package com.terra.system.service.all;

import com.baomidou.mybatisplus.annotation.TableName;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.terra.system.entity.all.RedisCacheKey;
import com.terra.common.entity.all.StaticData;
import com.terra.system.entity.ctrl.IdNameEntity;
import com.terra.system.entity.ctrl.KeyValueEntity;
import com.terra.system.entity.ctrl.TabEntity;
import com.terra.system.entity.data.DictEntity;
import com.terra.system.entity.data.DomainEntity;
import com.terra.system.entity.sys.AttachEntity;
import com.terra.system.helper.AesHelper;
import com.terra.system.helper.ClassHelper;
import com.terra.common.helper.StringHelper;
import com.terra.system.mapper.all.BaseQueryMapper;
import com.terra.system.mapper.all.BasicMapper;
import com.terra.system.mapper.all.GeomBaseMapper;
import javax.annotation.Resource;
import org.springframework.stereotype.Service;

import java.util.*;
import java.util.concurrent.TimeUnit;

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

    @Resource
    RedisService redisService;

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

    /**
     * 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 = convertFiled(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(express, value));
        }
    }

    /**
     * 字段转换
     */
    private String convertFiled(String field) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0, c = field.length(); i < c; i++) {
            char ch = field.charAt(i);
            if (Character.isUpperCase(ch)) {
                sb.append('_');
                sb.append(Character.toLowerCase(ch));
            } else {
                sb.append(ch);
            }
        }

        return sb.toString();
    }

    /**
     * 获取值对象
     *
     * @param val 值
     * @return 对象
     */
    private Object getObjectVal(String express, String val) {
        if (StringHelper.isInteger(val)) {
            return Long.parseLong(val);
        }
        if (StringHelper.isNumeric(val)) {
            return Double.parseDouble(val);
        }
        if (StaticData.IN.equals(express)) {
            return val;
        }

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

    /**
     * 添加包装器
     *
     * @param wrapper QueryWrapper
     * @param field   字段
     * @param express 表达式
     * @param val     值
     */
    private void addWrapper(QueryWrapper wrapper, String field, String express, Object val) {
        if (StringHelper.isDate(val.toString())) {
            wrapper.apply(String.format("%s %s '%s'", field, express, val));
            return;
        }

        switch (express) {
            case "like":
                wrapper.like("UPPER(" + field + ")", val.toString().toUpperCase());
                break;
            case ">":
                wrapper.gt(field, val);
                break;
            case ">=":
                wrapper.ge(field, val);
                break;
            case "<>":
            case "!=":
                wrapper.ne(field, val);
                break;
            case "=":
                wrapper.eq(field, val);
                break;
            case "<":
                wrapper.lt(field, val);
                break;
            case "<=":
                wrapper.le(field, val);
                break;
            case "in":
                if (val.toString().contains(StaticData.SINGLE_QUOTES)) {
                    wrapper.in(field, getStringList(val.toString()));
                } else {
                    wrapper.in(field, getIntegerList(val.toString()));
                }
                break;
            default:
                break;
        }
    }

    /**
     * 获取字符串列表
     */
    private List<String> getStringList(String val) {
        return Arrays.asList(val.replace(StaticData.SINGLE_QUOTES, "").split(StaticData.COMMA));
    }

    /**
     * 获取整数列表
     */
    private List<Integer> getIntegerList(String val) {
        List<Integer> list = new ArrayList<>();
        for (String str : val.split(StaticData.COMMA)) {
            list.add(Integer.parseInt(str));
        }

        return list;
    }

    /**
     * 添加空间过滤条件
     *
     * @param basicMapper 父Mapper
     * @param wrapper     QueryWrapper
     * @param wkt         WKT（著名文本）
     * @throws Exception 异常
     */
    public void addGeomWrapper(BasicMapper basicMapper, QueryWrapper wrapper, String wkt) throws Exception {
        if (basicMapper instanceof GeomBaseMapper && !StringHelper.isEmpty(wkt)) {
            wkt = AesHelper.decrypt(wkt);

            Integer srid = getSrid((GeomBaseMapper) basicMapper);
            wrapper.apply(String.format("ST_Intersects(ST_PolygonFromText('%s', %d), geom)", wkt, srid));
        }
    }

    /**
     * 获取几何对象的空间参考
     *
     * @param basicMapper 空间基础Mapper
     * @return SRID
     */
    public Integer getSrid(GeomBaseMapper basicMapper) {
        String tab = getTabName(basicMapper);
        String key = RedisCacheKey.sridKey(tab);

        Object obj = redisService.get(key);
        if (obj instanceof Integer) {
            return (Integer) obj;
        }

        Integer srid = basicMapper.selectSrid(tab);
        if (null == srid) {
            return StaticData.I4490;
        }
        redisService.put(key, srid, 5, TimeUnit.MINUTES);

        return srid;
    }

    /**
     * 根据Mapper获取表名
     *
     * @param basicMapper Mapper
     * @return 表名
     */
    public static 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 static 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;
    }

    /**
     * 添加缓冲区过滤条件
     *
     * @param baseMapper 父Mapper
     * @param wrapper    QueryWrapper
     * @param wkt        WKT（著名文本）
     */
    public void addBufferWrapper(GeomBaseMapper baseMapper, QueryWrapper wrapper, String wkt, double buffer) {
        Integer srid = getSrid(baseMapper);
        // buffer = buffer * 0.00000899928
        buffer = buffer / 1852 / 60;

        wrapper.apply(String.format("ST_Intersects(geom, ST_Buffer(ST_GeomFromText('%s', %d), %f, 'endcap=round join=round'))", wkt, srid, buffer));
    }

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

        return baseQueryMapper.selectUserFuzzy(name);
    }

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

        return baseQueryMapper.selectDepFuzzy(name);
    }

    @Override
    public Integer selectTabsForCount(String tab, String typesFilter, String field) {
        tab = StringHelper.getLikeUpperStr(tab);

        return baseQueryMapper.selectTabsForCount(tab, typesFilter, field);
    }

    @Override
    public List<TabEntity> selectTabsByPage(String tab, String typesFilter, String field, String filters, Integer limit, Integer offset) {
        tab = StringHelper.getLikeUpperStr(tab);

        return baseQueryMapper.selectTabsByPage(tab, typesFilter, field, filters, limit, offset);
    }

    @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);
    }

    @Override
    public String selectRoute(double x1, double y1, double x2, double y2) {
        return baseQueryMapper.selectRoute(x1, y1, x2, y2);
    }

    @Override
    public List<KeyValueEntity> selectLocation(String wkt) {
        return baseQueryMapper.selectLocation(wkt);
    }

    @Override
    public List<KeyValueEntity> selectDirTypes(String name) {
        name = StringHelper.getLikeUpperStr(name);

        return baseQueryMapper.selectDirTypes(name);
    }

    @Override
    public List<KeyValueEntity> selectDirsByTypes(String[] types, String dirs) {
        return baseQueryMapper.selectDirsByTypes(types, dirs);
    }

    @Override
    public List<AttachEntity> selectAnnexByTab(String tab, String gids) {
        return baseQueryMapper.selectAnnexByTab(tab, gids);
    }
}