package httpapi

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

	"github.com/alexedwards/scs/v2"
	"github.com/descrybe/descrybe-v2/apps/api/internal/auth"
	"github.com/descrybe/descrybe-v2/apps/api/internal/config"
	"github.com/google/uuid"
)

func TestHandleAdminReadinessNilPool(t *testing.T) {
	t.Parallel()
	s := &Server{}
	req := httptest.NewRequest(http.MethodGet, "/api/admin/readiness", nil)
	rec := httptest.NewRecorder()
	s.handleAdminReadiness(rec, req)
	if rec.Code != http.StatusServiceUnavailable {
		t.Fatalf("status=%d want 503 body=%s", rec.Code, rec.Body.String())
	}
}

// TestRouterAdminReadinessMounted locks the P1-15 SPA contract: after session +
// platform-admin gates, GET /api/admin/readiness must reach the handler (503 with
// nil pool), not chi 404. Unauthed probes alone cannot prove the mount — any
// /api/admin/* returns 401 from RequireSession whether or not /readiness exists.
func TestRouterAdminReadinessMounted(t *testing.T) {
	t.Parallel()
	sm := scs.New()
	sm.Cookie.Name = "descrybe_session"
	uid := uuid.MustParse("aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa")
	s := &Server{
		Config: config.Config{
			CSRFCookieName: "descrybe_csrf",
			WebOrigin:      "http://localhost:5173",
		},
		Sessions: sm,
		Auth:     &auth.Service{},
		testPlatformAdmin: func(_ context.Context, got uuid.UUID) (bool, error) {
			return got == uid, nil
		},
	}

	var token string
	seed := LoadSession(sm)(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		sm.Put(r.Context(), auth.SessionUserIDKey, uid.String())
		w.WriteHeader(http.StatusNoContent)
	}))
	seedRec := httptest.NewRecorder()
	seed.ServeHTTP(seedRec, httptest.NewRequest(http.MethodGet, "/seed", nil))
	for _, c := range seedRec.Result().Cookies() {
		if c.Name == sm.Cookie.Name {
			token = c.Value
		}
	}
	if token == "" {
		t.Fatal("expected session cookie from seed request")
	}

	h := s.Router()

	unauth := httptest.NewRecorder()
	h.ServeHTTP(unauth, httptest.NewRequest(http.MethodGet, "/api/admin/readiness", nil))
	if unauth.Code != http.StatusUnauthorized {
		t.Fatalf("unauth status=%d want 401 body=%s", unauth.Code, unauth.Body.String())
	}

	mounted := httptest.NewRecorder()
	req := httptest.NewRequest(http.MethodGet, "/api/admin/readiness", nil)
	req.AddCookie(&http.Cookie{Name: sm.Cookie.Name, Value: token})
	h.ServeHTTP(mounted, req)
	if mounted.Code == http.StatusNotFound {
		t.Fatalf("readiness not mounted: status=404 body=%s", mounted.Body.String())
	}
	if mounted.Code != http.StatusServiceUnavailable {
		t.Fatalf("mounted status=%d want 503 (nil pool) body=%s", mounted.Code, mounted.Body.String())
	}

	missing := httptest.NewRecorder()
	missReq := httptest.NewRequest(http.MethodGet, "/api/admin/does-not-exist", nil)
	missReq.AddCookie(&http.Cookie{Name: sm.Cookie.Name, Value: token})
	h.ServeHTTP(missing, missReq)
	if missing.Code != http.StatusNotFound {
		t.Fatalf("unknown admin path status=%d want 404 body=%s", missing.Code, missing.Body.String())
	}
}