import * as THREE from "three";
import { GLTFLoader } from "three/examples/jsm/loaders/GLTFLoader.js";
import { KTX2Loader } from "three/examples/jsm/loaders/KTX2Loader.js";
import { MeshoptDecoder } from "three/examples/jsm/libs/meshopt_decoder.module.js";
import { OrbitControls } from "three/examples/jsm/controls/OrbitControls.js";
import compressedCampaign from "../../src/game/generated/dungeonCampaignCatalog.compressed";
import { gunzipSync, strFromU8 } from "fflate";
import { WAILING_CAVERNS_DEFINITION } from "../../src/game/dungeons/wailingCaverns";
import { createBiteSizedStockadesDefinition } from "../../src/game/dungeons/biteSizedStockades";
import { withWowDungeonEnvironment } from "../../src/game/wowDungeonEnvironment";
import type { DungeonDefinition } from "../../src/game/dungeonTypes";
import { resolveDungeonAssets } from "../../src/game/dungeonAssets";
import { prepareDungeonMaterial } from "../../src/scene/productionDungeonMaterials";
import { applyDungeonMeshGraphics } from "../../src/scene/graphicsMaterialQuality";
import { setDungeonShadowLightPose } from "../../src/scene/dungeonShadowLightRuntime";
import type { ShadowQuality } from "../../src/game/graphicsSettings";
import { cacheStaticMatrices, instanceRepeatedStaticMeshes } from "../../src/scene/staticSceneInstancing";
import { createStaticVisibilityCells, registerStaticVisibility } from "../../src/scene/staticSceneVisibility";
import { materialTextures } from "../../src/scene/threeResourceDisposal";
import { configureWowTerrainLoader } from "../../src/scene/wowTerrainMaterial";

// Isolated asset QA uses shipping assets and the production material/light helpers.
// It intentionally does not claim gameplay, collision or encounter certification.
const params = new URLSearchParams(location.search);
const id = params.get("dungeon") ?? "bite-sized-stormwind-stockade";
// Only environment data is needed. Avoid importing combat/encounter adapters
// into this isolated renderer; the registry uses this same environment adapter.
const campaign = JSON.parse(strFromU8(gunzipSync(Uint8Array.from(atob(compressedCampaign), (char) => char.charCodeAt(0))))) as { definitions: DungeonDefinition[] };
const definitions = campaign.definitions.filter((entry) => entry.expansion !== "runewaker")
  .map((entry) => withWowDungeonEnvironment(entry.id === "wailing-caverns" ? WAILING_CAVERNS_DEFINITION : entry));
const stockade = definitions.find((entry) => entry.id === "stormwind-stockade")!;
definitions.push(createBiteSizedStockadesDefinition(stockade, "wow-environment-review-2026-10-06"));
function findDefinition(): DungeonDefinition {
  const entry = definitions.find((candidate) => candidate.id === id);
  if (!entry) throw new Error(`Unknown WoW dungeon: ${id}`);
  return entry;
}
const definition = findDefinition();
if (definition.expansion === "runewaker") throw new Error(`Expected WoW dungeon: ${id}`);
const p = definition.presentation;
const renderer = new THREE.WebGLRenderer({ antialias: true, preserveDrawingBuffer: true });
renderer.setSize(innerWidth, innerHeight);
renderer.setPixelRatio(1);
renderer.toneMapping = THREE.ACESFilmicToneMapping;
renderer.shadowMap.enabled = true;
renderer.shadowMap.type = THREE.PCFSoftShadowMap;
document.body.append(renderer.domElement);
const scene = new THREE.Scene();
scene.background = new THREE.Color(p.fog.color);
scene.fog = new THREE.Fog(p.fog.color, p.fog.near, p.fog.far);
scene.add(new THREE.AmbientLight(p.ambientLight.color, p.ambientLight.intensity));
scene.add(new THREE.HemisphereLight(p.hemisphereLight.skyColor, p.hemisphereLight.groundColor, p.hemisphereLight.intensity));
const light = new THREE.DirectionalLight(p.directionalLight.color, p.directionalLight.intensity);
light.shadow.bias = -0.00025;
scene.add(light, light.target);
for (const entry of p.pointLights ?? []) {
  const point = new THREE.PointLight(entry.color, entry.intensity, entry.distance, 2);
  point.position.fromArray(entry.position);
  scene.add(point);
}
