cactoz.su/frontend/js/game/battle.js

import { ClientMessage, ServerMessage } from './protocol.js';
import { returnToLobbyContainer, leaveRoomAndReturn } from './lobby.js';

const TILE_PX = 32;
// Quintus транслирует и вращает контекст сам (Sprite.render -> matrix.setContextTransform)
// на основе p.x/p.y/p.angle — draw() получает уже трансформированный контекст
// и должен рисовать спрайт центрированным в (0,0), без своих translate/rotate.
const DIR_DEGREES = { up: 0, right: 90, down: 180, left: 270 };

let Q = null;
let net = null;
let myPlayerId = null;
let stage = null;
let tankSprites = new Map();
let bulletSprites = new Map();
let baseSprite = null;
let lastSentInput = null;
let seq = 0;
let polling = false;

function tankColor(p) {
  if (p.isAi) return '#0a8f2c';
  return p.isMe ? '#00ff41' : '#9fa3a0';
}

function setupEntities() {
  Q.Sprite.extend('Tank', {
    init(p) {
      this._super(p, { w: 24, h: 24, renderAlways: true });
    },
    draw(ctx) {
      const p = this.p;
      const color = tankColor(p);

      // корпус
      ctx.fillStyle = color;
      ctx.fillRect(-p.w / 2, -p.h / 2, p.w, p.h);

      // гусеницы по бокам
      ctx.fillStyle = '#0a0e0c';
      ctx.fillRect(-p.w / 2, -p.h / 2, 3, p.h);
      ctx.fillRect(p.w / 2 - 3, -p.h / 2, 3, p.h);

      // башня
      ctx.beginPath();
      ctx.arc(0, 0, p.w / 2 - 5, 0, Math.PI * 2);
      ctx.fillStyle = color;
      ctx.fill();
      ctx.lineWidth = 1.5;
      ctx.strokeStyle = '#0a0e0c';
      ctx.stroke();

      // ствол — явно торчит вперёд по направлению взгляда (локально «вверх»)
      ctx.fillStyle = '#0a0e0c';
      ctx.fillRect(-2.5, -p.h / 2 - 12, 5, 16);
    },
  });

  Q.Sprite.extend('Bullet', {
    init(p) {
      this._super(p, { w: 8, h: 8, renderAlways: true });
    },
    draw(ctx) {
      ctx.fillStyle = '#c7c7c7';
      ctx.beginPath();
      ctx.arc(0, 0, this.p.w / 2, 0, Math.PI * 2);
      ctx.fill();
    },
  });

  Q.Sprite.extend('Wall', {
    init(p) {
      this._super(p, { w: TILE_PX, h: TILE_PX });
    },
    draw(ctx) {
      const p = this.p;
      if (p.tile === 2) {
        ctx.fillStyle = '#9fa3a0';
        ctx.fillRect(-p.w / 2, -p.h / 2, p.w, p.h);
      } else {
        ctx.fillStyle = '#0a8f2c';
        ctx.fillRect(-p.w / 2, -p.h / 2, p.w, p.h);
        ctx.strokeStyle = '#0a0e0c';
        ctx.strokeRect(-p.w / 2 + 1, -p.h / 2 + 1, p.w - 2, p.h - 2);
      }
    },
  });

  Q.Sprite.extend('Base', {
    init(p) {
      this._super(p, { w: TILE_PX * 0.85, h: TILE_PX * 0.85, renderAlways: true });
    },
    draw(ctx) {
      const p = this.p;
      ctx.fillStyle = p.alive ? '#9fa3a0' : '#2a2d2b';
      ctx.fillRect(-p.w / 2, -p.h / 2, p.w, p.h);
      ctx.strokeStyle = '#0a0e0c';
      ctx.strokeRect(-p.w / 2 + 1, -p.h / 2 + 1, p.w - 2, p.h - 2);
      ctx.fillStyle = p.alive ? '#00ff41' : '#0a0e0c';
      ctx.beginPath();
      ctx.moveTo(0, -p.h / 2);
      ctx.lineTo(-p.w / 4, 0);
      ctx.lineTo(p.w / 4, 0);
      ctx.closePath();
      ctx.fill();
    },
  });
}

function ensureQuintus(cols, rows) {
  if (Q) {
    return;
  }
  Q = window.Quintus().include('Sprites, Scenes, 2D, Input').setup({
    width: cols * TILE_PX,
    height: rows * TILE_PX,
  });
  Q.input.keyboardControls({
    LEFT: 'left', RIGHT: 'right', UP: 'up', DOWN: 'down',
    A: 'left', D: 'right', W: 'up', S: 'down',
    SPACE: 'fire',
  });
  setupEntities();
  Q.scene('battle', (stageRef) => {
    stage = stageRef;
  });
}

function buildMap(map) {
  for (let y = 0; y < map.length; y++) {
    for (let x = 0; x < map[y].length; x++) {
      const tile = map[y][x];
      if (tile === 0) {
        continue;
      }
      stage.insert(
        new Q.Wall({
          x: x * TILE_PX + TILE_PX / 2,
          y: y * TILE_PX + TILE_PX / 2,
          tile,
        })
      );
    }
  }
}

