package web

import (
	"bytes"
	"log"
	"net/http"
	"net/http/httptest"
	"net/url"
	"regexp"
	"strings"
	"testing"

	"gitea.dooplex.hu/admin/felhom-hub/internal/store"
)

// Agent-only vouch (`09` §3 decision 250 items 3–4, hub v0.158.0). The golden is baked weekly while the floor carries
// controller releases, so mid-week the vouched golden is behind the fleet. The R-120 gate guards a golden SELECTION:
// an unchanged golden (same version, same sha) is not a selection and must not block an agent-only save; a changed
// golden is judged exactly as before. Both tests drive handleSetArtifacts — the only UI writer of the manifest.

func postArtifacts(t *testing.T, s *Server, form url.Values) *httptest.ResponseRecorder {
	t.Helper()
	r := httptest.NewRequest(http.MethodPost, "/configuration/artifacts", strings.NewReader(form.Encode()))
	r.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	w := httptest.NewRecorder()
	s.handleSetArtifacts(w, r)
	return w
}

// The mid-week situation: golden 0.330.0 vouched on Sunday, the floor has since carried the fleet to 0.335.0, and the
// operator vouches a new agent. RED-PROOF (REPORT, 2026-10-17 night): with the `!goldenUnchanged` condition removed
// from the gate, this fails: `agent-only vouch refused: Location="/configuration?flash=golden_behind_fleet"`.
func TestVouchAgentOnlyWithStaleGoldenIsSaved(t *testing.T) {
	s, st := newTestServer(t)
	seedReport(t, st, "demo", "0.335.0")
	golden := strings.Repeat("b", 64)
	if err := st.SetArtifactManifest(store.ArtifactManifest{
		AgentVersion: "0.159.0", AgentSHA256: strings.Repeat("a", 64),
		GoldenVersion: "0.330.0", GoldenSHA256: golden, MinAgent: "0.150.0",
	}); err != nil {
		t.Fatal(err)
	}
	w := postArtifacts(t, s, url.Values{
		"agent_version": {"0.160.0"}, "agent_sha256": {strings.Repeat("c", 64)},
		"golden_version": {"0.330.0"}, "golden_sha256": {golden}, "min_agent": {"0.150.0"},
	})
	if loc := w.Header().Get("Location"); !strings.Contains(loc, "flash=artifacts_set") {
		t.Fatalf("agent-only vouch refused: Location=%q, want flash=artifacts_set", loc)
	}
	m := st.GetArtifactManifest()
	if m.AgentVersion != "0.160.0" || m.AgentSHA256 != strings.Repeat("c", 64) {
		t.Fatalf("agent not saved: agent=%s sha=%s…", m.AgentVersion, m.AgentSHA256[:4])
	}
	if m.GoldenVersion != "0.330.0" || m.GoldenSHA256 != golden || m.MinAgent != "0.150.0" {
		t.Fatalf("golden/MinAgent moved on an agent-only save: %+v", m)
	}
}

// A golden CHANGED to an older one is still refused, even though the agent changes in the same save — and nothing is
// written. Also the same version under a different sha (a re-push) is a changed golden.
func TestVouchGoldenChangedToOlderIsStillRefused(t *testing.T) {
	s, st := newTestServer(t)
	seedReport(t, st, "demo", "0.335.0")
	cur := store.ArtifactManifest{
		AgentVersion: "0.159.0", AgentSHA256: strings.Repeat("a", 64),
		GoldenVersion: "0.330.0", GoldenSHA256: strings.Repeat("b", 64),
	}
	if err := st.SetArtifactManifest(cur); err != nil {
		t.Fatal(err)
	}
	for name, form := range map[string]url.Values{
		"older version": {"agent_version": {"0.160.0"}, "agent_sha256": {strings.Repeat("c", 64)},
			"golden_version": {"0.329.0"}, "golden_sha256": {strings.Repeat("d", 64)}},
		"same version, other sha": {"agent_version": {"0.160.0"}, "agent_sha256": {strings.Repeat("c", 64)},
			"golden_version": {"0.330.0"}, "golden_sha256": {strings.Repeat("e", 64)}},
	} {
		w := postArtifacts(t, s, form)
		if loc := w.Header().Get("Location"); !strings.Contains(loc, "golden_behind_fleet") {
			t.Errorf("%s: Location=%q, want the golden_behind_fleet refusal", name, loc)
		}
		if m := st.GetArtifactManifest(); m != cur {
			t.Errorf("%s: refused but the manifest changed: %+v", name, m)
		}
	}
}

// R-1346: a vouch save names the time of each leg in one line, so the next slow save says where its time went.
// RED-PROOF: drop the timing line → FAILS.
func TestVouchSaveLogsItsTiming(t *testing.T) {
	s, st := newTestServer(t)
	var logs bytes.Buffer
	s.logger = log.New(&logs, "", 0)
	seedReport(t, st, "demo", "0.335.0")
	w := postArtifacts(t, s, url.Values{"agent_version": {"0.160.0"}, "agent_sha256": {strings.Repeat("c", 64)}})
	if loc := w.Header().Get("Location"); !strings.Contains(loc, "flash=artifacts_set") {
		t.Fatalf("vouch refused: %q", loc)
	}
	if !regexp.MustCompile(`artifact vouch timing \(R-1346\): registry probes \d+ms, sha lookups \d+ms, bundle sha \d+ms, fleet check \+ save \d+ms, total \d+ms`).MatchString(logs.String()) {
		t.Fatalf("no timing line:\n%s", logs.String())
	}
}