package goonvif

import (
	"context"
	"errors"
	"net"
	"net/http"
	"strings"
	"time"

	"git.pyer.club/kingecg/goonvif/onvif"
	device "git.pyer.club/kingecg/goonvif/onvif/device"
	"git.pyer.club/kingecg/goonvif/onvif/media"
	sdk "git.pyer.club/kingecg/goonvif/onvif/sdk/device"
	media_sdk "git.pyer.club/kingecg/goonvif/onvif/sdk/media"
	wsdiscovery "git.pyer.club/kingecg/goonvif/onvif/ws-discovery"
	"git.pyer.club/kingecg/goonvif/onvif/xsd"
	onvifmodel "git.pyer.club/kingecg/goonvif/onvif/xsd/onvif"
	"git.pyer.club/kingecg/goonvif/replay"
	replay_sdk "git.pyer.club/kingecg/goonvif/sdk/replay"
	search_sdk "git.pyer.club/kingecg/goonvif/sdk/search"
	"git.pyer.club/kingecg/goonvif/search"
	"github.com/beevik/etree"
)

type Device struct {
	onvif.DeviceParams
	device           *onvif.Device
	ctx              context.Context
	mediaCapablities *media.Capabilities
}

var ErrAuthRequired = errors.New("auth required")

func NewDevice(params onvif.DeviceParams) *Device {
	return &Device{DeviceParams: params, ctx: context.Background()}
}

func (d *Device) check() error {
	if d.device != nil {
		return nil
	}
	if d.Username == "" || d.Password == "" {
		return ErrAuthRequired
	}
	if d.HttpClient == nil {
		d.HttpClient = new(http.Client)
	}

	device, err := onvif.NewDevice(d.DeviceParams)
	if err != nil {
		return err
	}
	d.device = device
	return nil
}
func (d *Device) GetCapabilities() (interface{}, error) {
	err := d.check()
	if err != nil {
		return nil, err
	}
	cap := device.GetCapabilities{Category: "All"}

	getCapabilitiesResponse, err := sdk.Call_GetCapabilities(d.ctx, d.device, cap)
	if err != nil {
		return nil, err
	}
	r := getCapabilitiesResponse.Capabilities
	return r, err
}

func (d *Device) GetRecordingSummary() (search.RecordingSummary, error) {
	err := d.check()
	if err != nil {
		return search.RecordingSummary{}, err
	}
	resp, rerr := search_sdk.Call_GetRecordingSummary(d.ctx, d.device, search.GetRecordingSummary{})
	if rerr != nil {
		return search.RecordingSummary{}, rerr
	}
	return resp.Summary, nil
}

func (d *Device) GetEndpoints() (map[string]string, error) {
	err := d.check()
	if err != nil {
		return nil, err
	}
	return d.device.GetServices(), nil
}

func (d *Device) FindRecording(start time.Time, end time.Time) ([]string, error) {
	err := d.check()
	if err != nil {
		return nil, err
	}
	// recordFilterTemplate := "not (boolean(//EarliestRecording > %s) or boolean(//LatestRecording < %s) "
	// filter := fmt.Sprintf(recordFilterTemplate, end.Format("2006-01-02T15:04:05Z"), start.Format("2006-01-02T15:04:05Z"))
	fr, ferr := search_sdk.Call_FindRecordings(d.ctx, d.device, search.FindRecordings{})
	if ferr != nil {
		return nil, ferr
	}

	searchToken := fr.SearchToken
	resultlist := make([]search.RecordingInformation, 0)
	for {
		gr, gerr := search_sdk.Call_GetRecordingSearchResults(d.ctx, d.device, search.GetRecordingSearchResults{SearchToken: searchToken})
		if gerr != nil {
			return nil, gerr
		}
		if len(gr.ResultList.RecordingInformation) > 0 {
			resultlist = append(resultlist, gr.ResultList.RecordingInformation...)
		}
		if gr.ResultList.SearchState == "Completed" {
			break
		}
	}
	recordingTokes := make([]string, 0)
	for _, r := range resultlist {
		rstartStr := string(xsd.DateTime(r.EarliestRecording))
		rendStr := string(xsd.DateTime(r.LatestRecording))
		rstart, _ := time.Parse("2006-01-02T15:04:05Z", rstartStr)
		rend, _ := time.Parse("2006-01-02T15:04:05Z", rendStr)
		if rstart.After(end) || rend.Before(start) {
			continue
		}
		recordingTokes = append(recordingTokes, string(r.RecordingToken))
	}
	return recordingTokes, nil
}

func (d *Device) GetReplayUriTcp(token string) (string, error) {
	return d.GetReplayUri(token, TcpUnicastStreamSetup)
}

func (d *Device) GetReplayUriUdpUnicast(token string) (string, error) {
	return d.GetReplayUri(token, UdpUnicastStreamSetup)
}
func (d *Device) GetReplayUriUdpMulticast(token string) (string, error) {
	return d.GetReplayUri(token, RtspMulticastStreamSetup)
}

func (d *Device) GetMediaCapablities() (media.Capabilities, error) {
	err := d.check()
	if err != nil {
		return media.Capabilities{}, err
	}
	if d.mediaCapablities != nil {
		return *d.mediaCapablities, nil
	}
	resp, err := media_sdk.Call_GetServiceCapabilities(d.ctx, d.device, media.GetServiceCapabilities{})
	if err != nil {
		return media.Capabilities{}, err
	}
	d.mediaCapablities = &resp.Capabilities
	return resp.Capabilities, nil
}

