const common = require("../../common.js");
let db = null;

exports.main = async (context, DB) => {
  db = DB;
  switch (context.type) {
    case "addProjectPackageCate":
      return await addProjectPackageCate(context);
    case "updateProjectPackageCate":
      return await updateProjectPackageCate(context);
    case "deleteProjectPackageCate":
      return await deleteProjectPackageCate(context);
    case "getProjectPackageCateList":
      return await getProjectPackageCateList(context);
    case "sortProjectPackageCate":
      return await sortProjectPackageCate(context);
    case "ifCateExist":
      return await ifCateExist(context);
  }
};

async function addProjectPackageCate(context) {
  let { corpId, label, parentId } = context;
  if (!corpId) return { success: false, message: "机构id不能为空" };
  if (typeof label !== "string" || label.trim() === "")
    return { success: false, message: "分类名称无效" };
  if (label.trim().length > 10)
    return { success: false, message: "分类名称不能超过10个字" };
  try {
    if (parentId) {
      const parent = await db
        .collection("project-package-cate")
        .findOne({ _id: parentId, corpId });
      if (!parent) return { success: false, message: "父级分类不存在" };
      if (![1, 2].includes(parent.level))
        return { success: false, message: "父级分类层级错误" };
      const res = await db.collection("project-package-cate").insertOne({
        _id: common.generateRandomString(24),
        corpId,
        label,
        level: parent.level + 1,
        parentId,
        createTime: Date.now(),
      });
      return { success: true, data: res, message: "添加分类成功" };
    }
    const res = await db.collection("project-package-cate").insertOne({
      _id: common.generateRandomString(24),
      corpId,
      label,
      level: 1,
      createTime: Date.now(),
    });
    return { success: true, data: res, message: "添加分类成功" };
  } catch (e) {
    return { success: false, message: e.message };
  }
}

async function updateProjectPackageCate(context) {
  let { corpId, id: _id, label } = context;
  if (!corpId) return { success: false, message: "机构id不能为空" };
  if (!_id) return { success: false, message: "分类id不能为空" };
  if (typeof label !== "string" || label.trim() === "")
    return { success: false, message: "分类名称无效" };
  if (label.trim().length > 10)
    return { success: false, message: "分类名称不能超过10个字" };
  try {
    const res = await db
      .collection("project-package-cate")
      .updateOne({ _id, corpId }, { $set: { label: label.trim() } });
    return { success: true, data: res, message: "更新分类成功" };
  } catch (e) {
    return { success: false, message: e.message };
  }
}

async function deleteProjectPackageCate(context) {
  let { corpId, id: _id } = context;
  if (!corpId) return { success: false, message: "机构id不能为空" };
  if (!_id) return { success: false, message: "分类id不能为空" };
  try {
    const cate = await db
      .collection("project-package-cate")
      .findOne({ _id, corpId });
    if (!cate) return { success: false, message: "分类不存在" };
    const ids = [_id];
    if (cate.level < 3) {
      const children = await db
        .collection("project-package-cate")
        .find({ corpId, parentId: _id })
        .toArray();
      const childrenIds = children.map((item) => item._id);
      if (cate.level === 1 && childrenIds.length) {
        const grandchildren = await db
          .collection("project-package-cate")
          .find({ corpId, parentId: { $in: childrenIds } })
          .toArray();
        ids.push(...grandchildren.map((item) => item._id));
      }
      ids.push(...childrenIds);
    }
    const res = await db
      .collection("project-package-cate")
      .deleteMany({ corpId, _id: { $in: ids } });
    if (res.deletedCount > 0)
      return {
        success: true,
        deleted: res.deletedCount,
        message: "删除分类成功",
      };
    return { success: false, message: "删除分类失败" };
  } catch (e) {
    return { success: false, message: e.message };
  }
}

async function getProjectPackageCateList(context) {
  let { corpId } = context;
  if (!corpId) return { success: false, message: "机构id不能为空" };
  try {
    const list = await db
      .collection("project-package-cate")
      .find({ corpId, init: { $exists: false } })
      .sort({ createTime: 1 })
      .limit(10000)
      .toArray();
    if (list.length) return { success: true, list, message: "获取分类成功" };
    const initRecord = await db
      .collection("project-package-cate")
      .findOne({ corpId, init: true });
    if (initRecord) return { success: true, list: [], message: "获取分类成功" };
    await db
      .collection("project-package-cate")
      .insertOne({ _id: common.generateRandomString(24), corpId, init: true });
    await db.collection("project-package-cate").insertOne({
      _id: common.generateRandomString(24),
      corpId,
      label: "默认",
      level: 1,
      createTime: Date.now(),
    });
    const newlist = await db
      .collection("project-package-cate")
      .find({ corpId, init: { $exists: false } })
      .sort({ createTime: 1 })
      .limit(10000)
      .toArray();
    return { success: true, list: newlist, message: "获取分类成功" };
  } catch (e) {
    return { success: false, message: e.message };
  }
}
async function sortProjectPackageCate(context) {
  const { corpId, sortData } = context;
  if (!corpId) return { success: false, message: "机构id不能为空" };
  const arr = Array.isArray(sortData)
    ? sortData.filter(
        (i) =>
          i._id && typeof i.sort === "number" && i.sort % 1 === 0 && i.sort >= 0
      )
    : [];
  if (arr.length === 0) return { success: false, message: "参数错误" };

  try {
    const bulkOps = arr.map((item) => ({
      updateOne: {
        filter: { _id: item._id, corpId, parentId: { $exists: false } },
        update: { $set: { sort: item.sort } },
      },
    }));

    const res = await db.collection("project-package-cate").bulkWrite(bulkOps);

    if (res.modifiedCount > 0) {
      return { success: true, message: "操作成功" };
    } else {
      return { success: false, message: "未找到匹配的分类或排序未改变" };
    }
  } catch (e) {
    return { success: false, message: e.message };
  }
}
async function ifCateExist(context) {
  const { corpId, cateId } = context;
  if (!corpId) return { success: false, message: "机构id不能为空" };
  try {
    const cate = await db
      .collection("project-package-cate")
      .findOne({ corpId, _id: cateId });
    return cate ? { success: true } : { success: false, message: "分类不存在" };
  } catch (e) {
    return { success: false, message: e.message };
  }
}