package service

import (
	"context"
	"crypto/md5"
	"encoding/hex"
	"fmt"
	"git.hpds.cc/Component/logging"
	"github.com/minio/minio-go/v7/pkg/credentials"
	"hpds-iot-web/config"
	"hpds-iot-web/internal/proto"
	"hpds-iot-web/model"
	"io"
	"mime/multipart"
	"net/http"
	"strings"
	"time"
	"xorm.io/xorm"

	"github.com/minio/minio-go/v7"
)

type FileService interface {
	UploadFile(ctx context.Context, req proto.UploadFileRequest) (rsp *proto.BaseResponse, err error)
	UploadFileToMinIo(ctx context.Context, srcFile *multipart.FileHeader, scene string, datasetId, creator int64, dataType int) (data *model.FileManager, err error)
	FileList(ctx context.Context, req proto.DatasetItemRequest) (rsp *proto.BaseResponse, err error)
}

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

func (rp *repo) UploadFile(ctx context.Context, req proto.UploadFileRequest) (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.FileManager, len(req.Files))
		fileUrl := make([]string, len(req.Files))
		for k := range req.Files {
			fileItem, err := rp.UploadFileToMinIo(ctx, req.Files[k], req.Scene, req.DatasetId, req.Creator, req.DataType)
			if err != nil {
				goto ReturnPoint
			}
			list[k] = fileItem
			list[k].DatasetId = req.DatasetId
			fileUrl[k] = fileItem.AccessUrl
		}
		_, err = rp.engine.Insert(list)
		res := proto.UploadResponse{
			Url: strings.Join(fileUrl, ","),
		}
		rsp.Code = http.StatusOK
		rsp.Status = http.StatusText(http.StatusOK)
		rsp.Message = "成功"
		rsp.Data = res
		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) UploadFileToMinIo(ctx context.Context, srcFile *multipart.FileHeader, scene string, datasetId, creator int64, dataType int) (data *model.FileManager, err error) {
	file, err := srcFile.Open()
	defer func(file multipart.File) {
		_ = file.Close()
	}(file)
	if err != nil {
		return nil, err
	}

	fileName := srcFile.Filename

	opt := &minio.Options{
		Creds:  credentials.NewStaticV4(rp.AppConfig.Minio.AccessKeyId, rp.AppConfig.Minio.SecretAccessKey, ""),
		Secure: false,
	}
	minioClient, err := minio.New(rp.AppConfig.Minio.Endpoint, opt)
	if err != nil {
		return nil, err
	}

	objPath := fmt.Sprintf("%s/%s/%s", scene, time.Now().Format("20060102"), fileName)
	if datasetId > 0 {
		var h bool
		item := new(model.Dataset)
		h, err = rp.engine.ID(datasetId).Get(item)
		if err != nil {
			return nil, err
		}
		if h && len(item.StoreName) > 0 {
			objPath = fmt.Sprintf("%s/%s/%s/%s", scene, item.StoreName, time.Now().Format("20060102"), fileName)
		}
	}
	//bucketName := fmt.Sprintf("jky-data/%s/%s", scene, time.Now().Format("20060102"))
	info, err := minioClient.PutObject(ctx, rp.AppConfig.Minio.Bucket, objPath, file, srcFile.Size, minio.PutObjectOptions{ContentType: "application/octet-stream"})
	if err != nil {
		return nil, err
	}
	fmt.Println("info =====> ", info)
	accessUrl := fmt.Sprintf("%s://%s/jky-data/%s", rp.AppConfig.Minio.Protocol, rp.AppConfig.Minio.Endpoint, objPath)

	md5hash := md5.New()
	if _, err := io.Copy(md5hash, file); err != nil {
		return nil, err
	}

	data = new(model.FileManager)
	data.FileName = fileName
	data.Scene = scene
	data.AccessUrl = accessUrl
	data.FileSize = srcFile.Size
	data.DataType = dataType
	data.DatasetId = datasetId
	data.Creator = creator
	data.FileMd5 = hex.EncodeToString(md5hash.Sum(nil))
	data.CreateAt = time.Now().Unix()
	data.UpdateAt = time.Now().Unix()
	return data, nil
}

func (rp *repo) FileList(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:
		data := make([]model.FileManager, 0)
		count, err := rp.engine.Where("(? = 0 or dataset_id = ?)", req.DatasetId, req.DatasetId).
			And("(? = 0 or data_type = ?)", req.DataType, req.DataType).
			Limit(int(req.Size), int(((req.Page)-1)*req.Size)).
			FindAndCount(&data)
		if err != nil {
			goto ReturnPoint
		}
		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
}