// https://docs.google.com/spreadsheets/d/1-3E_t-KsFIw2rpM0hZIKOdNdGm5-GnQjvJb3cysOawE/edit#gid=1532331536

const fs = require("fs");
const _ = require("underscore");
const { allTypes, shuffledModels } = require("./models");
const {
  mode,
  sameType,
  singleModel,
  randomModels,
  excludedModels,
  blacklist,
} = require("./config");

// Check if a model is excluded from modification
function isModelExcluded(fb, sb) {
  for (let i = 0; i < excludedModels.length; i++) {
    const model = excludedModels[i];

    if (
      (model[0] === fb && model[1] === -1) ||
      (model[0] === -1 && model[1] === sb)
    ) {
      return true;
    } else if (model[0] === fb && model[1] === sb) {
      return true;
    }
  }
  return false;
}

// Check if a model is blacklisted
function isModelBlacklisted(fb, sb) {
  for (let i = 0; i < blacklistedModels.length; i++) {
    const model = blacklistedModels[i];

    if (
      (model[0] === fb && model[1] === -1) ||
      (model[0] === -1 && model[1] === sb)
    ) {
      return blacklist.isWhitelist;
    } else if (model[0] === fb && model[1] === sb) {
      return blacklist.isWhitelist;
    }
  }
  return !blacklist.isWhitelist;
}

function replaceModels() {
  const data = fs.readFileSync("character_character_data.bin.orig");

  // Magic
  if (mode === 0) {
    for (let i = 0x16194; i < 0x18ea8; i += 4) {
      if (isModelExcluded(data[i], data[i + 1])) continue;

      data[i] = singleModel[0];
      data[i + 1] = singleModel[1];
    }
  } else if (mode === 1) {
    for (let i = 0x16194; i < 0x18ea8; i += 4) {
      if (isModelExcluded(data[i], data[i + 1])) continue;

      const model = randomModels[_.random(randomModels.length - 1)];

      data[i] = model[0];
      data[i + 1] = model[1];
    }
  } else if (mode === 2) {
    for (let i = 0x16194; i < 0x18ea8; i += 4) {
      const id = data[i];
      const type = data[i + 1];

      if (isModelExcluded(id, type)) continue;

      const modelType = sameType
        ? type
        : allTypes[_.random(allTypes.length - 1)];
      const models = shuffledModels[modelType];

      let modelId = models[_.random(models.length - 1)];

      while (isModelBlacklisted(modelId, type)) {
        modelId = models[_.random(models.length - 1)];
      }

      data[i] = modelId;
      data[i + 1] = type;
    }
  }

  // -----

  fs.writeFileSync("character_character_data.bin", data);
}