package com.ruoyi.web.controller.device;

import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.server.ResponseStatusException;
import com.ruoyi.common.annotation.Anonymous;
import com.ruoyi.device.bts.BtsDevelopmentSimulator;
import com.ruoyi.device.bts.BtsDevelopmentSimulator.StateSnapshot;
import com.ruoyi.device.model.DeviceWorkStatus;

/** 本机临时 BTS 模拟器控制 API。 */
@Anonymous
@RestController
public class BtsDevelopmentSimulatorController
{
    private final BtsDevelopmentSimulator simulator;

    public BtsDevelopmentSimulatorController(BtsDevelopmentSimulator simulator)
    {
        this.simulator = simulator;
    }

    /** 返回临时控制页；匿名放行后仍由本机拦截器限制来源。 */
    @GetMapping(value = "/dev/bts-simulator.html", produces = MediaType.TEXT_HTML_VALUE)
    public Resource page()
    {
        return new ClassPathResource("static/dev/bts-simulator.html");
    }

    /** 返回模拟器、虚拟设备、通道和最近请求的当前快照。 */
    @GetMapping("/dev/bts-simulator/state")
    public StateSnapshot state()
    {
        return simulator.snapshot();
    }

    /** 添加一台虚拟设备。 */
    @PostMapping("/dev/bts-simulator/devices")
    public StateSnapshot createDevice(@RequestBody CreateDeviceCommand command)
    {
        try
        {
            simulator.addDevice(command.ip(), command.channelCount());
            return simulator.snapshot();
        }
        catch (IllegalArgumentException exception)
        {
            throw badRequest(exception);
        }
    }

    /** 修改指定虚拟设备的地址、通道数和在线状态。 */
    @PutMapping("/dev/bts-simulator/devices/{deviceId}")
    public StateSnapshot updateDevice(@PathVariable int deviceId, @RequestBody DeviceStateCommand command)
    {
        try
        {
            simulator.updateDevice(deviceId, command.ip(), command.channelCount(), command.online());
            return simulator.snapshot();
        }
        catch (IllegalArgumentException exception)
        {
            throw badRequest(exception);
        }
    }

    /** 删除指定虚拟设备。 */
    @DeleteMapping("/dev/bts-simulator/devices/{deviceId}")
    public StateSnapshot deleteDevice(@PathVariable int deviceId)
    {
        try
        {
            simulator.deleteDevice(deviceId);
            return simulator.snapshot();
        }
        catch (IllegalArgumentException exception)
        {
            throw badRequest(exception);
        }
    }

    /** 修改指定虚拟设备通道的在线和工作状态。 */
    @PutMapping("/dev/bts-simulator/devices/{deviceId}/channels/{channelId}")
    public StateSnapshot updateChannel(@PathVariable int deviceId, @PathVariable int channelId,
            @RequestBody ChannelStateCommand command)
    {
        try
        {
            simulator.updateChannel(deviceId, channelId, command.online(), command.workStatus());
            return simulator.snapshot();
        }
        catch (IllegalArgumentException exception)
        {
            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, exception.getMessage(), exception);
        }
    }

    private ResponseStatusException badRequest(IllegalArgumentException exception)
    {
        return new ResponseStatusException(HttpStatus.BAD_REQUEST, exception.getMessage(), exception);
    }

    public record CreateDeviceCommand(String ip, int channelCount) { }

    public record DeviceStateCommand(String ip, int channelCount, boolean online) { }

    public record ChannelStateCommand(boolean online, DeviceWorkStatus workStatus) { }
}