const camera = new THREE.PerspectiveCamera(60, innerWidth / innerHeight, 0.1, 2000);
const controls = new OrbitControls(camera, renderer.domElement);
const loader = new GLTFLoader();
const decoder = new KTX2Loader().setTranscoderPath("/basis/").detectSupport(renderer);
loader.setKTX2Loader(decoder).setMeshoptDecoder(MeshoptDecoder);
configureWowTerrainLoader(loader);
const root = new THREE.Group();
root.position.fromArray(definition.transform.position);
root.rotation.fromArray([...definition.transform.rotation, "XYZ"]);
root.scale.setScalar(definition.transform.scale);
scene.add(root);
const assets = resolveDungeonAssets(definition);
if (assets.visual.length !== definition.assets.visual.length) throw new Error(`Missing shipping visual for ${id}`);
const visualOverride = params.get("visualOverride");
const runtimePreparation = params.get("runtimePreparation") === "1";
const preparationReports: { batches: number; instances: number; removedMeshes: number; visibilityCells: number }[] = [];
if (visualOverride && (assets.visual.length !== 1
  || !/^\/artifacts\/dungeon-pipeline\/[a-zA-Z0-9_./-]+\.glb$/.test(visualOverride)
  || visualOverride.includes(".."))) {
  throw new Error("A review override must be a single GLB in artifacts/dungeon-pipeline.");
}
for (const url of assets.visual) {
  const reviewUrl = visualOverride ?? (id === "shadowfang-keep" && params.get("stage") === "before-shadowfang"
    ? "/artifacts/playtest/wow-environment-quality/before-shadowfang/visual.glb"
    : id === "shadowfang-keep" && params.get("stage") === "repacked-shadowfang"
      ? "/artifacts/dungeon-pipeline/shadowfang-keep-visual.reoptimized-repacked.glb"
      : id === "shadowfang-keep" && params.get("stage") === "selective-shadowfang"
        ? "/artifacts/dungeon-pipeline/shadowfang-keep-selective-error-0012.glb" : url);
  const gltf = await loader.loadAsync(reviewUrl);
  const preparedMaterials = new Map<string, THREE.Material>();
  const prepare = (material: THREE.Material) => {
    if (runtimePreparation && preparedMaterials.has(material.uuid)) return preparedMaterials.get(material.uuid)!;
    const next = prepareDungeonMaterial(material, p.materials, definition.environmentMode);
    preparedMaterials.set(material.uuid, next);
    return next;
  };
  gltf.scene.traverse((node) => {
    if (!(node instanceof THREE.Mesh)) return;
    node.material = Array.isArray(node.material)
      ? node.material.map(prepare) : prepare(node.material);
    if (runtimePreparation) {
      node.castShadow = false;
      node.receiveShadow = true;
    }
    if (runtimePreparation && node instanceof THREE.InstancedMesh) {
      node.computeBoundingBox();
      node.computeBoundingSphere();
    }
  });
  if (runtimePreparation) {
    const instancing = instanceRepeatedStaticMeshes(gltf.scene, 3, undefined, definition.id === "scholomance");
    const cells = createStaticVisibilityCells(gltf.scene);
    cacheStaticMatrices(gltf.scene);
    registerStaticVisibility(scene, cells);
    preparationReports.push({ ...instancing, visibilityCells: cells.length });
  }
  root.add(gltf.scene);
}
let quality: ShadowQuality = "standard";
function setQuality(value: ShadowQuality) {
  quality = value;
  const extent = quality === "high" ? 26 : 5;
  light.castShadow = quality !== "off";
  light.shadow.map?.dispose();
  light.shadow.map = null;
  light.shadow.mapSize.set(quality === "high" ? 2048 : 1024, quality === "high" ? 2048 : 1024);
  Object.assign(light.shadow.camera, { left: -extent, right: extent, top: extent, bottom: -extent, near: 0.5, far: 90 });
  light.shadow.camera.updateProjectionMatrix();
  applyDungeonMeshGraphics(root, "environment", quality, quality === "high" ? 16 : 1, renderer.capabilities.getMaxAnisotropy());
  setDungeonShadowLightPose(light, new THREE.Vector3(...definition.entrance.footPosition), new THREE.Vector3(...p.directionalLight.offset));
  updateStatus();
}
const viewpoints = [
  { name: "entrance", position: definition.entrance.footPosition, forward: definition.entrance.forward },
