package com.imyeyu.spring.util;

import com.imyeyu.java.bean.timi.TimiException;
import com.imyeyu.spring.mapper.BaseMapper;
import org.apache.ibatis.builder.annotation.ProviderContext;

import java.util.stream.Collectors;

/**
 * 原始 Mapper SQL 代理器
 *
 * @author 夜雨
 * @since 2026-01-05 13:00
 */
public class RawSQLProvider extends SQLProvider {

	@Override
	public String selectAll(ProviderContext context) {
		EntityMeta meta = getEntityMeta(context);
		return "SELECT * FROM %s WHERE 1 = 1".formatted(meta.table);
	}

	@Override
	public String select(ProviderContext context, Object id) {
		EntityMeta meta = getEntityMeta(context);
		TimiException.required(meta.idFieldColumn, "not found id field in %s".formatted(meta.entityClass));
		return "SELECT %s FROM `%s` WHERE `%s` = #{%s}".formatted(meta.selectAllClause, meta.table, meta.idFieldColumn.columnName, id) + " LIMIT 1";
	}

	@Override
	public String selectByExample(Object entity) {
		return selectAllByExample(entity) + BaseMapper.LIMIT_1;
	}

	@Override
	public String selectAllByExample(Object entity) {
		EntityMeta meta = getEntityMeta(entity.getClass());
		String conditionClause = meta.fieldColumnList.stream()
		                                             .filter(fc -> fc.isNotEmpty(entity))
		                                             .map(fc -> "`%s` = #{%s}".formatted(fc.columnName, fc.fieldName))
		                                             .collect(Collectors.joining(" AND "));
		return "SELECT %s FROM `%s` WHERE %s".formatted(meta.selectAllClause, meta.table, conditionClause);
	}
}