE USER RIGHTS
#=================================================

# Restore permissions on app files
chmod 750 "$final_path"
chown $app:$app "$final_path"
chmod -R 750 "$final_path"
chown -R $app:$app "$final_path"

#=================================================
# RESTORE THE POSTGRESQL DATABASE
#=================================================
ynh_script_progression --message="Restoring the PostgreSQL database..." --weight=8

ynh_psql_test_if_first_run
ynh_psql_setup_db --db_user=$db_name --db_name=$db_name --db_pwd=$db_pwd
ynh_psql_execute_file_as_root --file="./db.sql" --database=$db_name
#ynh_psql_execute_as_root --sql="CREATE DATABASE ""$db_name"" ENCODING 'UTF8' LC_COLLATE='C' LC_CTYPE='C' template=template0 OWNER ""$dbname"";"

#=================================================
# SPECIFIC RESTORATION
#=================================================
# RESTORE MAUTRIX-BRIDGE PYTHON MODULE
#=================================================

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

# Pre-compiled python-olm to avoid libolm-dev, python3-dev
#$final_path/bin/pip3 install --upgrade python-olm --extra-index-url https://gitlab.matrix.org/api/v4/projects/27/packages/pypi/simple

#=================================================
# 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"

#=================================================
# RESTORE SYSTEMD
#=================================================
ynh_script_progression --message="Restoring the systemd configuration..." --weight=1

ynh_restore_file --origin_path="/etc/systemd/system/$app.service"
systemctl enable $app.service --quiet

#=================================================
# RESTORE THE LOGROTATE CONFIGURATION
#=================================================

ynh_use_logrotate
chmod -R 600 "/var/log/$app"
chmod 700 "/var/log/$app"
chown -R $app:$app /var/log/$app

#=================================================
# INTEGRATE SERVICE IN YUNOHOST
#=================================================
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"

#=================================================
# RESTORE VARIOUS FILES
#=================================================

ynh_systemd_action --service_name=signald --action="stop"
ynh_restore_file --origin_path="$signald_data"
ynh_systemd_action --service_name=signald --action="start"

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting a systemd service..." --weight=1

# Start a systemd service
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="Restoration completed for $app" --last