// Status effects a unit or city can carry. They are data-driven so new ones can
// be added without touching the simulation or the renderer: the server derives
// the active ids, applies their fields, and ships the ids in snapshots; the
// browser draws one icon per id.
//
// A status may define `hpLossPerDay` (a fraction of maximum hit points taken
// each day), a `cityHpLossPerDay` override for when the unit stands in a city,
// and an `upkeepMultiplier` applied to the unit's upkeep while it is active.

import { formatPercent } from "../text_format.js";

export const STATUS_ENCIRCLED = "encircled";
export const STATUS_BESIEGED = "besieged";
export const STATUS_BATTLE = "battle";

export const STATUSES = [
  {
    id: STATUS_ENCIRCLED,
    label: "Encircled",
    icon: "encirclement.svg",
    get description() {
      return `Cut off: every adjacent land tile is held by a hostile unit and no friendly port supplies it by sea. Loses ${formatPercent(this.hpLossPerDay)} of its maximum hit points each day, or ${formatPercent(this.cityHpLossPerDay)} inside a city.`;
    },
    hpLossPerDay: 0.10,
    cityHpLossPerDay: 0.02,
  },
  {
    id: STATUS_BESIEGED,
    label: "Besieged",
    icon: "encirclement.svg",
    description: "Cut off: every adjacent land tile is held by a hostile unit and no friendly port supplies it by sea.",
  },
  {
    id: STATUS_BATTLE,
    label: "In battle",
    icon: "icon_battle.svg",
    get description() {
      return `Fighting an enemy unit on the same tile. Upkeep is multiplied by ${this.upkeepMultiplier} and the unit cannot pillage while the battle rages.`;
    },
    upkeepMultiplier: 3,
  },
];

export function statusById(id) {
  return STATUSES.find((status) => status.id === id) || null;
}