// Removed useless files, to speed up build process and make it clearer.
const path = require("path");
const fs = require("fs");
const readline = require("readline");

// cmdid current version
const read_cmdid = "cmdid.csv";
const read_cmdid_output = "cmdid.json";
const read_cmdid_output_gc = "cmdid_gc.json";
const read_cmdid_output_gc_update = "cmdid_gc_update.json";
const read_cmdid_output_gc_nofound = "cmdid_gc_nofound.json";

const write_op = "PacketOpcodes.java";

console.log(process.cwd());

//(TODO: add input file)
// folder gc auto-generated proto
const folder_proto_gc_gen =
  "../Grasscutter-Yuuki/src/generated/main/java/emu/grasscutter/net/proto/";
// file PacketOpcodes currently in use
const read_cmdid_gc =
  "../Grasscutter-Yuuki/src/main/java/emu/grasscutter/net/packet/PacketOpcodes.java";

//const read_cmdid = fs.readFileSync("cmdid.csv");
//const read_packetopcodes = fs.readFileSync("PacketOpcodes.java");

var data = [];
var data_gc = [];

var index_file_gen = 0;
var index_file_cmdid = 0;
var index_cmdid_gc = 0;
var index_cmdid_gc_out = 0;
function check_gen() {
  fs.readdir(folder_proto_gc_gen, function (err, files) {
    //handling error
    if (err) {
      return console.log("Unable to scan directory: " + err);
    }
    files.forEach(function (file) {
      index_file_gen++;
    });
    console.log("file proto gen: " + index_file_gen);
  });
}

// gen json file cmdid
function get_cmdid_json() {
  const inputStreamcmdid = fs.createReadStream(read_cmdid);
  var lineReadercmdid = readline.createInterface({
    input: inputStreamcmdid,
    terminal: false,
  });
  lineReadercmdid.on("line", function (line) {
    var config = line.split(",");
    var subdata = new Object();
    subdata["name"] = config[0];
    subdata["id"] = parseInt(config[1]);
    data.push(subdata);
    index_file_cmdid++;
  });
  lineReadercmdid.on("close", function () {
    console.log("found cmd id " + index_file_cmdid);
    save_json(data, read_cmdid_output);
  });
}

// create cmdid from gc which comes from PacketOpcodes
function get_cmdid_gc() {
  const inputStreamcmdid = fs.createReadStream(read_cmdid_gc);
  var lineReadercmdid = readline.createInterface({
    input: inputStreamcmdid,
    terminal: false,
  });
  lineReadercmdid.on("line", function (line) {
    var config = line.split(" = ");
    var name = config[0];
    var id = parseInt(config[1]);
    if (name.includes("public static final int")) {
      name = name.replace("\tpublic static final int ", "");
      // skip 0 ?
      if (id == 0) {
        return;
      }
      var subdata = new Object();
      subdata["name"] = name;
      subdata["id"] = id;
      data_gc.push(subdata);
      //console.log(name);
      index_cmdid_gc++;
    } else {
      index_cmdid_gc_out++;
    }
  });
  lineReadercmdid.on("close", function () {
    console.log(
      "found cmd id " + index_cmdid_gc + " | no need " + index_cmdid_gc_out
    );
    save_json(data_gc, read_cmdid_output_gc);
  });
}

var found_cmdid_new = 0;
var nofound_cmdid_new = 0;
var rename_name_cmdid = 0;
var noneed_rename_name_cmdid = 0;
var data_gc_cmdid_nofound = [];

var check_dunp_id = [];
function update_cmdid_gc() {
  const cmd_last = fs.readFileSync(read_cmdid_output);
  const cmd_old = fs.readFileSync(read_cmdid_output_gc);
  const json_cmdid_last = JSON.parse(cmd_last);
  const json_cmdid_old = JSON.parse(cmd_old);
  json_cmdid_old.forEach(function (s, index) {
    var id = s.id;
    var name = s.name;

    var found_id = json_cmdid_last.find((j) => j.id == id);
    if (found_id) {
      found_cmdid_new++;
      if (name == found_id.name) {
        noneed_rename_name_cmdid++;
      } else {
        rename_name_cmdid++;
        //console.log("Wow rename -> ID: "+id+" | Name: "+name+" > "+found_id.name);
        // rename json_cmdid_old
        s.name = found_id.name;
      }
    } else {
      console.log("Wow nofound -> ID: " + id + " | Name: " + name);
      data_gc_cmdid_nofound.push(s);
      nofound_cmdid_new++;
    }

    // find dump by id
    var found_id = check_dunp_id.find((j) => j.id == id);
    if (found_id) {
      console.log(
        "Wow dup -> ID: " +
          id +
          " (ADD " +
          found_id.id +
          ") | Name Remove: " +
          name +
          " (ADD " +
          found_id.name +
          ")"
      );
      // remove bad
      json_cmdid_old.splice(index, 1);
    } else {
      check_dunp_id.push(s);
    }
  });

  // I don't know why this happened but make sure to check again
  json_cmdid_old.forEach(function (s, index) {
    var id = s.id;
    var name = s.name;

    // maybe need || j.name == name
    var found_id = json_cmdid_last.find((j) => j.id == id);
    if (found_id) {
      if (name != found_id.name) {
        console.log(
          "Wow why? -> ID: " + id + " | Name: " + name + " > " + found_id.name
        );
        s.name = found_id.name;
      }
    }
  });

  console.log(
    "found " +
      found_cmdid_new +
      " | no found " +
      nofound_cmdid_new +
      " | rename " +
      rename_name_cmdid +
      " | noneed rename " +
      noneed_rename_name_cmdid
  );
  save_json(json_cmdid_old, read_cmdid_output_gc_update);
  save_json(data_gc_cmdid_nofound, read_cmdid_output_gc_nofound);
}

// save json
function save_json(raw, file) {
  var j = JSON.stringify(raw, null, 4);
  save(j, file);
}

function save(raw, file) {
  fs.writeFile(file, raw, "utf8", function (err) {
    if (err) {
      console.log("An error occured while writing to File.");
      return console.log(err);
    }
    console.log("File has been saved.");
  });
}

function cmdid_to_op() {
  let melon =
    "\
    package emu.grasscutter.net.packet;\
    \n\
    \npublic class PacketOpcodes {\
        \n// Empty\
        \npublic static final int NONE = 0;\
        \n\
        \n// Opcodes\
    ";

  const cmdidfix_raw = fs.readFileSync(read_cmdid_output_gc_update);
  const json_cmdidfix_raw = JSON.parse(cmdidfix_raw);
  json_cmdidfix_raw.forEach(function (s) {
    melon += "\npublic static final int " + s.name + " = " + s.id + ";";
  });

  melon += "\n}";
  save(melon, write_op); // use "npx prettier --write PacketOpcodes.java" for better Formatter
}

function isBlank(str) {
  return !!!str || /^\s*$/.test(str);
}

cmdid_to_op();
//update_cmdid_gc();
//get_cmdid_gc();
//get_cmdid_json();
//check_gen();