#!/bin/bash

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

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

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

ynh_clean_setup () {
	### Remove this function if there's nothing to clean before calling the remove script.
	true
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# RETRIEVE ARGUMENTS FROM THE MANIFEST
#=================================================

domain=$YNH_APP_ARG_DOMAIN
path_url="/"
admin=$YNH_APP_ARG_ADMIN
is_public=$YNH_APP_ARG_IS_PUBLIC
admin_email=$(ynh_user_get_info --username=$admin --key="mail")
secret_key=$(ynh_string_random --length=64)
staff_token=$(ynh_string_random --length=64)

### If it's a multi-instance app, meaning it can be installed several times independently
### The id of the app as stated in the manifest is available as $YNH_APP_ID
### The instance number is available as $YNH_APP_INSTANCE_NUMBER (equals "1", "2"...)
### The app instance name is available as $YNH_APP_INSTANCE_NAME
###    - the first time the app is installed, YNH_APP_INSTANCE_NAME = ynhexample
###    - the second time the app is installed, YNH_APP_INSTANCE_NAME = ynhexample__2
###    - ynhexample__{N} for the subsequent installations, with N=3,4...
### The app instance name is probably what interests you most, since this is
### guaranteed to be unique. This is a good unique identifier to define installation path,
### db names...
app=$YNH_APP_INSTANCE_NAME

#=================================================
# CHECK IF THE APP CAN BE INSTALLED WITH THESE ARGS
#=================================================
### About --weight and --time
### ynh_script_progression will show to your final users the progression of each scripts.
### In order to do that, --weight will represent the relative time of execution compared to the other steps in the script.
### is a packager option, it will show you the execution time since the previous call.
### This option should be removed before releasing your app.
### Use the execution time, given by --time, to estimate the weight of a step.
### A common way to do it is to set a weight equal to the execution time in second +1.
### The execution time is given for the duration since the previous call. So the weight should be applied to this previous call.
ynh_script_progression --message="Validating installation parameters..." --weight=1

### If the app uses NGINX as web server (written in HTML/PHP in most cases), the final path should be "/var/www/$app".
### If the app provides an internal web server (or uses another application server such as uWSGI), the final path should be "/opt/yunohost/$app"
final_path=/opt/yunohost/$app
test ! -e "$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

#=================================================
# STORE SETTINGS FROM MANIFEST
#=================================================
ynh_script_progression --message="Storing installation settings..." --weight=1

ynh_app_setting_set --app=$app --key=domain --value=$domain
ynh_app_setting_set --app=$app --key=path --value=$path_url
ynh_app_setting_set --app=$app --key=admin --value=$admin
ynh_app_setting_set --app=$app --key=admin_email --value=$admin_email
ynh_app_setting_set --app=$app --key=random_key --value=$secret_key

#=================================================
# STANDARD MODIFICATIONS
#=================================================
# INSTALL DEPENDENCIES
#=================================================
ynh_script_progression --message="Installing dependencies..." --weight=3

### `ynh_install_app_dependencies` allows you to add any "apt" dependencies to the package.
### Those deb packages will be installed as dependencies of this package.
### If you're not using this helper:
###		- Remove the section "REMOVE DEPENDENCIES" in the remove script
###		- Remove the variable "pkg_dependencies" in _common.sh
###		- As well as the section "REINSTALL DEPENDENCIES" in the restore script
###		- And the section "UPGRADE DEPENDENCIES" in the upgrade script

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=$db_name
db_pwd=$(ynh_string_random --length=30)
ynh_app_setting_set --app=$app --key=db_name --value=$db_name
ynh_app_setting_set --app=$app --key=db_pwd --value=$db_pwd
ynh_psql_test_if_first_run
ynh_psql_setup_db --db_user=$db_user --db_name=$db_name --db_pwd=$db_pwd
ynh_psql_execute_as_root --sql="ALTER ROLE $db_user SET statement_timeout = 5000;" --database=$db_name

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================
ynh_script_progression --message="Setting up source files..." --weight=1

### `ynh_setup_source` is used to install an app from a zip or tar.gz file,
### downloaded from an upstream source, like a git repository.
### `ynh_setup_source` use the file conf/app.src

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

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Configuring NGINX web server..." --weight=1

### `ynh_add_nginx_config` will use the file conf/nginx.conf

# Create a dedicated NGINX config
ynh_add_nginx_config

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Configuring system user..." --weight=1

# Create a q user
ynh_system_user_create --username=$app

#=================================================
# SPECIFIC SETUP
#=================================================
# CREATE THE DATA DIRECTORY
#=================================================
ynh_script_progression --message="Creating the data directory..."

# Define app's data directory
datadir="/home/yunohost.app/${app}"
mkdir $datadir

ynh_app_setting_set --app=$app --key=datadir --value="$datadir"

# Give permission to the datadir
chown -R "$app":"$app" "$datadir"


ynh_app_setting_set --app=$app --key=datadir --value="$datadir"

#=================================================
# ENVDIR CONFIGURATION
#=================================================
ynh_script_progression --message="Setting up envdir..." --weight=1


env_path=$final_path/envs/prod

mkdir -p  $env_path

echo "$admin <$admin_email>" > $env_path/ADMINS
echo "None" > $env_path/BROKER_POOL_LIMIT
echo "redis://localhost:6379" > $env_path/BROKER_URL
echo "postgres://$db_user:$db_pwd@localhost:5432/$db_name" > $env_path/DATABASE_URL
echo False > $env_path/DEBUG
echo $domain > $env_path/DEFAULT_BASE_URL
echo "$app@$domain" > $env_path/DEFAULT_FROM_EMAIL
echo "django.core.mail.backends.console.EmailBackend" > $env_path/EMAIL_BACKEND
echo "$datadir" > $env_path/MEDIA_ROOT
echo $secret_key > $env_path/SECRET_KEY
echo "$app@$domain" > $env_path/SERVER_EMAIL
echo $staff_token > $env_path/STAFF_TOKEN

