package web

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

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

// R-21 slice C — the operator unclaimed-appliance surface: render + bind/discard.

func seedAppliance(t *testing.T, st *store.Store, uuid, macSet string) int64 {
	t.Helper()
	// a real ed25519 host key line so the fingerprint helper has something to parse
	sshKey := "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIHVBv+9slP74+1/vNhiI0OJDrXQ2nvb8iwmIxMfUZn36 host"
	hw := `{"product":"Intel N100 mini","cpu":"Intel(R) N100","mem_kb":16150372}`
	if _, _, err := st.RegisterAppliance(uuid, macSet, sshKey, hw, "hash-"+uuid, "ABCDEF"); err != nil {
		t.Fatalf("register appliance: %v", err)
	}
	list, err := st.ListUnclaimedAppliances()
	if err != nil {
		t.Fatal(err)
	}
	for _, a := range list {
		if a.UUID == uuid && a.MACSet == macSet {
			return a.ID
		}
	}
	t.Fatal("seeded appliance not found")
	return 0
}

func renderHosts(t *testing.T, s *Server) string {
	t.Helper()
	rr := httptest.NewRecorder()
	s.handleHostsList(rr, httptest.NewRequest("GET", "/hosts", nil))
	if rr.Code != 200 {
		t.Fatalf("hosts page = %d", rr.Code)
	}
	return rr.Body.String()
}

func TestAppliances_UnclaimedSectionRenders(t *testing.T) {
	s, st := newTestServer(t)
	if err := st.SaveCustomerConfig(&store.CustomerConfig{CustomerID: "acme", CustomerName: "Acme Kft", APIKey: "k", RetrievalPassword: "pw"}); err != nil {
		t.Fatal(err)
	}
	seedAppliance(t, st, "uuid-vis", "bc:24:11:98:10:0e,bc:24:11:98:10:0f")

	html := renderHosts(t, s)
	for _, want := range []string{
		"Unclaimed appliances", "uuid-vis", "bc:24:11:98:10:0e",
		"Intel N100 mini", "SHA256:", // hw + a computed SSH fingerprint
		`action="/appliances/`, "/bind", "/discard",
		`Acme Kft (0 hosts)`, // the picker shows host counts (display only)
	} {
		if !strings.Contains(html, want) {
			t.Errorf("unclaimed section missing %q", want)
		}
	}
}

func TestAppliances_BindStagesDelivery(t *testing.T) {
	s, st := newTestServer(t)
	if err := st.SaveCustomerConfig(&store.CustomerConfig{CustomerID: "acme", CustomerName: "Acme", APIKey: "k", RetrievalPassword: "pw"}); err != nil {
		t.Fatal(err)
	}
	id := seedAppliance(t, st, "uuid-bind", "bc:24:11:98:10:0e")

	form := url.Values{"customer_id": {"acme"}, "mode": {"appliance"}, "extra_args": {"--cores 4"}}
	req := httptest.NewRequest("POST", "/appliances/x/bind", strings.NewReader(form.Encode()))
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	rr := httptest.NewRecorder()
	s.handleApplianceBind(rr, req, id)
	if rr.Code != http.StatusSeeOther {
		t.Fatalf("bind = %d (%s), want 303", rr.Code, rr.Body.String())
	}
	// The appliance is now bound with the staged delivery.
	a, _ := st.GetAppliance(id)
	if a.Status != store.ApplianceBound || a.CustomerID != "acme" || a.InstallMode != "appliance" || a.ExtraArgs != "--cores 4" {
		t.Fatalf("bind did not stage the delivery: %+v", a)
	}
	// Audit event recorded (a customer scopes it now).
	if ev, _ := st.GetLatestEventByType("acme", "appliance_bound"); ev == nil {
		t.Error("no appliance_bound event recorded")
	}
	// It leaves the unclaimed section as a bound row (still shown until delivered).
	if !strings.Contains(renderHosts(t, s), "bound → Acme") {
		t.Error("bound appliance not shown as bound in the UI")
	}
}

// Bind must NOT gate on the customer's host count (a post-RESET / drill customer is hostless).
func TestAppliances_BindDoesNotGateOnHostCount(t *testing.T) {
	s, st := newTestServer(t)
	if err := st.SaveCustomerConfig(&store.CustomerConfig{CustomerID: "hostless", APIKey: "k", RetrievalPassword: "pw"}); err != nil {
		t.Fatal(err)
	}
	id := seedAppliance(t, st, "uuid-h", "bc:24:11:98:10:0e")
	form := url.Values{"customer_id": {"hostless"}}
	req := httptest.NewRequest("POST", "/appliances/x/bind", strings.NewReader(form.Encode()))
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	rr := httptest.NewRecorder()
	s.handleApplianceBind(rr, req, id)
	if rr.Code != http.StatusSeeOther {
		t.Fatalf("bind to hostless customer = %d, want 303 (host count is display-only)", rr.Code)
	}
}

func TestAppliances_BindUnknownCustomerRejected(t *testing.T) {
	s, st := newTestServer(t)
	id := seedAppliance(t, st, "uuid-u", "bc:24:11:98:10:0e")
	form := url.Values{"customer_id": {"ghost"}}
	req := httptest.NewRequest("POST", "/appliances/x/bind", strings.NewReader(form.Encode()))
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	rr := httptest.NewRecorder()
	s.handleApplianceBind(rr, req, id)
	if rr.Code != http.StatusBadRequest {
		t.Fatalf("bind to unknown customer = %d, want 400", rr.Code)
	}
	if a, _ := st.GetAppliance(id); a.Status != store.ApplianceRegistered {
		t.Error("a rejected bind still mutated the appliance")
	}
}

func TestAppliances_Discard(t *testing.T) {
	s, st := newTestServer(t)
	id := seedAppliance(t, st, "uuid-d", "bc:24:11:98:10:0e")
	req := httptest.NewRequest("POST", "/appliances/x/discard", nil)
	rr := httptest.NewRecorder()
	s.handleApplianceDiscard(rr, req, id)
	if rr.Code != http.StatusSeeOther {
		t.Fatalf("discard = %d, want 303", rr.Code)
	}
	a, _ := st.GetAppliance(id)
	if a.Status != store.ApplianceDiscarded {
		t.Fatalf("discard did not set status: %+v", a)
	}
	// No longer in the unclaimed list.
	list, _ := st.ListUnclaimedAppliances()
	if len(list) != 0 {
		t.Errorf("discarded appliance still unclaimed: %d", len(list))
	}
}
