#!/bin/bash

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

source _common.sh
source ynh_add_swap
source ynh_install_ruby__2
source ynh_redis
source ynh_send_readme_to_admin__2
source /usr/share/yunohost/helpers

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

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get --app=$app --key=domain)
path_url=$(ynh_app_setting_get --app=$app --key=path)

final_path=$(ynh_app_setting_get --app=$app --key=final_path)
final_path_www=$(ynh_app_setting_get --app=$app --key=final_path_www)
final_path_extensions=$(ynh_app_setting_get --app=$app --key=final_path_extensions)

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

port_syncing_server_js=$(ynh_app_setting_get --app=$app --key=port_syncing_server_js)
port_syncing_server_js_worker=$(ynh_app_setting_get --app=$app --key=port_syncing_server_js_worker)
port_auth=$(ynh_app_setting_get --app=$app --key=port_auth)
port_auth_worker=$(ynh_app_setting_get --app=$app --key=port_auth_worker)
port_api_gateway=$(ynh_app_setting_get --app=$app --key=port_api_gateway)

redis_db=$(ynh_app_setting_get --app=$app --key=redis_db)

jwt_secret=$(ynh_app_setting_get --app=$app --key=jwt_secret)
legacy_jwt_secret=$(ynh_app_setting_get --app=$app --key=legacy_jwt_secret)
auth_jwt_secret=$(ynh_app_setting_get --app=$app --key=auth_jwt_secret)
pseudo_key_params_key=$(ynh_app_setting_get --app=$app --key=pseudo_key_params_key)
encryption_server_key=$(ynh_app_setting_get --app=$app --key=encryption_server_key)

syncing_server_js_version_installed=$(ynh_app_setting_get --app=$app --key=syncing_server_js_version)
auth_version_installed=$(ynh_app_setting_get --app=$app --key=auth_version)
api_gateway_version_installed=$(ynh_app_setting_get --app=$app --key=api_gateway_version)
extensions_version_installed=$(ynh_app_setting_get --app=$app --key=extension_version)

config_syncing_server_js="$final_path/live/syncing-server-js.env"
config_syncing_server_js_worker="$final_path/live/syncing-server-js-worker.env"
config_auth="$final_path/live/auth.env"
config_auth_worker="$final_path/live/auth-worker.env"
config_api_gateway="$final_path/live/api-gateway.env"

standalone=$(ynh_app_setting_get --app=$app --key=standalone)

#=================================================
# 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)

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

if [[ ! $standalone ]];
then
    ynh_remove_systemd_config --service=$app
else
    ynh_systemd_action \
        --service_name="$app-syncing-server-js" \
        --action="stop" \
        --log_path="/var/log/$app/syncing-server-js.log"
    ynh_systemd_action \
        --service_name="$app-syncing-server-js-worker" \
        --action="stop" \
        --log_path="/var/log/$app/syncing-server-js-worker.log"
    ynh_systemd_action \
        --service_name="$app-auth" \
        --action="stop" \
        --log_path="/var/log/$app/auth.log"
    ynh_systemd_action \
        --service_name="$app-auth-worker" \
        --action="stop" \
        --log_path="/var/log/$app/auth-worker.log"
    ynh_systemd_action \
        --service_name="$app-api-gateway" \
        --action="stop" \
        --log_path="/var/log/$app/api-gateway.log"
fi

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

# Cleaning legacy permissions
if ynh_legacy_permissions_exists; then
    ynh_legacy_permissions_delete_all

    ynh_app_setting_delete --app=$app --key=is_public
fi

# Everyone can access the app.
if [[ $(ynh_permission_exists --permission="main") && ! $standalone ]]
then
    ynh_permission_update --permission="main" --add="visitors" --show_tile="false"
fi
if ! ynh_permission_exists --permission="main"
then
    ynh_permission_create --permission="main" --url="/" --allowed="visitors" --show_tile="false"
fi
# Create a permission if needed
if ! ynh_permission_exists --permission="help"
then
    ynh_permission_create --permission="help" --url="/help/" --allowed="all_users" --show_tile="true" --label="Help"
fi

