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

exports.main = async ({ type, ...item }, db) => {
  switch (type) {
    case 'addAddress':
      return await addAddress(item, db);
    case 'updateAddress':
      return await updateAddress(item, db);
    case 'deleteAddress':
      return await deleteAddress(item, db);
    case 'getAddressList':
      return await getAddressList(item, db);
    case 'getDefaultAddress':
      return await getDefaultAddress(item, db);
  }
}

function verify(data) {
  const { name, phone, address, accountId, latitude, longitude } = data || {};

  const region = data && Array.isArray(data.region) ? data.region.filter(i => typeof i === 'string' && i.trim()) : [];
  if (!(region.length > 1 && region.length < 4)) {
    return { success: false, message: '省市区信息不正确' };
  }
  if (typeof address !== 'string' || address.trim() === '') {
    return { success: false, message: '详细地址不能为空' };
  }
  if (typeof latitude !== 'number' || typeof longitude !== 'number') {
    return { success: false, message: '经纬度信息不正确' };
  }
  if (!(latitude > 0 && longitude > 0)) {
    return { success: false, message: '经纬度信息不正确' };
  }
  if (address.trim().length > 100) {
    return { success: false, message: '详细地址最多100个字' };
  }
  if (typeof name !== 'string' || name.trim() === '') {
    return { success: false, message: '收货人不能为空' };
  }
  if (name.trim().length > 20) {
    return { success: false, message: '收货人最多20个字' };
  }
  if (typeof phone !== 'string' || phone.trim() === '') {
    return { success: false, message: '手机号不能为空' };
  }
  if (!validator.isMobile(phone.trim())) {
    return { success: false, message: '手机号格式不正确' };
  }
  if (typeof accountId !== 'string' || accountId.trim() === '') {
    return { success: false, message: '账户ID不能为空' };
  }
  const docData = {
    region,
    address,
    name: Sm4Util.encryptDataForSm3(name.trim()),
    phone: Sm4Util.encryptDataForSm3(phone.trim()),
    latitude,
    longitude,
    accountId: accountId.trim(),
  }
  if (typeof data.isDefault === 'boolean') {
    docData.isDefault = data.isDefault
  }
  return { success: true, message: '验证通过', data: docData };
}

async function addAddress(item, db) {
  try {
    const { success, message, data } = verify(item);
    if (success) {
      const count = await db.collection('address').countDocuments({ accountId: data.accountId, disabled: false });
      if (count >= 3) {
        return { success: false, message: '每人最多可保存3个常用地址' };
      }
      data.createTime = Date.now();
      data.updateTime = Date.now();
      data.disabled = false;
      if (data.isDefault) {
        await db.collection('address').updateMany({ accountId: data.accountId }, { $set: { isDefault: false } });
      }
      const res = await db.collection('address').insertOne(data);
      return { success: true, message: '新增地址成功', id: res.insertedId };
    }
    return { success, message };
  } catch (e) {
    return { success: false, message: e.message };
  }
}

async function updateAddress(item, db) {
  try {
    if (typeof item.id !== 'string' || item.id.trim() === '') {
      return { success: false, message: '地址ID不能为空' };
    }
    const { success, message, data } = verify(item);
    if (success) {
      const address = await db.collection('address').findOne({ _id: new ObjectId(item.id), accountId: data.accountId, disabled: false });
      if (!address) {
        return { success: false, message: '地址不存在或者账户id不匹配' };
      }
      const modified = checkModified(address, data);
      if (modified) {
        data.lockTime = dayjs().add(30, 'day').valueOf();
        const lockTime = await getLockTime(data.accountId, db);
        if (lockTime) {
          return { success: false, message: `地址信息已被锁定, ${lockTime}前无法修改` };
        }
      }
      data.updateTime = Date.now();
      if (data.isDefault) {
        await db.collection('address').updateMany({ accountId: data.accountId, _id: { $ne: new ObjectId(item.id) } }, { $set: { isDefault: false } });
      }
      const res = await db.collection('address').updateOne({ _id: new ObjectId(item.id) }, { $set: data });
      if (res.modifiedCount > 0) {
        await saveAddressHistory(address, data, 'update', db);
        return { success: true, message: '更新地址成功' };
      }
      return { success: false, message: '更新地址失败' };
    }
    return { success, message };
  } catch (e) {
    return { success: false, message: e.message };
  }
}

