package handler

import (
	"bytes"
	"encoding/json"
	"fmt"
	"io"
	"net/http"
)

func (h *Handler) Fallback(w http.ResponseWriter, r *http.Request) {
	h.Logger.Debug("Fallback Request received", "method", r.Method, "url", r.URL, "path", r.URL.Path, "query", r.URL.Query(), "proto", r.Proto)

	// Print headers
	for name, values := range r.Header {
		for _, value := range values {
			h.Logger.Debug("Header ", "name", name, "value", value)
		}
	}

	// print query
	for key, values := range r.URL.Query() {
		for _, value := range values {
			h.Logger.Debug("Query Paramater", "key", key, "value", value)
		}
	}

	body, err := io.ReadAll(r.Body)
	if err != nil {
		http.Error(w, "Unable to read body", http.StatusBadRequest)
		return
	}
	defer r.Body.Close()

	// Pretty-print JSON to console
	var prettyJSON bytes.Buffer
	if err := json.Indent(&prettyJSON, body, "", "  "); err != nil {
		w.Header().Set("Content-Type", "application/json")
		// always send 200 just so that the requestor doesn't error out
		w.WriteHeader(http.StatusOK)
		json.NewEncoder(w).Encode(map[string]string{
			"status":  "ERROR",
			"message": fmt.Sprintf("Invalid JSON received. Visit /about for more info."),
		})
		return
	}

	h.Logger.Debug("Received JSON payload", "payload", prettyJSON.String())
	//fmt.Println("Received JSON payload:")
	//fmt.Println(prettyJSON.String())

	// Set content type and write back the same JSON
	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(http.StatusOK)
	w.Write(prettyJSON.Bytes())
}