// Execute selected core HUD functions with engine-value shims.
// Persistent AFK ownership/countdown behavior is covered by check_afk.mjs.
// These checks are not a GSC VM, compiler, linker, or live layout test.
// Common visibility helpers are stubbed here and executed directly by check_hud.
import assert from 'node:assert/strict';
import { readFileSync } from 'node:fs';
import vm from 'node:vm';
const root = new URL('../', import.meta.url);
let checks = 0;
function check(name, fn) { fn(); checks++; console.log(name); }
function body(source, name) {
  const match = new RegExp(`^${name}\\(([^\\n]*)\\)\\s*\\n\\{`, 'm').exec(source);
  assert(match, name);
  let at = match.index + match[0].length, end = at, depth = 1;
  while (depth) {
    assert(end < source.length, `unclosed ${name}`);
    const ch = source[end++];
    if (ch === '{') depth++;
    if (ch === '}') depth--;
  }
  return [match[1], source.slice(at, end - 1)];
}
function install(context, source, names) {
  for (const name of names) {
    const [args, original] = body(source, name);
    let code = original.replace(/\/\/[^\n]*/g, '');
    const locals = [...new Set([...code.matchAll(/(?<![\w.])(\w+)\s*(?:=(?!=)|\+\+|--)/g)].map(match => match[1]))];
    code = code.replace(/(?:self|level) endon\([^;]+;/g, '')
      .replace(/scripts\\(?:sp|zm)\\tws_t[56]_common::/g, 'common.')
      .replace(/maps\\mp\\zombies\\_zm_utility::get_current_zombie_count/g, 'get_enemy_count')
      .replace(/self thread ([\w.]+)\(([^;]*)\);/g, (_, fn, values) => `queued.push(['${fn}', ${values}]);`)
      .replace(/self common\.toggle_core_hud\(\)/g, 'common.toggle_core_hud()')
      .replace(/self ((?:hud_|afk_)\w+)\(/g, '$1(')
      .replace(/self (\w+)\(/g, 'self.$1(')
      .replace(/(\w+) (SetText|SetTextUnlimited|SetValue|SetTimerUp|SetShader)\(([^;]*)\);/g, '$1.$2($3);')
      .replace(/level notify\(([^;]*)\);/g, 'level.notify($1);')
      .replace(/level waittill\(([^;]*)\);/g, 'yield { event: $1 };')
      .replace(/\.size\b/g, '.length')
      .replace(/\((\d+\.\d+), (\d+\.\d+), (\d+\.\d+)\)/g, '[$1, $2, $3]')
      .replace(/\bwait\s+([^;]+);/g, 'yield $1;');
    vm.runInContext(`function${code.includes('yield ') ? '*' : ''} ${name}(${args}) { var ${locals.join(', ') || 'unused'}; ${code} }`, context);
  }
}
function engine(game, source, afk, hidden = false) {
  const queued = [], elems = [], actions = [];
  let now = 123456;
  const self = { active: true };
  if (hidden) self.tws_hud_hidden = true;
  for (const name of ['enableInvulnerability', 'disableInvulnerability', 'freezeControls',
    'disableWeapons', 'disableOffhandWeapons', 'enableWeapons', 'enableOffhandWeapons', 'iPrintLnBold']) {
    self[name] = (...args) => actions.push([name, ...args]);
  }
  function element(args, alpha = 1) {
    const result = { args, alpha, writes: [],
      SetText(value) { this.text = value; this.writes.push(['text', value]); },
      SetTextUnlimited(value) { this.text = value; this.writes.push(['unlimitedText', value]); },
      SetValue(value) { this.value = value; this.writes.push(['value', value]); },
      SetShader(...args) { this.shader = args; },
      SetTimerUp(value) { this.timer = value; this.writes.push(['timer', value]); },
    };
    elems.push(result);
    return result;
  }
  function register(player, elem) {
    (player.tws_core_hud_elems ??= []).push(elem);
    common.set_core_alpha(player, elem, elem.alpha);
    return elem;
  }
  const common = {
    make_core_overlay_text: (...args) => register(args[0], element(args)),
    make_core_overlay_shader: (...args) => register(args[0], element(args, args[6])),
    make_overlay_width: width => Math.trunc(Math.max(1, width)),
    set_core_alpha(player, elem, alpha) {
      if (!elem) return;
      elem.tws_core_alpha = alpha;
      elem.alpha = player.tws_hud_hidden ? 0 : alpha;
    },
    toggle_core_hud() {
      self.tws_hud_hidden = !self.tws_hud_hidden;
      for (const elem of self.tws_core_hud_elems ?? []) common.set_core_alpha(self, elem, elem.tws_core_alpha);
    },
    player_active: player => player.active,
    format_mmss: ms => `${Math.floor(ms / 60000)}:${String(Math.floor(ms / 1000) % 60).padStart(2, '0')}`,
  };
