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

const fs = require("fs");
const _ = require("underscore");
const { _models, allTypes, shuffledModels } = require("./models");

if (!fs.existsSync("config.js")) {
  fs.writeFileSync("config.js", fs.readFileSync("config.default.js"));
}

if (!fs.existsSync("output")) {
  fs.mkdirSync("output");
}

const {
  mode,
  sameType,
  singleModel,
  randomModels,
  exclusions,
  blacklist,
} = require("./config");

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

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

// Check if a model is blacklisted
function isModelBlacklisted(fb, sb) {
  for (let i = 0; i < blacklist.models.length; i++) {
    const model = blacklist.models[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(doReplace = true) {
  const data = fs.readFileSync("original/character_character_data.bin.orig");

  let replaced = 0;
  let excluded = 0;

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

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

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

        data[i] = model[0];
        data[i + 1] = model[1];
        replaced++;
      }
    } 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)) {
          excluded++;
          continue;
        }

        if (sameType) {
          const models = shuffledModels[type];

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

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

          data[i] = modelId;
          data[i + 1] = type;
        } else {
          let [modelId, modelType] = _models[_.random(_models.length - 1)];

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

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

        replaced++;
      }
    }
    // -----
  }

  console.log(`Replaced ${replaced} models - Excluded ${excluded}`);

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

// TODO: Create a reverse-lookup map of some sort to fit the proper model height with other models?
// Only does scaling, so not that needed apparently...
function replaceHeights(doReplace = true) {
  const data = fs.readFileSync("original/character_model_model_data.bin.orig");

  if (doReplace) {
    // Magic
    for (let i = 0x23220; i < 0x24910; i += 2) {
      data[i] = 0xb9;
      data[i + 1] = 0x00;
    }
    // -----
  }

  fs.writeFileSync("output/character_model_model_data.bin", data);
}

replaceModels();
replaceHeights(false);