package dao

import (
	"StuAcaWorksAI/proto"
	"gorm.io/gorm"
	"log"
)

type File struct {
	gorm.Model
	// 存储文件名
	FileStoreName string `gorm:"column:file_store_name;type:varchar(255);uniqueIndex:idx_file_name"`
	NeedAuth      bool   `gorm:"column:need_auth"`
	FileName      string `gorm:"column:file_name"`
	FileSize      int    `gorm:"column:file_size"`
	FileType      string `gorm:"column:file_type"`
	FilePath      string `gorm:"column:file_path"`
	AuthID        int    `gorm:"column:auth_id"`
	Md5           string `gorm:"column:md5;type:varchar(255);uniqueIndex:idx_file_name"`
}

type FileAuth struct {
	gorm.Model
	AuthID       int    `gorm:"column:auth_id"`
	FileID       int    `gorm:"column:file_id"`
	UserFileName string `gorm:"column:user_file_name;type:varchar(255);uniqueIndex:idx_file_name"` //对于同一个文件，不同用户有不同的文件名
	UploadType   string `gorm:"column:upload_type"`                                                // 上传类型: im,avatar,file,config,config为系统文件
	IsPrivate    int    `gorm:"column:is_private"`                                                 // 是否私有,私有文件只能自己下载或者通过分享链接下载,1为私有，0为公开
	ShareCode    string `gorm:"column:share_code"`                                                 // 分享码，用于分享时的验证，构建分享链接
}

type ConfigFile struct {
	gorm.Model
	AuthID   int    `gorm:"column:auth_id"`
	FileName string `gorm:"column:file_name"`
	FilePath string `gorm:"column:file_path"`
}

type FileAuthListResp struct {
	FileAuth
	FileStoreName string `gorm:"column:file_store_name;type:varchar(255);uniqueIndex:idx_file_name"`
}

type UserFileListResp struct {
	FileAuth
	FileStoreName string `json:"file_store_name" form:"file_store_name"`
}

func CreateFile(fileStoreName, fileName, fileType, filePath, md5Str string, fileSize, authID int, NeedAuth bool) File {
	file := File{FileStoreName: fileStoreName, FileName: fileName, FileType: fileType, FilePath: filePath, FileSize: fileSize, AuthID: authID, NeedAuth: NeedAuth, Md5: md5Str}
	result := DB.Create(&file)
	if result.Error != nil {
		return File{}
	}
	return file
}

func DeleteFileByID(id, user int) bool {
	res := DB.Model(&File{}).Where("id = ? and auth_id = ?", id, user).Delete(&File{})
	if res.Error != nil {
		return false
	}
	return true
}

func FindFileByID(id, auth_id int) File {
	var file File
	DB.Where("id = ? and auth_id = ?", id, auth_id).First(&file)
	return file
}

func FindFileByNames(fileName string, auth_id int) File {
	var file File
	DB.Where("file_name = ? and auth_id = ?", fileName, auth_id).First(&file)
	return file
}

func FindFileByName(fileName string) File {
	var file File
	DB.Where("file_store_name = ?", fileName).First(&file)
	return file
}

func FindFileByAuthID(auth_id int) []File {
	var files []File
	DB.Where("auth_id = ?", auth_id).Find(&files)
	return files
}

func UpdateFileByID(id, auth_id int, fileStoreName, fileName, fileType, filePath string, fileSize int) bool {
	pd := FindFileByID(id, auth_id)
	if pd.ID == 0 {
		return false
	}
	result := DB.Model(&File{}).Where("id = ? and auth_id = ?", id, auth_id).Updates(File{FileStoreName: fileStoreName, FileName: fileName, FileType: fileType, FilePath: filePath, FileSize: fileSize})
	if result.Error != nil {
		return false
	}
	return true
}

func DeleteFileByAuthID(auth_id int) bool {
	res := DB.Model(&File{}).Where("auth_id = ?", auth_id).Delete(&File{})
	if res.Error != nil {
		return false
	}
	return true
}

func DeleteFileById(id int) bool {
	res := DB.Model(&File{}).Where("id = ?", id).Delete(&File{})
	if res.Error != nil {
		return false
	}
	return true
}

func FindFileByMd5(md5 string) File {
	var file File
	if proto.Config.SERVER_SQL_LOG {
		DB.Debug().Where("md5 = ?", md5).First(&file)
	} else {
		DB.Where("md5 = ?", md5).First(&file)
	}
	return file
}

func CreateFileAuth(authID, fileID int, userFileName, uploadType string, isPrivate int, shareCode string) FileAuth {
	fileAuth := FileAuth{AuthID: authID, FileID: fileID, UserFileName: userFileName, UploadType: uploadType, IsPrivate: isPrivate, ShareCode: shareCode}
	var result *gorm.DB
	if proto.Config.SERVER_SQL_LOG {
		result = DB.Debug().Create(&fileAuth)
	} else {
		result = DB.Create(&fileAuth)
	}
	if result.Error != nil {
		return FileAuth{}
	}
	return fileAuth
}

func CreateConfigFile(file ConfigFile) (id uint, err error) {
	var result *gorm.DB
	if proto.Config.SERVER_SQL_LOG {
		result = DB.Debug().Create(&file)
	} else {
		result = DB.Create(&file)
	}
	return file.ID, result.Error
}

