#!/bin/bash

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

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

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

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get --app=$app --key=domain)
server_name=$(ynh_app_setting_get --app=$app --key=server_name)
port=$(ynh_app_setting_get --app=$app --key=port)
botname=$(ynh_app_setting_get --app=$app --key=botname)
synapse_instance=$(ynh_app_setting_get --app=$app --key=synapse_instance)
app_service_registration_path=$(ynh_app_setting_get --app=$app --key=app_service_registration_path)
encryption=$(ynh_app_setting_get --app=$app --key=encryption)
mautrix_bridge_db_name=$(ynh_app_setting_get --app=$app --key=mautrix_bridge_db_name)
botadmin=$(ynh_app_setting_get --app=$app --key=botadmin)
botusers=$(ynh_app_setting_get --app=$app --key=botusers)

apiid=$(ynh_app_setting_get --app=$app --key=apiid)
apihash=$(ynh_app_setting_get --app=$app --key=apihash)
bottoken=$(ynh_app_setting_get --app=$app --key=bottoken)

upstream_version=$(ynh_app_setting_get --app=$app --key=mautrix_version)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)



#=================================================
# CHECK VERSION
#=================================================

### This helper will compare the version of the currently installed app and the version of the upstream package.
### $upgrade_type can have 2 different values
### - UPGRADE_APP if the upstream app version has changed
### - UPGRADE_PACKAGE if only the YunoHost package has changed
### ynh_check_app_version_changed will stop the upgrade if the app is up to date.
### UPGRADE_APP should be used to upgrade the core app only if there's an upgrade to do.
upgrade_type=$(ynh_check_app_version_changed)

#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
ynh_script_progression --message="Ensuring downward compatibility..." --time --weight=1

#
# N.B. : the followings setting migrations snippets are provided as *EXAMPLES*
# of what you may want to do in some cases (e.g. a setting was not defined on
# some legacy installs and you therefore want to initiaze stuff during upgrade)
#

# If db_name doesn't exist, create it
#if [ -z "$db_name" ]; then
#	db_name=$(ynh_sanitize_dbid --db_name=$app)
#	ynh_app_setting_set --app=$app --key=db_name --value=$db_name
#fi

# If final_path doesn't exist, create it
#if [ -z "$final_path" ]; then
#	final_path=/var/www/$app
#	ynh_app_setting_set --app=$app --key=final_path --value=$final_path
#fi

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up the app before upgrading (may take a while)..." --time --weight=1

# Backup the current version of the app
ynh_backup_before_upgrade
ynh_clean_setup () {
	# Restore it if the upgrade fails
	ynh_restore_upgradebackup
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# STOP SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Stopping a systemd service..." --time --weight=1

ynh_systemd_action --service_name=$app --action="stop" --log_path="/var/log/$app/$app.log"

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_script_progression --message="Upgrading source files..." --time --weight=1

	# Download, check integrity, uncompress and patch the source from app.src
	ynh_setup_source --dest_dir="$final_path"
fi

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_script_progression --message="Upgrading dependencies..." --time --weight=1

ynh_install_app_dependencies $pkg_dependencies

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Making sure dedicated system user exists..." --time --weight=1

# Create a dedicated user (if not existing)
ynh_system_user_create --username=$mautrix_bridge_user

#=================================================
# SPECIFIC UPGRADE
#=================================================
# ...
#=================================================

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
ynh_script_progression --message="Upgrading python packages..." --time --weight=1
$final_path/bin/pip3 install --upgrade setuptools wheel # HACK fixes "error: invalid command 'bdist_wheel'"
$final_path/bin/pip3 install --upgrade $final_path/src/mautrix-telegram.tar.gz[postgres,speedups,qr_login] #,hq_thumbnails
fi
#
#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Upgrading systemd configuration..." --time --weight=1

# Create a dedicated systemd config
ynh_add_systemd_config

#=================================================
# UPDATE/MODIFY THE CONFIG FILE
#=================================================

# main configuration
mautrix_config_path="$final_path/config.yaml"
ynh_backup_if_checksum_is_different --file="$mautrix_config_path"
# as_token hs_token are autogenerated, save them before regenerating the config
as_token=$(grep as_token "$mautrix_config_path" | sed "s/ *as_token: *//")
hs_token=$(grep hs_token "$mautrix_config_path" | sed "s/ *hs_token: *//")
# ynh_replace_string --match_string=__AS_TOKEN__ --replace_string="$as_token" --target_file="$mautrix_config_path"
# ynh_replace_string --match_string=__HS_TOKEN__ --replace_string="$hs_token" --target_file="$mautrix_config_path"
write_bridge_config

# upgrade the app-service-registration
ynh_backup_if_checksum_is_different --file="$app_service_registration_path/$app.yaml"
$final_path/bin/python3 -m mautrix_telegram -g -c "$mautrix_config_path" -r "$app_service_registration_path/$app.yaml"

# upgrade the alembic database
# TODO remove on next upgrade
# ynh_backup_if_checksum_is_different --file="$final_path/alembic.ini"
ynh_replace_string --match_string="script_location = alembic" \
  --replace_string="script_location = $final_path/alembic" \
  --target_file="$final_path/alembic.ini"
$final_path/bin/alembic  -c "$final_path/alembic.ini" -x config="$mautrix_config_path" upgrade head

# Recalculate and store the checksum of the file for the next upgrade.
ynh_store_file_checksum --file="$mautrix_config_path"
ynh_store_file_checksum --file="$app_service_registration_path/$app.yaml"
ynh_store_file_checksum --file="$final_path/alembic.ini"

#=================================================
# GENERIC FINALIZATION
#=================================================
# SECURE FILES AND DIRECTORIES
#=================================================

# Set permissions on app files
chown $mautrix_bridge_user:root -R $final_path

#=================================================
# SETUP LOGROTATE
#=================================================
ynh_script_progression --message="Upgrading logrotate configuration..." --time --weight=1

# Use logrotate to manage app-specific logfile(s)
ynh_use_logrotate --non-append --logfile "/var/log/$app/$app.log"

#=================================================
# INTEGRATE SERVICE IN YUNOHOST
#=================================================
ynh_script_progression --message="Integrating service in YunoHost..." --time --weight=1

yunohost service add $app --description "$app daemon for bridging Telegram and Matrix messages" --log "/var/log/$app/$app.log"

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

ynh_systemd_action --service_name=$app --action="start"

#=================================================
# RELOAD synapse
#=================================================
ynh_script_progression --message="Reloading synapse server..." --time --weight=1

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

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

ynh_script_progression --message="Upgrade of $app completed" --time --last