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module Display where

import Vec2 (..)
import Player (..)
import Game (Game)
import Enemy (..)
import Board (boardSize)

display : Game -> Element
display {time, player, enemyState, bestTime} =
  let enemyForms = map (enemyForm time) enemyState.enemies
      forms = boardForms
              ++ playerForms player
              ++ enemyForms
              ++ bestTimeForms bestTime
              ++ timeForms time
  in  collage (truncate boardSize.x) (truncate boardSize.y) forms

boardForms : [Form]
boardForms = [filled boardColor (rect boardSize.x boardSize.y)]

boardColor : Color
boardColor = rgb 34 122 34

playerForms : Player -> [Form]
playerForms player = [circleForm player.pos playerSize playerColor]

playerColor : Color
playerColor = rgb 224 224 224

enemyForm : Float -> Enemy -> Form
enemyForm time enemy =
  let pos = enemyMove enemy time
  in  circleForm pos enemySize enemyColor

enemyColor : Color
enemyColor = rgb 170 0 0

circleForm : Vec2 -> Float -> Color -> Form
circleForm pos size color =
  let outline = circle size
        |> filled black
      inside = circle (size - 2)
        |> filled color
  in  group [outline, inside]
        |> move (pos.x, pos.y)

bestTimeForms : Float -> [Form]
bestTimeForms bestTime =
  if(bestTime > 0) then
    let seconds = truncate (bestTime / 1000)
        text = "Record: " ++ (show seconds)
        pos =
          { x = boardSize.x / 2 - 65
          , y = -boardSize.y / 2 + 30
          }
    in  [textForm text pos rightAligned]
  else []

timeForms : Float -> [Form]
timeForms time =
  let seconds = truncate (time / 1000)
      text = (show seconds)
      pos = { x = 0.0, y = boardSize.y / 2 - 30 }
  in  [textForm text pos centered]

textForm : String -> Vec2 -> (Text -> Element) -> Form
textForm content pos alignment =
  let textElement = toText content
        |> typeface ["calibri", "arial"]
        |> Text.color textColor
        |> bold
        |> alignment
  in  textElement
        |> toForm
        |> move (pos.x, pos.y)

textColor : Color
textColor = rgb 224 224 224