(in-package :cl-tty.backend)

(defclass backend () ())

(defgeneric initialize-backend (backend)
  (:method ((b backend)) b))

(defgeneric shutdown-backend (backend)
  (:method ((b backend)) (values)))

(defgeneric backend-size (backend)
  (:method ((b backend))
    (values 80 24)))

(defgeneric backend-write (backend string))

(defgeneric backend-clear (backend)
  (:method ((b backend))
    (backend-write b (format nil "~C[2J~C[H" #\Esc #\Esc))))

(defgeneric draw-text (backend x y string fg bg &key
                       bold italic underline reverse dim blink))

(defgeneric draw-border (backend x y width height
                         &key style fg bg title title-align))

(defgeneric draw-rect (backend x y width height &key bg))

(defgeneric draw-link (backend x y string url &key fg bg))

(defgeneric draw-ellipsis (backend x y width &key fg bg))

(defgeneric cursor-move (backend x y))

(defgeneric cursor-hide (backend)
  (:method ((b backend)) (values)))

(defgeneric cursor-show (backend)
  (:method ((b backend)) (values)))

(defgeneric cursor-style (backend shape &key blink)
  (:method ((b backend) shape &key blink) (values)))

(defgeneric begin-sync (backend)
  (:method ((b backend)) (values)))

(defgeneric end-sync (backend)
  (:method ((b backend)) (values)))

(defgeneric read-event (backend &key timeout)
  (:method ((b backend) &key timeout) (values nil nil)))

(defgeneric enable-mouse (backend)
  (:method ((b backend)) (values)))

(defgeneric enable-bracketed-paste (backend)
  (:method ((b backend)) (values)))

(defgeneric capable-p (backend feature)
  (:method ((b backend) feature)
    (declare (ignore feature))
    nil))