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/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2014-2017 [email protected]
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package tk.mybatis.mapper.entity;

import org.apache.ibatis.mapping.ResultFlag;
import org.apache.ibatis.mapping.ResultMap;
import org.apache.ibatis.mapping.ResultMapping;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.type.TypeException;
import org.apache.ibatis.type.TypeHandler;
import tk.mybatis.mapper.MapperException;
import tk.mybatis.mapper.util.StringUtil;

import javax.persistence.Table;
import java.lang.reflect.Constructor;
import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * 数据库表
 *
 * @author liuzh
 */
public class EntityTable {
    public static final Pattern DELIMITER = Pattern.compile("^[`\\[\"]?(.*?)[`\\]\"]?$");
    //属性和列对应
    protected Map propertyMap;
    private String name;
    private String catalog;
    private String schema;
    private String orderByClause;
    private String baseSelect;
    //实体类 => 全部列属性
    private Set entityClassColumns;
    //实体类 => 主键信息
    private Set entityClassPKColumns;
    //useGenerator包含多列的时候需要用到
    private List keyProperties;
    private List keyColumns;
    //resultMap对象
    private ResultMap resultMap;
    //类
    private Class entityClass;

    public EntityTable(Class entityClass) {
        this.entityClass = entityClass;
    }

    /**
     * 生成当前实体的resultMap对象
     *
     * @param configuration
     * @return
     */
    public ResultMap getResultMap(Configuration configuration) {
        if (this.resultMap != null) {
            return this.resultMap;
        }
        if (entityClassColumns == null || entityClassColumns.size() == 0) {
            return null;
        }
        List resultMappings = new ArrayList();
        for (EntityColumn entityColumn : entityClassColumns) {
            String column = entityColumn.getColumn();
            //去掉可能存在的分隔符
            Matcher matcher = DELIMITER.matcher(column);
            if(matcher.find()){
                column = matcher.group(1);
            }
            ResultMapping.Builder builder = new ResultMapping.Builder(configuration, entityColumn.getProperty(), column, entityColumn.getJavaType());
            if (entityColumn.getJdbcType() != null) {
                builder.jdbcType(entityColumn.getJdbcType());
            }
            if (entityColumn.getTypeHandler() != null) {
                try {
                    builder.typeHandler(getInstance(entityColumn.getJavaType(),entityColumn.getTypeHandler()));
                } catch (Exception e) {
                    throw new MapperException(e);
                }
            }
            List flags = new ArrayList();
            if (entityColumn.isId()) {
                flags.add(ResultFlag.ID);
            }
            builder.flags(flags);
            resultMappings.add(builder.build());
        }
        ResultMap.Builder builder = new ResultMap.Builder(configuration, "BaseMapperResultMap", this.entityClass, resultMappings, true);
        this.resultMap = builder.build();
        return this.resultMap;
    }

    /**
     * 初始化 - Example 会使用
     */
    public void initPropertyMap() {
        propertyMap = new HashMap(getEntityClassColumns().size());
        for (EntityColumn column : getEntityClassColumns()) {
            propertyMap.put(column.getProperty(), column);
        }
    }

    /**
     * 实例化TypeHandler
     * @param javaTypeClass
     * @param typeHandlerClass
     * @return
     */
    @SuppressWarnings("unchecked")
    public  TypeHandler getInstance(Class javaTypeClass, Class typeHandlerClass) {
        if (javaTypeClass != null) {
          try {
            Constructor c = typeHandlerClass.getConstructor(Class.class);
            return (TypeHandler) c.newInstance(javaTypeClass);
          } catch (NoSuchMethodException ignored) {
            // ignored
          } catch (Exception e) {
            throw new TypeException("Failed invoking constructor for handler " + typeHandlerClass, e);
          }
        }
        try {
          Constructor c = typeHandlerClass.getConstructor();
          return (TypeHandler) c.newInstance();
        } catch (Exception e) {
          throw new TypeException("Unable to find a usable constructor for " + typeHandlerClass, e);
        }
      }

    public String getBaseSelect() {
        return baseSelect;
    }

    public void setBaseSelect(String baseSelect) {
        this.baseSelect = baseSelect;
    }

    public String getCatalog() {
        return catalog;
    }

    public void setCatalog(String catalog) {
        this.catalog = catalog;
    }

    public Class getEntityClass() {
        return entityClass;
    }

    public Set getEntityClassColumns() {
        return entityClassColumns;
    }

    public void setEntityClassColumns(Set entityClassColumns) {
        this.entityClassColumns = entityClassColumns;
    }

    public Set getEntityClassPKColumns() {
        return entityClassPKColumns;
    }

    public void setEntityClassPKColumns(Set entityClassPKColumns) {
        this.entityClassPKColumns = entityClassPKColumns;
    }

    public String[] getKeyColumns() {
        if (keyColumns != null && keyColumns.size() > 0) {
            return keyColumns.toArray(new String[]{});
        }
        return new String[]{};
    }

    public void setKeyColumns(String keyColumn) {
        if (this.keyColumns == null) {
            this.keyColumns = new ArrayList();
            this.keyColumns.add(keyColumn);
        } else {
            this.keyColumns.add(keyColumn);
        }
    }

    public String[] getKeyProperties() {
        if (keyProperties != null && keyProperties.size() > 0) {
            return keyProperties.toArray(new String[]{});
        }
        return new String[]{};
    }

    public void setKeyProperties(String keyProperty) {
        if (this.keyProperties == null) {
            this.keyProperties = new ArrayList();
            this.keyProperties.add(keyProperty);
        } else {
            this.keyProperties.add(keyProperty);
        }
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getOrderByClause() {
        return orderByClause;
    }

    public void setOrderByClause(String orderByClause) {
        this.orderByClause = orderByClause;
    }

    public String getPrefix() {
        if (StringUtil.isNotEmpty(catalog)) {
            return catalog;
        }
        if (StringUtil.isNotEmpty(schema)) {
            return schema;
        }
        return "";
    }

    public Map getPropertyMap() {
        return propertyMap;
    }

    public String getSchema() {
        return schema;
    }

    public void setSchema(String schema) {
        this.schema = schema;
    }

    public void setKeyColumns(List keyColumns) {
        this.keyColumns = keyColumns;
    }

    public void setKeyProperties(List keyProperties) {
        this.keyProperties = keyProperties;
    }

    public void setTable(Table table) {
        this.name = table.name();
        this.catalog = table.catalog();
        this.schema = table.schema();
    }
}