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script.js
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script.js
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const parameters = {
classicMode: true,
maxEntry: 9,
target: 1000,
misere: false,
hardMode: false,
};
let product = 1;
let entries = [];
let gameOver = false;
/** Set the parameters and display the playing space. */
const start = () => {
if (parameters.classicMode) {
parameters.maxEntry = 9;
parameters.target = 1000;
parameters.misere = false;
parameters.hardMode = false;
} else {
parameters.maxEntry = document.getElementById('max-entry').value;
parameters.target = document.getElementById('target').value;
}
document.getElementById(
'target-display'
).textContent = `Target: ${parameters.target}`;
document.getElementById('starter').style.display = 'none';
document.getElementById('play-space').style.display = 'block';
gameOver = false;
};
/** Called when the user submits an entry. */
const handleEntry = () => {
// clear previous error
createError('');
// check that submission is valid and submit it
for (let i = 0; i < 1; i++) {
const entry = parseInt(document.getElementById('entry-box').value);
if (entry == NaN) {
createError('Entries must be positive integers.');
break;
}
if (entry < 2 || entry > parameters.maxEntry) {
createError(`Entries must be between 2 and ${parameters.maxEntry}.`);
break;
}
handleNumber(entry);
// create computer response if player didn't win
if (!gameOver) {
if (parameters.hardMode) {
// Misere is the same as regular, except the real target is half of the given target.
if (parameters.misere) {
handleNumber(
product < parameters.target / 2
? calcEntry(parameters.target / 2)
: 2
);
} else {
handleNumber(calcEntry(parameters.target));
}
} else {
const oppEntry =
Math.floor(Math.random() * (parameters.maxEntry - 1)) + 2;
handleNumber(oppEntry);
}
}
}
// clear entry box
document.getElementById('entry-box').value = '';
};
/** Updates product total and entry list for each number submitted by the user or the computer. */
const handleNumber = (number) => {
entries.push(number);
updateEntries();
product *= number;
updateProduct();
};
/** Update the displayed product total, and check if the target value has been reached. */
const updateProduct = () => {
if (product >= parameters.target) {
handleWin();
}
document.getElementById('product-display').textContent = product;
};
/** Update the displayed list of submitted numbers. */
const updateEntries = () => {
let entryList = '';
entries.forEach((entry) => {
entryList = `${entryList} ${entry.toString()}`;
});
document.getElementById('entry-list').textContent = entryList;
};
const calcEntry = (target) => {
const max = parameters.maxEntry;
const lastTarget = Math.ceil(target / (2 * max));
if (product < lastTarget) {
return calcEntry(lastTarget);
}
const winThreshold = Math.ceil(target / max);
if (product >= winThreshold) {
return Math.min(Math.floor(((target - 1) * 2) / product), max);
} else {
return Math.floor(Math.random() * (max - 1)) + 2;
}
};
/** Reset the entire game. */
const reset = () => {
product = 1;
entries = [];
updateProduct();
updateEntries();
document.getElementById('end-message').style.display = 'none';
document.getElementById('entry-box').style.display = 'inline';
document.getElementById('submitter').style.display = 'inline';
document.getElementById('entry-box').value = '';
start();
};
/** Set the text of the error-message element. */
const createError = (message) => {
document.getElementById('error-text').textContent = message;
};
/** Figure out who won, display an end message, and hide the entry box. */
const handleWin = () => {
if (!gameOver) {
const userWin = entries.length % 2;
const element = document.getElementById('end-message');
if (userWin === 1) {
element.textContent = 'Congratulations, you won!';
element.style.color = 'green';
} else {
element.textContent = `Sorry, the computer beat you to ${parameters.target}.`;
element.style.color = 'red';
}
element.style.display = 'block';
gameOver = true;
}
document.getElementById('entry-box').style.display = 'none';
document.getElementById('submitter').style.display = 'none';
};
/** Toggle the win condition. */
const switchWinType = () => {
parameters.misere = !parameters.misere;
if (parameters.misere) {
document.getElementById('win-type-message').textContent =
'Misere -- You lose if you exceed the target value.';
document.getElementById('win-type-switcher').value = 'Switch to Regular';
} else {
document.getElementById('win-type-message').textContent =
'Regular -- You win if you exceed the target value.';
document.getElementById('win-type-switcher').value = 'Switch to Misere';
}
};
/** Toggle the computer-selection mode. */
const switchComputerMode = () => {
parameters.hardMode = !parameters.hardMode;
if (parameters.hardMode) {
document.getElementById('computer-mode-message').textContent =
'Hard -- The computer chooses values optimally.';
document.getElementById('computer-mode-switcher').value =
'Switch to Easy Mode';
} else {
document.getElementById('computer-mode-message').textContent =
'Easy -- The computer chooses values randomly.';
document.getElementById('computer-mode-switcher').value =
'Switch to Hard Mode';
}
};
/** Toggle the parameter setup. */
const switchParameterSetup = () => {
parameters.classicMode = !parameters.classicMode;
if (parameters.classicMode) {
document.getElementById('parameters').style.display = 'none';
document.getElementById('parameter-mode-message').textContent =
'Playing Classic Mode';
document.getElementById('parameter-mode-switcher').value =
'Set Custom Parameters';
document.getElementById('parameter-mode-notes').textContent =
'Switching to custom parameters will reset the game.';
reset();
} else {
document.getElementById('parameters').style.display = 'block';
document.getElementById('parameter-mode-message').textContent =
'Playing With Custom Parameters';
document.getElementById('parameter-mode-switcher').value =
'Back to Classic';
document.getElementById('parameter-mode-notes').textContent =
'Switching to Classic will reset the game. Click Apply Changes to reset the game with your new parameters.';
reset();
}
};
/** Randomize the maximum entry. */
const randomizeMax = () => {
const newMax = Math.floor(Math.random() * 23) + 3; // ranges 3 to 25
parameters.maxEntry = newMax;
document.getElementById('max-entry').value = newMax;
};
/** Randomize the maximum entry. */
const randomizeTarget = () => {
// ranges 10 to 1 million, two sig figs
const value = Math.floor(Math.random() * 91) + 10; // ranges 10 to 100
const magnitude = Math.floor(Math.random() * 5); // ranges 0 to 4
const newTarget = value * Math.pow(10, magnitude);
parameters.target = newTarget;
document.getElementById('target').value = newTarget;
};