#!/bin/bash

# Get the current working directory
cwd=$(pwd)

echo_err() {
	echo "!! -> $1"
}

# Bail out from an error with a message asking the user to report the incident
exit_report() {
	echo_err "Please report this error at: https://codeberg.org/vlw/href/issues"
	exit 1
}

# Make sure we have all the system packages we need to proceed with the installation
check_sys_depend() {
	local valid=true
	local packages=("git" "composer" "curl")

	for package in "${packages[@]}" ; do
		if ! dpkg -l | grep -qw "ii  ${package}" ; then
			echo_err "Package '${package}' is not installed."
			valid=false
		fi
	done

	# Bail out if any required package is missing
	if [ "$valid" = false ] ; then
		exit 1
	fi
}

install_reflect() {
	echo ""
	echo "First we're going to install the Reflect API framework."
	echo ""

	curl -sSL https://href.vlw.se/reflect/install | bash
	if [ $? -ne 0 ] ; then
		echo_err "Failed to run Reflect install script"
		exit_report
	fi
}

configure_href() {
	if ! [ -f "reflect/.env.ini" ] ; then
		echo_err "Reflect is not installed correctly."
		exit_report
	fi

	local reflect_port=80

	# A configuration file already exists
	if [ -f ".env.ini" ] ; then
		echo "A configuration file already exists at: ${cwd}/.env.ini"
		read -p "Do you want to overwrite this file? (y/n): " choice </dev/tty

		# Check the user's response
		if [[ "$choice" == "y" || "$choice" == "Y" ]] ; then
			echo "Removing existing configuration and proceeding with the installation in ${cwd}..."
			rm .env.ini
		else
			echo "Installation aborted."
			exit 1
		fi
	fi

	echo ""
	echo "Next we're going to configure the HREF database."
	echo "You can use the same database as Reflect here if you want."
	echo ""

	# Prompt the user for database credentials
	echo "Database configuration."
	read -p "Enter the full hostname of your HREF MySQL/MariaDB server: " db_host </dev/tty
	read -p "Enter the username for your HREF MySQL/MariaDB server: " db_user </dev/tty
	read -p "Enter the password for your HREF MySQL/MariaDB server: " db_pass </dev/tty
	read -p "Enter the database name that HREF should use: " db_db </dev/tty

	echo ""
	echo "Almost there..."
	echo ""
	read -p "Is the Reflect instance running on port 80? (y/n): " choice </dev/tty

	# Check the user's response
	if [[ "$choice" == "n" || "$choice" == "N" ]] ; then
		read -p "Enter the port number: " reflect_port </dev/tty
	fi

	local api_key_read=$(< /dev/urandom tr -dc 'A-Za-z0-9' | head -c 64)
	local api_key_admin=$(< /dev/urandom tr -dc 'A-Za-z0-9' | head -c 64)

	local config=(
		"; This config file was generated automatically"
		"; Refer to '.env.example.ini' for more information"
		"[api]"
		"base_url = 'http://localhost:${reflect_port}/'"
		"api_key = '${api_key_read}'"
		"verify_peer = false"
		"[database]"
		"host = '${db_host}'"
		"user = '${db_user}'"
		"pass = '${db_pass}'"
		"db = '${db_db}'"
	)
	
	for line in "${config[@]}" ; do
		echo "${line}" >> reflect/.env.ini
	done

	echo "+- That should be it!"
	echo "|"
	echo "|  Here is your admin API key that you can use to manage links"
	echo "|  ${api_key_admin}"
	echo "|"
	echo "|  See https://codeberg.org/vlw/href for more details"
	echo "|"
	echo "+- Thank you for using HREF."
}

main() {
	check_sys_depend
	install_reflect
	configure_href
}

main