// @vitest-environment happy-dom
import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
import type { GameData, SimSnapshot } from '../contracts';
import { createFax } from './fax';

const DATA: GameData = {
  items: [
    { id: 'melt', name: 'MELT', codex: '', tier: 2, color: '#ff7a3f' },
    { id: 'anchor-slab', name: 'I-FRAME', codex: '', tier: 1, color: '#fff2a0' },
    { id: 'hf-dust', name: 'HF DUST', codex: '', tier: 1, color: '#e8e0ff' },
  ],
  machines: [],
  recipes: [],
  tech: [],
  commissions: [
    { id: 'first-taste', flavor: 'One (1) unit of MELT.', wants: { melt: 1 }, rewardBandwidth: 50 },
    { id: 'dust-allowance', flavor: 'Dust. Weekly.', wants: { 'hf-dust': 5 }, rewardBandwidth: 20, repeat: true },
    { id: 'patio-resurfacing', flavor: 'Bricks.', wants: { melt: 9 }, rewardBandwidth: 30 },
  ],
};

function snap(over: Partial<SimSnapshot> = {}): SimSnapshot {
  return {
    tick: 0, paused: false, entities: [], beltItems: [],
    bandwidth: { gen: 0, draw: 0, stored: 0, brownout: false },
    shippedTotal: {}, activeCommission: 'first-taste', commissionProgress: {}, ...over,
  };
}

const q = (el: HTMLElement, s: string) => el.querySelector(s) as HTMLElement;
const on = (el: HTMLElement, s: string) => q(el, s).classList.contains('is-on');

describe('fax stamp lifecycle', () => {
  beforeEach(() => vi.useFakeTimers());
  afterEach(() => vi.useRealTimers());

  it('is not stamped until a commission completes', () => {
    const fax = createFax(DATA);
    expect(on(fax.el, '.fk-fax-stamp')).toBe(false);
  });

  it('stamps on demand and clears itself after the animation', () => {
    const fax = createFax(DATA);
    fax.stamp();
    expect(on(fax.el, '.fk-fax-stamp')).toBe(true);

    vi.advanceTimersByTime(1799);
    expect(on(fax.el, '.fk-fax-stamp')).toBe(true); // still landed
    vi.advanceTimersByTime(1);
    expect(on(fax.el, '.fk-fax-stamp')).toBe(false);
  });

  it('restarts cleanly when two commissions complete back to back', () => {
    const fax = createFax(DATA);
    fax.stamp();
    vi.advanceTimersByTime(1000);
    fax.stamp(); // second order lands mid-animation
    vi.advanceTimersByTime(1000);
    // The first stamp's timer must not clear the second one early.
    expect(on(fax.el, '.fk-fax-stamp')).toBe(true);
    vi.advanceTimersByTime(800);
    expect(on(fax.el, '.fk-fax-stamp')).toBe(false);
  });
});

describe('fax panel', () => {
  it('stays shut when there is no active commission', () => {
    const fax = createFax(DATA);
    fax.update(snap({ activeCommission: null }));
    expect(fax.el.classList.contains('is-open')).toBe(false);
  });

  it('shows the active commission flavor, wants and reward', () => {
    const fax = createFax(DATA);
    fax.update(snap({ commissionProgress: { melt: 0 } }));
    expect(fax.el.classList.contains('is-open')).toBe(true);
    expect(q(fax.el, '.fk-fax-flavor').textContent).toBe('One (1) unit of MELT.');
    expect(q(fax.el, '.fk-chip').textContent).toBe('MELT0/1');
    expect(fax.el.textContent).toContain('+50 BANDWIDTH');
  });

  it('stamps STANDING ORDER only for a repeat commission', () => {
    const fax = createFax(DATA);
    fax.update(snap());
    expect(on(fax.el, '.fk-fax-standing')).toBe(false);
    fax.update(snap({ activeCommission: 'dust-allowance' }));
    expect(on(fax.el, '.fk-fax-standing')).toBe(true);
  });

  it('shows SANITISING only once anchor-slabs have actually shipped', () => {
    const fax = createFax(DATA);
    fax.update(snap());
    expect(on(fax.el, '.fk-san')).toBe(false);
    fax.update(snap({ shippedTotal: { 'anchor-slab': 4 } }));
    expect(on(fax.el, '.fk-san')).toBe(true);
    expect(q(fax.el, '.fk-san .fk-chip').textContent).toBe('I-FRAME4');
  });
});

describe('NEXT IN TRAY', () => {
  it('reads snap.commissionQueue as truth: active first, next is queue[1]', () => {
    const fax = createFax(DATA);
    fax.update(snap({
      activeCommission: 'first-taste',
      commissionQueue: ['first-taste', 'patio-resurfacing', 'dust-allowance'],
    }));
    expect(on(fax.el, '.fk-fax-next')).toBe(true);
    expect(q(fax.el, '.fk-fax-next-name').textContent).toBe('PATIO RESURFACING');
  });

  it('follows the queue after a standing order is re-queued to the back', () => {
    // The exact case the data-order fallback gets wrong.
    const fax = createFax(DATA);
    fax.update(snap({
      activeCommission: 'patio-resurfacing',
      commissionQueue: ['patio-resurfacing', 'dust-allowance'],
    }));
    expect(q(fax.el, '.fk-fax-next-name').textContent).toBe('DUST ALLOWANCE');
  });

  it('hides the peek when the queue holds nothing but the active order', () => {
    const fax = createFax(DATA);
    fax.update(snap({ activeCommission: 'first-taste', commissionQueue: ['first-taste'] }));
    expect(on(fax.el, '.fk-fax-next')).toBe(false);
  });

  it('shows no peek at all rather than guessing when the queue is absent', () => {
    // The round-2 fallback inferred "next" from data order; it was wrong as soon as a
    // standing order was re-queued to the back. A silent fax beats a lying one.
    const fax = createFax(DATA);
    fax.update(snap({ activeCommission: 'first-taste' }));
    expect(on(fax.el, '.fk-fax-next')).toBe(false);
  });
});