package handlers

import (
	"context"
	"fmt"
	"gitee.com/guuzaa/microservices/product-api/data"
	"net/http"
)

// MiddlewareValidateProduct validates the product in the request and calls next if ok
func (p Products) MiddlewareValidateProduct(next http.Handler) http.Handler {
	return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
		rw.Header().Add("Content-Type", "application/json")

		prod := &data.Product{}

		if err := data.FromJSON(prod, r.Body); err != nil {
			p.l.Println("[ERROR] deserializing product", err)
			http.Error(rw, "Error reading product", http.StatusBadRequest)
			return
		}

		//validate the product
		if err := p.v.Validate(prod); len(err) != 0 {
			p.l.Println("[ERROR] validating product", err)
			http.Error(
				rw,
				fmt.Sprintf("Error validating product: %s", err),
				http.StatusBadRequest)
			return

		}

		// add the product to the context
		ctx := context.WithValue(r.Context(), KeyProduct{}, prod)
		r = r.WithContext(ctx)
		// Call the next handler, which can be another middleware in the chain, or the final handler.
		next.ServeHTTP(rw, r)
	})
}