puzzle-15

Author: isstuev

public/static/duck.jpg

@@ -0,0 +1,183 @@
+import { Grid, Box, Flex, Button } from '@chakra-ui/react';
+import { motion } from 'framer-motion';
+import React, { useState, useEffect, useCallback, useRef } from 'react';
+
+const getPossibleMoves = (emptyIndex: number): Array<number> => {
+
+  const moves: Array<number> = [];
+  const row = Math.floor(emptyIndex / 4);
+  const col = emptyIndex % 4;
+
+  if (row > 0) {
+    // Move tile from above into the empty space
+    moves.push((row - 1) * 4 + col);
+  }
+  if (row < 3) {
+    // Move tile from below into the empty space
+    moves.push((row + 1) * 4 + col);
+  }
+  if (col > 0) {
+    // Move tile from the left into the empty space
+    moves.push(row * 4 + (col - 1));
+  }
+  if (col < 3) {
+    // Move tile from the right into the empty space
+    moves.push(row * 4 + (col + 1));
+  }
+
+  return moves;
+};
+
+const shuffleBoard = (initialBoard: Array<number>): Array<number> => {
+  const board = initialBoard.slice(); // Create a copy of the board
+  let emptyIndex = board.indexOf(15);
+  let lastMoveIndex = -1;
+
+  for (let i = 0; i < 100; i++) {
+    let possibleMoves = getPossibleMoves(emptyIndex);
+
+    // Prevent immediate reversal of the last move
+    if (lastMoveIndex !== -1) {
+      possibleMoves = possibleMoves.filter(index => index !== lastMoveIndex);
+    }
+
+    // Randomly select a tile to move into the empty space
+    const moveIndex = possibleMoves[Math.floor(Math.random() * possibleMoves.length)];
+
+    // Swap the selected tile with the empty space
+    [ board[emptyIndex], board[moveIndex] ] = [ board[moveIndex], board[emptyIndex] ];
+
+    // Update indices for the next iteration
+    lastMoveIndex = emptyIndex;
+    emptyIndex = moveIndex;
+  }
+
+  return board;
+};
+
+const Puzzle15 = () => {
+  const [ tiles, setTiles ] = useState<Array<number>>(Array.from({ length: 16 }, (_, i) => i));
+  const [ isWon, setIsWon ] = useState(false);
+  const [ image, setImage ] = useState<HTMLImageElement | null>(null);
+  const canvasRefs = useRef<Array<(HTMLCanvasElement | null)>>([]);
+
+  const initializeGame = useCallback(() => {
+    const newTiles = shuffleBoard(tiles);
+    setTiles(newTiles);
+    setIsWon(false);
+  // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, []);
+
+  useEffect(() => {
+    initializeGame();
+  }, [ initializeGame ]);
+
+  useEffect(() => {
+    const img = new Image();
+    img.src = '/static/duck.jpg';
+    img.onload = () => setImage(img);
+  }, []);
+
+  useEffect(() => {
+    if (image) {
+      tiles.forEach((tile, index) => {
+        const canvas = canvasRefs.current[index];
+        if (canvas) {
+          const ctx = canvas.getContext('2d');
+          if (ctx) {
+            const tileSize = image.width / 4;
+            const srcX = (tile % 4) * tileSize;
+            const srcY = Math.floor(tile / 4) * tileSize;
+            ctx.drawImage(
+              image,
+              srcX,
+              srcY,
+              tileSize,
+              tileSize,
+              0,
+              0,
+              canvas.width,
+              canvas.height,
+            );
+          }
+        }
+      });
+    }
+  }, [ tiles, image ]);
+
+  const isAdjacent = React.useCallback((index1: number, index2: number) => {
+    const row1 = Math.floor(index1 / 4);
+    const col1 = index1 % 4;
+    const row2 = Math.floor(index2 / 4);
+    const col2 = index2 % 4;
+    return Math.abs(row1 - row2) + Math.abs(col1 - col2) === 1;
+  }, []);
+
+  const checkWinCondition = useCallback((currentTiles: Array<number>) => {
+    setIsWon(currentTiles.every((tile, index) => tile === index));
+  }, []);
+
+  const moveTile = useCallback((index: number) => {
+    const emptyIndex = tiles.indexOf(15);
+    if (isAdjacent(index, emptyIndex)) {
+      const newTiles = [ ...tiles ];
+      [ newTiles[index], newTiles[emptyIndex] ] = [ newTiles[emptyIndex], newTiles[index] ];
+      setTiles(newTiles);
+      checkWinCondition(newTiles);
+    }
+  }, [ tiles, isAdjacent, checkWinCondition ]);
+
+  const handleTileClick = useCallback((index: number) => () => {
+    if (!isWon) {
+      moveTile(index);
+    }
+  }, [ isWon, moveTile ]);
+
+  return (
+    <Flex flexDirection="column" alignItems="center" justifyContent="center">
+      <Grid templateColumns="repeat(4, 1fr)" w="400px" h="400px">
+        { tiles.map((tile, index) => (
+          <motion.div
+            key={ tile }
+            layout
+            transition={{ type: 'spring', stiffness: 300, damping: 30 }}
+            onClick={ handleTileClick(index) }
+          >
+            <Box position="relative">
+              <canvas
+                ref={ (el) => (canvasRefs.current[index] = el) }
+                width="100"
+                height="100"
+                style={{
+                  display: tile !== 15 ? 'block' : 'none',
+                  border: '1px solid gray',
+                }}
+              />
+              <Box
+                position="absolute"
+                top="0"
+                left="0"
+                right="0"
+                bottom="0"
+                display="flex"
+                alignItems="center"
+                justifyContent="center"
+                fontSize="3xl"
+                fontWeight="bold"
+                color="white"
+                opacity="0"
+                _hover={{ opacity: 0.3 }}
+                transition="opacity 0.2s"
+              >
+                { tile !== 15 && tile + 1 }
+              </Box>
+            </Box>
+          </motion.div>
+        )) }
+      </Grid>
+      { isWon && <Button mt={ 10 }>Claim NFT</Button> }
+    </Flex>
+  );
+};
+
+export default Puzzle15;