//   Sofaraum server is the server which collects the statistics
//   for the sofaraum-heatmap application.
//   Copyright 2018 K.Langenberg and contributors. All rights reserved.
//
//   This program is free software: you can redistribute it and/or modify
//   it under the terms of the GNU General Public License as published by
//   the Free Software Foundation, either version 3 of the License, or
//   (at your option) any later version.
//
//   This program is distributed in the hope that it will be useful,
//   but WITHOUT ANY WARRANTY; without even the implied warranty of
//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//   GNU General Public License for more details.
//
//   You should have received a copy of the GNU General Public License
//   along with this program.  If not, see <https://www.gnu.org/licenses/>.

package models

import (
	"code.vikunja.io/web"
	"fmt"
	"net/http"
)

// ErrInvalidData represents a "ErrInvalidData" kind of error. Used when a struct is invalid -> validation failed.
type ErrInvalidData struct {
	Message string
}

// IsErrInvalidData checks if an error is a ErrIDCannotBeZero.
func IsErrInvalidData(err error) bool {
	_, ok := err.(ErrInvalidData)
	return ok
}

func (err ErrInvalidData) Error() string {
	return fmt.Sprintf("Struct is invalid. %s", err.Message)
}

// ErrCodeInvalidData holds the unique world-error code of this error
const ErrCodeInvalidData = 1000

// HTTPError holds the http error description
func (err ErrInvalidData) HTTPError() web.HTTPError {
	return web.HTTPError{HTTPCode: http.StatusBadRequest, Code: ErrCodeInvalidData, Message: err.Message}
}

// ValidationHTTPError is the http error when a validation fails
type ValidationHTTPError struct {
	web.HTTPError
	InvalidFields []string `json:"invalid_fields"`
}

// Error implements the Error type (so we can return it as type error)
func (err ValidationHTTPError) Error() string {
	theErr := ErrInvalidData{
		Message: err.Message,
	}
	return theErr.Error()
}

// =============
//  User Errors
// =============

// ErrUserDoesNotExist represents a "UserDoesNotExist" kind of error.
type ErrUserDoesNotExist struct {
	UserID int64
}

// IsErrUserDoesNotExist checks if an error is a ErrUserDoesNotExist.
func IsErrUserDoesNotExist(err error) bool {
	_, ok := err.(ErrUserDoesNotExist)
	return ok
}

func (err ErrUserDoesNotExist) Error() string {
	return fmt.Sprintf("User does not exist [user id: %d]", err.UserID)
}

// ErrCodeUserDoesNotExist holds the unique world-error code of this error
const ErrCodeUserDoesNotExist = 2000

// HTTPError holds the http error description
func (err ErrUserDoesNotExist) HTTPError() web.HTTPError {
	return web.HTTPError{HTTPCode: http.StatusNotFound, Code: ErrCodeUserDoesNotExist, Message: "The user does not exist."}
}

// ErrNoUsernamePassword represents a "NoUsernamePassword" kind of error.
type ErrNoUsernamePassword struct{}

// IsErrNoUsernamePassword checks if an error is a ErrNoUsernamePassword.
func IsErrNoUsernamePassword(err error) bool {
	_, ok := err.(ErrNoUsernamePassword)
	return ok
}

func (err ErrNoUsernamePassword) Error() string {
	return fmt.Sprintf("No username and password provided")
}

// ErrCodeNoUsernamePassword holds the unique world-error code of this error
const ErrCodeNoUsernamePassword = 2001

// HTTPError holds the http error description
func (err ErrNoUsernamePassword) HTTPError() web.HTTPError {
	return web.HTTPError{HTTPCode: http.StatusBadRequest, Code: ErrCodeNoUsernamePassword, Message: "Please specify a username and a password."}
}

// ErrWrongUsernameOrPassword is an error where the email was not confirmed
type ErrWrongUsernameOrPassword struct {
}

func (err ErrWrongUsernameOrPassword) Error() string {
	return fmt.Sprintf("Wrong username or password")
}

// ErrCodeWrongUsernameOrPassword holds the unique world-error code of this error
const ErrCodeWrongUsernameOrPassword = 2002

// HTTPError holds the http error description
func (err ErrWrongUsernameOrPassword) HTTPError() web.HTTPError {
	return web.HTTPError{HTTPCode: http.StatusPreconditionFailed, Code: ErrCodeWrongUsernameOrPassword, Message: "Wrong username or password."}
}

// IsErrWrongUsernameOrPassword checks if an error is a IsErrEmailNotConfirmed.
func IsErrWrongUsernameOrPassword(err error) bool {
	_, ok := err.(ErrWrongUsernameOrPassword)
	return ok
}

// ErrCouldNotGetUserID represents a "ErrCouldNotGetUserID" kind of error.
type ErrCouldNotGetUserID struct{}

// IsErrCouldNotGetUserID checks if an error is a ErrCouldNotGetUserID.
func IsErrCouldNotGetUserID(err error) bool {
	_, ok := err.(ErrCouldNotGetUserID)
	return ok
}

func (err ErrCouldNotGetUserID) Error() string {
	return fmt.Sprintf("Could not get user ID")
}

// ErrCodeCouldNotGetUserID holds the unique world-error code of this error
const ErrCodeCouldNotGetUserID = 2003

// HTTPError holds the http error description
func (err ErrCouldNotGetUserID) HTTPError() web.HTTPError {
	return web.HTTPError{HTTPCode: http.StatusBadRequest, Code: ErrCodeCouldNotGetUserID, Message: "Could not get user id."}
}