package Middleware

import (
	"larago/config"
	"net/http"
	"strings"
	"time"

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

var mySigningKey = []byte(config.EnvFunc("APP_KEYS"))

func ValidateToken() gin.HandlerFunc {

	return func(c *gin.Context) {
		tokenString := c.Request.Header.Get("Authorization")
		if tokenString == "" {
			c.JSON(http.StatusUnauthorized, gin.H{"error": "Missing token"})
			c.Abort()
			return
		}

		tokenString = strings.TrimPrefix(tokenString, "Bearer ")

		claims := &jwt.MapClaims{}
		token, err := jwt.ParseWithClaims(tokenString, claims, func(token *jwt.Token) (interface{}, error) {
			return mySigningKey, nil
		})

		if err != nil || !token.Valid {
			c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid token"})
			c.Abort()
			return
		}

		if exp, ok := (*claims)["exp"].(float64); ok {
			if time.Now().Unix() > int64(exp) {
				c.JSON(http.StatusUnauthorized, gin.H{"error": "Token has expired"})
				c.Abort()
				return
			}
		}

		c.Set("claims", claims)
		c.Next()
	}
}