import test from 'node:test';
import assert from 'node:assert/strict';
import { ART_DIRECTIONS, directionTheme, artDirection, appearanceTile } from '../src/art-directions.js';
import { contrast } from '../src/design-tokens.js';
import { drawScene, drawTile, drawExit } from '../src/renderer.js';
import { createStudyLevel } from '../src/study-levels.js';
import { available, trace } from '../src/core.js';
import { layout } from '../src/geometry.js';
test('paper study preserves the variants reference: pale thin rails and outlined hexagons with line arrows',()=>{
  const theme=directionTheme(artDirection('paper'),'lagoon'),commands=[];
  const p={polygon:(points,color)=>commands.push({kind:'polygon',points,color}),line:(points,color,width)=>commands.push({kind:'line',points,color,width}),circle:()=>{}};
  assert.equal(theme.background,'#EAF0F3');assert.equal(theme.materials.board,'#FAFBF7');assert.equal(theme.materials.track,'#B2C4CE');
  assert.deepEqual(theme.pigments.slice(0,2).map(p=>p.color),['#D66C4D','#477FC0']);
  drawTile(p,50,50,40,appearanceTile({color:0,dir:0},theme));
  assert.equal(commands[0].points.length,6);assert.equal(commands[0].color,'#D66C4D');
  assert.ok(Math.abs(commands[0].points[0].x-50-40*.88)<1e-9);
  assert.equal(commands[1].color,'#FFFFFFCC');assert.ok(Math.abs(commands[1].width-40*.035)<1e-9);
  assert.deepEqual(commands.slice(2).map(c=>[c.kind,c.points.length,c.color]),[['line',2,'#FFFFFF'],['line',3,'#FFFFFF']]);
  assert.ok(commands[2].points[1].y<commands[2].points[0].y,'direction zero still points up');
  commands.length=0;
  const level=createStudyLevel(3);drawScene(p,level,[],{size:40,ox:260,oy:260},{theme});
  const rails=commands.filter(c=>c.kind==='line'&&c.color===theme.materials.track);
  assert.equal(rails.length,level.cells.length*3);
  assert.ok(rails.every(c=>Math.abs(c.width-40*.055)<1e-9));
  assert.ok(!commands.some(c=>c.kind==='line'&&c.color===theme.materials.trackHalo),'no thick rail halo');
});
test('each of five art directions has five readable themes and independent token colors',()=>{
  assert.equal(ART_DIRECTIONS.length,5);assert.equal(new Set(ART_DIRECTIONS.map(d=>d.id)).size,5);
  for(const d of ART_DIRECTIONS){
    assert.deepEqual(d.themes.map(t=>t.label),['轻松','进阶','烧脑','挑战','每周挑战']);
    for(const t of d.themes){assert.ok(contrast(t.background,t.ink)>=4.5);assert.equal(directionTheme(d,t.id).artStyle,d.style);}
    for(const p of d.pigments)assert.ok(contrast(p.color,p.arrow)>=3);
  }
  assert.equal(artDirection('invalid').id,'calm');
});
test('art styles change actual geometry without changing level state, including moving tokens',()=>{
  const level=createStudyLevel(3),copy=JSON.stringify(level),view=layout(level.cells,520,600),tile=available(level,level.tiles)[0],route=trace(level,tile,level.tiles);
  const signatures=[];
  for(const d of ART_DIRECTIONS){
    const commands=[],p={polygon:(points,color)=>{assert.ok(color);assert.ok(points.every(p=>Number.isFinite(p.x)&&Number.isFinite(p.y)));commands.push(['polygon',points.length,color]);},circle:(x,y,r,color)=>{assert.ok(Number.isFinite(r)&&r>=0);commands.push(['circle',r,color]);},line:(points,color,width)=>{assert.ok(width>0);commands.push(['line',points.length,color]);}};
    const theme=directionTheme(d,'lagoon'),t=appearanceTile({color:0,dir:1},theme);
    drawTile(p,50,50,40,t);signatures.push(JSON.stringify(commands));
    drawScene(p,level,level.tiles,view,{theme});drawExit(p,route,view,.4,t);drawExit(p,route,view,.99,t);
  }
  assert.equal(new Set(signatures).size,5);assert.equal(JSON.stringify(level),copy);
});
test('vivid worlds retain strong chroma and each new theme has its own seven-color mix',()=>{
  const vivid=artDirection('vivid');
  assert.equal(vivid.themes[0].background,'#B8F34A');
  for(const t of vivid.themes){
    const rgb=t.background.slice(1).match(/../g).map(v=>parseInt(v,16)/255),hi=Math.max(...rgb),lo=Math.min(...rgb),l=(hi+lo)/2,s=(hi-lo)/(1-Math.abs(2*l-1));
    assert.ok(s>=.65&&l<=.65,`${t.name} should keep the saturated poster treatment`);
  }
  for(const d of ART_DIRECTIONS.slice(1)){
    assert.equal(new Set(d.themes.map(t=>directionTheme(d,t.id).palette.slice().sort((a,b)=>a-b).join(','))).size,5);
    assert.equal(new Set(d.themes.map(t=>t.materials.board)).size,5);
    // The paper study deliberately retains the reference's low-contrast rails.
    if(d.style!=='paper')for(const t of d.themes)assert.ok(contrast(t.materials.track,t.materials.board)>=3);
  }
});