#=================================================
# SET UP VIRTUALENV
#=================================================
ynh_script_progression --message="Initializing Python virtualenv..." --weight=20

pushd $final_path || ynh_die
	python3 -m venv $final_path/venv
	source $final_path/venv/bin/activate
	python3 -m pip install -U wheel pip setuptools
	python3 -m pip install --requirement  $final_path/requirements.txt
	python3 -m pip install --requirement  $final_path/requirements-setup.txt
	deactivate 'dummy_arg'
popd || ynh_die

#=================================================
# INITIALIZE DATABASE
#=================================================
pushd $final_path || ynh_die
	source $final_path/venv/bin/activate
	envdir $env_path python3 $final_path/manage.py makemigrations
	envdir $env_path python3 $final_path/manage.py migrate
	deactivate 'dummy_arg'
popd || ynh_die

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Configuring systemd services..." --weight=1

### `ynh_systemd_config` is used to configure a systemd script for an app.
### It can be used for apps that use sysvinit (with adaptation) or systemd.
### Have a look at the app to be sure this app needs a systemd script.
### `ynh_systemd_config` will use the file conf/systemd.service
### If you're not using these lines:
###		- You can remove those files in conf/.
###		- Remove the section "BACKUP SYSTEMD" in the backup script
###		- Remove also the section "STOP AND REMOVE SERVICE" in the remove script
###		- As well as the section "RESTORE SYSTEMD" in the restore script
###		- And the section "SETUP SYSTEMD" in the upgrade script

# Create a dedicated systemd config
ynh_add_systemd_config
ynh_add_systemd_config --service="$app-socket" --template systemd.socket
ynh_add_systemd_config --service="$app-celery" --template systemd-celery.service
ynh_add_systemd_config --service="$app-beat" --template systemd-beat.service
systemctl disable "$app-socket.service" --quiet
mv "/etc/systemd/system/$app-socket.service" "/etc/systemd/system/$app.socket"
systemctl daemon-reload --quiet

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

### For security reason, any app should set the permissions to root: before anything else.
### Then, if write authorization is needed, any access should be given only to directories
### that really need such authorization.

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

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

### `yunohost service add` integrates a service in YunoHost. It then gets 
### displayed in the admin interface and through the others `yunohost service` commands.
### (N.B.: this line only makes sense if the app adds a service to the system!)
### If you're not using these lines:
###		- You can remove these files in conf/.
###		- Remove the section "REMOVE SERVICE INTEGRATION IN YUNOHOST" in the remove script
###		- As well as the section "INTEGRATE SERVICE IN YUNOHOST" in the restore script
###		- And the section "INTEGRATE SERVICE IN YUNOHOST" in the upgrade script

yunohost service add $app --description="Manage podcast subscriptions, and sync them between apps and devices" --log="/var/log/$app/$app.log"

### Additional options starting with 3.8:
###
### --needs_exposed_ports "$port" a list of ports that needs to be publicly exposed
###                               which will then be checked by YunoHost's diagnosis system
###                               (N.B. DO NOT USE THIS is the port is only internal!!!)
###
### --test_status "some command"  a custom command to check the status of the service
###                               (only relevant if 'systemctl status' doesn't do a good job)
###
### --test_conf "some command"    some command similar to "nginx -t" that validates the conf of the service
###
### Re-calling 'yunohost service add' during the upgrade script is the right way
### to proceed if you later realize that you need to enable some flags that
### weren't enabled on old installs (be careful it'll override the existing
### service though so you should re-provide all relevant flags when doing so)

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

### `ynh_systemd_action` is used to start systemd services for an app.
### Only needed if you have configure systemd services
### If you're not using these lines:
###		- Remove the section "STOP SYSTEMD SERVICE" and "START SYSTEMD SERVICE" in the backup script
###		- As well as the section "START SYSTEMD SERVICE" in the restore script
###		- As well as the section"STOP SYSTEMD SERVICE" and "START SYSTEMD SERVICE" in the upgrade script
###		- And the section "STOP SYSTEMD SERVICE" and "START SYSTEMD SERVICE" in the change_url script

# Start systemd services
ynh_systemd_action --service_name=$app-celery --action="start" --log_path="/var/log/$app/$app.log"
ynh_systemd_action --service_name=$app-beat --action="start" --log_path="/var/log/$app/$app.log"
ynh_systemd_action --service_name=$app.socket --action="start" --log_path="/var/log/$app/$app.log"

#=================================================
# SETUP SSOWAT
#=================================================
ynh_script_progression --message="Configuring permissions..." --weight=1

# Everyone can access to the api part
# We don't want to display the tile in the sso so we put --show_tile="false"
# And we don't want that the YunoHost Admin can remove visitors group to this permission, so we put --protected="true"
ynh_permission_create --permission="api" --url="/api" -A "/clientconfig.json" "/subscriptions" "/suggestions"  --allowed="visitors" --show_tile="false" --protected="true"
ynh_permission_create --permission="api-noauth" --url="/toplist" -A "/api/2/data" "/api/2/tag" "/api/2/tags" "/search.opml" "/search.json" "/search.jsonp" "/search.txt" "/search.xml" "/toplist.opml"  --show_tile="false"
ynh_permission_create --permission="api-lists" --url="/api/2/lists"  --show_tile="false"


# Make app public if necessary
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"
	ynh_permission_update --permission="api-noauth" --add="visitors"
	ynh_permission_update --permission="api-lists" --add="visitors"
fi

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

ynh_systemd_action --service_name=nginx --action=reload

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

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