package com.lf.server.service.all;

import com.baomidou.mybatisplus.annotation.TableName;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.lf.server.entity.ctrl.IdNameEntity;
import com.lf.server.entity.ctrl.TabEntity;
import com.lf.server.entity.data.DictEntity;
import com.lf.server.entity.data.DomainEntity;
import com.lf.server.helper.AesHelper;
import com.lf.server.helper.ClassHelper;
import com.lf.server.helper.StringHelper;
import com.lf.server.mapper.all.BaseQueryMapper;
import com.lf.server.mapper.all.BasicMapper;
import com.lf.server.mapper.all.GeomBaseMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * 父查询服务类
 * @author WWW
 */
@Service
public class BaseQueryService implements BaseQueryMapper {
    @Autowired
    BaseQueryMapper baseQueryMapper;

    /**
     * 表名Map
     */
    private static Map<String, String> tabMap = new HashMap<String, String>(3);

    /**
     * 获取父Mapper
     *
     * @param name Mapper名
     * @return BaseMapper
     */
    public BasicMapper getBasicMapper(String name) {
        if (StringHelper.isEmpty(name)) {
            return null;
        }

        Object obj = ClassHelper.getBean(name.trim() + "Mapper");
        if (!(obj instanceof BasicMapper)) {
            return null;
        }

        return (BasicMapper) obj;
    }

    /**
     * 获取空间父Mapper
     *
     * @param name Mapper名
     * @return GeomBaseMapper
     */
    public GeomBaseMapper getGeoBaseMapper(String name) {
        if (StringHelper.isEmpty(name)) {
            return null;
        }

        Object obj = ClassHelper.getBean(name.trim() + "Mapper");
        if (!(obj instanceof GeomBaseMapper)) {
            return null;
        }

        return (GeomBaseMapper) obj;
    }

    /**
     * 添加过滤条件
     *
     * @param wrapper QueryWrapper
     * @param filter  原始过滤条件字符串
     */
    public void addFilterWrapper(QueryWrapper wrapper, String filter) {
        if (StringHelper.isEmpty(filter)) {
            return;
        }

        String[] strs = filter.trim().split(" (?i)and ");
        for (String str : strs) {
            int start = str.indexOf(" ");
            if (start == -1) {
                continue;
            }
            int end = str.indexOf(" ", start + 1);
            if (end == -1) {
                continue;
            }

            String field = str.substring(0, start).trim();
            String express = str.substring(start + 1, end).trim().toLowerCase();
            String value = str.substring(end + 1).trim();

            addWrapper(wrapper, field, express, getObjectVal(value));
        }
    }

    /**
     * 获取值对象
     *
     * @param value 值
     * @return 对象
     */
    private Object getObjectVal(String value) {
        if (StringHelper.isInteger(value)) {
            return Long.parseLong(value);
        }

        if (StringHelper.isNumeric(value)) {
            return Double.parseDouble(value);
        }

        return value.replace("'", "");
    }

    /**
     * 添加包装器
     *
     * @param wrapper QueryWrapper
     * @param field   字段
     * @param express 表达式
     * @param value   值
     */
    private void addWrapper(QueryWrapper wrapper, String field, String express, Object value) {
        switch (express) {
            case "like":
                wrapper.like(field, value);
                break;
            case ">":
                wrapper.gt(field, value);
                break;
            case ">=":
                wrapper.ge(field, value);
                break;
            case "<>":
                wrapper.ne(field, value);
                break;
            case "=":
                wrapper.eq(field, value);
                break;
            case "<":
                wrapper.lt(field, value);
                break;
            case "<=":
                wrapper.le(field, value);
                break;
            default:
                break;
        }
    }

    /**
     * 添加空间过滤条件
     *
     * @param basicMapper 父Mapper
     * @param wrapper     QueryWrapper
     * @param wkt         WKT（著名文本）
     * @param srid        空间引用标识符
     * @throws Exception 异常
     */
    public void addGeomWrapper(BasicMapper basicMapper, QueryWrapper wrapper, String wkt, Integer srid) throws Exception {
        if (basicMapper instanceof GeomBaseMapper && !StringHelper.isEmpty(wkt) && srid != null) {
            wkt = AesHelper.decrypt(wkt);
            wrapper.apply(String.format("ST_Intersects(geom, ST_PolygonFromText('%s', %d))", wkt, srid));
        }
    }

    /**
     * 根据Mapper获取表名
     *
     * @param basicMapper Mapper
     * @return 表名
     */
    public String getTabName(BasicMapper basicMapper) {
        String className = ClassHelper.getClassName(basicMapper);
        if (tabMap.containsKey(className)) {
            return tabMap.get(className);
        }

        return getTabName(className);
    }

    /**
     * 根据Mapper获取表名
     *
     * @param className Mapper类名
     * @return 表名
     */
    private String getTabName(String className) {
        Class clazz = ClassHelper.getEntityClass(className);
        if (clazz == null) {
            return null;
        }

        TableName annotation = (TableName) clazz.getAnnotation(TableName.class);

        String tabName = annotation.value();
        if (tabName != null && !tabMap.containsKey(className)) {
            tabMap.put(className, tabName);
        }

        return tabName;
    }

    @Override
    public List<IdNameEntity> selectUserFuzzy(String name) {
        name = StringHelper.getLikeStr(name);

        return baseQueryMapper.selectUserFuzzy(name);
    }

    @Override
    public List<IdNameEntity> selectDepFuzzy(String name) {
        name = StringHelper.getLikeStr(name);

        return baseQueryMapper.selectDepFuzzy(name);
    }

    @Override
    public List<TabEntity> selectTabs() {
        return baseQueryMapper.selectTabs();
    }

    @Override
    public List<DictEntity> selectFields(String ns, String tab) {
        return baseQueryMapper.selectFields(ns, tab);
    }

    @Override
    public List<DomainEntity> selectDomains(String ns, String tab) {
        return baseQueryMapper.selectDomains(ns, tab);
    }
}