// Copyright 2022 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package com.pingcap.baresharding.controller;

import com.pingcap.baresharding.repository.GitHubEventsMapper;
import com.pingcap.vo.DailyEventVO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

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

/**
 * EventController
 *
 * @author Icemap
 * @date 2022/11/30
 */
@RequestMapping("/event")
@RestController
public class EventController {
    @Autowired
    GitHubEventsMapper eventsMapper;

    @GetMapping("/daily")
    public List<DailyEventVO> getEventDaily() {
        Map<String, Long> eventMap = new HashMap<>();
        for (int shardID = 0; shardID < GitHubEventsMapper.SHARD_NUMBER; shardID++) {
            eventsMapper.eventsDaily(shardID).forEach(event ->
                    eventMap.merge(event.eventDay(), event.events(), Long::sum)
            );
        }

        return eventMap.entrySet().stream()
                .map(es -> new DailyEventVO(es.getKey(), es.getValue()))
                .collect(Collectors.toList());
    }
}