import React, { useState, useEffect, useContext, useRef, useMemo, useCallback } from "react";
import Paper from '@material-ui/core/Paper';
import Button from '@material-ui/core/Button';
import equal from "fast-deep-equal";

import "./Actions.css";
import { PlayerName } from './PlayerName.js';
import { GlobalContext } from "./GlobalContext.js";

const Actions = ({buildActive, setBuildActive}) => {
  const { ws, gameId, name } = useContext(GlobalContext);
  const [state, setState] = useState('lobby');
  const [color, setColor] = useState(undefined);
  const [priv, setPriv] = useState(undefined);
  const [turn, setTurn] = useState({});
  const [edit, setEdit] = useState(name);
  const [active, setActive] = useState(0);

  const fields = useMemo(() => [
    'state', 'turn', 'private', 'active', 'color'
  ], []);

  const onWsMessage = (event) => {
    const data = JSON.parse(event.data);
    switch (data.type) {
    case 'game-update':
      console.log(`actions - game update`, data.update);
      if ('private' in data.update && !equal(data.update.private, priv)) {
        setPriv(data.update.private);
      }
      if ('state' in data.update && data.update.state !== state) {
        setState(data.update.state);
      }
      if ('color' in data.update && data.update.color !== color) {
        setColor(data.update.color);
      }
      if ('name' in data.update && data.update.name !== edit) {
        setEdit(data.update.name);
      }
      if ('turn' in data.update && !equal(data.update.turn, turn)) {
        setTurn(data.update.turn);
      }
      if ('active' in data.update && data.update.active !== active) {
        setActive(data.update.active);
      }
      break;
    default:
      break;
    }
  };
  const refWsMessage = useRef(onWsMessage);
  useEffect(() => { refWsMessage.current = onWsMessage; });
  useEffect(() => {
    if (!ws) { return; }
    const cbMessage = e => refWsMessage.current(e);
    ws.addEventListener('message', cbMessage);
    return () => {
      ws.removeEventListener('message', cbMessage);
    }
  }, [ws, refWsMessage]);
  useEffect(() => {
    if (!ws) { return; }
    ws.send(JSON.stringify({ 
      type: 'get', 
      fields
    }));
  }, [ws, fields]);

  const sendMessage = useCallback((data) => {
    if (!ws) {
      console.warn(`No socket`);
    } else {
      ws.send(JSON.stringify(data));
    }
  }, [ws]);

  const buildClicked = () => {
    setBuildActive(!buildActive);
  };

  const setName = (update) => {
    if (update !== name) {
      sendMessage({ type: 'player-name', name: update });
    }
    setEdit(name);
    if (buildActive) setBuildActive(false);
  }

  const changeNameClick = () => {
    setEdit("");
    if (buildActive) setBuildActive(false);
  }

  const discardClick = () => {
    const nodes = document.querySelectorAll('.Hand .Resource.Selected'),
      discards = { wheat: 0, brick: 0, sheep: 0, stone: 0, wood: 0 };
    
    for (let i = 0; i < nodes.length; i++) {
      discards[nodes[i].getAttribute("data-type")]++;
      nodes[i].classList.remove('Selected');
    }
    
    sendMessage({ type: 'discard', discards });
    if (buildActive) setBuildActive(false);
  }

  const newTableClick = () => {
    sendMessage({ type: 'shuffle' });
    if (buildActive) setBuildActive(false);
  };

  const tradeClick = () => {
    sendMessage({ type: 'trade' });
    if (buildActive) setBuildActive(false);
  }

  const rollClick = () => {
    sendMessage({ type: 'roll' });
    if (buildActive) setBuildActive(false);
  }

  const passClick = () => {
    sendMessage({ type: 'pass' });
    if (buildActive) setBuildActive(false);
  }

  const startClick = () => {
    sendMessage({ 
      type: 'set',
      field: 'state',
      value: 'game-order'
    });
    if (buildActive) setBuildActive(false);
  };

  if (!gameId) {
    return (<Paper className="Actions"/>);
  }

  const inLobby = state === 'lobby',
    inGame = state === 'normal',
    inGameOrder = state === 'game-order',
    hasGameOrderRolled = (priv && priv.orderRoll) ? true  : false,
    hasRolled = (turn && turn.roll) ? true : false,
    isTurn = (turn && turn.color === color) ? true : false,
    robberActions = (turn && turn.robberInAction),
    haveResources = priv ? priv.resources !== 0 : false,
    placement = (state === 'initial-placement' || (turn && turn.active === 'road-building')),
    placeRoad = placement && turn && turn.actions && turn.actions.indexOf('place-road') !== -1;

  return (
    <Paper className="Actions">
      { edit === "" && <PlayerName name={name} setName={setName}/> }
      <div className="Buttons">
      { name && inLobby && <>
        <Button disabled={(color && active >= 2) ? false : true } onClick={startClick}>Start game</Button>
        <Button disabled={color ? false : true} onClick={newTableClick}>New table</Button>
        <Button disabled={color ? true : false} onClick={changeNameClick}>Change name</Button>
      </> }
      { name && !inLobby && <>
        <Button disabled={
            robberActions || 
            (inGame && (!isTurn || hasRolled)) || 
            (inGameOrder && hasGameOrderRolled) ||
            (!inGame && !inGameOrder)
          } onClick={rollClick}>Roll Dice</Button>
        <Button disabled={placeRoad || robberActions || !isTurn || !hasRolled || !haveResources} onClick={tradeClick}>Trade</Button>
        <Button disabled={placeRoad || robberActions || !isTurn || !hasRolled || !haveResources} onClick={buildClicked}>Build</Button>
        <Button disabled={!(turn && turn.roll === 7 && priv && priv.mustDiscard > 0)}onClick={discardClick}>Discard</Button>
        <Button disabled={placeRoad || robberActions || !isTurn || !hasRolled} onClick={passClick}>Done</Button>
      </> }
      { /* inLobby &&
        <Button onClick={quitClick}>Quit</Button>
      */ }
      </div>
    </Paper>
  );
}

export { Actions };