const { ObjectId } = require('mongodb');
const validator = require('../../utils/validator');
const Sm4Util = require('../../utils/sm4-util');

const COLLECTION_NAME = 'hlw-patient';

exports.main = async ({ type, ...item }, db) => {
  switch (type) {
    case 'addHlwPatient':
      return addHlwPatient(item, db);
    case 'autoAddHlwPatient':
      return autoAddHlwPatient(item, db);
    case 'getHlwPatientList':
      return getHlwPatientList(item, db);
    case 'getHlwPatient':
      return getHlwPatient(item, db);
    case 'updateHlwPatient':
      return updateHlwPatient(item, db);
    case 'deleteHlwPatient':
      return deleteHlwPatient(item, db);
    default:
      return { success: false, message: '未找到就诊人接口' };
  }
};

function validateAccountId(accountId) {
  if (typeof accountId !== 'string' || accountId.trim() === '') {
    return { success: false, message: 'accountId不能为空' };
  }
  return { success: true, accountId: accountId.trim() };
}

function validatePatient(item) {
  const accountResult = validateAccountId(item && item.accountId);
  if (!accountResult.success) return accountResult;

  const name = typeof item.name === 'string' ? item.name.trim() : '';
  const certNo = typeof item.certNo === 'string' ? item.certNo.trim() : '';
  const mobile = typeof item.mobile === 'string' ? item.mobile.trim() : '';

  if (!name) return { success: false, message: '姓名不能为空' };
  if (!certNo) return { success: false, message: '证件号不能为空' };
  if (!mobile) return { success: false, message: '手机号不能为空' };
  if (!validator.isMobile(mobile)) {
    return { success: false, message: '手机号格式不正确' };
  }

  let address = '';
  if (item.address !== undefined && item.address !== null) {
    if (typeof item.address !== 'string') {
      return { success: false, message: '地址格式不正确' };
    }
    address = item.address.trim();
  }

  return {
    success: true,
    data: {
      accountId: accountResult.accountId,
      anotherIdNo: Sm4Util.encryptDataForSm3(certNo),
      anotherName: Sm4Util.encryptDataForSm3(name),
      anotherMobile: Sm4Util.encryptDataForSm3(mobile),
      address,
    },
  };
}

async function addHlwPatient(item, db) {
  try {
    const validation = validatePatient(item);
    if (!validation.success) return validation;

    const exists = await db.collection(COLLECTION_NAME).countDocuments({
      accountId: validation.data.accountId,
      anotherIdNo: validation.data.anotherIdNo,
      disabled: false,
    });
    if (exists > 0) {
      return { success: false, message: '当前账户下已存在相同证件号的就诊人' };
    }

    const result = await db.collection(COLLECTION_NAME).insertOne({
      ...validation.data,
      createTime: new Date(),
      disabled: false,
    });

    return {
      success: true,
      message: '新增就诊人成功',
      id: result.insertedId.toString(),
    };
  } catch (error) {
    return { success: false, message: error.message || '新增就诊人失败' };
  }
}

async function autoAddHlwPatient(item, db) {
  try {
    const validation = validatePatient(item);
    if (!validation.success) return validation;

    const exists = await db.collection(COLLECTION_NAME).countDocuments({
      accountId: validation.data.accountId,
      anotherIdNo: validation.data.anotherIdNo,
      disabled: false,
    });

    if (exists > 0) {
      return { success: true, data: true, message: '就诊人已存在' };
    }

    const result = await addHlwPatient(item, db);
    if (!result.success) return result;
    return { success: true, data: true, message: '自动新增就诊人成功' };
  } catch (error) {
    return { success: false, message: error.message || '自动新增就诊人失败' };
  }
}

async function getHlwPatientList(item, db) {
  try {
    const validation = validateAccountId(item && item.accountId);
    if (!validation.success) return validation;

    const patients = await db.collection(COLLECTION_NAME)
      .find({ accountId: validation.accountId, disabled: false })
      .toArray();

    const data = patients.map(toPatientData);

    return { success: true, message: '查询就诊人列表成功', data };
  } catch (error) {
    return { success: false, message: error.message || '查询就诊人列表失败' };
  }
}

async function getHlwPatient(item, db) {
  try {
    const validation = validateAccountId(item && item.accountId);
    if (!validation.success) return validation;
    if (!item || typeof item.id !== 'string' || !ObjectId.isValid(item.id.trim())) {
      return { success: false, message: '就诊人ID格式不正确' };
    }

    const patient = await db.collection(COLLECTION_NAME).findOne({
      _id: new ObjectId(item.id.trim()),
      accountId: validation.accountId,
      disabled: false,
    });
    if (!patient) {
      return { success: false, message: '就诊人不存在或accountId不匹配' };
    }

    return { success: true, message: '查询就诊人成功', data: toPatientData(patient) };
  } catch (error) {
    return { success: false, message: error.message || '查询就诊人失败' };
  }
}

function toPatientData(patient) {
  return {
    id: patient._id.toString(),
    accountId: patient.accountId,
    name: Sm4Util.decryptDataForSm3(patient.anotherName),
    certNo: Sm4Util.decryptDataForSm3(patient.anotherIdNo),
    mobile: Sm4Util.decryptDataForSm3(patient.anotherMobile),
    address: patient.address || '',
    createTime: patient.createTime,
  };
}

async function updateHlwPatient(item, db) {
  try {
    const validation = validatePatient(item);
    if (!validation.success) return validation;

    if (typeof item.id !== 'string' || !ObjectId.isValid(item.id.trim())) {
      return { success: false, message: '就诊人ID格式不正确' };
    }

    const result = await db.collection(COLLECTION_NAME).updateOne(
      {
        _id: new ObjectId(item.id.trim()),
        accountId: validation.data.accountId,
        disabled: false,
      },
      { $set: validation.data },
    );

    if (result.matchedCount === 0) {
      return { success: false, message: '就诊人不存在或accountId不匹配' };
    }
    return { success: true, message: '更新就诊人成功' };
  } catch (error) {
    return { success: false, message: error.message || '更新就诊人失败' };
  }
}

async function deleteHlwPatient(item, db) {
  try {
    const validation = validateAccountId(item && item.accountId);
    if (!validation.success) return validation;
    if (!item || typeof item.id !== 'string' || !ObjectId.isValid(item.id.trim())) {
      return { success: false, message: '就诊人ID格式不正确' };
    }

    const result = await db.collection(COLLECTION_NAME).updateOne(
      {
        _id: new ObjectId(item.id.trim()),
        accountId: validation.accountId,
        disabled: false,
      },
      { $set: { disabled: true } },
    );

    if (result.matchedCount === 0) {
      return { success: false, message: '就诊人不存在或accountId不匹配' };
    }
    return { success: true, message: '删除就诊人成功' };
  } catch (error) {
    return { success: false, message: error.message || '删除就诊人失败' };
  }
}