package middleware

import (
	"errors"
	"github.com/gin-gonic/gin"
	"log"
	"net/http"
	"strings"
)

func TokenRequired() gin.HandlerFunc {
	return func(c *gin.Context) {
		_, err := checkForTokenInContext(c)

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

		c.Next()
	}
}

func CORSMiddleware() gin.HandlerFunc {
	return func(c *gin.Context) {
		c.Writer.Header().Set("Access-Control-Allow-Origin", "*")
		c.Writer.Header().Set("Access-Control-Allow-Credentials", "true")
		c.Writer.Header().Set("Access-Control-Allow-Headers", "Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization, accept, origin, Cache-Control, X-Requested-With")
		c.Writer.Header().Set("Access-Control-Allow-Methods", "POST, OPTIONS, GET, PUT")

		if c.Request.Method == "OPTIONS" {
			log.Println(c.Request.Header)
			c.AbortWithStatus(http.StatusNoContent)
			return
		}

		c.Next()
	}
}

func checkForTokenInContext(c *gin.Context) (string, error) {
	authorizationHeader := c.GetHeader("Authorization")
	if authorizationHeader == "" {
		return "", errors.New("authorization header is missing")
	}

	parts := strings.Split(authorizationHeader, " ")

	if len(parts) != 2 || parts[0] != "Bearer" {
		return "", errors.New("invalid Authorization header format")
	}

	return parts[1], nil
}