'use strict';

const test = require('node:test');
const assert = require('node:assert');
const { Vec3 } = require('vec3');

const { scanWaterAhead, isWaterName, BoatState } = require('../src/bot/autoBoat');
const { FakeBot } = require('./helpers/fakeBot');

/**
 * 构造一个「前方全是水」的假世界。
 * @param {FakeBot} bot
 * @param {(x: number, z: number) => boolean} isWater
 */
function fillWorld(bot, isWater, y) {
  const level = y === undefined ? 63 : y;
  for (let x = -40; x <= 40; x++) {
    for (let z = -40; z <= 40; z++) {
      for (const dy of [-1, 0]) {
        bot.blockMap.set(`${x},${level + dy},${z}`, {
          name: isWater(x, z) ? 'water' : 'stone',
          boundingBox: 'block'
        });
      }
    }
  }
}

test('isWaterName 识别水与气泡柱', () => {
  assert.strictEqual(isWaterName('water'), true);
  assert.strictEqual(isWaterName('flowing_water'), true);
  assert.strictEqual(isWaterName('bubble_column'), true);
  assert.strictEqual(isWaterName('stone'), false);
  assert.strictEqual(isWaterName(''), false);
  assert.strictEqual(isWaterName(null), false);
});

test('前方开阔水域达到长度与宽度阈值时建议用船', () => {
  const bot = new FakeBot({ x: 0, y: 64, z: 0 });
  // x 从 1 到 30 全是水，其余为石头
  fillWorld(bot, (x) => x >= 1 && x <= 30);
  const scan = scanWaterAhead(bot, 1, 0, 6, 4);
  assert.strictEqual(scan.ok, true, scan.reason);
  assert.ok(scan.length >= 6);
  assert.ok(scan.width >= 4);
});

test('水域长度不足时不建议用船', () => {
  const bot = new FakeBot({ x: 0, y: 64, z: 0 });
  // 只有 3 格宽的水沟
  fillWorld(bot, (x) => x >= 1 && x <= 3);
  const scan = scanWaterAhead(bot, 1, 0, 6, 1);
  assert.strictEqual(scan.ok, false);
  assert.ok(scan.reason.includes('长度'));
});

test('水面宽度不足时不建议用船', () => {
  const bot = new FakeBot({ x: 0, y: 64, z: 0 });
  // 一条沿 x 方向的长水道，但 z 方向只有 1 格宽
  fillWorld(bot, (x, z) => x >= 1 && x <= 30 && z === 0);
  const scan = scanWaterAhead(bot, 1, 0, 6, 4);
  assert.strictEqual(scan.ok, false);
  assert.ok(scan.reason.includes('宽度'));
});

test('前方完全没有水时不建议用船', () => {
  const bot = new FakeBot({ x: 0, y: 64, z: 0 });
  fillWorld(bot, () => false);
  const scan = scanWaterAhead(bot, 1, 0, 6, 4);
  assert.strictEqual(scan.ok, false);
  assert.strictEqual(scan.length, 0);
});

test('用船状态机初始为空闲且描述为空', () => {
  const bot = new FakeBot();
  const { AutoBoatController } = require('../src/bot/autoBoat');
  const { defaultConfig } = require('../src/config/expansionConfig');
  const boat = new AutoBoatController(bot, defaultConfig(), null, null);
  assert.strictEqual(boat.isActive(), false);
  assert.strictEqual(boat.describe(), null);
  assert.strictEqual(boat.state, BoatState.IDLE);
});

test('autoBoat 关闭时 tick 不会进入流程', () => {
  const bot = new FakeBot();
  const { AutoBoatController } = require('../src/bot/autoBoat');
  const { defaultConfig } = require('../src/config/expansionConfig');
  const config = defaultConfig();
  config.autoBoat = false;
  const boat = new AutoBoatController(bot, config, null, null);
  boat.tick({ running: true, canStart: true, target: { x: 1, z: 1 } });
  assert.strictEqual(boat.isActive(), false);
});

test('waterMode 非 boat 时 tick 不会进入流程（即使 autoBoat 打开）', () => {
  const bot = new FakeBot();
  const { AutoBoatController } = require('../src/bot/autoBoat');
  const { defaultConfig } = require('../src/config/expansionConfig');
  const config = defaultConfig();
  config.autoBoat = true;
  config.waterMode = 'avoid';
  const boat = new AutoBoatController(bot, config, null, null);
  boat.tick({ running: true, canStart: true, target: { x: 1, z: 1 } });
  assert.strictEqual(boat.isActive(), false);
});

test('背包里没有船时不会启动用船流程', () => {
  const bot = new FakeBot({ x: 0, y: 64, z: 0, slots: [] });
  fillWorld(bot, (x) => x >= 1 && x <= 30);
  const { AutoBoatController } = require('../src/bot/autoBoat');
  const { defaultConfig } = require('../src/config/expansionConfig');
  const config = defaultConfig();
  config.autoBoat = true;
  config.waterMode = 'boat';
  const boat = new AutoBoatController(bot, config, null, null);
  boat.tick({ running: true, canStart: true, target: { x: 2, z: 0 } });
  assert.strictEqual(boat.isActive(), false);
});