#! /usr/bin/env bash



# Function to generate passwords
#
	function generate_password
	{
		# base64 alphabet is alphanumeric characters and "+", "/", "="
		# https://en.wikipedia.org/wiki/Base64#Base64_table_from_RFC_4648
		# we could delete them 'tr -d "+/="', but that would randomly shorten the string
		echo $(openssl rand -base64 32 | tr "/" "_" );
	}



# This script is used to create a new environment for the project.
#
	ENV_FILE_DOCKER=./srcs/.env
	ENV_FILE_NESTJS=./srcs/requirements/nestjs/api_back/.env
	# Check for existing .env
	if [ -f "$ENV_FILE_DOCKER" ] && [ -f "$ENV_FILE_NESTJS" ]; then
		echo "The file $ENV_FILE_DOCKER and $ENV_FILE_NESTJS already exists. Do you want to overwrite them ? (y/n)"
		OVERWRITE=""
		# Ask to overwrite the .env files
		while [ "$OVERWRITE" != "y" ] && [ "$OVERWRITE" != "n" ]; do
			read -p "Enter your choice : " OVERWRITE
		done
		if [ "$OVERWRITE" = "y" ]; then
			rm "$ENV_FILE_DOCKER" && rm "$ENV_FILE_NESTJS"
			docker rmi -f postgres
		else
			echo "The file $ENV_FILE_DOCKER and $ENV_FILE_NESTJS will not be overwritten. The script will exit."
			exit 0
		fi
	fi



# Create a new environment for docker
#
	echo "Creating a new environment for docker"
	NODE_ENV=""
	# Ask if dev or prod environment
	while [ "$NODE_ENV" != "1" ] && [ "$NODE_ENV" != "2" ]; do
		read -p "Enter the env configuration for nestjs : \"1\" for development OR \"2\" for production : " NODE_ENV
	done
	if [ "$NODE_ENV" = "1" ]; then
		echo "NODE_ENV=development"								> "$ENV_FILE_DOCKER"
	else
		echo "NODE_ENV=production"								> "$ENV_FILE_DOCKER"
	fi
	# Env variables
	read -p "Enter the name of the host like \"localhost\" : " PROJECT_HOST
	echo "WEBSITE_HOST=$PROJECT_HOST"							>> "$ENV_FILE_DOCKER"
	echo "WEBSITE_PORT=8080"									>> "$ENV_FILE_DOCKER"
	echo "POSTGRES_USER=postgres"								>> "$ENV_FILE_DOCKER"
	echo "#if change postgres pswd, do make destroy"			>> "$ENV_FILE_DOCKER"
	echo "POSTGRES_PASSWORD=$(generate_password)"				>> "$ENV_FILE_DOCKER"
	echo "POSTGRES_DB=transcendance_db"							>> "$ENV_FILE_DOCKER"
	echo "POSTGRES_HOST=postgresql"								>> "$ENV_FILE_DOCKER"
	echo "POSTGRES_PORT=5432"									>> "$ENV_FILE_DOCKER"
	echo "REDIS_HOST=redis"										>> "$ENV_FILE_DOCKER"
	echo "REDIS_PORT=6379"										>> "$ENV_FILE_DOCKER"
	echo "REDIS_PASSWORD=$(generate_password)"					>> "$ENV_FILE_DOCKER"



# Create a new environment for nestjs
#
	echo "Creating a new environment for nestjs"
	echo "NODE_ENV=\$NODE_ENV"									> "$ENV_FILE_NESTJS"
	echo "WEBSITE_HOST=\$WEBSITE_HOST"							>> "$ENV_FILE_NESTJS"
	echo "WEBSITE_PORT=\$WEBSITE_PORT"							>> "$ENV_FILE_NESTJS"
	echo "POSTGRES_USER=\$POSTGRES_USER"						>> "$ENV_FILE_NESTJS"
	echo "POSTGRES_PASSWORD=\$POSTGRES_PASSWORD"				>> "$ENV_FILE_NESTJS"
	echo "POSTGRES_DB=\$POSTGRES_DB"							>> "$ENV_FILE_NESTJS"
	echo "POSTGRES_HOST=\$POSTGRES_HOST"						>> "$ENV_FILE_NESTJS"
	echo "POSTGRES_PORT=\$POSTGRES_PORT"						>> "$ENV_FILE_NESTJS"
	# Connection to 42
	echo "In the next steps, we'll need to enter the client secret and client id of the 42 api"
	read -p "Enter the client id of the 42 api : " CLIENT_ID
	echo "FORTYTWO_CLIENT_ID=$CLIENT_ID"						>> "$ENV_FILE_NESTJS"
	read -p "Enter the client secret of the 42 api : " CLIENT_SECRET
	echo "FORTYTWO_CLIENT_SECRET=$CLIENT_SECRET"				>> "$ENV_FILE_NESTJS"
	FT_CALLBACK="http://\$WEBSITE_HOST:\$WEBSITE_PORT/api/v2/auth/redirect"
	echo "FORTYTWO_CALLBACK_URL=$FT_CALLBACK"					>> "$ENV_FILE_NESTJS"
	# Other configs
	echo "COOKIE_SECRET=$(generate_password)"					>> "$ENV_FILE_NESTJS"
	echo "PORT=3000" 											>> "$ENV_FILE_NESTJS"
	echo "TWO_FACTOR_AUTHENTICATION_APP_NAME=Transcendance"		>> "$ENV_FILE_NESTJS"
	echo "TICKET_FOR_PLAYING_GAME_SECRET=$(generate_password)"	>> "$ENV_FILE_NESTJS"


# it's finished !
#
	echo "The environment has been created successfully. You can now wait for the docker to build the project."