package service

import (
	"context"
	"fmt"
	"git.hpds.cc/Component/logging"
	"hpds-iot-web/config"
	"hpds-iot-web/internal/proto"
	"hpds-iot-web/model"
	"math"
	"math/rand"
	"net/http"
	"time"
	"xorm.io/xorm"
)

type DatasetService interface {
	GetOwnerProjectList(ctx context.Context, req proto.OwnerProjectRequest) (rsp *proto.BaseResponse, err error)
	DatasetList(ctx context.Context, req proto.DatasetRequest) (rsp *proto.BaseResponse, err error)
	ImportDataset(ctx context.Context, req proto.ImportDatasetRequest) (rsp *proto.BaseResponse, err error)
	DatasetInfo(ctx context.Context, req proto.DatasetItemRequest) (rsp *proto.BaseResponse, err error)

	CreateTraining(ctx context.Context, req proto.TrainDatasetRequest) (rsp *proto.BaseResponse, err error)
}

func NewDatasetService(cfg *config.WebConfig, engine *xorm.Engine, logger *logging.Logger) DatasetService {
	return &repo{
		AppConfig: cfg,
		engine:    engine,
		logger:    logger,
	}
}

func (rp *repo) GetOwnerProjectList(ctx context.Context, req proto.OwnerProjectRequest) (rsp *proto.BaseResponse, err error) {
	rsp = new(proto.BaseResponse)
	select {
	case <-ctx.Done():
		err = fmt.Errorf("超时/取消")
		rsp.Code = http.StatusInternalServerError
		rsp.Status = http.StatusText(http.StatusInternalServerError)
		rsp.Message = "超时/取消"
		rsp.Err = ctx.Err()
		return rsp, ctx.Err()
	default:
		ownerList := make([]model.Owner, 0)
		err := rp.engine.Where("(? = '' or owner_name like ?)", req.Key, "%"+req.Key+"%").
			And("status = 1").Find(&ownerList)
		if err != nil {
			goto ReturnPoint
		}
		data := make([]proto.OwnerProjectItem, len(ownerList))
		for k, v := range ownerList {
			projectList := make([]proto.ProjectItem, 0)
			err = rp.engine.Table("project").Cols("concat('"+fmt.Sprintf("%d", v.OwnerId)+"-', project_id) as project_id", "project_name").
				Where("owner_id = ?", v.OwnerId).And("status = 1").Find(&projectList)
			if err != nil {
				goto ReturnPoint
			}
			data[k] = proto.OwnerProjectItem{
				OwnerId:     v.OwnerId,
				OwnerName:   fmt.Sprintf("%s[%s]", v.OwnerName, v.ChargeUser),
				ProjectList: projectList,
			}
		}
		rsp.Code = http.StatusOK
		rsp.Status = http.StatusText(http.StatusOK)
		rsp.Message = "成功"
		rsp.Data = data
		rsp.Err = err
		return rsp, err
	}
ReturnPoint:
	if err != nil {
		rsp.Code = http.StatusInternalServerError
		rsp.Status = http.StatusText(http.StatusInternalServerError)
		rsp.Err = err
		rsp.Message = "失败"
	}
	return rsp, err
}

