package ratchet

import (
	"context"
	"time"
)

type User struct {
	ID int `json:"id"`

	// User prefered name and email
	Name  string `json:"name"`
	Email string `json:"email"`

	// Randomly generated API key for use with the API
	// "-" omits the key from serialization
	APIKey string `json:"-"`

	// Timestamps for user creatation and last update
	CreatedAt time.Time `json:"createdAt"`
	UpdatedAt time.Time `json:"updatedAt"`

	// List of associated Oauth authentication Objects
	// Not yet implemented
	// Auths []*Auth `json:"auths"`
}

func (u *User) Validate() error {
	if u.Name == "" {
		return Errorf(EINVALID, "User name required.")
	}
	return nil
}

// UserService represents a service for managing users.
type UserService interface {
	// Retrieves a user by ID along with their associated auth objects
	// Returns ENOTFOUND if user does not exist.
	FindUserByID(ctx context.Context, id int) (*User, error)

	// Retrieves a list of users by filter. Also returns total count of matching users
	// which may differ from retruned results if filter.Limit is specified.
	FindUsers(ctc context.Context, filter UserFilter) ([]*User, int, error)

	// Creates a new use. This is only used for testing since users are typically
	// cretaed during the OAuth creation process in the AuthService.CreateAuth().
	CreateUser(ctx context.Context, user *User) error

	// Updates a user object. Returns EUNAUTHORIZED if current user is not
	// the user that is being updated. Returns ENOTFOUND if the user does not exist.
	UpdateUser(ctx context.Context, id int, upd UserUpdate) (*User, error)

	// Permanently deletes a user and all owned application resources. Returns EUNAUTHORIZED
	// if current user is not the user being deleted. Returns ENOTFOUND if the user
	// does not exist.
	DeleteUser(ctx context.Context, id int) error
}

// UserFilter respresents a filter passed to FindUsers().
type UserFilter struct {
	ID     *int    `json:"id"`
	Email  *string `json:"email"`
	APIKey *string `json:"apiKey"`

	// Restrict to subset of results
	Offset int `json:"offset"`
	Limit  int `json:"limit"`
}

type UserUpdate struct {
	Name  *string `json:"name"`
	Email *string `json:"email"`
}