package authboss

import (
	"time"

	"golang.org/x/crypto/bcrypt"
)

// Config holds all the configuration for both authboss and it's modules.
type Config struct {
	Paths struct {
		// Mount is the path to mount authboss's routes at (eg /auth).
		Mount string

		// AuthLoginOK is the redirect path after a successful authentication.
		AuthLoginOK string
		// AuthLogoutOK is the redirect path after a log out.
		AuthLogoutOK string

		// RecoverOK is the redirect path after a successful recovery of a password.
		RecoverOK string

		// RegisterOK is the redirect path after a successful registration.
		RegisterOK string

		// RootURL is the scheme+host+port of the web application (eg https://www.happiness.com:8080) for url generation. No trailing slash.
		RootURL string
	}

	Modules struct {
		// BCryptCost is the cost of the bcrypt password hashing function.
		AuthBCryptCost int

		// AuthLogoutMethod is the method the logout route should use (default should be DELETE)
		AuthLogoutMethod string

		// ExpireAfter controls the time an account is idle before being logged out
		// by the ExpireMiddleware.
		ExpireAfter time.Duration

		// LockAfter this many tries.
		LockAfter int
		// LockWindow is the waiting time before the number of attemps are reset.
		LockWindow time.Duration
		// LockDuration is how long an account is locked for.
		LockDuration time.Duration

		// RegisterPreserveFields are fields used with registration that are to be rendered when
		// post fails.
		RegisterPreserveFields []string

		// RecoverTokenDuration controls how long a token sent via email for password
		// recovery is valid for.
		RecoverTokenDuration time.Duration

		// OAuth2Providers lists all providers that can be used. See
		// OAuthProvider documentation for more details.
		OAuth2Providers map[string]OAuth2Provider
	}

	Mail struct {
		// From is the email address authboss e-mails come from.
		From string
		// SubjectPrefix is used to add something to the front of the authboss
		// email subjects.
		SubjectPrefix string
	}

	Storage struct {
		// Storer is the interface through which Authboss accesses the web apps database
		// for user operations.
		Server ServerStorer

		// CookieState must be defined to provide an interface capapable of
		// storing cookies for the given response, and reading them from the request.
		CookieState ClientStateReadWriter
		// SessionState must be defined to provide an interface capable of
		// storing session-only values for the given response, and reading them
		// from the request.
		SessionState ClientStateReadWriter
	}

	Core struct {
		// Router is the entity that controls all routing to authboss routes
		// modules will register their routes with it.
		Router Router

		// ErrorHandler wraps http requests with centralized error handling.
		ErrorHandler ErrorHandler

		// Responder takes a generic response from a controller and prepares
		// the response, uses a renderer to create the body, and replies to the
		// http request.
		Responder HTTPResponder

		// Redirector can redirect a response, similar to Responder but responsible
		// only for redirection.
		Redirector HTTPRedirector

		// BodyReader reads validatable data from the body of a request to be able
		// to get data from the user's client.
		BodyReader BodyReader

		// ViewRenderer loads the templates for the application.
		ViewRenderer Renderer
		// MailRenderer loads the templates for mail. If this is nil, it will
		// fall back to using the Renderer created from the ViewLoader instead.
		MailRenderer Renderer

		// Mailer is the mailer being used to send e-mails out via smtp
		Mailer Mailer

		// Logger implies just a few log levels for use, can optionally
		// also implement the ContextLogger to be able to upgrade to a
		// request specific logger.
		Logger Logger
	}
}

// Defaults sets the configuration's default values.
func (c *Config) Defaults() {
	c.Paths.Mount = "/"
	c.Paths.RootURL = "http://localhost:8080"
	c.Paths.AuthLoginOK = "/"
	c.Paths.AuthLogoutOK = "/"
	c.Paths.RecoverOK = "/"
	c.Paths.RegisterOK = "/"

	c.Modules.AuthBCryptCost = bcrypt.DefaultCost
	c.Modules.AuthLogoutMethod = "DELETE"
	c.Modules.ExpireAfter = 60 * time.Minute
	c.Modules.LockAfter = 3
	c.Modules.LockWindow = 5 * time.Minute
	c.Modules.LockDuration = 5 * time.Hour
	c.Modules.RecoverTokenDuration = time.Duration(24) * time.Hour
}