func FindConfigFileByID(id int, user_id int) ConfigFile {
	var file ConfigFile
	if proto.Config.SERVER_SQL_LOG {
		DB.Debug().Where("id = ? and auth_id = ?", id, user_id).First(&file)
	} else {
		DB.Where("id = ? and auth_id = ?", id, user_id).First(&file)
	}
	return file
}

func DeleteConfigFileByID(id int) error {
	var res *gorm.DB
	if proto.Config.SERVER_SQL_LOG {
		res = DB.Debug().Delete(&ConfigFile{}, id)
	} else {
		res = DB.Delete(&ConfigFile{}, id)
	}
	return res.Error
}

func UpdateConfigFileByID(id int, file ConfigFile) error {
	var res *gorm.DB
	if proto.Config.SERVER_SQL_LOG {
		res = DB.Debug().Model(&ConfigFile{}).Where("id = ?", id).Updates(&file)
	} else {
		res = DB.Model(&ConfigFile{}).Where("id = ?", id).Updates(&file)
	}
	return res.Error
}

func FindConfigFileByAuthID(auth_id int) []ConfigFile {
	var files []ConfigFile
	if proto.Config.SERVER_SQL_LOG {
		DB.Debug().Where("auth_id = ?", auth_id).Find(&files)
	} else {
		DB.Where("auth_id = ?", auth_id).Find(&files)
	}
	return files
}

// 通用通过用户id及类型查询
func FileUserFileList(userID int, fileType string) ([]FileAuth, []File) {
	var fileAuths []FileAuth
	var files []File

	query := DB.Where("file_auths.auth_id = ? AND file_auths.upload_type = ?", userID, fileType).
		Joins("LEFT JOIN files ON file_auths.file_id = files.id")

	if proto.Config.SERVER_SQL_LOG {
		query = query.Debug()
	}

	// 先查询 FileAuth 相关记录
	resultAuth := query.Find(&fileAuths)
	if resultAuth.Error != nil {
		log.Printf("查询文件认证列表时出错，UserID: %d, FileType: %s, 错误信息: %v", userID, fileType, resultAuth.Error)
		return nil, nil
	}

	// 如果有 FileAuth 记录，再查询对应的 File 记录
	if len(fileAuths) > 0 {
		fileIDs := make([]int, 0, len(fileAuths))
		for _, auth := range fileAuths {
			fileIDs = append(fileIDs, auth.FileID) // 假设 FileAuth 结构体中有 FileID 字段
		}
		resultFiles := DB.Where("id IN ?", fileIDs).Find(&files)
		if resultFiles.Error != nil {
			log.Printf("查询文件列表时出错，UserID: %d, FileType: %s, 错误信息: %v", userID, fileType, resultFiles.Error)
			return nil, nil
		}
	}

	return fileAuths, files
}

// 通过文件名及用户id查询(文件名模糊查询),索引不生效查询较慢
func FindFileByUserFileName(fileName string, userID int) []FileAuth {
	var files []FileAuth
	if proto.Config.SERVER_SQL_LOG {
		DB.Debug().Where("auth_id = ? and user_file_name LIKE ?", userID, "%"+fileName+"%").Find(&files)
	} else {
		DB.Where("auth_id = ? and user_file_name LIKE ?", userID, "%"+fileName+"%").Find(&files)
	}
	return files
}

// 删除文件
func DeleteFileAuthByID(id int) error {
	var res *gorm.DB
	if proto.Config.SERVER_SQL_LOG {
		res = DB.Debug().Delete(&FileAuth{}, id)
	} else {
		res = DB.Delete(&FileAuth{}, id)
	}
	return res.Error
}

// 修改文件名（暂时只能改文件名）
func UpdateFileAuthByID(id int, file FileAuth) error {
	var res *gorm.DB
	if proto.Config.SERVER_SQL_LOG {
		res = DB.Debug().Model(&FileAuth{}).Where("id = ?", id).Updates(&file)
	} else {
		res = DB.Model(&FileAuth{}).Where("id = ?", id).Updates(&file)
	}
	return res.Error
}

// 根据FileAuth的id查询
func FindFileAuthByID(id int) FileAuth {
	var file FileAuth
	if proto.Config.SERVER_SQL_LOG {
		DB.Debug().Where("id = ?", id).First(&file)
	} else {
		DB.Where("id = ?", id).First(&file)
	}
	return file
}

// 获取用户文件占用空间
type UserFileSpace struct {
	TotalSize int `gorm:"column:total_size"`
}

func GetUserFileSpace(userID int) UserFileSpace {
	var space UserFileSpace
	if proto.Config.SERVER_SQL_LOG {
		DB.Debug().Raw("SELECT SUM(file_size) as total_size FROM file_auths left join files on file_auths.file_id = files.id where file_auths.auth_id=? AND file_auths.deleted_at IS NULL", userID).Scan(&space)
	} else {
		DB.Raw("SELECT SUM(file_size) as total_size FROM file_auths left join files on file_auths.file_id = files.id where file_auths.auth_id= ? AND file_auths.deleted_at IS NULL ", userID).Scan(&space)
	}
	return space
}

func FindFileAuthByName(fileName string, userID int) FileAuth {
	var file FileAuth
	var db2 *gorm.DB
	if proto.Config.SERVER_SQL_LOG {
		db2 = DB.Debug()
	} else {
		db2 = DB
	}
	db2.Where("user_file_name = ? and auth_id = ?", fileName, userID).First(&file)
	return file
}