package com.usthe.alert.controller;

import com.usthe.common.entity.alerter.AlertDefine;
import com.usthe.alert.service.AlertDefineService;
import com.usthe.common.entity.dto.Message;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Sort;
import org.springframework.data.jpa.domain.Specification;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.Predicate;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;

import static org.springframework.http.MediaType.APPLICATION_JSON_VALUE;

/**
 * 告警定义批量API
 * @author tom
 * @date 2021/12/9 10:32
 */
@Api(tags = "告警定义管理API")
@RestController
@RequestMapping(path = "/alert/defines", produces = {APPLICATION_JSON_VALUE})
public class AlertDefinesController {

    @Autowired
    private AlertDefineService alertDefineService;

    @GetMapping
    @ApiOperation(value = "查询告警定义列表", notes = "根据查询过滤项获取告警定义信息列表")
    public ResponseEntity<Message<Page<AlertDefine>>> getAlertDefines(
            @ApiParam(value = "告警定义ID", example = "6565463543") @RequestParam(required = false) List<Long> ids,
            @ApiParam(value = "告警定义级别", example = "6565463543") @RequestParam(required = false) Byte priority,
            @ApiParam(value = "排序字段，默认id", example = "id") @RequestParam(defaultValue = "id") String sort,
            @ApiParam(value = "排序方式，asc:升序，desc:降序", example = "desc") @RequestParam(defaultValue = "desc") String order,
            @ApiParam(value = "列表当前分页", example = "0") @RequestParam(defaultValue = "0") int pageIndex,
            @ApiParam(value = "列表分页数量", example = "8") @RequestParam(defaultValue = "8") int pageSize) {

        Specification<AlertDefine> specification = (root, query, criteriaBuilder) -> {
            List<Predicate> andList = new ArrayList<>();
            if (ids != null && !ids.isEmpty()) {
                CriteriaBuilder.In<Long> inPredicate= criteriaBuilder.in(root.get("id"));
                for (long id : ids) {
                    inPredicate.value(id);
                }
                andList.add(inPredicate);
            }
            if (priority != null) {
                Predicate predicate = criteriaBuilder.equal(root.get("priority"), priority);
                andList.add(predicate);
            }
            Predicate[] predicates = new Predicate[andList.size()];
            return criteriaBuilder.and(andList.toArray(predicates));
        };
        // 分页是必须的
        Sort sortExp = Sort.by(new Sort.Order(Sort.Direction.fromString(order), sort));
        PageRequest pageRequest = PageRequest.of(pageIndex, pageSize, sortExp);
        Page<AlertDefine> alertDefinePage = alertDefineService.getAlertDefines(specification,pageRequest);
        Message<Page<AlertDefine>> message = new Message<>(alertDefinePage);
        return ResponseEntity.ok(message);
    }

    @DeleteMapping
    @ApiOperation(value = "批量删除告警定义", notes = "根据告警定义ID列表批量删除告警定义")
    public ResponseEntity<Message<Void>> deleteAlertDefines(
            @ApiParam(value = "告警定义IDs", example = "6565463543") @RequestParam(required = false) List<Long> ids
    ) {
        if (ids != null && !ids.isEmpty()) {
            alertDefineService.deleteAlertDefines(new HashSet<>(ids));
        }
        Message<Void> message = new Message<>();
        return ResponseEntity.ok(message);
    }

}
