First commit, done on M6 from the PLAN.MD
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gauvainboiche
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// Headless balance runner. No DOM, no fetch: works in the browser (sim.html) and in Node.
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import {
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createGame, advanceDay, summarize, setBudget, confirmBudget, ensureCard, answerCard, nextFloat, dismissAlert,
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} from "../js/engine/index.js";
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// A strategy decides what to do at each quarterly review (review) and how to answer
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// each weekly card (answer, default: a coin flip from the game's own RNG).
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export const STRATEGIES = {
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baseline: { label: "Baseline (change nothing)", review: () => ({}) },
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yesMan: { label: "Yes to every card", review: () => ({}), answer: () => "yes" },
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noMan: { label: "No to every card", review: () => ({}), answer: () => "no" },
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spendthrift: {
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label: "Spendthrift (all budgets x1.4)",
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review: (state) => ({ alloc: scaled(state, 1.4) }),
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},
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austerity: {
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label: "Austerity (all budgets x0.75)",
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review: (state) => ({ alloc: scaled(state, 0.75) }),
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},
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policeState: {
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label: "Police state (police x3, army x1.5)",
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review: (state) => ({ alloc: { police: state.sectors.police.need * 3, army: state.sectors.army.need * 1.5 } }),
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},
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taxTheRich: {
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label: "Tax hike (income +10, corporate +10)",
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review: (state) => ({ taxes: { income: state.ref.taxes.income + 10, corporate: state.ref.taxes.corporate + 10 } }),
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},
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// Deliberately bad play: each should be able to end the term early.
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ruin: {
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label: "Ruin (all budgets x2, taxes cut to 15/12/10)",
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review: (state) => ({ alloc: scaled(state, 2), taxes: { income: 15, corporate: 12, vat: 10 } }),
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},
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starve: {
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label: "Starve (all budgets x0.25, taxes up)",
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review: (state) => ({
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alloc: scaled(state, 0.25),
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taxes: { income: state.ref.taxes.income + 15, corporate: state.ref.taxes.corporate + 10, vat: state.ref.taxes.vat + 10 },
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}),
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},
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tyrant: {
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label: "Tyrant (police x3, army x2, justice and social x0.3)",
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review: (state) => ({
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alloc: {
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...scaled(state, 0.7),
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police: state.sectors.police.need * 3,
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army: state.sectors.army.need * 2,
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justice: state.sectors.justice.need * 0.3,
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social: state.sectors.social.need * 0.3,
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},
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}),
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},
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neglectArmy: {
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label: "Neglect the army (army x0.1, the rest x1.1)",
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review: (state) => ({ alloc: { ...scaled(state, 1.1), army: state.sectors.army.need * 0.1 } }),
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},
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};
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function scaled(state, k) {
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const out = {};
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for (const [id, s] of Object.entries(state.sectors)) out[id] = s.need * (state.ref.ratio[id] * k);
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return out;
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}
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// Runs one game to the end of `years` (or the end of the term) and samples every `sampleEvery` days.
