package middleware

import (
	"errors"
	"os"
	"strings"

	"github.com/gofiber/fiber/v2"
	"github.com/golang-jwt/jwt/v5"
	"github.com/pahmiudahgede/senggoldong/utils"
)

func RoleRequired(roles ...string) fiber.Handler {
	return func(c *fiber.Ctx) error {

		tokenString := c.Get("Authorization")
		if tokenString == "" {
			return c.Status(fiber.StatusUnauthorized).JSON(utils.FormatResponse(
				fiber.StatusUnauthorized,
				"Token is required",
				nil,
			))
		}

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

		token, err := jwt.Parse(tokenString, func(token *jwt.Token) (interface{}, error) {
			if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
				return nil, errors.New("unexpected signing method")
			}
			return []byte(os.Getenv("API_KEY")), nil
		})
		if err != nil || !token.Valid {
			return c.Status(fiber.StatusUnauthorized).JSON(utils.FormatResponse(
				fiber.StatusUnauthorized,
				"Invalid or expired token",
				nil,
			))
		}

		claims, ok := token.Claims.(jwt.MapClaims)
		if !ok {
			return c.Status(fiber.StatusUnauthorized).JSON(utils.FormatResponse(
				fiber.StatusUnauthorized,
				"Invalid token claims",
				nil,
			))
		}

		role := claims["role"].(string)

		for _, r := range roles {
			if r == role {
				return c.Next()
			}
		}

		return c.Status(fiber.StatusForbidden).JSON(utils.FormatResponse(
			fiber.StatusForbidden,
			"You do not have permission to access this resource",
			nil,
		))
	}
}

func AuthMiddleware(c *fiber.Ctx) error {
	tokenString := c.Get("Authorization")
	tokenString = strings.TrimPrefix(tokenString, "Bearer ")

	if tokenString == "" {
		return c.Status(fiber.StatusUnauthorized).JSON(fiber.Map{
			"message": "Missing or invalid token",
		})
	}

	token, err := jwt.Parse(tokenString, func(token *jwt.Token) (interface{}, error) {
		return []byte(os.Getenv("API_KEY")), nil
	})

	if err != nil || !token.Valid {
		return c.Status(fiber.StatusUnauthorized).JSON(fiber.Map{
			"message": "Invalid or expired token",
		})
	}

	claims, ok := token.Claims.(jwt.MapClaims)
	if !ok {
		return c.Status(fiber.StatusUnauthorized).JSON(fiber.Map{
			"message": "Invalid token claims",
		})
	}

	userID := claims["sub"].(string)

	c.Locals("userID", userID)

	return c.Next()
}