// GetReplayUri 获取设备回放的URI。
// 参数:
//
//	token: 用于标识回放的令牌。
//	transport: 传输协议，UDP=RTP/UDP, RTSP=RTP/RTSP/TCP or HTTP=RTP/RTSP/HTTP/TCP。
//	multiCast: 布尔值，指示是否使用多播。
//
// 返回值:
//
//	string: 回放的URI。
//	error: 错误信息，如果执行操作时发生错误。
func (d *Device) GetReplayUri(token string, stream onvifmodel.StreamSetup) (string, error) {
	// 检查设备状态
	err := d.check()
	if err != nil {
		return "", err
	}
	// 调用SDK方法获取回放URI
	resp, err := replay_sdk.Call_GetReplayUri(d.ctx, d.device, replay.GetReplayUri{StreamSetup: stream, RecordingToken: onvifmodel.ReferenceToken(token)})
	if err != nil {
		return "", err
	}

	// 返回获取到的URI
	return string(resp.Uri), nil
}

func (d *Device) GetStreamUri(stream onvifmodel.StreamSetup, profileToken string) (string, error) {
	err := d.check()
	if err != nil {
		return "", err
	}
	getStreamUri := media.GetStreamUri{StreamSetup: stream}
	if profileToken != "" {
		getStreamUri.ProfileToken = onvifmodel.ReferenceToken(profileToken)
	}
	resp, rerr := media_sdk.Call_GetStreamUri(d.ctx, d.device, getStreamUri)
	// resp, rerr := media_sdk.Call_GetStreamUri(d.ctx, d.device, media.GetStreamUri{})
	return string(resp.MediaUri.Uri), rerr
}

func (d *Device) GetStreamUriTcp(profileToken string) (string, error) {
	return d.GetStreamUri(TcpUnicastStreamSetup, profileToken)
}
func (d *Device) GetStreamUriUdp(profileToken string) (string, error) {
	return d.GetStreamUri(UdpUnicastStreamSetup, profileToken)
}

func (d *Device) GetSnapshotUri(profileToken string) (string, error) {
	return "", nil
}

func (d *Device) GetProfiles() ([]onvifmodel.Profile, error) {
	err := d.check()
	if err != nil {
		return nil, err
	}
	resp, err := media_sdk.Call_GetProfiles(d.ctx, d.device, media.GetProfiles{})
	if err != nil {
		return nil, err
	}
	return resp.Profiles, nil
}
func GetAvailableDevicesAtSpecificEthernetInterface(interfaceName string) ([]Device, error) {
	// Call a ws-discovery Probe Message to Discover NVT type Devices
	devices, err := wsdiscovery.SendProbe(interfaceName, nil, []string{"dn:" + onvif.NVT.String()}, map[string]string{"dn": "http://www.onvif.org/ver10/network/wsdl"})
	if err != nil {
		return nil, err
	}

	nvtDevicesSeen := make(map[string]bool)
	nvtDevices := make([]Device, 0)

	for _, j := range devices {
		doc := etree.NewDocument()
		if err := doc.ReadFromString(j); err != nil {
			return nil, err
		}

		for _, xaddr := range doc.Root().FindElements("./Body/ProbeMatches/ProbeMatch/XAddrs") {
			xaddr := strings.Split(strings.Split(xaddr.Text(), " ")[0], "/")[2]
			if !nvtDevicesSeen[xaddr] {
				dev := NewDevice(onvif.DeviceParams{Xaddr: strings.Split(xaddr, " ")[0]})
				nvtDevicesSeen[xaddr] = true
				nvtDevices = append(nvtDevices, *dev)
			}
		}
	}

	return nvtDevices, nil
}

func Discovery() ([]Device, error) {
	ifaces, err := listLocalNetworkInterfaces()
	if err != nil {
		return nil, err
	}

	devices := make([]Device, 0)

	for _, iface := range ifaces {
		idevices, err := GetAvailableDevicesAtSpecificEthernetInterface(iface)
		if err != nil {
			continue
		}
		devices = append(devices, idevices...)
	}

	return devices, nil

}

func listLocalNetworkInterfaces() ([]string, error) {

	interfaces, err := net.Interfaces()
	if err != nil {
		return nil, err
	}

	var ifaceNames []string
	for _, iface := range interfaces {
		// 判断是否为局域网
		if (iface.Flags&net.FlagUp) == 0 || (iface.Flags&net.FlagRunning) == 0 || (iface.Flags&net.FlagLoopback) != 0 {
			continue
		}
		ifaceNames = append(ifaceNames, iface.Name)
	}

	return ifaceNames, nil
}