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

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

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

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

# If port_syncing_server_js doesn't exist, create it
if [ -z "$port_syncing_server_js" ]; then
    port_syncing_server_js=$(ynh_find_port --port=3000)
    ynh_app_setting_set --app=$app --key=port_syncing_server_js --value=$port_syncing_server_js
fi

# If port_syncing_server_js_worker doesn't exist, create it
if [ -z "$port_syncing_server_js_worker" ]; then
    port_syncing_server_js_worker=$(ynh_find_port --port=$((port_syncing_server_js+1)))
    ynh_app_setting_set --app=$app --key=port_syncing_server_js_worker --value=$port_syncing_server_js_worker
fi

# If port_auth doesn't exist, create it
if [ -z "$port_auth" ]; then
    port_auth=$(ynh_find_port --port=$((port_syncing_server_js_worker+1)))
    ynh_app_setting_set --app=$app --key=port_auth --value=$port_auth
fi

# If port_auth_worker doesn't exist, create it
if [ -z "$port_auth_worker" ]; then
    port_auth_worker=$(ynh_find_port --port=$((port_auth+1)))
    ynh_app_setting_set --app=$app --key=port_auth_worker --value=$port_auth_worker
fi

# If port_api_gateway doesn't exist, create it
if [ -z "$port_api_gateway" ]; then
    port_api_gateway=$(ynh_find_port --port=$((port_auth_worker+1)))
    ynh_app_setting_set --app=$app --key=port_api_gateway --value=$port_api_gateway
fi

# If jwt_secret doesn't exist, create it
if [ -z "$jwt_secret" ]; then
    jwt_secret=$(ynh_string_random --length=48 | base64)
    ynh_app_setting_set --app=$app --key=jwt_secret --value=$jwt_secret
fi

# If legacy_jwt_secret doesn't exist, create it
if [ -z "$legacy_jwt_secret" ]; then
    legacy_jwt_secret=$(ynh_string_random --length=48 | base64)
    ynh_app_setting_set --app=$app --key=legacy_jwt_secret --value=$legacy_jwt_secret
fi

# If auth_jwt_secret doesn't exist, create it
if [ -z "$auth_jwt_secret" ]; then
    auth_jwt_secret=$(ynh_string_random --length=48 | base64)
    ynh_app_setting_set --app=$app --key=auth_jwt_secret --value=$auth_jwt_secret
fi

# If pseudo_key_params_key doesn't exist, create it
if [ -z "$pseudo_key_params_key" ]; then
    pseudo_key_params_key=$(ynh_string_random --length=48 | base64)
    ynh_app_setting_set --app=$app --key=pseudo_key_params_key --value=$pseudo_key_params_key
fi

# If encryption_server_key doesn't exist, create it
if [ -z "$encryption_server_key" ]; then
    encryption_server_key=$(hexdump -n 32 -e '4/4 "%08X"' /dev/random) # 32bytes hex key is required
    ynh_app_setting_set --app=$app --key=encryption_server_key --value=$encryption_server_key
fi

# Remove old Settings, Services, Files, Dependencies
# If access_domain exist, delete it
if [ -n $(ynh_app_setting_get --app="$app" --key=access_domain) ]; then
    ynh_app_setting_delete --app=$app --key=access_domain
fi

# If mail exist, delete it
if [ -n $(ynh_app_setting_get --app="$app" --key=mail) ]; then
    ynh_app_setting_delete --app=$app --key=mail
fi

# If port exist, delete it
if [ -n $(ynh_app_setting_get --app="$app" --key=port) ]; then
    ynh_app_setting_delete --app=$app --key=port
fi

# If old service exsits; remove it
if ynh_exec_warn_less yunohost service status "$app" >/dev/null
then
    ynh_script_progression --message="Removing $app service..."  --weight=1
    yunohost service remove "$app"
fi

# Remove old config scripts
if [ -e "/etc/yunohost/apps/$app/config_panel.toml" ]; then
    ynh_secure_remove --file="/etc/yunohost/apps/$app/config_panel.toml"
fi

if [ -e "/etc/yunohost/apps/$app/scripts/config" ]; then
    ynh_secure_remove --file="/etc/yunohost/apps/$app/scripts/config"
fi

