#!/bin/bash

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

source _common.sh
source ynh_install_ruby
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)
is_public=$(ynh_app_setting_get --app=$app --key=is_public)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
db_name=$(ynh_app_setting_get --app=$app --key=db_name)
db_user=$db_name
db_pwd=$(ynh_app_setting_get --app=$app --key=mysqlpwd)
port=$(ynh_app_setting_get --app=$app --key=port)
install_extensions=$(ynh_app_setting_get --app=$app --key=install_extensions)
access_domain=$(ynh_app_setting_get --app=$app --key=access_domain)

#=================================================
# 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..." --weight=1

# Fix is_public as a boolean value
if [ "$is_public" = "Yes" ]; then
    ynh_app_setting_set --app=$app --key=is_public --value=1
    is_public=1
elif [ "$is_public" = "No" ]; then
    ynh_app_setting_set --app=$app --key=is_public --value=0
    is_public=0
fi

# 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 "$final_path" ]; then
    final_path=/opt/yunohost/$app
    ynh_app_setting_set --app=$app --key=final_path --value=$final_path
fi

# If install_extensions doesn't exist, create it
if [ -z "$install_extensions" ]; then
    install_extensions=0
    ynh_app_setting_set --app=$app --key=install_extensions --value=$install_extensions
fi

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

if [[ ! -d "$final_path/live/public/extensions/" || \
      ! -d "$final_path/live/public/extensions/src/" ]]
then
    if test -e "$../sources/extra_files/app"
    then
        cp -a $../sources/extra_files/app/. "$final_path/"
    fi
fi

#=================================================
# 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

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..." --weight=1

    # Backup files to keep
    tmpdir=$(mktemp -d)
    if [ -d $final_path/live/log ] ; then
        cp -Rp $final_path/live/log $tmpdir
    fi
    # Remove destination directory
    ynh_secure_remove --file=$final_path
    # Download, check integrity, uncompress and patch the source from app.src
    mkdir -p $final_path
    ynh_setup_source --dest_dir="$final_path/live"
    if [ -d $tmpdir/log ] ; then
        cp -Rp $tmpdir/log $final_path/live
    fi
fi

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

# Create a dedicated nginx config
ynh_add_nginx_config "\
    port \
    access_domain \
    "

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

ynh_install_app_dependencies $pkg_dependencies

#=================================================
# INSTALL RUBY
#=================================================
ynh_script_progression --message="Installing Ruby...( This may take a while... )" --weight=100 #331

ynh_install_ruby --ruby_version=$RUBY_VERSION
/opt/rbenv/versions/$RUBY_VERSION/bin/gem update --system --no-document

#=================================================
# 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

#=================================================
# SPECIFIC UPGRADE
#=================================================
#=================================================
# MODIFY A CONFIG FILE
#=================================================
config_file="$final_path/live/.env"
if [ "$upgrade_type" == "UPGRADE_APP" ]
then
    ynh_script_progression --message="Modifying a config file..."  --weight=2

    cp -f ../conf/env.sample $config_file
    ynh_replace_string --match_string="EXPOSED_PORT=3000" --replace_string="EXPOSED_PORT=$port" --target_file="$config_file"
    secret_key=$(ynh_string_random --length=48 | base64)
    ynh_replace_string --match_string="SECRET_KEY_BASE=changeme123" --replace_string="SECRET_KEY_BASE=$secret_key" --target_file="$config_file"
    pseudo_key=$(ynh_string_random --length=48 | base64)
    ynh_replace_string --match_string="PSEUDO_KEY_PARAMS_KEY=changeme456" --replace_string="PSEUDO_KEY_PARAMS_KEY=$pseudo_key" --target_file="$config_file"
    ynh_replace_string --match_string="RAILS_ENV=development" --replace_string="RAILS_ENV=production" --target_file="$config_file"
    ynh_replace_string --match_string="DB_DATABASE=standard_notes_db" --replace_string="DB_DATABASE=$db_name" --target_file="$config_file"
    ynh_replace_string --match_string="DB_USERNAME=std_notes_user" --replace_string="DB_USERNAME=$db_user" --target_file="$config_file"
    ynh_replace_string --match_string="DB_PASSWORD=changeme123" --replace_string="DB_PASSWORD=$db_pwd" --target_file="$config_file"
    ynh_replace_string --match_string="RAILS_RELATIVE_URL_ROOT=/" --replace_string="RAILS_RELATIVE_URL_ROOT=$path_url" --target_file="$config_file"
fi
#=================================================
# INSTALLING Standard Notes - Synicing Server 
#=================================================
if [ "$upgrade_type" == "UPGRADE_APP" ]
then
    ynh_script_progression --message="Installing Standard Notes - Synicing Server..."  --weight=93

