// Game creation and the daily tick. Pure: data (balance, scenario) is passed in.

import { STATE_VERSION, IND_IDS, VAR_IDS, qualityFromRatio } from "./state.js";
import { computeFiscal, computeDevs, advanceEconomy } from "./economy.js";
import { applyShifts, ageBias } from "./modifiers.js";
import { stepSectors } from "./sectors.js";
import { stepIndicators, stepVars } from "./indicators.js";
import { checkGameOver } from "./gameover.js";

export const PRONOUNS = ["he", "she", "they"];

// pronouns: omit it and the game opens with the "who are you" question (pending.profile).
export function createGame({ scenario, balance, seed = Date.now(), countryName, lang = "en", pronouns }) {
  const se = scenario.economy;
  const gdp = se.gdp;

  const sectors = {};
  for (const [id, s] of Object.entries(scenario.sectors)) {
    sectors[id] = { need: s.need, alloc: s.alloc, quality: qualityFromRatio(s.alloc / s.need, balance) };
  }

  const state = {
    version: STATE_VERSION,
    seed: seed >>> 0,
    rngState: seed >>> 0,
    day: 0,
    speed: 1, // 0 = paused, otherwise one of balance.time.speeds
    startDate: scenario.startDate,
    lang,
    pronouns: PRONOUNS.includes(pronouns) ? pronouns : "they",
    countryName: countryName ?? scenario.name[lang] ?? scenario.name.en,
    scenarioId: scenario.id,
    economy: {
      gdp,
      debt: (gdp * se.debtRatio) / 100,
      growth: se.growth,
      unemployment: se.unemployment,
      inflation: se.inflation,
      taxes: { ...se.taxes },
      otherRevenue: se.otherRevenue,
      extraSpending: 0,
    },
    sectors,
    indicators: { ...scenario.indicators },
    modifiers: [],
    flags: {},
    cardHistory: [],
    pendingCard: null,
    followUps: [],
    // Day 0 opens with the pronoun question, the initial budget review and a first card.
    // Any true flag here pauses time (see advanceDay).
    pending: { profile: !PRONOUNS.includes(pronouns), weeklyCard: true, review: true, alert: false },
    over: null,
    risk: { revolution: 0, coup: 0, impeachment: 0, defaultZone: false }, // days in each danger zone
    alerts: [], // urgent telegrams waiting to be read, oldest first
    history: { t: [], series: {} },
    log: [],
    ref: null,
  };

  state.ref = {
    taxes: { ...se.taxes },
    ind: { ...scenario.indicators },
    vars: { growth: se.growth, unemployment: se.unemployment, inflation: se.inflation },
    sectors: Object.fromEntries(Object.entries(sectors).map(([id, s]) => [id, s.quality])),
    ratio: Object.fromEntries(Object.entries(sectors).map(([id, s]) => [id, s.alloc / s.need])),
    dev: null,
  };
  state.ref.dev = computeDevs(state, balance, computeFiscal(state, balance));

  recordHistory(state, balance);
  return state;
}

function recordHistory(state, bal) {
  const f = computeFiscal(state, bal);
  const h = state.history;
  h.t.push(state.day);
  const sample = { debtRatio: f.debtRatio, deficit: f.deficit };
  for (const id of IND_IDS) sample[id] = state.indicators[id];
  for (const id of VAR_IDS) sample[id] = state.economy[id];
  for (const [k, v] of Object.entries(sample)) (h.series[k] ??= []).push(round(v));
}

const round = (v) => Math.round(v * 100) / 100;

export function setSpeed(state, bal, speed) {
  if (speed !== 0 && !bal.time.speeds.includes(speed)) return false;
  state.speed = speed;
  return true;
}

// Clears a pause condition once the player has dealt with it.
export function clearPending(state, kind) {
  state.pending[kind] = false;
}

export function setPronouns(state, pronouns) {
  if (!PRONOUNS.includes(pronouns)) return false;
  state.pronouns = pronouns;
  state.pending.profile = false;
  return true;
}

// True while the game is waiting on the player (profile, budget review, weekly card, alert).
export const isWaiting = (state) => Object.values(state.pending).some(Boolean);

// Advances one in-game day unless the game is over or waiting on the player.
export function advanceDay(state, bal) {
  if (state.over) return { advanced: false, blocked: "over", events: null };
  if (isWaiting(state)) return { advanced: false, blocked: "pending", events: null };

  applyShifts(state, bal);
  const fiscal = computeFiscal(state, bal);
  const devs = computeDevs(state, bal, fiscal);

  advanceEconomy(state, fiscal);
  stepVars(state, bal, devs);
  stepIndicators(state, bal, devs);
  stepSectors(state, bal, fiscal);
  ageBias(state);

  state.day += 1;

  const events = { weeklyCard: false, review: false, termEnd: false, gameOver: null };
  const fallen = checkGameOver(state, bal);
  if (fallen) {
    state.over = { type: fallen, day: state.day };
    events.gameOver = fallen;
    recordHistory(state, bal);
  } else if (state.day >= bal.time.termDays) {
    state.over = { type: "term", day: state.day };
    events.termEnd = true;
    recordHistory(state, bal);
  } else {
    if (state.day % bal.time.historyEvery === 0) recordHistory(state, bal);
    if (state.day % bal.time.daysPerWeek === 0) state.pending.weeklyCard = events.weeklyCard = true;
    if (state.day % bal.time.daysPerQuarter === 0) state.pending.review = events.review = true;
  }
  return { advanced: true, blocked: null, events };
}

// Read-only snapshot for the UI and the sim.
export function summarize(state, bal) {
  const f = computeFiscal(state, bal);
  return {
    day: state.day,
    gdp: state.economy.gdp,
    debt: state.economy.debt,
    debtRatio: f.debtRatio,
    interestRate: f.rate,
    revenue: f.revenue,
    spending: f.spending,
    interest: f.interest,
    deficit: f.deficit,
    growth: state.economy.growth,
    unemployment: state.economy.unemployment,
    inflation: state.economy.inflation,
    indicators: { ...state.indicators },
  };
}