package service

import (
	"context"
	"fmt"
	"oss/consts"
	"oss/dao"
	"oss/minio"
	"oss/model/dto"
	"oss/model/entity"
	"time"

	"github.com/gogf/gf/v2/os/glog"

	"gitea.com/red-future/common/utils"
	"github.com/gogf/gf/v2/errors/gerror"
	"github.com/gogf/gf/v2/frame/g"
	"github.com/gogf/gf/v2/util/gconv"
)

type file struct{}

// File 存储文件服务
var File = new(file)

func (f *file) DownloadToFile(ctx context.Context, req *dto.DownloadToFileReq) (err error) {
	return minio.DownloadToFile(ctx, req.FileURL, req.LocalPath)
}

func (f *file) UploadFile(ctx context.Context, req *dto.UploadFileReq) (res *dto.UploadFileRes, err error) {
	fileSize := gconv.Int(req.File.Size)
	totalFileSize := 0
	// 获取租户id
	user, err := utils.GetUserInfo(ctx)
	if err != nil {
		glog.Errorf(ctx, "获取用户信息失败: %v", err)
		return
	}
	tenantId := user.TenantId
	// 获取redis-租户存储容量总数key
	tenantOssTotalKey := fmt.Sprintf(consts.TenantOssTotalKey, gconv.String(user.TenantId))
	// 获取redis-租户存储-锁key
	fileLockKey := fmt.Sprintf(consts.FileLockKey, gconv.String(user.TenantId))

	success, err := utils.Lock(ctx, fileLockKey, gconv.Int64(time.Minute*1), func(ctx context.Context) error {
		// 获取redis-租户存储容量总数
		get, err := g.Redis().Get(ctx, tenantOssTotalKey)
		if err != nil {
			glog.Errorf(ctx, "获取redis-租户存储容量总数失败: %v", err)
			return err
		}
		tenantOssTotalEntity := &entity.TenantOssTotal{}
		if g.IsEmpty(get) {
			//查询数据库-获取租户存储容量总数
			getByTenantIdReq := &dto.GetByTenantIdReq{
				TenantId: user.TenantId,
			}
			tenantOssTotalRes, err := dao.TenantOssTotal.GetOneByTenantId(ctx, getByTenantIdReq)
			if err != nil {
				glog.Errorf(ctx, "查询数据库-获取租户存储容量总数失败: %v", err)
				return err
			}
			if tenantOssTotalRes == nil || g.IsEmpty(tenantOssTotalRes.Id) {
				// 数据库中没有该租户的记录，创建默认配置
				tenantOssTotalEntity.TenantId = user.TenantId
				tenantOssTotalEntity.UsedOssSize = 0
				tenantOssTotalEntity.TotalOssSize = g.Cfg().MustGet(ctx, "oss.capacitySize").Int() * 1024 * 1024
			} else {
				tenantOssTotalEntity = tenantOssTotalRes
			}
		} else {
			// 反序列化-redis获取租户存储容量总数
			if err = gconv.Struct(get, tenantOssTotalEntity); err != nil {
				glog.Errorf(ctx, "反序列化-redis获取租户存储容量总数失败: %v", err)
				return err
			}
		}
		tenantId = tenantOssTotalEntity.TenantId
		fileSize = tenantOssTotalEntity.UsedOssSize + fileSize
		totalFileSize = tenantOssTotalEntity.TotalOssSize
		// 设置redis-租户存储容量总数
		tenantOssTotalKeyMap := dto.UpdateUsedOssReq{
			TenantId:     tenantId,
			UsedOssSize:  fileSize,
			TotalOssSize: totalFileSize,
			Creator:      user.UserName,
			Updater:      user.UserName,
		}
		// 修改redis-租户存储容量总数 超时时间10分钟
		if err = g.Redis().SetEX(ctx, tenantOssTotalKey, tenantOssTotalKeyMap, gconv.Int64(time.Minute*10)); err != nil {
			glog.Errorf(ctx, "修改redis-租户存储容量总数 超时时间10分钟失败: %v", err)
			return err
		}
		if fileSize > totalFileSize {
			return gerror.New("存储服务内存不足")
		}
		return nil
	})
	if err != nil {
		return nil, err
	}
	if !success {
		return nil, gerror.New("存储服务内存不足")
	}
	// 上传图片
	var fileURL, fileName, fileFormat string
	fileURL, fileName, fileFormat, err = minio.UploadFile(ctx, req.File)
	if err != nil {
		glog.Errorf(ctx, "上传图片失败: %v", err)
		return nil, err
	}
	// 插入数据库
	ossEntity := &dto.UploadFile{
		TenantId: tenantId,
		FileURL:  fileURL,
		FileSize: fileSize,
	}
	if _, err = dao.File.Insert(ctx, ossEntity); err != nil {
		return nil, err
	}
	// 返回图片url
	res = &dto.UploadFileRes{
		FileURL:    fileURL,
		FileSize:   fileSize,
		FileName:   fileName,
		FileFormat: fileFormat,
	}
	url, err := utils.GetFileAddressPrefix(ctx)
	if err != nil {
		return
	}
	res.FileAddressPrefix = url
	return
}

// UploadFileBytes 上传文件(字节流)
func (f *file) UploadFileBytes(ctx context.Context, req *dto.UploadFileBytesReq) (res *dto.UploadFileRes, err error) {
	// 获取用户信息
	user, err := utils.GetUserInfo(ctx)
	if err != nil {
		glog.Errorf(ctx, "获取用户信息失败: %v", err)
		return
	}
	tenantId := user.TenantId

	// 上传到 MinIO
	fileURL, fileFormat, err := minio.UploadFileBytes(ctx, req.FileName, req.FileBytes, req.FileStoreURL)
	if err != nil {
		glog.Errorf(ctx, "上传文件失败: %v", err)
		return nil, err
	}

	// 插入数据库记录
	ossEntity := &dto.UploadFile{
		TenantId: tenantId,
		FileURL:  fileURL,
		FileSize: len(req.FileBytes),
	}
	if _, err = dao.File.Insert(ctx, ossEntity); err != nil {
		return nil, err
	}

	res = &dto.UploadFileRes{
		FileURL:    fileURL,
		FileSize:   len(req.FileBytes),
		FileName:   req.FileName,
		FileFormat: fileFormat,
	}
	res.FileAddressPrefix, _ = utils.GetFileAddressPrefix(ctx)
	return
}