#!/bin/bash

#=================================================
# GENERIC STARTING
#=================================================
# IMPORT GENERIC HELPERS
#=================================================

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

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

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)

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

upgrade_type=$(ynh_check_app_version_changed)

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

# 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 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)..." --weight=2

# 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

#=================================================
# CHECK THE PATH
#=================================================

# Normalize the URL path syntax
path_url=$(ynh_normalize_url_path --path_url=$path_url)

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_script_progression --message="Upgrading dependencies..." --weight=7

ynh_install_app_dependencies $pkg_dependencies

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

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	# Verify the checksum and backup the file if it's different
	ynh_backup_if_checksum_is_different --file="$final_path/searx/settings.yml"

	ynh_script_progression --message="Upgrading source files..." --weight=3

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

    #=================================================
    # PATCH VERSION 0.16.0
    #=================================================

    # Apply fix https://github.com/asciimoo/searx/pull/1831 on the current 0.16.0 release.
    ynh_replace_string --match_string="werkzeug.contrib.fixers" --replace_string="werkzeug.middleware.proxy_fix" --target_file="$final_path/searx/webapp.py"
fi

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

path_no_root=${path_url%/}
# Create a dedicated nginx config
ynh_add_nginx_config "path_no_root"

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

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

#=================================================
# SPECIFIC UPGRADE
#=================================================
# UPGRADE SEARX IN ITS VIRTUALENV
#=================================================
ynh_script_progression --message="Upgrading Searx..." --weight=7

ynh_secure_remove $final_path/lib/python2.7/site-packages/setuptools
for FILE in $final_path/lib/python2.7/site-packages/setuptools-*
do
    ynh_secure_remove $FILE
done

virtualenv --system-site-packages "$final_path"
set +u; source $final_path/bin/activate; set -u
pip install -U setuptools
pip install --requirement $final_path/requirements-ynh.txt --upgrade

#=================================================
# CONFIGURE SEARX
#=================================================
ynh_script_progression --message="Reconfiguring Searx..." --weight=2

# Change instance name
ynh_replace_string --match_string="instance_name : \"searx\"" --replace_string="instance_name : \"YunoSearx\"" --target_file="$final_path/searx/settings.yml"

# Generate a secret key
ynh_replace_string --match_string="secret_key : \"ultrasecretkey\"" --replace_string="secret_key : \"$(ynh_string_random)\"" --target_file="$final_path/searx/settings.yml"

# Modify the base_url parameter
ynh_replace_string --match_string="base_url : False" --replace_string="base_url : https://${domain}${path_url%/}/" --target_file="$final_path/searx/settings.yml"

ynh_store_file_checksum --file="$final_path/searx/settings.yml"

#=================================================
# GENERIC FINALISATION
#=================================================
# SECURING FILES AND DIRECTORIES
#=================================================

chown $app: --recursive "$final_path"

#=================================================
# CONFIGURE UWSGI FOR SEARX
#=================================================
ynh_script_progression --message="Reconfiguring uWSGI for Searx..."

cp ../conf/searx.ini /etc/uwsgi/apps-available/$app.ini
ynh_replace_string --match_string="__APP__" --replace_string="$app" --target_file=/etc/uwsgi/apps-available/$app.ini
ynh_replace_string --match_string="__FINALPATH__" --replace_string="$final_path" --target_file=/etc/uwsgi/apps-available/$app.ini

#=================================================
# CHECK SEARX STARTING
#=================================================
ynh_script_progression --message="Restarting Searx..." --weight=3

# Wait for searx to be fully started
ynh_systemd_action --service_name=uwsgi --action=restart --line_match="spawned uWSGI master process" --log_path="/var/log/uwsgi/app/$app.log"

#=================================================
# SETUP SSOWAT
#=================================================
ynh_script_progression --message="Upgrading SSOwat configuration..."

# Make app public if necessary
if [ $is_public -eq 1 ]
then
	ynh_app_setting_set --app=$app --key=skipped_uris --value="/"
fi

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

ynh_systemd_action --service_name=nginx --action=reload

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

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