import assert from 'node:assert/strict';
import test from 'node:test';
import { readFileSync } from 'node:fs';
import { registerHooks } from 'node:module';
import { createElement } from 'react';
import { renderToStaticMarkup } from 'react-dom/server';
import { applyAction, viewGame, type Game } from '../game/engine';
import { createBattleTerritoryExplosionFixture } from './fixture-battle-territory-explosion';

const aliases = registerHooks({
  resolve(specifier, context, next) {
    return next(specifier === 'next/image' ? 'vinext/shims/image' :
      specifier === 'next/link' ? 'vinext/shims/link' : specifier, context);
  },
  load(url, context, next) {
    if (!url.endsWith('.module.css')) return next(url, context);
    const css = readFileSync(new URL(url), 'utf8');
    const classes = Object.fromEntries([...css.matchAll(/\.([a-zA-Z_][\w-]*)/g)].map(match => [match[1], match[1]]));
    return {format:'module', source:`export default ${JSON.stringify(classes)}`, shortCircuit:true};
  },
});
const { GameTable } = await import('../components/game-table');
aliases.deregister();
const render = (game: Game, actor: string, busy = false) =>
  renderToStaticMarkup(createElement(GameTable, {game:viewGame(game, actor), busy,
    send:async () => { assert.fail('Reading the announcement must not submit an action.'); }, onExit() {}}));

/** Public Basic setup, native shipments and a completed first battle create
 * the real second Guild/Emperor fight. Stage only Guild's leader availability
 * and a conserved Hero hand transfer when needed for the paired control. */
function ready(cheapHero: boolean) {
  const f = createBattleTerritoryExplosionFixture({advanced:false});
  const game = structuredClone(f.game);
  assert.equal(game.advanced,false); assert.ok(game.battle && !game.battle.revealed);
  assert.deepEqual(new Set([game.battle.attacker,game.battle.defender]),new Set(['guild','emperor']));
  const guild = game.players.find(player => player.id === 'guild'); assert.ok(guild);
  // These living discs were already used in another territory; no deaths or
  // replacements are fabricated. The first real battle remains in history.
  for (const leader of guild.leaders) leader.usedAt = 'carthag';
  if (cheapHero) {
    let hero = guild.hand.find(card => card.kind === 'hero');
    if (!hero) {
      for (const zone of [game.deck,game.discard,...game.players.filter(player => player.id !== 'guild').map(player => player.hand)]) {
        const index = zone.findIndex(card => card.kind === 'hero');
        if (index >= 0) { [hero] = zone.splice(index,1); guild.hand.push(hero); break; }
      }
    }
    assert.ok(hero,'One real physical Cheap Hero must be available');
    return {game, hero:hero.id};
  }
  // A real cheap hero held by Guild would make a null leader illegal; return
  // any such card to the original deck rather than deleting it.
  const heroes = guild.hand.filter(card => card.kind === 'hero');
  guild.hand = guild.hand.filter(card => card.kind !== 'hero');
  game.deck.push(...heroes);
  return {game,hero:null};
}

void test('a Basic sealed leaderless plan announces publicly and keeps the plan private across rendering and reload', () => {
  const f = ready(false);
  const game = applyAction(f.game,'guild',{type:'battlePlan',dial:1,support:0,leader:null,weapon:null,defense:null});
  assert.ok(game.battle && !game.battle.revealed);
  assert.deepEqual(game.battle.basicLeaderlessAnnouncements,['guild']);
  assert.equal(viewGame(game,'guild').battle!.plans.guild.dial,1);
  for (const id of ['emperor','atreides']) {
    const view = viewGame(game,id);
    assert.deepEqual(view.battle!.leaderless,['guild']);
    assert.deepEqual(view.battle!.plans,{});
    assert.deepEqual(view.battle!.cards,[]);
    for (const busy of [false,true]) {
      const html = render(game,id,busy);
      assert.match(html,/Guild announced a Battle Plan without a leader or Cheap Hero\./);
      assert.match(html,/No battle cards can be played; other plan choices remain sealed\./);
    }
  }
  const saved = JSON.stringify(game), restored = JSON.parse(saved) as Game;
  assert.deepEqual(viewGame(restored,'emperor').battle!.leaderless,['guild']);
  assert.match(render(restored,'atreides'),/Guild announced a Battle Plan without a leader or Cheap Hero\./);
  assert.equal(JSON.stringify(restored),saved);
});

void test('a real Cheap Hero plan does not announce the faction as leaderless', () => {
  const f = ready(true); assert.ok(f.hero);
  const game = applyAction(f.game,'guild',{type:'battlePlan',dial:1,support:0,leader:f.hero,weapon:null,defense:null});
  assert.ok(game.battle && !game.battle.revealed);
  assert.ok(!game.battle.basicLeaderlessAnnouncements?.includes('guild'));
  for (const id of ['emperor','atreides']) {
    const view = viewGame(game,id);
    assert.deepEqual(view.battle!.leaderless,[]);
    assert.deepEqual(view.battle!.plans,{});
    assert.deepEqual(view.battle!.cards,[]);
    assert.doesNotMatch(render(game,id),/Guild announced a Battle Plan without a leader or Cheap Hero/);
  }
});