func (rp *repo) DatasetList(ctx context.Context, req proto.DatasetRequest) (rsp *proto.BaseResponse, err error) {
	rsp = new(proto.BaseResponse)
	select {
	case <-ctx.Done():
		err = fmt.Errorf("超时/取消")
		rsp.Code = http.StatusInternalServerError
		rsp.Status = http.StatusText(http.StatusInternalServerError)
		rsp.Message = "超时/取消"
		rsp.Err = ctx.Err()
		return rsp, ctx.Err()
	default:
		list := make([]model.Dataset, 0)
		st := rp.engine.Where("(? = '' or dataset_name like ?)", req.DatasetName, "%"+req.DatasetName+"%").
			And("(? = '' or create_at >= ?)", req.StartTime, req.StartTime).
			And("(? = '' or create_at < ?)", req.EndTime, req.EndTime).
			And("(? = 0 or owner_id = ?)", req.OwnerId, req.OwnerId).
			And("status = 1")
		if len(req.ProjectId) > 0 {
			st.In("project_id", req.ProjectId)
		}
		count, err := st.Limit(int(req.Size), int(((req.Page)-1)*req.Size)).FindAndCount(&list)
		if err != nil {
			goto ReturnPoint
		}
		data := make([]proto.DatasetItem, len(list))
		for k, v := range list {
			detailList := make([]model.FileManager, 0)
			datasetCount, err := rp.engine.Where("dataset_id = ?", v.DatasetId).And("data_type=1").FindAndCount(&detailList)
			if err != nil {
				goto ReturnPoint
			}
			fm := new(model.FileManager)
			datasetSize, err := rp.engine.Where("dataset_id = ?", v.DatasetId).And("data_type=1").SumInt(fm, "file_size")
			if err != nil {
				goto ReturnPoint
			}
			data[k] = proto.DatasetItem{
				DatasetId:    v.DatasetId,
				DatasetName:  v.DatasetName,
				DatasetDesc:  v.DatasetDesc,
				StoreName:    v.StoreName,
				CategoryId:   v.CategoryId,
				ProjectId:    v.ProjectId,
				OwnerId:      v.OwnerId,
				Creator:      v.Creator,
				CreateAt:     v.CreateAt,
				DatasetCount: datasetCount,
				DatasetSize:  datasetSize,
			}
		}
		rsp.Code = http.StatusOK
		rsp.Status = http.StatusText(http.StatusOK)
		rsp.Message = "成功"
		rsp = FillPaging(count, req.Page, req.Size, data, rsp)
		rsp.Err = err
		return rsp, err
	}
ReturnPoint:
	if err != nil {
		rsp.Code = http.StatusInternalServerError
		rsp.Status = http.StatusText(http.StatusInternalServerError)
		rsp.Err = err
		rsp.Message = "失败"
	}
	return rsp, err
}

func (rp *repo) ImportDataset(ctx context.Context, req proto.ImportDatasetRequest) (rsp *proto.BaseResponse, err error) {
	rsp = new(proto.BaseResponse)
	select {
	case <-ctx.Done():
		err = fmt.Errorf("超时/取消")
		rsp.Code = http.StatusInternalServerError
		rsp.Status = http.StatusText(http.StatusInternalServerError)
		rsp.Message = "超时/取消"
		rsp.Err = ctx.Err()
		return rsp, ctx.Err()
	default:
		item := &model.Dataset{
			DatasetName: req.DatasetName,
			DatasetDesc: req.DatasetDesc,
			CategoryId:  req.CategoryId,
			ProjectId:   req.ProjectId,
			OwnerId:     req.OwnerId,
			StoreName:   req.StoreName,
			Creator:     req.Creator,
			Status:      1,
			CreateAt:    time.Now().Unix(),
			UpdateAt:    time.Now().Unix(),
		}
		_, err = rp.engine.Insert(item)
		if err != nil {
			goto ReturnPoint
		}
		rsp.Code = http.StatusOK
		rsp.Status = http.StatusText(http.StatusOK)
		rsp.Message = "成功"
		rsp.Data = item
		rsp.Err = err
		return rsp, err
	}
ReturnPoint:
	if err != nil {
		rsp.Code = http.StatusInternalServerError
		rsp.Status = http.StatusText(http.StatusInternalServerError)
		rsp.Err = err
		rsp.Message = "失败"
	}
	return rsp, err
}

func (rp *repo) DatasetInfo(ctx context.Context, req proto.DatasetItemRequest) (rsp *proto.BaseResponse, err error) {
	rsp = new(proto.BaseResponse)
	select {
	case <-ctx.Done():
		err = fmt.Errorf("超时/取消")
		rsp.Code = http.StatusInternalServerError
		rsp.Status = http.StatusText(http.StatusInternalServerError)
		rsp.Message = "超时/取消"
		rsp.Err = ctx.Err()
		return rsp, ctx.Err()
	default:
		item := new(model.Dataset)
		var b bool
		b, err = rp.engine.ID(req.DatasetId).Get(item)
		if err != nil {
			goto ReturnPoint
		}
		if !b {
			err = fmt.Errorf("未能找到对应的数据集")
			goto ReturnPoint
		}

		rsp.Code = http.StatusOK
		rsp.Status = http.StatusText(http.StatusOK)
		rsp.Message = "成功"
		rsp.Err = err
		rsp.Data = item
		return rsp, err
	}
ReturnPoint:
	if err != nil {
		rsp.Code = http.StatusInternalServerError
		rsp.Status = http.StatusText(http.StatusInternalServerError)
		rsp.Err = err
		rsp.Message = "失败"
	}
	return rsp, err
}

