// ============ economy.js — money, finance cycles, marketing ============
import { fmtMoney } from '../core/util.js';

export function pay(state, amount, category, note) {
  state.cash -= amount;
  pushFin(state, category, -amount);
  return true;
}
export function earn(state, amount, category, note) {
  state.cash += amount;
  pushFin(state, category, amount);
  return true;
}

function pushFin(state, category, amount) {
  const m = state.finance.current;
  m[category] = (m[category] || 0) + amount;
}

export const FIN_CATEGORIES = [
  ['rideTickets', 'Ride tickets'],
  ['shopSales', 'Shop sales'],
  ['entrance', 'Entrance fees'],
  ['construction', 'Construction'],
  ['wages', 'Staff wages'],
  ['research', 'Research'],
  ['marketing', 'Marketing'],
  ['heroes', 'Heroes & gear'],
  ['loot', 'Monster loot'],
  ['runCosts', 'Ride running costs'],
  ['misc', 'Misc'],
  ['loans', 'Loans'],
];

/** Monthly finance close: wages, interest, archive */
export function monthClose(state) {
  // wages
  let wages = 0;
  for (const s of state.staff) wages += s.wage;
  for (const r of state.rides) wages += Math.round(r.def.runCost);
  pay(state, wages, 'wages');
  // loan interest 1%/month
  if (state.loan > 0) {
    const interest = Math.ceil(state.loan * 0.01);
    pay(state, interest, 'loans');
  }
  // archive current month
  const cur = { ...state.finance.current };
  state.finance.history.push(cur);
  if (state.finance.history.length > 36) state.finance.history.shift();
  state.finance.current = {};
  state.lastMonthProfit = Object.entries(cur).reduce((a, [, v]) => a + v, 0);
  return wages;
}

// ---------------- Marketing campaigns ----------------
export const CAMPAIGNS = [
  { id: 'flyers', name: 'Fairy Flyer Drop', cost: 400, weeks: 6, pull: 1.6 },
  { id: 'heralds', name: 'Town Crier Heralds', cost: 900, weeks: 8, pull: 2.4 },
  { id: 'crystal', name: 'Crystal Ball Vision', cost: 1800, weeks: 10, pull: 3.6 },
];

export function startCampaign(state, id) {
  const c = CAMPAIGNS.find(c => c.id === id);
  if (!c || state.cash < c.cost) return false;
  pay(state, c.cost, 'marketing');
  state.campaigns.push({ id: c.id, name: c.name, weeksLeft: c.weeks, pull: c.pull });
  return true;
}
export function campaignPull(state) {
  let p = 0;
  for (const c of state.campaigns) p += c.pull;
  return p;
}
export function tickCampaigns(state) {
  for (let i = state.campaigns.length - 1; i >= 0; i--) {
    state.campaigns[i].weeksLeft--;
    if (state.campaigns[i].weeksLeft <= 0) state.campaigns.splice(i, 1);
  }
}

// ---------------- Loan ----------------
export function takeLoan(state, amount) {
  amount = Math.min(amount, state.loanLimit - state.loan);
  if (amount <= 0) return false;
  state.loan += amount;
  earn(state, amount, 'loans');
  return true;
}
export function repayLoan(state, amount) {
  amount = Math.min(amount, state.loan, state.cash);
  if (amount <= 0) return false;
  state.loan -= amount;
  pay(state, amount, 'loans');
  return true;
}