  const level = { round_number: 1, hud_rate: .1, afk_grace_seconds: 2, zombie_team: 'axis',
    hud_overlay_timer_x: 6, hud_overlay_match_y: 8, hud_overlay_round_y: 30,
    hud_overlay_brand_x: 320, hud_overlay_brand_y: 8,
    hud_overlay_count_x: 300, hud_overlay_count_y: 440,
    hud_overlay_count_label_x: 306, hud_overlay_count_label_y: 446,
    hud_overlay_bar_x: 242, hud_overlay_bar_y: 466,
    hud_overlay_bar_width: 156, hud_overlay_bar_height: 4,
    hud_overlay_health_y: 460, hud_overlay_health_x: 414, hud_overlay_slash_x: 418,
    hud_overlay_maxhealth_x: 445, hud_overlay_hp_x: 449,
    hud_overlay_afk_x: 320, hud_overlay_afk_y: 421,
    hud_c_count: 'white', hud_c_dim: 'dim', hud_c_afk: 'yellow',
    hud_c_high: 'green', hud_c_mid: 'yellow', hud_c_low: 'red', notify() {} };
  const context = vm.createContext({ self, level, common, queued, getTime: () => now,
    get_enemy_count: () => level.fixture_enemies ?? 0,
    isDefined: value => value !== undefined && value !== null, is_true: value => !!value,
    int: Math.trunc, max: Math.max });
  install(context, source, ['hud_connect', 'hud_text', 'hud_start', 'hud_toggle', 'hud_timer_row',
    'hud_health_display', 'hud_zombie_counter', 'freeze_timers_on_game_over']);
  return { context, self, level, queued, elems, actions, common,
    setTime(value) { now = value; },
    spawnAfk() { const watcher = context.afk_spawn(); watcher?.next(); return watcher; },
  };
}
for (const game of ['t5', 't6']) {
  const source = readFileSync(new URL(`${game}/scripts/tws_${game}_hud.gsc`, root), 'utf8');
  const afk = readFileSync(new URL(`${game}/scripts/tws_${game}_afk.gsc`, root), 'utf8');
  const make = hidden => engine(game, source, afk, hidden);
  check(`${game}: native .hud chat and shared lifecycle retain engine-specific clock seeds`, () => {
    assert(source.includes('register_help_command(".hud", "Toggle core HUD")'));
    assert(source.includes('register_connect_handler(::hud_connect)'));
    assert(source.includes('register_spawn_handler(::hud_start)'));
    assert(!source.includes('waittill("connected"'));
    const chat = body(source, 'hud_chat_listener')[1];
    assert(chat.includes('level waittill("say", message, player)'));
    assert(chat.includes('toLower(message) == ".hud"'));
    assert(chat.includes('player thread hud_toggle()'), 'disconnect scope stays in the player worker');
    assert(!body(source, 'hud_connect')[1].includes('getTime()'));
    assert(!source.includes('tws_hud_hidden ='), 'spawn/construction must not reset the preference');
    for (const name of ['round_watcher', 'reset_timer_each_round', 'match_timer_bind', 'hud_zombie_counter'])
      assert(body(source, name)[1].includes('level endon("hud_game_over")'));
    const bind = body(source, 'match_timer_bind')[1];
    if (game === 't5') assert(bind.includes('elem SetTimerUp(0)'));
    else assert(bind.includes('(getTime() - level.match_start_time) / 1000.0'));
    assert(afk.includes('NewClientHudElem(self)'), 'protection countdown is an independent critical HUD');
    assert(!afk.includes('set_core_alpha'), 'hiding the optional HUD must not hide the protection deadline');
  });
  check(`${game}: connection places 10 box-free core elements at the screen edges without seeding clocks`, () => {
    const e = make(); e.context.hud_connect();
    assert.equal(e.level.match_start_time, undefined); assert.equal(e.level.round_start_time, undefined);
    assert.equal(e.self.tws_hud_match.text, '--:--'); assert.equal(e.self.tws_hud_health.text, '--');
    assert.equal(e.elems.length, 10);
    assert.equal(e.self.tws_core_hud_elems.length, 10);
    e.context.hud_connect(); assert.equal(e.elems.length, 10);
    assert.equal(e.queued.length, 1); assert.equal(e.queued[0][0], 'common.destroy_on_disconnect');
    assert.equal(e.queued[0][1].length, e.elems.length);
    const textAt = (text, x, y, align, scale, colour) => {
      const elem = e.elems.find(item => item.text === text);
      assert(elem, text); assert.deepEqual(elem.args.slice(1), [x, y, align, scale, colour]);
    };
    assert.deepEqual(e.self.tws_hud_match.args.slice(1), [6, 8, 'left', 1.4, 'white']);
    assert.deepEqual(e.self.tws_hud_round.args.slice(1), [6, 30, 'left', 1.25, 'dim']);