    chown -R "$app": "$final_path"

    pushd "$final_path/live"
        exec_as "$app" env PATH=$PATH /opt/rbenv/versions/$RUBY_VERSION/bin/bundle config set path 'vendor/bundle'
        exec_as "$app" env PATH=$PATH /opt/rbenv/versions/$RUBY_VERSION/bin/bundle config set with 'development'
        exec_as "$app" env PATH=$PATH /opt/rbenv/versions/$RUBY_VERSION/bin/bundle install
        exec_as "$app" env PATH=$PATH RAILS_ENV=production /opt/rbenv/versions/$RUBY_VERSION/bin/bundle exec rails db:create db:migrate --quiet
#        exec_as "$app" env PATH=$PATH RAILS_ENV=production /opt/rbenv/versions/$RUBY_VERSION/bin/bundle exec rails assets:precompile --quiet
    popd
fi

#=================================================
# INSTALLING Standard Notes - Extensions
#=================================================
if [ $install_extensions -eq 1 ]
then
    ynh_script_progression --message="Reinstalling Standard Notes - Extensions..."  --weight=1

    ynh_replace_string --match_string="^RAILS_SERVE_STATIC_FILES=.*$" --replace_string="RAILS_SERVE_STATIC_FILES=true" --target_file="$config_file"

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

    find "$final_path/live/public/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

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

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

# Create a dedicated systemd config
ynh_add_systemd_config --others_var="\
    port \
    RUBY_VERSION \
"

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

# Calculate and store the config file checksum into the app settings
ynh_store_file_checksum --file="$config_file"
ynh_store_file_checksum --file="/etc/nginx/conf.d/$domain.d/$app.conf"

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

# Set permissions to app files
chown -R root: $final_path
chown $app: $final_path
mkdir -p "$final_path/live/log"
chown -R $app: "$final_path/live/log/"
mkdir -p "$final_path/live/tmp"
chown -R $app: "$final_path/live/tmp/"

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

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

# Use logrotate to manage application logfile(s)
ynh_use_logrotate --logfile="$final_path/live/log/production.log"
ynh_use_logrotate --logfile="/var/log/$app/$app.log"

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

yunohost service add $app --description "Standard Notes - Syncing Server" --log "/var/log/$app/$app.log"

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

# Create a dedicated fail2ban config
touch "/var/log/$app/$app.log"
ynh_add_fail2ban_config --use_template --others_var="\
    domain \
    path_url \
    "

#=================================================
# SETUP SSOWAT
#=================================================
ynh_script_progression --message="Upgrading SSOwat configuration..." --weight=1
# Make app public if necessary or protect it
if [ $is_public -eq 1 ]
then
    # Create the visitors permission if needed
    if ! ynh_permission_exists --permission "main"; then
        ynh_permission_create --permission "main" --allowed "visitors"
    fi
fi

#=================================================
# 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"
sleep 15

#=================================================
# 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..."

message_extensions="To install extensions open this page: https://$domain$path_url/extensions/\n\
If you want to change the url of the syncing server all extensions from here have to be reinstalled be the users."
message_no_extensions="You have no extensions installed.\n\
You can configure this app by using the config-panel"

admin_panel="https://$(grep portal_domain /etc/ssowat/conf.json | cut -d'"' -f4)/yunohost/admin/#/apps/$app"
action="You can find some specific actions for this app by using the experimental __URL_TAG1__action feature__URL_TAG2__$admin_panel/actions__URL_TAG3__"
config_panel="You can find some specific configurations for this app by using the experimental __URL_TAG1__config-panel feature__URL_TAG2__$admin_panel/config-panel__URL_TAG3__"

ynh_replace_string --match_string="__TYPE__" --replace_string="installed" --target_file="../conf/message"
ynh_replace_string --match_string="__DOMAIN__" --replace_string="$domain" --target_file="../conf/message"
ynh_replace_string --match_string="__PATH_URL__" --replace_string="$path_url" --target_file="../conf/message"

if [ $install_extensions -eq 1 ]
then
    ynh_replace_string --match_string="__EXTENSIONS__" --replace_string="$message_extensions" --target_file="../conf/message"
else
    ynh_replace_string --match_string="__EXTENSIONS__" --replace_string="$message_no_extensions" --target_file="../conf/message"
fi
ynh_replace_string --match_string="__ACTION__" --replace_string="$action" --target_file="../conf/message"
ynh_replace_string --match_string="__CONFIG_PANEL__" --replace_string="$config_panel" --target_file="../conf/message"

ynh_send_readme_to_admin --app_message="../conf/message" --type='upgrade'

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

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