  ...definition.bosses.map((boss) => ({ name: boss.name, position: boss.position, forward: definition.entrance.forward })),
];
let selectedView = 0;
function updateStatus() {
  document.querySelector("#status")!.textContent = `${definition.title} · ${viewpoints[selectedView].name} · ${quality} shadows / ${quality === "high" ? "16×" : "1×"} filtering`;
}
function view(index: number, yaw = 0) {
  selectedView = Math.max(0, Math.min(index, viewpoints.length - 1));
  const entry = viewpoints[selectedView];
  const eye = new THREE.Vector3(...entry.position).add(new THREE.Vector3(0, 2.2, 0));
  const forward = new THREE.Vector3(...entry.forward).normalize().applyAxisAngle(new THREE.Vector3(0, 1, 0), yaw);
  camera.position.copy(eye);
  controls.target.copy(eye).add(forward.multiplyScalar(8)).add(new THREE.Vector3(0, -1.2, 0));
  controls.update();
  updateStatus();
}
function diagnostics() {
  let meshes = 0, casters = 0;
  const textures = new Map<string, { name: string; width: number; height: number; anisotropy: number }>();
  root.traverse((node) => {
    if (!(node instanceof THREE.Mesh)) return;
    meshes++;
    if (node.castShadow) casters++;
    for (const material of Array.isArray(node.material) ? node.material : [node.material]) {
      for (const texture of materialTextures(material)) {
        textures.set(texture.uuid, { name: texture.name, width: texture.image?.width,
          height: texture.image?.height, anisotropy: texture.anisotropy });
      }
    }
  });
  return { meshes, casters, textures: [...textures.values()], runtimePreparation, preparationReports, drawCalls: renderer.info.render.calls,
    renderedTriangles: renderer.info.render.triangles, geometries: renderer.info.memory.geometries,
    lightTarget: light.target.position.toArray(), camera: camera.position.toArray(), maxAnisotropy: renderer.capabilities.getMaxAnisotropy() };
}
function setCamera(eye: [number, number, number], target: [number, number, number]) {
  camera.position.fromArray(eye);
  controls.target.fromArray(target);
  controls.update();
}
function groundSamples() {
  root.updateMatrixWorld(true);
  const ray = new THREE.Raycaster();
  return viewpoints.map((entry) => {
    const origin = new THREE.Vector3(...entry.position).add(new THREE.Vector3(0, 20, 0));
    ray.set(origin, new THREE.Vector3(0, -1, 0));
    ray.far = 80;
    const seen = new Set<string>();
    const hits = ray.intersectObject(root, true).flatMap((hit) => {
      const mesh = hit.object as THREE.Mesh;
      const material = (Array.isArray(mesh.material)
        ? mesh.material[hit.face?.materialIndex ?? 0] : mesh.material) as THREE.MeshStandardMaterial;
      const key = `${mesh.uuid}:${hit.instanceId}:${Math.round(hit.point.y * 1000)}`;
      if (seen.has(key)) return [];
      seen.add(key);
      return [{ mesh: mesh.name, material: material.name, textured: materialTextures(material).length > 0,
        height: hit.point.y, heightAboveFoot: hit.point.y - entry.position[1], point: hit.point.toArray() }];
    }).slice(0, 8);
    return { name: entry.name, position: entry.position, hits };
  });
}
view(0);
setQuality("standard");
let frames = 0;
let frameStart = performance.now();
function resetFrameSample() {
  frames = 0;
  frameStart = performance.now();
}
function frameSample() {
  const elapsedMs = performance.now() - frameStart;
  return { frames, elapsedMs, fps: elapsedMs > 0 ? frames * 1000 / elapsedMs : null };
}
renderer.setAnimationLoop(() => {
  controls.update();
  if (quality === "high") setDungeonShadowLightPose(light, camera.position, new THREE.Vector3(...p.directionalLight.offset));
  renderer.render(scene, camera);
  frames++;
});
Object.assign(window, { wowEnvironmentReview: { ready: true, id, viewpoints, view, setCamera, setQuality, diagnostics, groundSamples, resetFrameSample, frameSample, presentation: p,
  catalog: definitions.filter((entry) => !entry.id.includes("bite-sized")).map((entry) => ({ id: entry.id, title: entry.title })) } });