module Suem (Config(..), ConfigSocket(..), suem) where

import qualified Data.Vector.Unboxed as V
import qualified Data.ByteString as B
import Data.Word
import Machine
import Commands
import Utils


data ConfigSocket = ConfigInet String | ConfigUnix String

data Config = Config Int      -- frequence
                     Int      -- size of RAM
                     FilePath -- path to ROM
                     (Maybe ConfigSocket)
                     (Maybe ConfigSocket)
                     (Maybe ConfigSocket)
                     (Maybe ConfigSocket)
                     (Maybe ConfigSocket)
                     (Maybe ConfigSocket)
                     (Maybe ConfigSocket)
                     (Maybe ConfigSocket)

doCommand :: [Int] -> Machine -> Machine
doCommand [0,1,0,0,1,1,1,0, 0,1,1,0,0,0,0,0] = doReset
doCommand [0,1,0,0,1,1,1,0, 0,1,1,0,0,0,0,1] = doNothing
doCommand [0,1,0,0,1,1,1,0, 0,1,1,0,0,0,1,0] = doStop
doCommand [0,1,0,0,1,1,1,0, 0,1,1,0,0,0,1,1] = doRTE
doCommand [0,1,0,0,1,1,1,0, 0,1,1,0,0,1,0,1] = doRTS
doCommand [0,1,0,0,1,1,1,0, 0,1,1,0,0,1,1,0] = doTrapV
doCommand [0,1,0,0,1,1,1,0, 0,1,1,0,0,1,1,1] = doRTR
doCommand [0,1,0,0,1,0,1,0, 1,1,1,1,1,1,0,0] = doIllegal
doCommand [0,1,0,0,1,0,1,0, 1,1,a,b,c,d,e,f] = doTAS [a,b,c] [d,e,f]
doCommand [0,1,0,0,1,0,1,0, 0,1,0,0,a,b,c,d] = doTrap [a,b,c,d]
doCommand [0,1,0,0,1,0,1,0, 0,1,0,1,0,a,b,c] = doLink [a,b,c]
doCommand [0,1,0,0,1,0,1,0, 0,1,0,1,1,a,b,c] = doUnlink [a,b,c]
doCommand [0,1,0,0,1,0,1,0, a,b,c,d,e,f,g,h] = doTST [a,b] [c,d,e] [f,g,h]
doCommand _ = error "Bad command."

runMachine :: Machine -> IO ()
runMachine m = do
    runMachine $ doCommand (toBits $ getWord m $ fromIntegral $ pc $ regs m) m

makeMachine :: V.Vector Word8 -> Int -> Machine
makeMachine romData ramSize = Machine rs rd romData
    where rd = V.replicate ramSize 0
          rs = Registers (getLong m 0x7e0004) 0x2700 (replicate 8 0)
                         (replicate 7 0) 0 (getLong m 0x7e0000)
          m  = Machine (Registers 0 0 [] [] 0 0) V.empty romData

suem :: Config -> IO ()
suem (Config _ ramSize romPath _ _ _ _ _ _ _ _) = do
    romData <- B.readFile romPath
    runMachine (makeMachine (V.fromList $ B.unpack $ romData) ramSize)