package com.ruoyi.system.service.impl;

import com.ruoyi.common.basic.PageInfo;
import com.ruoyi.common.exception.ServiceException;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.system.domain.SysDoorDevice;
import com.ruoyi.system.domain.SysVisitArea;
import com.ruoyi.system.domain.SysVisitorMachine;
import com.ruoyi.system.dto.SysVisitorMachineAddRequest;
import com.ruoyi.system.dto.SysVisitorMachineDeleteRequest;
import com.ruoyi.system.dto.SysVisitorMachineDetailRequest;
import com.ruoyi.system.dto.SysVisitorMachineEditRequest;
import com.ruoyi.system.dto.SysVisitorMachineLogoutRequest;
import com.ruoyi.system.dto.SysVisitorMachinePageRequest;
import com.ruoyi.system.dto.SysVisitorMachineStatusRequest;
import com.ruoyi.system.mapper.SysVisitAreaMapper;
import com.ruoyi.system.mapper.SysVisitorMachineMapper;
import com.ruoyi.system.service.ISysVisitorMachineService;
import com.ruoyi.system.vo.SysVisitorMachineVO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.util.Date;
import java.util.List;

/**
 * 访客机服务实现
 *
 * @author ruoyi
 */
@Service
public class SysVisitorMachineServiceImpl implements ISysVisitorMachineService
{
    private static final String ONLINE_STATUS_UNACTIVATED = "UNACTIVATED";

    @Autowired
    private SysVisitorMachineMapper visitorMachineMapper;

    @Autowired
    private SysVisitAreaMapper visitAreaMapper;

    @Override
    public PageInfo<SysVisitorMachineVO> pageList(SysVisitorMachinePageRequest request)
    {
        SysVisitorMachinePageRequest query = request == null ? new SysVisitorMachinePageRequest() : request;
        query.setDeviceName(StringUtils.trim(query.getDeviceName()));
        query.setDeviceId(StringUtils.trim(query.getDeviceId()));
        query.setOnlineStatus(StringUtils.trim(query.getOnlineStatus()));
        PageInfo<SysVisitorMachineVO> pageInfo = new PageInfo<SysVisitorMachineVO>(query.getPageNum(), query.getPageSize());
        List<SysVisitorMachineVO> list = visitorMachineMapper.pageList(query, pageInfo);
        pageInfo.setRecords(list);
        return pageInfo;
    }

    @Override
    public SysVisitorMachineVO detail(SysVisitorMachineDetailRequest request)
    {
        Long machineId = getRequiredMachineId(request == null ? null : request.getMachineId());
        SysVisitorMachineVO detail = visitorMachineMapper.selectVoById(machineId);
        if (detail == null)
        {
            throw new ServiceException("访客机不存在");
        }
        return detail;
    }

    @Override
    public int add(SysVisitorMachineAddRequest request, String username)
    {
        if (request == null)
        {
            throw new ServiceException("访客机内容不能为空");
        }
        SysVisitorMachine machine = buildMachine(request.getAreaId(), request.getDeviceName(), request.getBrand(),
                request.getDeviceId(), request.getRemark(), request.getEnabled(), null);
        machine.setOnlineStatus(ONLINE_STATUS_UNACTIVATED);
        machine.setCreateBy(username);
        return visitorMachineMapper.insertMachine(machine);
    }

    @Override
    public int edit(SysVisitorMachineEditRequest request, String username)
    {
        if (request == null)
        {
            throw new ServiceException("访客机内容不能为空");
        }
        Long machineId = getRequiredMachineId(request.getMachineId());
        if (visitorMachineMapper.selectById(machineId) == null)
        {
            throw new ServiceException("访客机不存在");
        }
        SysVisitorMachine machine = buildMachine(request.getAreaId(), request.getDeviceName(), request.getBrand(),
                request.getDeviceId(), request.getRemark(), request.getEnabled(), machineId);
        machine.setMachineId(machineId);
        machine.setUpdateBy(username);
        return visitorMachineMapper.updateMachine(machine);
    }

    @Override
    public int changeStatus(SysVisitorMachineStatusRequest request, String username)
    {
        List<Long> machineIds = getRequiredMachineIds(request == null ? null : request.getMachineIds());
        if (request.getEnabled() == null)
        {
            throw new ServiceException("启用状态不能为空");
        }
        return visitorMachineMapper.updateEnabled(machineIds, request.getEnabled(), username);
    }

