/**
 * resolve-names.js
 * ------------------------------------------------------------
 * get-master-data.js が保存した configs/master/master_users.json /
 * master_depts.json / master_groups.json を読み込み、
 * Permissions等に登場する {Type, Id} 形式の値と、ユーザー/組織/グループ名との
 * 相互変換を行うユーティリティ。
 * ClaudePleasanter直下に置く共通実装。全プロジェクトの薄いラッパーから require される。
 *
 * 使い方（他スクリプトから）:
 *   const { loadMasterData, resolveName, resolveId } = require("./resolve-names");
 *   const master = loadMasterData(baseDir, env); // 両方省略時はresolveProjectRoot()で解決
 *   resolveName(master, { Type: "User", Id: 579 });     // => "福島 成佳" 等
 *   resolveId(master, { Type: "User", Name: "福島 成佳" }); // => [579] （一致するIdの配列）
 * ------------------------------------------------------------
 */

const fs = require("fs");
const path = require("path");

const MASTER_FILES = {
  User: "master_users.json",
  Dept: "master_depts.json",
  Group: "master_groups.json",
};

function readJson(p, required = true) {
  if (!fs.existsSync(p)) {
    if (required) {
      console.error(`[エラー] ファイルが見つかりません: ${p}`);
      console.error("先に node get-master-data.js を実行してください。");
      process.exit(1);
    }
    return null;
  }
  return JSON.parse(fs.readFileSync(p, "utf-8"));
}

// configs/{env}/master/master_*.json を読み込み、Type別に { idField, nameField, list } を返す
function loadMasterData(baseDir, env) {
  if (!baseDir || !env) {
    const resolved = require("./resolve-project").resolveProjectRoot();
    if (!baseDir) baseDir = resolved.baseDir;
    if (!env) env = resolved.env;
  }
  const masterDir = path.join(baseDir, "configs", env, "master");

  const usersJson = readJson(path.join(masterDir, MASTER_FILES.User));
  const deptsJson = readJson(path.join(masterDir, MASTER_FILES.Dept));
  const groupsJson = readJson(path.join(masterDir, MASTER_FILES.Group));

  return {
    User: {
      idField: "UserId",
      nameField: "Name",
      list: usersJson?.Response?.Data || [],
    },
    Dept: {
      idField: "DeptId",
      nameField: "DeptName",
      list: deptsJson?.Response?.Data || [],
    },
    Group: {
      idField: "GroupId",
      nameField: "GroupName",
      list: groupsJson?.Response?.Data || [],
    },
  };
}

// { Type: "User"|"Dept"|"Group", Id } -> 名前文字列（見つからなければ "(不明:Type#Id)"）
function resolveName(master, { Type, Id }) {
  const bucket = master[Type];
  if (!bucket) return `(不明な種別:${Type})`;
  const item = bucket.list.find((x) => String(x[bucket.idField]) === String(Id));
  if (!item) return `(不明:${Type}#${Id})`;
  return item[bucket.nameField];
}

// { Type: "User"|"Dept"|"Group", Name } -> 一致するIdの配列（完全一致、複数該当もありうる）
function resolveId(master, { Type, Name }) {
  const bucket = master[Type];
  if (!bucket) return [];
  return bucket.list
    .filter((x) => x[bucket.nameField] === Name)
    .map((x) => x[bucket.idField]);
}

module.exports = { loadMasterData, resolveName, resolveId };