function bindControlButtons(root) {
  const press = (input, active) => {
    if (Q) {
      Q.inputs[input] = active;
    }
  };
  root.querySelectorAll('[data-input]').forEach((btn) => {
    const input = btn.dataset.input;
    btn.addEventListener('mousedown', () => press(input, true));
    btn.addEventListener('mouseup', () => press(input, false));
    btn.addEventListener('mouseleave', () => press(input, false));
    btn.addEventListener('touchstart', (e) => {
      e.preventDefault();
      press(input, true);
    });
    btn.addEventListener('touchend', (e) => {
      e.preventDefault();
      press(input, false);
    });
  });
}

function pollInput() {
  if (!polling) {
    return;
  }
  const input = {
    seq: seq++,
    up: !!Q.inputs.up,
    down: !!Q.inputs.down,
    left: !!Q.inputs.left,
    right: !!Q.inputs.right,
    fire: !!Q.inputs.fire,
  };
  const key = `${input.up}${input.down}${input.left}${input.right}${input.fire}`;
  if (key !== lastSentInput) {
    lastSentInput = key;
    net.send(ClientMessage.GAME_INPUT, input);
  }
  requestAnimationFrame(pollInput);
}

function onState(payload) {
  const seenTanks = new Set();
  for (const t of payload.tanks) {
    seenTanks.add(t.id);
    let sprite = tankSprites.get(t.id);
    if (!sprite) {
      sprite = new Q.Tank({
        x: t.x * TILE_PX,
        y: t.y * TILE_PX,
        isMe: t.id === myPlayerId,
        isAi: !!t.is_ai,
      });
      stage.insert(sprite);
      tankSprites.set(t.id, sprite);
    }
    sprite.p.x = t.x * TILE_PX;
    sprite.p.y = t.y * TILE_PX;
    sprite.p.angle = DIR_DEGREES[t.direction] || 0;
    sprite.p.hidden = !t.alive;
  }
  for (const [id, sprite] of tankSprites) {
    if (!seenTanks.has(id)) {
      sprite.destroy();
      tankSprites.delete(id);
    }
  }

  const seenBullets = new Set();
  for (const b of payload.bullets) {
    seenBullets.add(b.id);
    let sprite = bulletSprites.get(b.id);
    if (!sprite) {
      sprite = new Q.Bullet({ x: b.x * TILE_PX, y: b.y * TILE_PX });
      stage.insert(sprite);
      bulletSprites.set(b.id, sprite);
    }
    sprite.p.x = b.x * TILE_PX;
    sprite.p.y = b.y * TILE_PX;
  }
  for (const [id, sprite] of bulletSprites) {
    if (!seenBullets.has(id)) {
      sprite.destroy();
      bulletSprites.delete(id);
    }
  }

  if (payload.base) {
    if (!baseSprite) {
      baseSprite = new Q.Base({
        x: payload.base.x * TILE_PX,
        y: payload.base.y * TILE_PX,
        alive: payload.base.alive,
      });
      stage.insert(baseSprite);
    } else {
      baseSprite.p.alive = payload.base.alive;
    }
  }
}

function onOver(payload) {
  polling = false;
  const titles = { win: 'ПОБЕДА', lose: 'ПОРАЖЕНИЕ', draw: 'НИЧЬЯ' };
  const title = titles[payload.result] || payload.result.toUpperCase();
  const overlay = document.getElementById('battle-result-overlay');
  overlay.innerHTML = `
    <div class="battle-result battle-result--${payload.result}">
      <h2 class="glitch" data-text="${title}">${title}</h2>
      <p>${payload.reason}</p>
      <div class="battle-result__actions">
        <button data-action="rematch">играть ещё</button>
        <button data-action="to-lobby">в лобби</button>
      </div>
    </div>`;
  overlay.style.display = 'flex';
}

function onOverlayClick(e) {
  const btn = e.target.closest('[data-action]');
  if (!btn) return;
  const overlay = document.getElementById('battle-result-overlay');
  overlay.style.display = 'none';
  overlay.innerHTML = '';
  if (btn.dataset.action === 'rematch') {
    returnToLobbyContainer();
  } else {
    leaveRoomAndReturn();
  }
}

export function startBattle(networkInstance, payload, ownPlayerId) {
  net = networkInstance;
  myPlayerId = ownPlayerId;

  const rows = payload.map.length;
  const cols = payload.map[0].length;

  document.getElementById('lobby').style.display = 'none';
  const container = document.getElementById('battlecity-canvas-container');
  container.style.display = 'block';
  container.innerHTML = `
    <div class="battle-layout">
      <div id="battle-canvas-slot"></div>
      <div class="battle-controls">
        <div class="dpad">
          <button class="dpad__up" data-input="up">&uarr;</button>
          <button class="dpad__left" data-input="left">&larr;</button>
          <button class="dpad__right" data-input="right">&rarr;</button>
          <button class="dpad__down" data-input="down">&darr;</button>
        </div>
        <button class="fire-btn" data-input="fire">огонь</button>
      </div>
    </div>
    <div id="battle-result-overlay"></div>`;

  ensureQuintus(cols, rows);
  document.getElementById('battle-canvas-slot').appendChild(Q.el);
  bindControlButtons(container.querySelector('.battle-controls'));
  container.querySelector('#battle-result-overlay').addEventListener('click', onOverlayClick);

  Q.stageScene('battle', 0);
  tankSprites = new Map();
  bulletSprites = new Map();
  baseSprite = null;

  buildMap(payload.map);

  net.on(ServerMessage.GAME_STATE, onState);
  net.on(ServerMessage.GAME_OVER, onOver);

  lastSentInput = null;
  seq = 0;
  polling = true;
  requestAnimationFrame(pollInput);
}