hud.js

#!/usr/bin/env node
// CodeDungeon HUD - StatusLine renderer
// Reads state.json and outputs one line of game HUD

const fs = require('fs');
const path = require('path');

const STATE_FILE = path.join(__dirname, 'state.json');

function main() {
  let state;
  try {
    state = JSON.parse(fs.readFileSync(STATE_FILE, 'utf8'));
  } catch {
    // No state yet or error - output nothing, let fallback handle it
    process.exit(0);
  }

  if (!state.enabled) {
    // Game disabled - output empty so claude-hud fallback can work
    // Or output a minimal indicator
    process.stdout.write('');
    return;
  }

  if (!state.alive) {
    process.stdout.write(
      `\u{1F480} B${state.dungeon.floor}\u00B7${state.dungeon.floorName} | ` +
      `\u2620\uFE0F \u51FB\u6740${state.stats.kills} | ` +
      `restart / legacy`
    );
    return;
  }

  const c = state.character;
  const d = state.dungeon;

  // Combat state
  if (state.combat) {
    const mon = state.combat.monster;
    const prefix = mon.isBoss ? '\u{1F479}' : '\u2694\uFE0F';
    const monInfo = `${mon.name}(\u2665${mon.currentHp})`;
    process.stdout.write(
      `${prefix} B${d.floor} | ` +
      `\u2764\uFE0F${c.hp} \u26A1${c.mp} | ` +
      `${monInfo} | ` +
      `fight\u00B7flee\u00B7spell\u00B7item`
    );
    return;
  }

  // Event state
  if (state.event) {
    const evtEmoji = '\u2753';
    process.stdout.write(
      `${evtEmoji} B${d.floor} | ` +
      `\u2764\uFE0F${c.hp} | ` +
      `\u4E8B\u4EF6\u5F85\u5904\u7406(${state.event.stepsLeft}\u6B65)`
    );
    return;
  }

  // Check if at floor end (stairs available)
  const atEnd = d.roomIndex >= d.rooms.length - 1 && d.rooms[d.roomIndex] && d.rooms[d.roomIndex].explored;

  // Normal exploration
  const room = d.rooms[d.roomIndex];
  let roomDesc = '';
  if (room) {
    const descs = {
      entrance: '\u5165\u53E3',
      empty: '\u5E7D\u6697\u8D70\u5ECA',
      monster: '\u602A\u7269\u623F',
      chest: '\u5B9D\u7BB1\u623F',
      trap: '\u9677\u9631',
      shop: '\u{1F3EA}\u5546\u5E97',
      rest: '\u{1F525}\u7BC0\u706B',
      event: '\u795E\u79D8\u4E8B\u4EF6',
      boss: '\u{1F479}Boss'
    };
    roomDesc = descs[room.type] || '';
  }

  const invCount = state.inventory.length;
  const bagInfo = `\u{1F392}${invCount}/${state.bagSize}`;
  const floorInfo = `\u{1F3F0} B${d.floor}\u00B7${d.floorName}`;
  const statsInfo = `\u2764\uFE0F${c.hp} \u2694\uFE0F${c.atk} \u{1F6E1}${getEffDef(state)}`;
  const goldInfo = `\u{1FA99}${c.gold}`;
  const levelInfo = `Lv.${c.level}`;

  let line = `${floorInfo} | ${statsInfo} | ${goldInfo} ${bagInfo} | ${levelInfo}`;

  if (atEnd) {
    line += ' | \u{1FA9C}\u697C\u68AF\u2192descend';
  } else if (roomDesc) {
    line += ` | ${roomDesc}`;
  }

  process.stdout.write(line);
}

function getEffDef(state) {
  let def = state.character.def;
  if (state.equipment.armor) def += state.equipment.armor.stats.def || 0;
  if (state.equipment.accessory && state.equipment.accessory.stats.def) def += state.equipment.accessory.stats.def;
  return Math.max(0, def);
}

main();