func (rp *repo) CreateTraining(ctx context.Context, req proto.TrainDatasetRequest) (rsp *proto.BaseResponse, err error) {
	rsp = new(proto.BaseResponse)
	select {
	case <-ctx.Done():
		err = fmt.Errorf("超时/取消")
		rsp.Code = http.StatusInternalServerError
		rsp.Status = http.StatusText(http.StatusInternalServerError)
		rsp.Message = "超时/取消"
		rsp.Err = ctx.Err()
		return rsp, ctx.Err()
	default:
		var (
			h             bool
			trainFileList []model.FileManager
			valFileList   []model.FileManager
			testFileList  []model.FileManager
			//wg            sync.WaitGroup
		)
		log := new(model.DatasetOperationLog)
		dataset := new(model.Dataset)
		h, err = rp.engine.ID(req.DatasetId).Get(dataset)
		if err != nil {
			goto ReturnPoint
		}
		if !h {
			err = fmt.Errorf("未能找到对应的采集数据集")
			goto ReturnPoint
		}
		fileList := make([]model.FileManager, 0)
		err = rp.engine.Where("dataset_id = ?", req.DatasetId).Find(&fileList)
		if err != nil {
			goto ReturnPoint
		}
		if req.TargetData == 0 {
			req.TargetData = len(fileList)
		}
		if req.TargetData > len(fileList) {
			err = fmt.Errorf("超出现有数据集数量")
			goto ReturnPoint
		}
		if req.SplitMethod == 1 { //随机
			rand.Seed(time.Now().UnixNano())
			rand.Shuffle(len(fileList), func(i, j int) {
				fileList[i], fileList[j] = fileList[j], fileList[i]
			})
		}
		trainNumber := int(math.Floor(float64(int64(req.TargetData)*req.TrainNumber) / 100))
		valNumber := int(math.Floor(float64(int64(req.TargetData)*req.ValidationNumber) / 100))
		testNumber := req.TargetData - trainNumber - valNumber
		trainFileList = fileList[:trainNumber-1]
		valFileList = fileList[trainNumber : valNumber-1]
		testFileList = fileList[valNumber:]

		train := new(model.TrainingDataset)
		h, err = rp.engine.Where("name = ?", req.TrainName).Get(train)
		if err != nil {
			goto ReturnPoint
		}
		if !h {
			train.Name = req.TrainName
			train.DatasetDesc = req.TrainDesc
			train.DatasetId = req.DatasetId
			train.CategoryId = dataset.CategoryId
			_, err = rp.engine.Insert(train)
			if err != nil {
				goto ReturnPoint
			}
		}
		log.TargetData = int64(req.TargetData)
		log.DatasetId = req.DatasetId
		log.TrainingDatasetId = train.DatasetId
		log.SplitMethod = req.SplitMethod
		log.TrainNumber = int64(trainNumber)
		log.ValidationNumber = int64(valNumber)
		log.TestNumber = int64(testNumber)
		log.Creator = req.UserId
		_, err = rp.engine.Insert(log)
		if err != nil {
			goto ReturnPoint
		}
		//wg.Add(3)
		go BatchCopyData(trainFileList, train.DatasetId, log.LogId, req.UserId, 1, rp.engine) //, &wg
		go BatchCopyData(valFileList, train.DatasetId, log.LogId, req.UserId, 2, rp.engine)   //, &wg
		go BatchCopyData(testFileList, train.DatasetId, log.LogId, req.UserId, 3, rp.engine)  //, &wg
		//wg.Wait()
		rsp.Code = http.StatusOK
		rsp.Status = http.StatusText(http.StatusOK)
		rsp.Message = "成功"
		rsp.Err = err
		rsp.Data = log
		return rsp, err
	}
ReturnPoint:
	if err != nil {
		rsp.Code = http.StatusInternalServerError
		rsp.Status = http.StatusText(http.StatusInternalServerError)
		rsp.Err = err
		rsp.Message = "失败"
	}
	return rsp, err
}

func BatchCopyData(list []model.FileManager, trainId, logId, userId int64, categoryId int, engine *xorm.Engine) { //, wg *sync.WaitGroup
	batchList := make([]model.TrainingDatasetDetail, len(list))
	for k, v := range list {
		item := model.TrainingDatasetDetail{
			FileName:       v.FileName,
			FilePath:       v.AccessUrl,
			DatasetId:      trainId,
			CategoryId:     categoryId,
			FileSize:       v.FileSize,
			FileMd5:        v.FileMd5,
			OperationLogId: logId,
			Creator:        userId,
			CreateAt:       time.Now().Unix(),
			UpdateAt:       time.Now().Unix(),
		}
		batchList[k] = item
	}
	_, _ = engine.Insert(batchList)
	//wg.Done()
}