module Main where

import Data.Map qualified as Map
import Graphics.Vty
import Control.Exception
import Data.List.NonEmpty (NonEmpty(..))
import Data.List.NonEmpty qualified as NonEmpty

import Model
import Rendering

world0 :: World
world0 = World {
  worldMe = 'b',
  worldBoxes = Map.fromList
    [('1', Box {
      boxColor = withForeColor defAttr green,
      boxLocation = Location '1' (-1) 0,
      boxWalls = makeWalls [
        "▓▓   ▓▓",
        "▓     ▓",
        "▓     ▓",
        "▓     ▓",
        "▓  ▓  ▓",
        "▓     ▓",
        "▓  ▓  ▓"
        ]
    }),
    ('2', Box {
      boxColor = withForeColor defAttr cyan,
      boxLocation = Location '1' 1 1,
      boxWalls = makeWalls [
        "▓▓▓ ▓▓▓",
        "▓     ▓",
        "▓     ▓",
        "       ",
        "▓     ▓",
        "▓     ▓",
        "▓▓▓ ▓▓▓"
      ]
    }),
    ('3', Box {
      boxColor = withForeColor defAttr blue,
      boxLocation = Location '2' 1 1,
      boxWalls = makeWalls [
        "▓▓   ▓▓",
        "▓  ▓  ▓",
        "▓     ▓",
        "▓     ▓",
        "▓     ▓",
        "▓     ▓",
        "▓▓▓ ▓▓▓"
      ]
    }),
        ('4', Box {
      boxColor = withForeColor defAttr black,
      boxLocation = Location '3' (-3) 0,
      boxWalls = makeWalls [
        "▓▓   ▓▓",
        "▓  ▓  ▓",
        "▓     ▓",
        "▓     ▓",
        "▓     ▓",
        "▓     ▓",
        "▓▓▓ ▓▓▓"
      ]
    }),
    ('b', Box {
        boxColor = withForeColor defAttr red,
        boxLocation = Location '1' 0 1,
        boxWalls = solid 7
    }),
    ('x', Box {
        boxColor = withForeColor defAttr yellow,
        boxLocation = Location '1' 0 (-1),
        boxWalls = solid 7
    }),
    ('y', Box {
        boxColor = withForeColor defAttr magenta,
        boxLocation = Location '1' 0 (-2),
        boxWalls = solid 7
    })

    ]
  }

main :: IO ()
main =
  bracket (mkVty =<< userConfig) shutdown \vty ->
   do
      loop vty (pure world0)
      pure ()

loop :: Vty -> NonEmpty World -> IO ()
loop vty (world :| history) =
 do update vty (picForImage (drawNestedWorld world))
    ev <- nextEvent vty
    case ev of
      EvKey key _modifier ->
        case key of
          KUp    -> loop vty (move world (-1,0) :| world : history)
          KDown  -> loop vty (move world (1,0)  :| world : history)
          KLeft  -> loop vty (move world (0,-1) :| world : history)
          KRight -> loop vty (move world (0,1)  :| world : history)
          KChar 'z'
            | Just worlds <- NonEmpty.nonEmpty history ->
              loop vty worlds
          KEsc -> pure ()
          _ -> loop vty (world :| history)
      _ -> loop vty (world :| history)