# Remove old dependencies
if [[ ! $standalone ]];
then
    ynh_remove_ruby
    ynh_remove_app_dependencies
fi

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

# Create a dedicated user (if not existing)
ynh_system_user_create --username=$app --home_dir=$final_path

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

ynh_script_progression --message="Upgrading source files..." --weight=1
# Remove all files if the old syncing-server is used
if [[ ! $standalone ]];
then
    ynh_secure_remove --file="$final_path"
    ynh_secure_remove --file="/var/log/$app"
fi

if [[ "$syncing_server_js_version_installed" < "$syncing_server_js_version" ]]
then
    # Backup files to keep
    ynh_backup_if_checksum_is_different --file=$config_syncing_server_js
    ynh_backup_if_checksum_is_different --file=$config_syncing_server_js_worker
    # Remove destination directory
    ynh_secure_remove --file="$final_path/live/syncing_server_js"
    ynh_secure_remove --file="$config_syncing_server_js"
    ynh_secure_remove --file="$config_syncing_server_js_worker"
    # Download, check integrity, uncompress and patch the source from app.src
    mkdir -p "$final_path/live"
    ynh_setup_source --source_id=app_syncing-server-js --dest_dir="$final_path/live/syncing-server-js"
fi

if [[ "$auth_version_installed" < "$auth_version" ]]
then
    # Backup files to keep
    ynh_backup_if_checksum_is_different --file=$config_auth
    ynh_backup_if_checksum_is_different --file=$config_auth_worker
    # Remove destination directory
    ynh_secure_remove --file="$final_path/live/auth"
    ynh_secure_remove --file="$config_auth"
    ynh_secure_remove --file="$config_auth_worker"
    # Download, check integrity, uncompress and patch the source from app.src
    mkdir -p "$final_path/live"
    ynh_setup_source --source_id=app_auth --dest_dir="$final_path/live/auth"
fi

if [[ "$api_gateway_version_installed" < "$api_gateway_version" ]]
then
    # Backup files to keep
    ynh_backup_if_checksum_is_different --file=$config_api_gateway
    # Remove destination directory
    ynh_secure_remove --file="$final_path/live/api_gateway"
    ynh_secure_remove --file="$config_api_gateway"
    # Download, check integrity, uncompress and patch the source from app.src
    mkdir -p "$final_path/live"
    ynh_setup_source --source_id=app_api-gateway --dest_dir="$final_path/live/api-gateway"
fi

if [[ "$extensions_version_installed" < "$extensions_version" ]]
then
    # Remove destination directory
    ynh_secure_remove --file="$final_path_extensions"
    # Download, check integrity, uncompress and patch the source from app.src
    mkdir -p "$final_path_extensions"
    if test -e "../sources/extra_files/extensions"
    then
        cp -a "../sources/extra_files/extensions/." "$final_path_extensions"
    fi

    find "../conf/" -name "ext_*.src" -print0 | while read -d $'\0' file
    do
        basename=$(basename -as .src $file)
        ynh_setup_source  --dest_dir="$final_path_extensions/src/${basename#'ext_'}" --source_id="$basename"
    done
fi

# Copy help file
ynh_secure_remove --file="$final_path_www/help"
mkdir -p "$final_path_www/help"
if test -e "$YNH_APP_BASEDIR/sources/extra_files/help"; then
    cp --archive "$YNH_APP_BASEDIR/sources/extra_files/help/." "$final_path_www/help"
fi
ynh_replace_vars --file="$final_path_www/help/index.html"

chmod 750 "$final_path"
chmod -R o-rwx "$final_path"
chown -R $app:$app "$final_path"

chmod 750 "$final_path_www"
chmod -R o-rwx "$final_path_www"
chown -R "www-data":"www-data" "$final_path_www"

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading nginx web server configuration..." --weight=1

# Create a dedicated nginx config
ynh_add_nginx_config

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

ynh_install_app_dependencies $pkg_dependencies
ynh_install_nodejs --nodejs_version=$NODEJS_VERSION
ynh_install_extra_app_dependencies --repo="deb https://dl.yarnpkg.com/debian/ stable main" --package="yarn" --key="https://dl.yarnpkg.com/debian/pubkey.gpg"


#=================================================
# SPECIFIC UPGRADE
#=================================================
#=================================================
# ADD SWAP
#=================================================
ynh_script_progression --message="Adding swap..."

