/*
 * Minio Client (C) 2015 Minio, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cmd

import "fmt"

/// Collection of standard errors

// APINotImplemented - api not implemented
type APINotImplemented struct {
	API     string
	APIType string
}

func (e APINotImplemented) Error() string {
	return "`" + e.API + "` is not supported for `" + e.APIType + "`."
}

// GenericBucketError - generic bucket operations error
type GenericBucketError struct {
	Bucket string
}

// BucketDoesNotExist - bucket does not exist.
type BucketDoesNotExist GenericBucketError

func (e BucketDoesNotExist) Error() string {
	return "Bucket `" + e.Bucket + "` does not exist."
}

// BucketExists - bucket exists.
type BucketExists GenericBucketError

func (e BucketExists) Error() string {
	return "Bucket `" + e.Bucket + "` exists."
}

// BucketNameEmpty - bucket name empty (http://goo.gl/wJlzDz)
type BucketNameEmpty struct{}

func (e BucketNameEmpty) Error() string {
	return "Bucket name cannot be empty."
}

// BucketInvalid - bucket name invalid.
type BucketInvalid struct {
	Bucket string
}

func (e BucketInvalid) Error() string {
	return "Bucket name " + e.Bucket + " not valid."
}

// ObjectAlreadyExists - typed return for MethodNotAllowed
type ObjectAlreadyExists struct {
	Object string
}

func (e ObjectAlreadyExists) Error() string {
	return "Object `" + e.Object + "` already exists."
}

// ObjectAlreadyExistsAsDirectory - typed return for XMinioObjectExistsAsDirectory
type ObjectAlreadyExistsAsDirectory struct {
	Object string
}

func (e ObjectAlreadyExistsAsDirectory) Error() string {
	return "Object `" + e.Object + "` already exists as directory."
}

// ObjectOnGlacier - object is of storage class glacier.
type ObjectOnGlacier struct {
	Object string
}

func (e ObjectOnGlacier) Error() string {
	return "Object `" + e.Object + "` is on Glacier storage."
}

// BucketNameTopLevel - generic error
type BucketNameTopLevel struct{}

func (e BucketNameTopLevel) Error() string {
	return "Buckets or prefixes can only be created with `/` suffix."
}

// GenericFileError - generic file error.
type GenericFileError struct {
	Path string
}

// PathNotFound (ENOENT) - file not found.
type PathNotFound GenericFileError

func (e PathNotFound) Error() string {
	return "Requested file `" + e.Path + "` not found"
}

// PathIsNotRegular (ENOTREG) - file is not a regular file.
type PathIsNotRegular GenericFileError

func (e PathIsNotRegular) Error() string {
	return "Requested file `" + e.Path + "` is not a regular file."
}

// PathInsufficientPermission (EPERM) - permission denied.
type PathInsufficientPermission GenericFileError

func (e PathInsufficientPermission) Error() string {
	return "Insufficient permissions to access this file `" + e.Path + "`"
}

// BrokenSymlink (ENOTENT) - file has broken symlink.
type BrokenSymlink GenericFileError

func (e BrokenSymlink) Error() string {
	return "Requested file `" + e.Path + "` has broken symlink"
}

// TooManyLevelsSymlink (ELOOP) - file has too many levels of symlinks.
type TooManyLevelsSymlink GenericFileError

func (e TooManyLevelsSymlink) Error() string {
	return "Requested file `" + e.Path + "` has too many levels of symlinks"
}

// EmptyPath (EINVAL) - invalid argument.
type EmptyPath struct{}

func (e EmptyPath) Error() string {
	return "Invalid path, path cannot be empty"
}

// ObjectMissing (EINVAL) - object key missing.
type ObjectMissing struct{}

func (e ObjectMissing) Error() string {
	return "Object does not exist"
}

// UnexpectedShortWrite - write wrote less bytes than expected.
type UnexpectedShortWrite struct {
	InputSize int
	WriteSize int
}

func (e UnexpectedShortWrite) Error() string {
	msg := fmt.Sprintf("Wrote less data than requested. Expected `%d` bytes, but only wrote `%d` bytes.", e.InputSize, e.WriteSize)
	return msg
}

// UnexpectedEOF (EPIPE) - reader closed prematurely.
type UnexpectedEOF struct {
	TotalSize    int64
	TotalWritten int64
}

func (e UnexpectedEOF) Error() string {
	msg := fmt.Sprintf("Input reader closed pre-maturely. Expected `%d` bytes, but only received `%d` bytes.", e.TotalSize, e.TotalWritten)
	return msg
}

// UnexpectedExcessRead - reader wrote more data than requested.
type UnexpectedExcessRead UnexpectedEOF

func (e UnexpectedExcessRead) Error() string {
	msg := fmt.Sprintf("Received excess data on input reader. Expected only `%d` bytes, but received `%d` bytes.", e.TotalSize, e.TotalWritten)
	return msg
}

// SameFile - source and destination are same files.
type SameFile struct {
	Source, Destination string
}

func (e SameFile) Error() string {
	return fmt.Sprintf("'%s' and '%s' are the same file", e.Source, e.Destination)
}
