package web

import (
	"context"
	"net"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"

	"gitea.dooplex.hu/admin/felhom-controller/internal/mediawire"
)

// fakePlex answers as Plex does (measured on demo-hp 9201, 2026-10-15): a Host that is not an address is „non-local",
// so the claim gets 401; by address the claim is taken (200 here — the real one asks plex.tv). The test client dials
// this server whatever the URL names, so the only difference between the two calls is the Host header.
func fakePlex(t *testing.T) (hosts *[]string) {
	t.Helper()
	var seen []string
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		seen = append(seen, r.Host)
		h, _, err := net.SplitHostPort(r.Host)
		if err != nil {
			h = r.Host
		}
		local := net.ParseIP(h) != nil
		switch r.URL.Path {
		case "/myplex/claim":
			if !local {
				w.WriteHeader(http.StatusUnauthorized)
				return
			}
			w.WriteHeader(http.StatusOK)
		case "/identity":
			w.Header().Set("Content-Type", "application/json")
			_, _ = w.Write([]byte(`{"MediaContainer":{"claimed":` + map[bool]string{true: "true", false: "false"}[local] + `}}`))
		default:
			w.WriteHeader(http.StatusNotFound)
		}
	}))
	t.Cleanup(srv.Close)
	oldHTTP, oldLookup := plexHTTP, mediawire.PlexLookup
	plexHTTP = &http.Client{Transport: &http.Transport{DialContext: func(ctx context.Context, network, _ string) (net.Conn, error) {
		return (&net.Dialer{}).DialContext(ctx, network, srv.Listener.Addr().String())
	}}}
	mediawire.PlexLookup = func(context.Context) ([]net.IPAddr, error) { return []net.IPAddr{{IP: net.ParseIP("10.9.8.7")}}, nil }
	t.Cleanup(func() { plexHTTP, mediawire.PlexLookup = oldHTTP, oldLookup })
	return &seen
}

// R-1060 — the household's claim reaches Plex BY ADDRESS, so Plex takes it as local; the identity call too.
// COMPANION RED-PROOF: make mediawire.PlexURL return "http://plex:<port>" (today's call) → 401 and this fails.
func TestR1060_TheClaimReachesPlexByAddress(t *testing.T) {
	hosts := fakePlex(t)
	code, err := plexClaim("claim-felhomtestcode0000")
	if err != nil || code != http.StatusOK {
		t.Fatalf("claim → %d (%v); Plex refuses the name „plex” as non-local — the box must call it by address", code, err)
	}
	if !plexClaimed() {
		t.Fatal("the identity call did not reach Plex as local")
	}
	for _, h := range *hosts {
		if !strings.HasPrefix(h, "10.9.8.7:") {
			t.Errorf("a call to Plex carried Host %q, not its address", h)
		}
	}
}