    textAt('TWS ZOMBIES  |  discord.tws.lol', 320, 8, 'center', 1.1, 'dim');
    textAt('-- ZOMBIES', 320, 440, 'center', 1.25, 'white');
    assert(!e.elems.some(elem => elem.text === 'ZOMBIES'), 'count and label share one alignment');
    textAt('HP', 449, 460, 'left', 1, 'white');
    for (const [key, x, align] of [['health', 414, 'right'], ['slash', 418, 'left'], ['maxhealth', 445, 'right']]) {
      const elem = e.self[`tws_hud_${key}`];
      assert.deepEqual(elem.args.slice(1), [x, 460, align, 1, 'white']);
      assert.equal(elem.alpha, 0); assert.equal(elem.tws_core_alpha, 0);
    }
    assert.equal(e.self.tws_hud_hp.alpha, 0);
    const shaders = e.elems.filter(elem => elem.args.length === 8);
    assert.equal(shaders.length, 2, 'only the health track and fill allocate shaders');
    for (const elem of shaders) assert.deepEqual(elem.args.slice(1, 5), [242, 466, 156, 4]);
    assert.equal(shaders[0].alpha, .8); assert.equal(shaders[1].alpha, 0);
    assert(!e.elems.some(elem => elem.text === 'MATCH' || elem.text === 'ROUND'));
  });
  check(`${game}: toggling before first spawn preserves hidden state and binds workers once`, () => {
    const e = make(); e.context.hud_toggle();
    assert.equal(e.self.tws_hud_hidden, true);
    assert(e.elems.every(elem => elem.alpha === 0));
    assert.equal(e.level.match_start_time, undefined); assert.equal(e.level.round_start_time, undefined);
    assert.equal(e.queued.length, 1, 'toggle only queues disconnect cleanup');
    e.context.hud_start(); e.context.hud_start();
    assert.equal(e.elems.length, 10); assert.equal(e.self.tws_hud_hidden, true);
    assert.deepEqual(e.queued.slice(1).map(item => item[0]), ['hud_timer_row', 'hud_zombie_counter', 'hud_health_display']);
    e.context.hud_timer_row();
    assert.equal(e.level.match_start_time, 123456); assert.equal(e.level.round_start_time, 123456);
    const threads = e.queued.length;
    e.context.hud_toggle(); e.context.hud_toggle(); e.context.hud_start();
    assert.equal(e.queued.length, threads); assert.equal(e.elems.length, 10);
  });
  check(`${game}: complete zombie text stays centered through digit changes and hidden updates without config-string churn`, () => {
    const e = make();
    // Center on the configured track, including non-default and fractional midpoints.
    e.level.hud_overlay_bar_x = 210;
    e.level.hud_overlay_bar_width = 155;
    e.context.hud_connect();
    const count = e.self.tws_hud_count;
    assert.deepEqual(count.args.slice(1, 4), [287.5, 440, 'center']);
    const run = e.context.hud_zombie_counter();
    for (const value of [0, 6, 9, 10, 99, 100, 999, 1000, 6]) {
      e.level.fixture_enemies = value;
      run.next();
      assert.equal(count.text, `${value} ZOMBIES`);
      assert.deepEqual(count.args.slice(1, 4), [287.5, 440, 'center']);
      const writes = count.writes.length;
      run.next(); assert.equal(count.writes.length, writes, 'unchanged counts do not rewrite text');
    }
    e.level.zombie_total = 94; run.next();
    assert.equal(count.text, '100 ZOMBIES', 'remaining spawn count remains included');
    e.context.hud_toggle();
    e.level.zombie_total = -4; run.next();
    assert.equal(count.text, '6 ZOMBIES'); assert.equal(count.alpha, 0);
    e.context.hud_toggle();
    assert.equal(count.text, '6 ZOMBIES'); assert.equal(count.alpha, 1);
    assert.equal(count.writes.filter(([kind]) => kind === 'text').length, 1,
      'only the fixed placeholder uses a normal config string');
    assert(count.writes.slice(1).every(([kind]) => kind === 'unlimitedText'));
    assert.equal(e.elems.length, 10, 'updates and toggles never allocate replacement elements');
  });
  check(`${game}: health numbers appear only while damaged, follow the bar colour, and avoid config-string churn`, () => {
    const e = make(); e.context.hud_connect(); const { self } = e;
    const numbers = [self.tws_hud_health, self.tws_hud_slash, self.tws_hud_maxhealth, self.tws_hud_hp];
    const run = e.context.hud_health_display(); run.next();
    assert(numbers.every(elem => elem.alpha === 0), 'undefined health does not flash a damage readout');
    assert.equal(self.health, undefined); assert.equal(self.maxhealth, undefined);
