#!/bin/bash

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

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

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

ynh_clean_setup () {
	ynh_clean_check_starting
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

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

domain=$YNH_APP_ARG_DOMAIN
path_url=$YNH_APP_ARG_PATH
admin=$YNH_APP_ARG_ADMIN
is_public=$YNH_APP_ARG_IS_PUBLIC
language=$YNH_APP_ARG_LANGUAGE
password=$YNH_APP_ARG_PASSWORD

app=$YNH_APP_INSTANCE_NAME

#=================================================
# CHECK IF THE APP CAN BE INSTALLED WITH THESE ARGS
#=================================================
ynh_script_progression --message="Validating installation parameters..." --weight=2

final_path=/var/www/$app
test ! -e "$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=2

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=$app --key=is_public --value=$is_public
ynh_app_setting_set --app=$app --key=language --value=$language
ynh_app_setting_set --app=$app --key=password --value=$password

#=================================================
# STANDARD MODIFICATIONS
#=================================================
# FIND AND OPEN A PORT
#=================================================
ynh_script_progression --message="Configuring firewall..." --weight=1

# Find an available port
port=$(ynh_find_port --port=9001)
ynh_app_setting_set --app=$app --key=port --value=$port

#=================================================
# INSTALL DEPENDENCIES
#=================================================
ynh_script_progression --message="Installing dependencies..." --weight=12

ynh_install_app_dependencies $pkg_dependencies

ynh_install_nodejs --nodejs_version=$nodejs_version

#=================================================
# CREATE A POSTQRESQL DATABASE
#=================================================
ynh_script_progression --message="Creating a PostgreSQL database..." --weight=5

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

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

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=4

# Create a dedicated NGINX config
ynh_add_nginx_config

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Configuring system user..." --weight=4

# Create a system user
ynh_system_user_create --username=$app --home_dir=$final_path

#=================================================
# INSTALL ETHERPAD
#=================================================
ynh_script_progression --message="Installing Etherpad..." --weight=90

chown -R $app: $final_path

pushd "$final_path" || ynh_die
 	ynh_use_nodejs
 	ynh_exec_as $app env "$ynh_node_load_PATH" bin/installDeps.sh
popd || ynh_die

#=================================================
# MODIFY A CONFIG FILE
#=================================================
ynh_script_progression --message="Configuring Etherpad..." --weight=6

cp ../conf/settings.json $final_path/settings.json

ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file="$final_path/settings.json"
ynh_replace_string --match_string="__LANGUAGE__" --replace_string="$language" --target_file="$final_path/settings.json"

cp ../conf/credentials.json $final_path/credentials.json

ynh_replace_string --match_string="__DB_NAME__" --replace_string="$db_name" --target_file="$final_path/credentials.json"
ynh_replace_string --match_string="__DB_PWD__" --replace_string="$db_pwd" --target_file="$final_path/credentials.json"
ynh_replace_string --match_string="__ADMIN__" --replace_string="$admin" --target_file="$final_path/credentials.json"
ynh_replace_string --match_string="__PASSWORD__" --replace_string="$password" --target_file="$final_path/credentials.json"

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

# Calculate and store the config file checksum into the app settings
ynh_store_file_checksum --file="$final_path/settings.json"
ynh_store_file_checksum --file="$final_path/credentials.json"

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

# Set permissions to app files
chown -R $app: $final_path
chmod 600 $final_path/credentials.json

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Configuring a systemd service..." --weight=4

# Create a dedicated systemd config
ynh_add_systemd_config --others_var="ynh_node_load_PATH"

#=================================================
# INTEGRATE SERVICE IN YUNOHOST
#=================================================
ynh_script_progression --message="Integrating service in YunoHost..." --weight=3

yunohost service add $app --description "Etherpad-lite, the collaborative editor." --log "/var/log/$app/$app.log"

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting a systemd service..." --weight=6

# Start a systemd service
ynh_systemd_action --service_name=$app --action="start" --log_path="systemd" --line_match="Your Etherpad version is" 

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

# 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"
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 Etherpad completed" --last