(local util (require :lib.util))
(local fennel (require :lib.fennel))
(local style (require :core.style))
(local lume (require :lib.lume))

(local repl (util.hot-table ...))

(fn repl.text-height [text ?font]
  (let [font (or ?font style.font)
        (_ newlines) (text:gsub "\n" "\n")]
    (* (font:get_height) (+ newlines 1))))

(fn repl.inspect-table [tbl view x y-start w]
  (var y y-start)
  (var h 0)
  (each [k v (pairs tbl)]
    (let [kstr (fv k)
          wk 1]
          nil))
  )
(fn repl.inspect [v view x y w]
  (renderer.draw_text style.font (fv v) x y style.text)
  (repl.text-height (fv v)))

(fn repl.inspector [{: vals} view x y]
  (var h 0)
  (each [i v (ipairs vals)]
    (set h (+ h (repl.inspect v view x (+ y h) view.size.x))))
  (+ h style.padding.y))

(fn repl.notify [listeners line]
  (each [_ listener (ipairs listeners)]
    (listener:append line)))

(fn repl.run [{: listeners}]
  (local inspector #(repl.inspector $...))
  (fennel.repl {:readChunk coroutine.yield
                :onValues #(repl.notify listeners {:draw inspector :vals $1})
                :onError (fn [errType err luaSource] (repl.notify listeners {:draw inspector :vals [err]}))
                :pp #$1
                :env (lume.clone _G)}))

(fn repl.listen [{: listeners} listener]
  (table.insert listeners listener))

(fn repl.unlisten [{: listeners} listener]
  (lume.remove listeners listener))

(fn repl.submit [{: coro} chunk]
  (coroutine.resume coro (.. chunk "\n")))

(fn repl.new []
  (local result
    {:listeners []
     :listen #(repl.listen $...)
     :unlisten #(repl.unlisten $...)
     :submit #(repl.submit $...)
     :coro (coroutine.create repl.run)})
  (coroutine.resume result.coro result)
  result)

repl.hot