    self.health = 100; run.next();
    assert.equal(self.tws_hud_health.value, 100); assert.equal(self.tws_hud_maxhealth.value, 100);
    assert(numbers.every(elem => elem.alpha === 0));
    assert.equal(self.tws_hud_bar.alpha, 1); assert.equal(self.tws_hud_bar.shader[1], 156);
    const writes = self.tws_hud_health.writes.length; run.next(); assert.equal(self.tws_hud_health.writes.length, writes);
    self.health = 35; run.next();
    assert(numbers.every(elem => elem.alpha === 1 && elem.color === 'yellow'));
    assert.equal(self.tws_hud_health.value, 35); assert.equal(self.tws_hud_bar.shader[1], 54);
    self.maxhealth = 250; self.health = 50; run.next();
    assert.equal(self.tws_hud_maxhealth.value, 250); assert.equal(self.tws_hud_bar.shader[1], 31);
    assert(numbers.every(elem => elem.alpha === 1 && elem.color === 'red'));
    assert.equal(self.tws_hud_bar.color, 'red');
    self.health = 0; run.next(); assert.equal(self.tws_hud_bar.alpha, 0); assert.equal(self.tws_hud_health.value, 0);
    assert(numbers.every(elem => elem.alpha === 1));
    self.health = 250; run.next(); assert.equal(self.tws_hud_bar.alpha, 1); assert.equal(self.tws_hud_bar.color, 'green');
    assert(numbers.every(elem => elem.alpha === 0 && elem.tws_core_alpha === 0));
    self.health = 500; run.next(); assert.equal(self.tws_hud_bar.shader[1], 156);
    assert(numbers.every(elem => elem.alpha === 0), 'overheal must not show the damage readout');
    self.maxhealth = 0; self.health = 100; run.next();
    assert.equal(self.maxhealth, 0, 'invalid maximum is display-only fallback');
    assert.equal(self.tws_hud_maxhealth.value, 100); assert(numbers.every(elem => elem.alpha === 0));
    assert.equal(self.tws_hud_health.writes.filter(item => item[0] === 'text').length, 1);
  });
  check(`${game}: hidden health updates remain private and restore the current bar state`, () => {
    const e = make(true), other = make();
    e.context.hud_connect(); other.context.hud_connect();
    e.self.health = 100; const run = e.context.hud_health_display(); run.next();
    assert(e.elems.every(elem => elem.alpha === 0));
    assert.equal(e.self.tws_hud_bar.tws_core_alpha, 1);
    e.self.health = 0; run.next(); e.context.hud_toggle();
    assert.equal(e.self.tws_hud_health.value, 0); assert.equal(e.self.tws_hud_bar.alpha, 0);
    assert.equal(e.elems[0].alpha, 1); assert.equal(e.elems.at(-2).alpha, .8);
    e.context.hud_toggle(); e.self.health = 50; run.next();
    assert.equal(e.self.tws_hud_bar.alpha, 0); assert.equal(e.self.tws_hud_bar.shader[1], 78);
    e.context.hud_toggle();
    assert.equal(e.self.tws_hud_bar.alpha, 1); assert.equal(e.self.tws_hud_health.value, 50);
    assert.equal(other.self.tws_hud_hidden, undefined); assert.equal(other.self.tws_hud_health.alpha, 0);
    assert.equal(e.elems.length, 10); assert.equal(e.queued.length, 1);
    e.context.hud_toggle(); e.self.health = 100; run.next(); e.context.hud_toggle();
    assert.equal(e.self.tws_hud_health.alpha, 0, 'healing while hidden conceals the readout when shown');
    assert.equal(e.self.tws_hud_hp.alpha, 0); assert.equal(e.self.tws_hud_bar.alpha, 1);
  });
  check(`${game}: toggling frozen clocks does not restart or reseed them`, () => {
    const e = make(); e.context.hud_start(); e.context.hud_timer_row();
    const match = e.self.tws_hud_match, round = e.self.tws_hud_round;
    const freeze = e.context.freeze_timers_on_game_over(match, round);
    assert.equal(freeze.next().value.event, 'hud_game_over');
    e.context.hud_toggle(); e.setTime(248456); e.level.tws_ended = true; freeze.next();
    assert.equal(match.text, '2:05'); assert.equal(round.text, '2:05');
    const before = JSON.stringify([match.writes, round.writes, e.queued.map(item => item[0])]);
    e.setTime(999999); e.context.hud_toggle(); e.context.hud_start();
    assert.equal(match.alpha, 1); assert.equal(round.alpha, 1);
    assert.equal(JSON.stringify([match.writes, round.writes, e.queued.map(item => item[0])]), before);
    assert.equal(e.level.match_start_time, 123456); assert.equal(e.level.round_start_time, 123456);
  });

}
console.log(`${checks} core HUD fixture checks passed (transpiled subset, not a GSC VM).`);