require 'pathname'
require 'sqlite3'
require 'bcrypt'

module TonTonWeb
	User = Struct.new(:id, :name, :username, :email, :password_digest)

	class Auth
		attr_reader :root

		def initialize root_path
			@root = Pathname.new root_path

			@db = SQLite3::Database.new(@root+ 'database.sqlite')
		end

		def create_tables
			@db.execute "create table users (id integer primary key, name text, username text, email text, password_digest text);"
		end

		def create_user **options
			name = options.fetch :name
			username = options.fetch :username
			email = options.fetch :email
			password = options.fetch :password

			# Assert user doesn't exists

			hashed_password = BCrypt::Password.create(password)

			@db.execute(
				"insert into users (name, username, email, password_digest) values (?,?,?,?);",
				[name, username, email, password]
			)

			return # Return user
		end

		def delete_user id
			@db.execute "delete from users where id = ?;", id
		end

		def find_user **options
			name = options[:name]
			username = options[:username]
			email = options[:email]

			if not (name or username or email)
				raise "No options to find user."
			end

			user = nil

			user_query_template = "select id, name, username, email, password_digest from users where name = ? or username = ? or email = ?"

			@db.execute(user_query_template, [name, username, email]) do |row|
				user = TonTonWeb::User.new(*row)
			end

			return user
		end

		def authenticate username, password
			user = find_user(username: username)

			if BCrypt::Password.new(user.password_digest) == password
				return user
			else
				return false
			end
		end
	end
end