import test from 'node:test';
import assert from 'node:assert/strict';
import { generate, rotate, trace } from '../labs/car-loop/model.js';
import { drainOrientation, rotationPlan, batchSeeds } from '../labs/car-loop/batch.js';

for (const kind of ['hex', 'square']) test(`${kind}: batch levels require meaningful rotation choices`, () => {
  for (const [index,seed] of batchSeeds[kind].entries()) {
    const board = generate(kind,seed,16), plan = rotationPlan(board);
    const first = drainOrientation(board);
    assert.ok(first.departed.length >= 2);
    assert.ok(first.remaining.length > 0);
    assert.ok(first.remaining.every(c=>trace(board,c,first.remaining).status !== 'exit'));
    assert.ok(plan.turns.length >= 2 && plan.turns.length <= 4);
    const left = 1 + rotationPlan(rotate(board,-1),first.remaining).turns.length;
    const right = 1 + rotationPlan(rotate(board,1),first.remaining).turns.length;
    assert.notEqual(left,right,`level ${index}: first direction must affect turn cost`);
    if (index === 1) assert.ok(plan.turns.includes(-1) && plan.turns.includes(1),'second challenge rewards reversing direction');
    let current=board, remaining=first.remaining;
    for (const turn of plan.turns) {current=rotate(current,turn);remaining=drainOrientation(current,remaining).remaining;}
    assert.equal(remaining.length,0);
    assert.equal(plan.waves.reduce((sum,n)=>sum+n,0),16);
  }
});