ynh_add_swap --size=$swap_needed

#=================================================
# MODIFY A CONFIG FILE
#=================================================
ynh_script_progression --message="Modify a config file..."  --weight=2

ynh_add_config --template="env_syncing-server-js.env.sample" --destination="$config_syncing_server_js"
ynh_add_config --template="env_syncing-server-js-worker.env.sample" --destination="$config_syncing_server_js_worker"
ynh_add_config --template="env_auth.env.sample" --destination="$config_auth"
ynh_add_config --template="env_auth-worker.env.sample" --destination="$config_auth_worker"
ynh_add_config --template="env_api-gateway.env.sample" --destination="$config_api_gateway"

#=================================================
# INSTALLING Standard Notes - Syncing Server
#=================================================
if [ "$upgrade_type" == "UPGRADE_APP" ]
then
    ynh_script_progression --message="Installing Standard Notes - Syncing Server..."  --weight=93
    ynh_use_nodejs
    if [[ "$syncing_server_js_version_installed" < "$syncing_server_js_version" ]]
    then
        pushd "$final_path/live/syncing-server-js"
            ynh_exec_as $app env NODE_OPTIONS="--max-old-space-size=4096" PATH=$ynh_node_load_PATH yarn install --pure-lockfile
            ynh_exec_as $app env NODE_OPTIONS="--max-old-space-size=4096" PATH=$ynh_node_load_PATH yarn build
        popd
        ynh_app_setting_set --app=$app --key=syncing_server_js_version --value=$syncing_server_js_version
    fi
    if [[ "$auth_version_installed" < "$auth_version" ]]
    then
        pushd "$final_path/live/auth"
            ynh_exec_as $app env NODE_OPTIONS="--max-old-space-size=4096" PATH=$ynh_node_load_PATH yarn install --pure-lockfile
            ynh_exec_as $app env NODE_OPTIONS="--max-old-space-size=4096" PATH=$ynh_node_load_PATH yarn build
        popd
        ynh_app_setting_set --app=$app --key=auth_version --value=$auth_version
    fi
    if [[ "$api_gateway_version_installed" < "$api_gateway_version" ]]
    then
        pushd "$final_path/live/api-gateway"
            ynh_exec_as $app env NODE_OPTIONS="--max-old-space-size=4096" PATH=$ynh_node_load_PATH yarn install --pure-lockfile
            ynh_exec_as $app env NODE_OPTIONS="--max-old-space-size=4096" PATH=$ynh_node_load_PATH yarn build
        popd
        ynh_app_setting_set --app=$app --key=api_gateway_version --value=$api_gateway_version
    fi
fi

#=================================================
# INSTALLING Standard Notes - Extensions
#=================================================
if [[ "$extensions_version_installed" < "$extensions_version" ]]
then
    ynh_script_progression --message="Installing Standard Notes - Extensions..."  --weight=1

    if [ $path_url = "/" ]
    then
        path=""
    else
        path=$path_url
    fi

    ynh_replace_string --match_string="__DOMAIN__PATH__" --replace_string="$domain$path" --target_file="$final_path_extensions/repo.json"

    find "$final_path_extensions/src/" -name "*.json" -print0 | while read -d $'\0' file
    do
        ynh_replace_string --match_string="__DOMAIN__PATH__" --replace_string="$domain$path" --target_file="$file"
    done
    ynh_app_setting_set --app=$app --key=extensions_version --value=$extensions_version
fi

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Upgrading systemd configuration..." --weight=1

# Create a dedicated systemd config
ynh_add_systemd_config --service="$app-syncing-server-js" --template="systemd_syncing-server-js.service"
ynh_add_systemd_config --service="$app-syncing-server-js-worker" --template="systemd_syncing-server-js-worker.service"
ynh_add_systemd_config --service="$app-auth" --template="systemd_auth.service"
ynh_add_systemd_config --service="$app-auth-worker" --template="systemd_auth-worker.service"
ynh_add_systemd_config --service="$app-api-gateway" --template="systemd_api-gateway.service"

