#!/bin/bash

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

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

#=================================================
# MANAGE SCRIPT FAILURE
#=================================================

# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# CHECK IF THE APP CAN BE INSTALLED WITH THESE ARGS
#=================================================
ynh_script_progression --message="Validating installation parameters..."

# Path for e.g. "static" files, served by nginx:
test ! -e "$public_path" || ynh_die --message="This path already contains a folder"

# Path for own config files, e.g.: Django's settings.py:
test ! -e "$final_path" || ynh_die --message="This path already contains a folder"

# Register (book) web path
ynh_webpath_register --app="$app" --domain="$domain" --path_url="$path_url"

mkdir -p "$public_path/media" "$public_path/static"
mkdir -p "$final_path"

mkdir -p "$log_path"
touch "${log_file}"

#=================================================
# STORE SETTINGS FROM MANIFEST
#=================================================
ynh_script_progression --message="Storing installation settings..."

ynh_app_setting_set --app="$app" --key=admin --value="$admin"
ynh_app_setting_set --app="$app" --key=public_path --value="$public_path"
ynh_app_setting_set --app="$app" --key=final_path --value="$final_path"
ynh_app_setting_set --app="$app" --key=log_path --value="$log_file"

ynh_app_setting_set --app="$app" --key=domain --value="$domain"
ynh_app_setting_set --app="$app" --key=path --value="$path_url"

# Find a free port
port=$(ynh_find_port --port=8000)
# Set port as application setting
# https://yunohost.org/en/contribute/packaging_apps/helpers
# https://github.com/YunoHost/yunohost/blob/dev/helpers/setting
ynh_app_setting_set --app="$app" --key=port --value="$port"

db_pwd=$(ynh_app_setting_get --app="$app" --key=psqlpwd)

redis_db=$(ynh_redis_get_free_db)
ynh_app_setting_set --app="$app" --key=redis_db --value="$redis_db"

#-------------------------------------------------
# config_panel.toml settings:

ynh_app_setting_set --app="$app" --key=debug_enabled --value="$debug_enabled"
ynh_app_setting_set --app="$app" --key=log_level --value="$log_level"
ynh_app_setting_set --app="$app" --key=admin_email --value="$admin_email"
ynh_app_setting_set --app="$app" --key=default_from_email --value="$default_from_email"

#=================================================
# STANDARD MODIFICATIONS
#=================================================
# INSTALL DEPENDENCIES
#=================================================
ynh_script_progression --message="Installing $app dependencies..." --weight=20

ynh_exec_warn_less ynh_install_app_dependencies "$pkg_dependencies"

#=================================================
# CREATE A PostgreSQL DATABASE
#=================================================
ynh_script_progression --message="Creating a PostgreSQL database..."

db_name=$(ynh_sanitize_dbid --db_name="$app")
db_user=$db_name
ynh_app_setting_set --app="$app" --key=db_name --value="$db_name"

ynh_psql_test_if_first_run

# Initialize database and store postgres password for upgrade
ynh_psql_setup_db --db_user="$db_user" --db_name="$db_name"

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

# Create a dedicated nginx config
# https://yunohost.org/en/contribute/packaging_apps/helpers
# https://github.com/YunoHost/yunohost/blob/dev/helpers/nginx
ynh_add_nginx_config "public_path" "port"

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Configuring system user '$app'..."

# A home directory for venv and settings etc.
ynh_system_user_create --username="$app" --home_dir="$final_path" --use_shell

#=================================================
# PYTHON VIRTUALENV
#=================================================
ynh_script_progression --message="Create Python virtualenv..." --weight=5

# Always recreate everything fresh with current python version
ynh_secure_remove "${final_path}/venv"

# Skip pip because of: https://github.com/YunoHost/issues/issues/1960
python3 -m venv --without-pip "${final_path}/venv"

cp ../conf/requirements.txt "$final_path/requirements.txt"
chown -R "$app:" "$final_path"

#=================================================
# PIP INSTALLATION
#=================================================
ynh_script_progression --message="Install project via pip..." --weight=45

#run source in a 'sub shell'
(
	set +o nounset
	source "${final_path}/venv/bin/activate"
	set -o nounset
	ynh_exec_as $app $final_path/venv/bin/python3 -m ensurepip
	ynh_exec_as $app $final_path/venv/bin/pip3 install --upgrade wheel pip setuptools
	ynh_exec_as $app $final_path/venv/bin/pip3 install --no-deps -r "$final_path/requirements.txt"
)

#=================================================
# copy config files
# ================================================
ynh_script_progression --message="Create $app configuration files..."

ynh_add_config --template="gunicorn.conf.py" --destination="$final_path/gunicorn.conf.py"

ynh_add_config --template="manage.py" --destination="$final_path/manage.py"
chmod +x "$final_path/manage.py"

ynh_add_config --template="settings.py" --destination="$final_path/settings.py"
ynh_add_config --template="setup_user.py" --destination="$final_path/setup_user.py"
ynh_add_config --template="urls.py" --destination="$final_path/urls.py"
ynh_add_config --template="wsgi.py" --destination="$final_path/wsgi.py"

touch "$final_path/local_settings.py"

#=================================================
# MIGRATE / COLLECTSTATIC / CREATEADMIN
#=================================================
ynh_script_progression --message="migrate/collectstatic/createadmin..." --weight=10

cd "$final_path" || exit

# Just for debugging:
./manage.py diffsettings

./manage.py migrate --no-input
./manage.py collectstatic --no-input

# Create/update Django superuser (set unusable password, because auth done via SSOwat):
./manage.py create_superuser --username="$admin" --email="$(ynh_user_get_info "$admin" mail)"

# Check the configuration
# This may fail in some cases with errors, etc., but the app works and the user can fix issues later.
./manage.py check --deploy || true


#=================================================
# SETUP LOGROTATE
#=================================================
ynh_script_progression --message="Configuring log rotation..."

# Use logrotate to manage app-specific logfile(s)
ynh_use_logrotate "$log_file"

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

yunohost service add $app --description="$app service" --log="${log_file}"

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

# Set permissions to app files
chown -R "$app:" "$log_path"
chown -R "$app:www-data" "$public_path"
chown -R "$app:" "$final_path"

chmod o-rwx "$log_path"
chmod o-rwx "$public_path"
chmod o-rwx "$final_path"

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Configuring systemd service '$app'..." --weight=5

# https://yunohost.org/en/contribute/packaging_apps/helpers
# https://github.com/YunoHost/yunohost/blob/dev/helpers/systemd
ynh_add_systemd_config --service="$app" --template="systemd.service"

#=================================================
# SETUP SSOWAT
#=================================================
ynh_script_progression --message="Configuring SSOwat..."

# Make app public if necessary or protect it
if [ $is_public -eq 1 ]
then
	# Everyone can access the app.
	# The "main" permission is automatically created before the install script.
	ynh_permission_update --permission "main" --add "visitors"
fi

#=================================================
# Start the app server via systemd
#=================================================
ynh_script_progression --message="Starting systemd service '$app'..." --weight=5

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

#=================================================
# 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="Installation of $app completed" --last