/**
 * Familiar duration references for time-blindness aids.
 *
 * "About as long as a movie", "3 episodes of The Office".
 * Pure client-side TS — no backend dependency.
 */

import type { TimeRangeEntry, TimeReference } from './types.js';

const DEFAULT_DATABASE: TimeRangeEntry[] = [
  {
    minHours: 0,
    maxHours: 0.25,
    references: [
      { text: 'About as long as a coffee break', emoji: '☕', category: 'activity' },
      { text: 'Like listening to a few songs', emoji: '🎵', category: 'media' },
    ],
  },
  {
    minHours: 0.25,
    maxHours: 0.5,
    references: [
      { text: 'About as long as a TV episode', emoji: '📺', category: 'media' },
      { text: 'Like a short walk around the block', emoji: '🚶', category: 'activity' },
    ],
  },
  {
    minHours: 0.5,
    maxHours: 1,
    references: [
      { text: 'About as long as a yoga class', emoji: '🧘', category: 'activity' },
      { text: 'Like watching 2 episodes of The Office', emoji: '📺', category: 'media' },
    ],
  },
  {
    minHours: 1,
    maxHours: 2,
    references: [
      { text: 'About as long as a movie', emoji: '🎬', category: 'media' },
      { text: 'Like a nice bike ride', emoji: '🚴', category: 'activity' },
    ],
  },
  {
    minHours: 2,
    maxHours: 4,
    references: [
      { text: 'About as long as a road trip to the next city', emoji: '🚗', category: 'travel' },
      { text: 'Like binge-watching a short series', emoji: '📺', category: 'media' },
    ],
  },
  {
    minHours: 4,
    maxHours: 8,
    references: [
      { text: 'About as long as a work day', emoji: '💼', category: 'activity' },
      { text: 'Like a full night of sleep', emoji: '😴', category: 'nature' },
    ],
  },
  {
    minHours: 8,
    maxHours: 12,
    references: [
      { text: 'About as long as a cross-country flight', emoji: '✈️', category: 'travel' },
      { text: 'Like sunrise to sunset in winter', emoji: '🌅', category: 'nature' },
    ],
  },
  {
    minHours: 12,
    maxHours: 16,
    references: [
      { text: 'About as long as daylight hours in summer', emoji: '☀️', category: 'nature' },
      {
        text: 'Like watching the entire Lord of the Rings trilogy (extended)',
        emoji: '🧙',
        category: 'media',
      },
    ],
  },
  {
    minHours: 16,
    maxHours: 24,
    references: [
      { text: 'Almost a full day — impressive!', emoji: '🌍', category: 'nature' },
      { text: 'Like a full day of hiking', emoji: '🥾', category: 'activity' },
    ],
  },
  {
    minHours: 24,
    maxHours: 48,
    references: [
      { text: 'More than a full day!', emoji: '🏆', category: 'nature' },
      { text: 'Like a weekend camping trip', emoji: '⛺', category: 'activity' },
    ],
  },
  {
    minHours: 48,
    maxHours: Infinity,
    references: [
      { text: 'An extraordinary duration — you are incredible!', emoji: '🌟', category: 'nature' },
    ],
  },
];

const FALLBACK: TimeReference = {
  text: 'A meaningful amount of time',
  emoji: '⏳',
  category: 'nature',
};

const customRegistry: TimeRangeEntry[] = [];

function findReferences(hours: number, custom: TimeRangeEntry[]): TimeReference[] {
  for (const entry of custom) {
    if (hours >= entry.minHours && hours < entry.maxHours) {
      return entry.references;
    }
  }
  for (const entry of DEFAULT_DATABASE) {
    if (hours >= entry.minHours && hours < entry.maxHours) {
      return entry.references;
    }
  }
  return [FALLBACK];
}

export function getTimeReference(elapsedHours: number): TimeReference {
  const refs = findReferences(Math.max(0, elapsedHours), customRegistry);
  const index = Math.floor(Math.random() * refs.length);
  return refs[index];
}

export function getEpisodeComparison(
  elapsedHours: number,
  showName = 'The Office',
  episodeMins = 22
): string {
  const totalMins = elapsedHours * 60;
  const episodes = Math.round(totalMins / episodeMins);
  if (episodes <= 0) return `Less than one episode of ${showName}`;
  if (episodes === 1) return `About 1 episode of ${showName}`;
  return `About ${episodes} episodes of ${showName}`;
}

export function getEncouragingMessage(elapsedHours: number): string {
  if (elapsedHours < 1) return 'Every minute counts — great start!';
  if (elapsedHours < 4) return 'You are building momentum — keep going!';
  if (elapsedHours < 8) return 'Impressive dedication — halfway through the day!';
  if (elapsedHours < 16) return 'Amazing endurance — you are a champion!';
  if (elapsedHours < 24) return 'Nearly a full day — extraordinary commitment!';
  return 'Beyond a full day — you are truly remarkable!';
}

export function registerReferences(entries: TimeRangeEntry[]): void {
  customRegistry.push(...entries);
}

export function clearCustomReferences(): void {
  customRegistry.length = 0;
}