package libs

import (
	"errors"
	"github.com/gin-gonic/gin"
	"github.com/go-playground/validator/v10"
	"golang-test/types"
	"net/http"
	"strings"
)

type ValidationErrorsType struct {
	Errors map[string]string `json:"errors"`
}

func GetValidationErrors(errs validator.ValidationErrors) ValidationErrorsType {
	errors := make(map[string]string)
	for _, err := range errs {
		errors[err.Field()] = err.Error()
	}

	return ValidationErrorsType{Errors: errors}
}

func ToSnakeCase(str string) string {
	var result []rune
	for i, r := range str {
		if i > 0 && 'A' <= r && r <= 'Z' {
			result = append(result, '_')
		}
		result = append(result, r)
	}
	return strings.ToLower(string(result))
}

func GetTokenFromHeaders(c *gin.Context) (string, error) {
	if c.Request.Header["Authorization"] == nil {
		return "", errors.New("Authorization required")
	}

	if len(strings.Split(c.Request.Header["Authorization"][0], " ")) < 2 {
		c.JSON(http.StatusUnauthorized, types.ErrorResponse{Message: "Invalid token. Please login"})
		return "", errors.New("Authorization required")
	}
	token := strings.Split(c.Request.Header["Authorization"][0], " ")[1]

	return token, nil
}