async function deleteAddress(item, db) {
  try {
    if (typeof item.id !== 'string' || item.id.trim() === '') {
      return { success: false, message: '地址ID不能为空' };
    }
    if (typeof item.accountId !== 'string' || item.accountId.trim() === '') {
      return { success: false, message: '账户ID不能为空' };
    }
    const lockTime = await getLockTime(item.accountId, db);
    if (lockTime) {
      return { success: false, message: `地址信息已被锁定, ${lockTime}前无法删除` };
    }
    const address = await db.collection('address').findOne({ _id: new ObjectId(item.id), accountId: item.accountId.trim(), disabled: false });
    if (!address) {
      return { success: false, message: '地址不存在或者账户id不匹配' };
    }
    const res = await db.collection('address').updateOne({ _id: new ObjectId(item.id), accountId: item.accountId.trim() }, { $set: { disabled: true, lockTime: dayjs().add(30, 'day').valueOf() } });
    if (res.modifiedCount > 0) {
      await saveAddressHistory(address, undefined, 'delete', db);
      return { success: true, message: '删除地址成功' };
    }
    return { success: false, message: '删除地址失败' };
  } catch (e) {
    return { success: false, message: e.message };
  }
}

async function getAddressList(item, db) {
  try {
    const { accountId } = item || {};
    if (typeof accountId !== 'string' || accountId.trim() === '') {
      return { success: false, message: '账户ID不能为空' };
    }
    const res = await db.collection('address').find({ accountId: accountId.trim(), disabled: false }).toArray();
    const list = res.map(item => {
      return {
        id: item._id.toString(),
        name: Sm4Util.decryptDataForSm3(item.name),
        phone: Sm4Util.decryptDataForSm3(item.phone),
        address: item.address,
        isDefault: item.isDefault,
        region: item.region,
        latitude: item.latitude,
        longitude: item.longitude
      }
    })
    return { success: true, message: '查询地址列表成功', data: list };
  } catch (e) {
    return { success: false, message: e.message };
  }
}

async function getDefaultAddress(item, db) {
  try {
    const { accountId } = item || {};
    if (typeof accountId !== 'string' || accountId.trim() === '') {
      return { success: false, message: '账户ID不能为空' };
    }
    const res = await db.collection('address').findOne({ accountId: accountId.trim(), disabled: false, isDefault: true });
    if (res) {
      return {
        success: true, message: '查询默认地址成功', data: {
          id: res._id.toString(),
          name: Sm4Util.decryptDataForSm3(res.name),
          phone: Sm4Util.decryptDataForSm3(res.phone),
          address: res.address,
          region: res.region,
          latitude: res.latitude,
          longitude: res.longitude
        }
      }
    }
    return { success: true, data: null, message: '未查询到默认地址' };
  } catch (e) {
    return { success: false, message: e.message };
  }
}

function checkModified(address, data) {
  try {
    if (address.name !== data.name) {
      return true
    }
    if (address.phone !== data.phone) {
      return true
    }
    if (address.address !== data.address) {
      return true
    }
    if (address.region.join(',') !== data.region.join(',')) {
      return true
    }
    if (address.latitude !== data.latitude) {
      return true
    }
    if (address.longitude !== data.longitude) {
      return true
    }
    return false
  } catch (e) {
    return false
  }
}

async function getLockTime(accountId, db) {
  try {
    const [data] = await db.collection('address').find({ accountId, lockTime: { $gt: Date.now() } }).sort({ lockTime: -1 }).toArray();
    if (data && data.lockTime) {
      return dayjs(data.lockTime).format('YYYY年MM月DD日 HH:mm');
    }
    return ''
  } catch (e) {
    return ''
  }
}

async function saveAddressHistory(previous, current, type, db) {
  try {
    const history = {
      addressId: previous._id,
      accountId: previous.accountId,
      type,
      createTime: Date.now()
    }
    const { name, phone, address, region, latitude, longitude, isDefault } = previous;
    history.previous = {
      name,
      phone,
      address,
      region,
      latitude,
      longitude,
      isDefault
    }
    if (current) {
      history.current = {
        name: current.name,
        phone: current.phone,
        address: current.address,
        region: current.region,
        latitude: current.latitude,
        longitude: current.longitude,
        isDefault: current.isDefault
      }
    }
    await db.collection('address-change-history').insertOne(history);
    return { success: true, message: '保存地址历史成功' };
  } catch (e) {
    return { success: false, message: e.message };
  }
}