/**
 * Visual state of an animal cell for feedback (no gauges). Used by UI to add CSS classes.
 * Refs: docs/specs/animal_generique.md, temperature.md.
 */

import { LootTables } from "./loot-tables.js";
import { getDisplayTemperature } from "./biome-rules.js";
import { getCurrentSeason, getSeasonTemperatureModifier } from "./seasons.js";
import { GameConfig } from "./config.js";

/**
 * @param {number} cellTemp
 * @param {number} idealTemp
 * @param {number} tolerance
 * @returns {{ cold: boolean, hot: boolean }}
 */
function getTemperatureState(cellTemp, idealTemp, tolerance) {
  return {
    cold: cellTemp < idealTemp - tolerance,
    hot: cellTemp > idealTemp + tolerance,
  };
}

/**
 * @param {{ fedAgo: number, visitAgo: number, maxFood: number, maxVisit: number, cold: boolean, hot: boolean }} opts
 * @returns {{ hungry: boolean, sick: boolean, happy: boolean }}
 */
function getCareState(opts) {
  const { fedAgo, visitAgo, maxFood, maxVisit, cold, hot } = opts;
  const hungry = fedAgo > maxFood * 0.6;
  const sick = cold || hot || hungry || visitAgo > maxVisit * 0.8;
  const happy = !sick && fedAgo < maxFood * 0.3 && visitAgo < maxVisit * 0.3
    && !cold && !hot;
  return { hungry, sick, happy };
}

const EMPTY_VISUAL = { cold: false, hot: false, hungry: false, sick: false, happy: false };

/**
 * @param {import("./types.js").AnimalCell} cell
 * @param {import("./types.js").GameState} state
 * @param {{ width: number, height: number }} grid
 * @param {string} originKey
 * @returns {{ cellTemp: number, idealTemp: number, tolerance: number } | null}
 */
function getAnimalTempInputs(cell, state, grid, originKey) {
  const def = LootTables.Animals[cell.id];
  if (!def) return null;
  const m = originKey.match(/^(\d+)_(\d+)$/);
  if (!m) return null;
  const ox = Number(m[1]);
  const oy = Number(m[2]);
  const baseTemp = getDisplayTemperature(ox, oy, grid);
  const seasonMod = getSeasonTemperatureModifier(getCurrentSeason(state));
  const cellTemp = baseTemp + seasonMod;
  const idealTemp = def.idealTemperature ?? 18;
  const tolerance = def.temperatureTolerance ?? 5;
  return { cellTemp, idealTemp, tolerance };
}

/**
 * @param {import("./types.js").AnimalCell} cell
 * @returns {{ fedAgo: number, visitAgo: number, maxFood: number, maxVisit: number }}
 */
function getAnimalTimeInputs(cell) {
  const nowUnix = Math.floor(Date.now() / 1000);
  const lastFed = cell.lastFedAt ?? cell.placedAt ?? nowUnix;
  const lastVisited = cell.lastVisitedAt ?? cell.placedAt ?? nowUnix;
  const maxFood = GameConfig.Food?.MaxSecondsWithoutFood ?? 120;
  const maxVisit = GameConfig.Visitor?.MaxSecondsWithoutVisit ?? 300;
  return { fedAgo: nowUnix - lastFed, visitAgo: nowUnix - lastVisited, maxFood, maxVisit };
}

/**
 * @param {import("./types.js").AnimalCell} cell
 * @param {import("./types.js").GameState} state
 * @param {{ width: number, height: number }} grid
 * @param {string} originKey
 * @returns {{ cellTemp: number, idealTemp: number, tolerance: number, fedAgo: number, visitAgo: number, maxFood: number, maxVisit: number } | null}
 */
function getAnimalVisualInputs(cell, state, grid, originKey) {
  const temp = getAnimalTempInputs(cell, state, grid, originKey);
  if (!temp) return null;
  const time = getAnimalTimeInputs(cell);
  return { ...temp, ...time };
}

/**
 * @param {import("./types.js").AnimalCell} cell Origin animal cell.
 * @param {import("./types.js").GameState} state
 * @param {{ width: number, height: number }} grid
 * @param {string} originKey "x_y" of origin cell.
 * @returns {{ cold: boolean, hot: boolean, hungry: boolean, sick: boolean, happy: boolean }}
 */
export function getAnimalVisualState(cell, state, grid, originKey) {
  const inputs = getAnimalVisualInputs(cell, state, grid, originKey);
  if (!inputs) return EMPTY_VISUAL;
  const { cold, hot } = getTemperatureState(inputs.cellTemp, inputs.idealTemp, inputs.tolerance);
  const { hungry, sick, happy } = getCareState({ fedAgo: inputs.fedAgo, visitAgo: inputs.visitAgo, maxFood: inputs.maxFood, maxVisit: inputs.maxVisit, cold, hot });
  return { cold, hot, hungry, sick, happy };
}