    @Override
    public int logout(SysVisitorMachineLogoutRequest request, String username)
    {
        List<Long> machineIds = getRequiredMachineIds(request == null ? null : request.getMachineIds());
        return visitorMachineMapper.updateOnlineStatus(machineIds, ONLINE_STATUS_UNACTIVATED, username);
    }

    @Override
    public int delete(SysVisitorMachineDeleteRequest request, String username)
    {
        List<Long> machineIds = getRequiredMachineIds(request == null ? null : request.getMachineIds());
        return visitorMachineMapper.deleteByIds(machineIds, username);
    }

    private SysVisitorMachine buildMachine(Long areaId, String deviceName, String brand, String deviceId, String remark,
                                           Boolean enabled, Long excludeMachineId)
    {
        Long requiredAreaId = getRequiredAreaId(areaId);
        SysVisitArea area = visitAreaMapper.selectById(requiredAreaId);
        if (area == null)
        {
            throw new ServiceException("所属区域不存在");
        }
        String requiredDeviceName = getRequiredText(deviceName, "设备名称不能为空");
        String requiredBrand = getRequiredText(brand, "品牌不能为空");
        String requiredDeviceId = getRequiredText(deviceId, "设备ID不能为空");
        if (visitorMachineMapper.checkDeviceIdUnique(requiredDeviceId, excludeMachineId) != null)
        {
            throw new ServiceException("设备ID已存在");
        }

        SysVisitorMachine machine = new SysVisitorMachine();
        machine.setAreaId(requiredAreaId);
        machine.setDeviceName(requiredDeviceName);
        machine.setBrand(requiredBrand);
        machine.setDeviceId(requiredDeviceId);
        machine.setRemark(StringUtils.trim(remark));
        machine.setEnabled(enabled == null ? Boolean.TRUE : enabled);
        return machine;
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public int activateDevice(Long deviceId) {
        // 1. 根据deviceId查询设备
        SysVisitorMachine device = visitorMachineMapper.selectById(deviceId);
        if (device == null || device.getDelFlag().equals("1")) {
            throw new ServiceException("设备不存在，请先添加设备");
        }

        // 2. 检查是否已激活
        if ("ONLINE".equals(device.getOnlineStatus()) || "ACTIVATED".equals(device.getOnlineStatus())) {
            throw new ServiceException("设备已激活，无需重复操作");
        }

        // 3. 检查设备是否启用
        if (device.getEnabled() == null || !device.getEnabled()) {
            throw new ServiceException("设备未启用，请先在后台启用设备");
        }

        // 4. 更新状态为激活/在线
        SysVisitorMachine update = new SysVisitorMachine();
        update.setMachineId(device.getMachineId());
        update.setOnlineStatus("ONLINE");  // 或 "ACTIVATED"，根据你的枚举定义
        update.setUpdateTime(new Date());

        return visitorMachineMapper.updateMachine(update);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public int deactivateDevice(Long deviceId) {
        // 1. 根据deviceId查询设备
        SysVisitorMachine device = visitorMachineMapper.selectById(deviceId);
        if (device == null || device.getDelFlag().equals("1")) {
            throw new ServiceException("设备不存在");
        }

        // 2. 检查是否已注销
        if ("OFFLINE".equals(device.getOnlineStatus()) || "UNACTIVATED".equals(device.getOnlineStatus())) {
            throw new ServiceException("设备已注销，无需重复操作");
        }

        // 3. 更新状态为离线/未激活
        SysVisitorMachine update = new SysVisitorMachine();
        update.setMachineId(deviceId);
        update.setOnlineStatus("OFFLINE");  // 或 "UNACTIVATED"
        update.setUpdateTime(new Date());

        return visitorMachineMapper.updateMachine(update);
    }

    private Long getRequiredAreaId(Long areaId)
    {
        if (areaId == null || areaId <= 0)
        {
            throw new ServiceException("所属区域不能为空");
        }
        return areaId;
    }

    private Long getRequiredMachineId(Long machineId)
    {
        if (machineId == null || machineId <= 0)
        {
            throw new ServiceException("访客机主键不能为空");
        }
        return machineId;
    }

    private List<Long> getRequiredMachineIds(List<Long> machineIds)
    {
        if (CollectionUtils.isEmpty(machineIds))
        {
            throw new ServiceException("访客机主键集合不能为空");
        }
        for (Long machineId : machineIds)
        {
            getRequiredMachineId(machineId);
        }
        return machineIds;
    }

    private String getRequiredText(String value, String message)
    {
        String result = StringUtils.trim(value);
        if (StringUtils.isEmpty(result))
        {
            throw new ServiceException(message);
        }
        return result;
    }
}