import { createHash } from "node:crypto";
import { readFile, writeFile } from "node:fs/promises";
import path from "node:path";
import { fileURLToPath } from "node:url";

const pipelineDirectory = path.dirname(fileURLToPath(import.meta.url));
const projectRoot = path.resolve(pipelineDirectory, "../..");
const packRoot = path.join(projectRoot, "public/assets/characters/runewaker-v1");
const importFile = path.join(packRoot, "import-manifest.json");
const outputFile = path.join(packRoot, "manifest.json");
const imported = JSON.parse(await readFile(importFile, "utf8"));

if (imported.status !== "green" || imported.assets?.length !== 5) {
  throw new Error("RuneWaker player avatar import must contain all five validated native rigs.");
}

const identityByAsset = {
  "rom-human-male": ["rom-human", "male", 1, 0],
  "rom-human-female": ["rom-human", "female", 1, 1],
  "rom-elf-male": ["rom-elf", "male", 2, 0],
  "rom-elf-female": ["rom-elf", "female", 2, 1],
  "rom-dwarf-male": ["rom-dwarf", "male", 3, 0],
};

const counts = { skinColor: 8, face: 8, hairStyle: 8, hairColor: 8, feature: 8 };
const indices = Array.from({ length: 8 }, (_, index) => index);
const triplet = ["", "", ""];
const blankByColor = indices.map(() => triplet);
const skinOptions = indices.map((index) => ({
  dbcColor: index,
  base: "",
  underwear: triplet,
}));
const faceOptions = indices.map((index) => ({ dbcVariation: index, bySkin: blankByColor }));
const hairOptions = indices.map((index) => ({
  dbcVariation: index,
  geoset: 1,
  showScalp: true,
  byColor: blankByColor,
}));
const featureOptions = indices.map((index) => ({
  dbcVariation: index,
  geosets: [],
  byColor: blankByColor,
}));

const entries = Object.fromEntries(imported.assets.map((asset) => {
  const identity = identityByAsset[asset.id];
  if (!identity) throw new Error(`Unexpected RuneWaker player avatar ${asset.id}.`);
  const [raceId, gender, dbcRaceId, dbcSexId] = identity;
  const requiredClips = [
    "Stand - stand_idle01",
    "Walk - walk_forward",
    "Run - run_forward",
    "Attack - unarmed_attack01",
    "Cast - cast01",
    "Wound - hurt",
    "Death - death",
  ];
  for (const clip of requiredClips) {
    if (!asset.animations.includes(clip)) {
      throw new Error(`${asset.id} is missing required native animation ${clip}.`);
    }
  }
  return [`${raceId}:${gender}`, {
    raceId,
    gender,
    dbcRaceId,
    dbcSexId,
    sourceModel: asset.sourceModel,
    model: asset.url,
    bytes: asset.size,
    scale: 1,
    groundOffset: asset.groundOffset,
    rotationY: asset.rotationY,
    materialTokens: { body: "", hair: "" },
    animations: {
      idle: "Stand - stand_idle01",
      walk: "Walk - walk_forward",
      run: "Run - run_forward",
      attack: "Attack - unarmed_attack01",
      cast: "Cast - cast01",
      wound: "Wound - hurt",
      death: "Death - death",
    },
    counts,
    dbcIndices: {
      skinColor: indices,
      face: indices,
      hairStyle: indices,
      hairColor: indices,
      feature: indices,
    },
    skinOptions,
    faceOptions,
    hairOptions,
    featureOptions,
    rendererStrategy: {
      kind: "runewaker-modular",
      nativeBodyRig: true,
      sharedSkeleton: true,
      starterPaperdoll: true,
      cachedDimensions: ["skinColor", "face", "hairStyle", "hairColor", "feature", "gear"],
      sourceParts: ["head", "hair", "torso", "hand", "leg", "foot"],
      skinPalette: ["#f2d1bc", "#deb39a", "#c89373", "#aa7354", "#82533f", "#eed4c7", "#d6a887", "#9d654c"],
      hairPalette: ["#211a17", "#493124", "#73482a", "#9c713f", "#b9a27a", "#7a2630", "#c8c3b4", "#342c43"],
    },
    provenance: {
      glbSha256: asset.checksum,
      sourceModelSha256: asset.sourceModelSha256,
      assemblySha256: asset.paperdollAssemblySha256,
      nativeClipCount: asset.animations.length,
    },
  }];
}));

const sourceMaterial = Object.values(entries)
  .map((entry) => `${entry.provenance.sourceModelSha256}:${entry.provenance.glbSha256}`)
  .join("|");
const manifest = {
  version: 1,
  sourceBuild: `runewaker-v1-${createHash("sha256").update(sourceMaterial).digest("hex").slice(0, 16)}`,
  publicRoot: "/assets/characters/runewaker-v1",
  textureLayout: {
    width: 1,
    height: 1,
    regions: {
      base: [0, 0, 1, 1],
      faceUpper: [0, 0, 1, 1],
      faceLower: [0, 0, 1, 1],
      torsoUpper: [0, 0, 1, 1],
      pelvisUpper: [0, 0, 1, 1],
    },
  },
  entries,
  provenance: {
    generator: "scripts/runewaker-pipeline/finalize-player-avatar-manifest.mjs",
    importManifest: "public/assets/characters/runewaker-v1/import-manifest.json",
    runtimeRuneWakerDependency: false,
    renderer: "native shared-skeleton modular paperdoll",
  },
};

await writeFile(outputFile, JSON.stringify(manifest, null, 2) + "\n", "utf8");
console.log(`Generated ${Object.keys(entries).length} RuneWaker playable avatar rigs.`);