"use strict";

import mongoose from "mongoose";
import { pinyin } from "pinyin-pro";

/**
 * HealthProfile Schema
 * 健康档案 - 记录患者的基本健康信息，内容保持简单
 */
const HealthProfileSchema = mongoose.Schema(
  {
    // 关联用户ID（可为空）
    userId: {
      type: mongoose.Schema.Types.ObjectId,
      ref: "user",
      index: { unique: false, sparse: true },
      comment: "所属用户ID",
    },

    // 患者信息
    profile: {
      name: { type: String, default: "", comment: "患者姓名" },
      pinyin: { type: String, default: "", index: true, comment: "患者姓名全拼（小写无分隔，用于搜索）" },
      pinyinFL: { type: String, default: "", index: true, comment: "患者姓名拼音首字母（用于搜索）" },
      mobile: { type: String, default: "", index: true, comment: "患者电话" },
      sex: { type: String, enum: ["male", "female", ""], default: "", comment: "性别" },
      birth: { type: String, default: "", comment: "出生年月（YYYY-MM-DD）" },
      idnumber: { type: String, default: "", comment: "证件号（身份证/护照等）" },
    },

    // 所在地（国外用户填国家；国内用户填省市区 + 详细地址）
    location: {
      country: { type: String, default: "中国", comment: "国家" },
      province: { type: String, default: "", comment: "省" },
      city: { type: String, default: "", comment: "市" },
      district: { type: String, default: "", comment: "区/县" },
      address: { type: String, default: "", comment: "详细地址" },
    },

    // 健康信息
    health: {
      height: { type: Number, default: 0, comment: "身高（cm）" },
      weight: { type: Number, default: 0, comment: "体重（kg）" },
      bloodType: { type: String, default: "", comment: "血型" },
      remark: { type: String, default: "", comment: "备注" },
    },

    // 元数据
    meta: {
      createtime: { type: Date, default: Date.now, comment: "创建时间" },
      updatetime: { type: Date, default: Date.now, comment: "更新时间" },
    },
  },
  {
    minimize: false,
    strict: false,
    collection: "health_profile",
    timestamps: false,
  }
);

// ==================== 拼音生成 ====================

/**
 * 患者姓名 → 全拼（小写、无分隔，如 "张三" → "zhangsan"）
 */
const genPinyin = (name) =>
  pinyin(String(name), { toneType: "none", nonZh: "consecutive" }).toLowerCase().replace(/[^a-z0-9]/g, "");

/**
 * 患者姓名 → 拼音首字母（如 "张三" → "zs"）
 */
const genPinyinFL = (name) =>
  pinyin(String(name), { pattern: "first", toneType: "none", nonZh: "consecutive" }).toLowerCase().replace(/[^a-z0-9]/g, "");

// 保存时自动生成/同步姓名拼音字段
HealthProfileSchema.pre("save", function (next) {
  const name = this.profile?.name;
  if (!name) return next();
  if (this.isModified("profile.name") || !this.profile.pinyin || !this.profile.pinyinFL) {
    this.profile.pinyin = genPinyin(name);
    this.profile.pinyinFL = genPinyinFL(name);
  }
  next();
});

// ==================== 静态方法 ====================

/**
 * 更新包含姓名时同步拼音字段（update 为带 dotted path 的扁平对象）
 */
const syncPinyinOnUpdate = (update) => {
  const name = update["profile.name"] ?? update.profile?.name;
  if (name) {
    update["profile.pinyin"] = genPinyin(name);
    update["profile.pinyinFL"] = genPinyinFL(name);
  }
};

/**
 * 根据用户ID查找健康档案
 */
HealthProfileSchema.statics.findByUserId = async function (userId) {
  return await this.findOne({ userId }).exec();
};

/**
 * 查询健康档案列表（支持分页与筛选）
 *
 * @param {Object} options - 查询选项
   * @param {number} [options.page=1] - 页码
   * @param {number} [options.pageSize=20] - 每页数量
   * @param {ObjectId} [options.userId] - 所属用户ID筛选（可选）
   * @param {string} [options.name] - 患者姓名模糊筛选（可选）
   * @param {string} [options.mobile] - 患者电话筛选（可选）
   * @param {string} [options.sortBy="createtime"] - 排序字段：createtime | updatetime（可选）
   * @returns {Promise<Object>} 返回 `{ list, total, page, pageSize }`
   */
HealthProfileSchema.statics.findProfiles = async function (options = {}) {
  const { page = 1, pageSize = 20, userId, name, mobile, sortBy = "createtime" } = options;
  const filter = {};

  if (userId) {
    filter.userId = userId;
  }
  if (name) {
    // 转义正则特殊字符，避免查询报错或 ReDoS；姓名支持中文、全拼、拼音首字母匹配
    const escaped = name.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
    const re = { $regex: escaped, $options: "i" };
    filter.$or = [{ "profile.name": re }, { "profile.pinyin": re }, { "profile.pinyinFL": re }];
  }
  if (mobile) {
    filter["profile.mobile"] = mobile;
  }

  const sortField = sortBy === "updatetime" ? "meta.updatetime" : "meta.createtime";
  const skip = (page - 1) * pageSize;
  const [list, total] = await Promise.all([
    this.find(filter)
      .sort({ [sortField]: -1 })
      .skip(skip)
      .limit(pageSize)
      .exec(),
    this.countDocuments(filter).exec(),
  ]);

  return { list, total, page: parseInt(page), pageSize: parseInt(pageSize) };
};

/**
 * 根据ID查找健康档案
 */
HealthProfileSchema.statics.findProfileById = async function (id) {
  return await this.findById(id).exec();
};

/**
 * 创建健康档案
 */
HealthProfileSchema.statics.createProfile = async function (data) {
  data.meta = { createtime: Date.now(), updatetime: Date.now() };
  const doc = new this(data);
  return await doc.save();
};

/**
 * 根据ID更新健康档案（更新姓名时同步拼音字段）
 */
HealthProfileSchema.statics.updateProfileById = async function (id, update) {
  syncPinyinOnUpdate(update);
  update["meta.updatetime"] = Date.now();
  return await this.findByIdAndUpdate(id, { $set: update }, { new: true }).exec();
};

/**
 * 根据用户ID更新健康档案（更新姓名时同步拼音字段）
 */
HealthProfileSchema.statics.updateProfile = async function (userId, update) {
  syncPinyinOnUpdate(update);
  update["meta.updatetime"] = Date.now();
  return await this.findOneAndUpdate({ userId }, { $set: update }, { new: true }).exec();
};

/**
 * 根据ID删除健康档案
 */
HealthProfileSchema.statics.deleteProfileById = async function (id) {
  return await this.findByIdAndDelete(id).exec();
};

// ==================== 索引定义 ====================

HealthProfileSchema.index({ userId: 1 }, { sparse: true });
HealthProfileSchema.index({ "profile.mobile": 1 });

export { HealthProfileSchema, genPinyin, genPinyinFL };