package jwt_test

import (
	"fmt"
	"time"

	"github.com/dgrijalva/jwt-go"
)

func ExampleParse(myToken string, myLookupKey func(interface{}) (interface{}, error)) {
	token, err := jwt.Parse(myToken, func(token *jwt.Token) (interface{}, error) {
		return myLookupKey(token.Header["kid"])
	})

	if err == nil && token.Valid {
		fmt.Println("Your token is valid.  I like your style.")
	} else {
		fmt.Println("This token is terrible!  I cannot accept this.")
	}
}

func ExampleNew(mySigningKey []byte) (string, error) {
	// Set some claims
	claim := jwt.MapClaim{
		"foo": "bar",
		"exp": time.Now().Add(time.Hour * 72).Unix(),
	}

	// Create the token
	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claim)

	// Sign and get the complete encoded token as a string
	tokenString, err := token.SignedString(mySigningKey)
	return tokenString, err
}

func ExampleParse_errorChecking(myToken string, myLookupKey func(interface{}) (interface{}, error)) {
	token, err := jwt.Parse(myToken, func(token *jwt.Token) (interface{}, error) {
		return myLookupKey(token.Header["kid"])
	})

	if token.Valid {
		fmt.Println("You look nice today")
	} else if ve, ok := err.(*jwt.ValidationError); ok {
		if ve.Errors&jwt.ValidationErrorMalformed != 0 {
			fmt.Println("That's not even a token")
		} else if ve.Errors&(jwt.ValidationErrorExpired|jwt.ValidationErrorNotValidYet) != 0 {
			// Token is either expired or not active yet
			fmt.Println("Timing is everything")
		} else {
			fmt.Println("Couldn't handle this token:", err)
		}
	} else {
		fmt.Println("Couldn't handle this token:", err)
	}

}