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

# Calculate and store the config file checksum into the app settings
ynh_store_file_checksum --file="$config_syncing_server_js"
ynh_store_file_checksum --file="$config_syncing_server_js_worker"
ynh_store_file_checksum --file="$config_auth"
ynh_store_file_checksum --file="$config_auth_worker"
ynh_store_file_checksum --file="$config_api_gateway"
ynh_store_file_checksum --file="/etc/nginx/conf.d/$domain.d/$app.conf"

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

mkdir -p "/var/log/$app"
chown -R "$app": "/var/log/$app"

# Use logrotate to manage application logfile(s)
ynh_use_logrotate --logfile="/var/log/$app/syncing-server.log"
ynh_use_logrotate --logfile="/var/log/$app/syncing-server-worker.log"
ynh_use_logrotate --logfile="/var/log/$app/auth.log"
ynh_use_logrotate --logfile="/var/log/$app/auth-worker.log"
ynh_use_logrotate --logfile="/var/log/$app/api-gateway.log"

#=================================================
# INTEGRATE SERVICE IN YUNOHOST
#=================================================
ynh_script_progression --message="Integrate $app service in Yunohost..."  --weight=1

yunohost service add "$app-syncing-server-js" --description="Standard Notes - Syncing Server" --log="/var/log/$app/syncing-server-js.log"
yunohost service add "$app-syncing-server-js-worker" --description="Standard Notes - Syncing Server - Worker" --log="/var/log/$app/syncing-server-js-worker.log"
yunohost service add "$app-auth" --description="Standard Notes - Auth" --log="/var/log/$app/auth.log"
yunohost service add "$app-auth-worker" --description="Standard Notes - Auth - Worker" --log="/var/log/$app/auth-worker.log"
yunohost service add "$app-api-gateway" --description="Standard Notes - API Gateway" --log="/var/log/$app/api-gateway.log"

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

# Start a systemd service
ynh_systemd_action \
    --service_name="$app-syncing-server-js" \
    --action="start" \
    --log_path="/var/log/$app/syncing-server-js.log" \
    --line_match='{"message":"Server started on port '$port_syncing_server_js'","level":"info"}'
ynh_systemd_action \
    --service_name="$app-syncing-server-js-worker" \
    --action="start" \
    --log_path="/var/log/$app/syncing-server-js-worker.log" \
    --line_match='{"message":"Starting worker...","level":"info"}'
ynh_systemd_action \
    --service_name="$app-auth" \
    --action="start" \
    --log_path="/var/log/$app/auth.log" \
    --line_match='{"message":"Server started on port '$port_auth'","level":"info"}'
ynh_systemd_action \
    --service_name="$app-auth-worker" \
    --action="start" \
    --log_path="/var/log/$app/auth-worker.log" \
    --line_match='{"message":"Starting worker...","level":"info"}'
ynh_systemd_action \
    --service_name="$app-api-gateway" \
    --action="start" \
    --log_path="/var/log/$app/api-gateway.log" \
    --line_match='{"message":"Server started on port '$port_api_gateway'","level":"info"}'

#=================================================
# SETUP FAIL2BAN
#=================================================
ynh_script_progression --message="Reconfiguring fail2ban..." --weight=1

# Create a dedicated fail2ban config
ynh_add_fail2ban_config --use_template

#=================================================
# RELOAD NGINX
#=================================================
ynh_script_progression --message="Reloading nginx web server..." --weight=1

ynh_systemd_action --service_name=nginx --action=reload

#=================================================
# SEND A README FOR THE ADMIN
#=================================================
ynh_script_progression --message="Sending a readme for the admin..."

admin_panel="https://$(grep portal_domain /etc/ssowat/conf.json | cut -d'"' -f4)/yunohost/admin/#/apps/$app"

echo -e "\
Standard Notes - Syncing Server was successfully upgraded.\n\
Please configure the Standard Notes web app or mobile app to use this syncing server: https://$domain$path_url\n\
\n\
Standard Notes extensions are hosted with this package.\n\
An Help page for setting-up the Standard Notes Server and Extensions have been created under: https://$domain$path_url/help\n\
The Help page is accessible via the Yunohost Portal.\n\
You can deactivate the Help page under: $admin_panel\
" > message

ynh_send_readme_to_admin --app_message="message" --type='upgrade'

#=================================================
# STORE SETTINGS
#=================================================
ynh_app_setting_set --app=$app --key=standalone --value="true"

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

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