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export function runSim({ scenario, balance, cards = [], strategy, years = 1, seed = 1, sampleEvery = 30 }) {
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const state = createGame({ scenario, balance, seed, pronouns: "they" });
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const maxDay = Math.min(balance.time.termDays, Math.round(years * 365));
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const rows = [];
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const strat = STRATEGIES[strategy];
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const sample = () => rows.push(summarize(state, balance));
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sample();
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while (!state.over && state.day < maxDay) {
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if (state.pending.review) {
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const res = setBudget(state, balance, strat.review(state));
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if (!res.ok) throw new Error(`strategy ${strategy} produced an invalid budget: ${res.errors.join(", ")}`);
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confirmBudget(state);
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}
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while (state.pending.alert) dismissAlert(state);
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if (state.pending.weeklyCard) {
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const card = ensureCard(state, balance, cards);
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if (card) {
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const choice = strat.answer ? strat.answer(state, card) : nextFloat(state) < 0.5 ? "yes" : "no";
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answerCard(state, balance, cards, choice);
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}
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}
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advanceDay(state, balance);
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if (state.day % sampleEvery === 0) sample();
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}
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sample();
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return { rows, final: rows[rows.length - 1], over: state.over };
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}
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@@ -0,0 +1,78 @@
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<!doctype html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<title>Balance sim</title>
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<style>
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body { font: 13px/1.4 "Courier New", monospace; margin: 24px; background: #1d1a15; color: #e8dfc8; }
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h1, h2 { font-weight: normal; }
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label { margin-right: 16px; }
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input, select, button { font: inherit; background: #2b261e; color: inherit; border: 1px solid #6b5a3e; padding: 3px 6px; }
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button { cursor: pointer; }
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table { border-collapse: collapse; margin: 12px 0 28px; }
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th, td { border: 1px solid #4a4030; padding: 2px 8px; text-align: right; }
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th:first-child, td:first-child { text-align: left; }
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th { background: #2b261e; }
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.bad { color: #ff8a6b; }
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</style>
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</head>
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<body>
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<h1>Balance sim</h1>
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<p>
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<label>Years <input id="years" type="number" min="1" max="5" value="1" style="width:4em"></label>
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<label>Seed <input id="seed" type="number" value="1" style="width:6em"></label>
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<label>Detail <select id="detail"></select></label>
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<button id="run">Run</button>
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</p>
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<h2>Final state per strategy</h2>
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<div id="summary"></div>
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<h2>Timeline</h2>
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<div id="timeline"></div>
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<script type="module">
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import { runSim, STRATEGIES } from "./sim-core.js";
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const getJson = (u) => fetch(u).then((r) => r.json());
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const [balance, scenario, cardIndex] = await Promise.all([
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getJson("../data/balance.json"),
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getJson("../data/scenarios/default.json"),
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getJson("../data/cards/index.json"),
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]);
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const cards = (await Promise.all(cardIndex.files.map((f) => getJson(`../data/cards/${f}`)))).flat();
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const $ = (id) => document.getElementById(id);
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const detail = $("detail");
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for (const [k, s] of Object.entries(STRATEGIES)) detail.add(new Option(s.label, k));
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const COLS = [
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["day", "day", 0], ["growth", "growth %", 2], ["unemployment", "unempl %", 1], ["inflation", "infl %", 1],
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["debtRatio", "debt %GDP", 1], ["deficit", "deficit %GDP", 2], ["interestRate", "rate %", 2],
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["order", "order", 0], ["stability", "stab", 0], ["civilRights", "civil", 0], ["opinion", "opinion", 0],
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["economy", "econ", 0], ["hardPower", "hard", 0], ["softPower", "soft", 0], ["unrest", "unrest", 0], ["armyLoyalty", "army", 0],
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];
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const val = (row, k) => (k in row ? row[k] : row.indicators[k]);
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function table(rows, firstCol) {
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const head = `<tr><th>${firstCol}</th>${COLS.map((c) => `<th>${c[1]}</th>`).join("")}</tr>`;
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const body = rows.map(([name, row]) =>
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`<tr><td>${name}</td>${COLS.map((c) => `<td>${val(row, c[0]).toFixed(c[2])}</td>`).join("")}</tr>`).join("");
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return `<table>${head}${body}</table>`;
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}
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function run() {
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const years = Number($("years").value);
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const seed = Number($("seed").value);
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const results = {};
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for (const k of Object.keys(STRATEGIES)) results[k] = runSim({ scenario, balance, cards, strategy: k, years, seed });
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const ended = (r) => (r.over && r.over.type !== "term" ? ` ← ${r.over.type}, day ${r.over.day}` : "");
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$("summary").innerHTML = table(Object.entries(results).map(([k, r]) => [STRATEGIES[k].label + ended(r), r.final]), "strategy");
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const d = results[detail.value];
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$("timeline").innerHTML = table(d.rows.map((row) => [`d${row.day}`, row]), "day");
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}
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$("run").addEventListener("click", run);
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detail.addEventListener("change", run);
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run();
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</script>
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</body>
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</html>
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