#!/bin/bash

#=================================================
# GENERIC START
#=================================================
# 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)
db_name=$(ynh_app_setting_get --app=$app --key=db_name)
db_user=$db_name
final_path=$(ynh_app_setting_get --app=$app --key=final_path)

#=================================================
# REMOVE THE POSTGRESQL DATABASE(S) & ROLE
#=================================================
ynh_script_progression --message="Removing all associated PostgreSQL database(s) and role"

# Remove all existing databases associated with the app's dedicated user a database if it exists
sql="COPY (SELECT datname FROM pg_database JOIN pg_authid ON pg_database.datdba = pg_authid.oid WHERE rolname = '${db_user}') TO STDOUT"
dbs_to_drop=ynh_psql_execute_as_root --sql="$sql" #Fetch database(s) associated to role $db_user

if [[ -n "$dbs_to_drop" ]]; then # Check that the list of database(s) is not empty 
	for $db_name in $dbs_to_drop   # Iterate through the list of database(s) to remove
	do
		if ynh_psql_database_exists --database=$db_name; then # Check if the database exists
			ynh_psql_drop_db $db_name                         # Remove the database
			ynh_print_info --message="Removed database $db_name associated to role $db_user"
		else
			ynh_print_warn --message="Database $db_name not found"
		fi
	done
else 
	ynh_print_warn --message="No associated database to role $db_user was found"
fi

# Remove dedicated PostgreSQL role
if ynh_psql_user_exists --user=$db_user; then
    ynh_psql_drop_user $db_user
	ynh_print_info --message="Removed PostgreSQL role $db_user"
else
    ynh_print_warn --message="User $db_user not found"
fi 

#=================================================
# REMOVE APP MAIN DIR
#=================================================
ynh_script_progression --message="Removing app main directory"

# Remove the app directory securely
ynh_secure_remove --file="$final_path"

#=================================================
# REMOVE NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Removing NGINX web server configuration"

# Remove the dedicated NGINX config
ynh_remove_nginx_config

#=================================================
# REMOVE PHP-FPM CONFIGURATION
#=================================================
ynh_script_progression --message="Removing PHP-FPM configuration"

# Remove the dedicated PHP-FPM config
ynh_remove_fpm_config

#=================================================
# REMOVE DEPENDENCIES
#=================================================
ynh_script_progression --message="Removing dependencies"

# Remove metapackage and its dependencies
ynh_remove_app_dependencies

#=================================================
# REMOVE LOGROTATE CONFIGURATION
#=================================================
ynh_script_progression --message="Removing logrotate configuration"

# Remove the app-specific logrotate config
ynh_remove_logrotate

##=================================================
## GENERIC FINALIZATION
#=================================================
# REMOVE DEDICATED USER
#=================================================
ynh_script_progression --message="Removing the dedicated system user"

# Delete a system user
ynh_system_user_delete --username=$app

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

ynh_script_progression --message="Removal of $app completed"