path: root/internal/web/server_test.go

package web

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

	"github.com/lukaszkasprzak/lectio/internal/config"
	"github.com/lukaszkasprzak/lectio/internal/liturgy"
)

// TestServer exercises NewServer's handler tree end to end via httptest,
// against the same fixture HTML/hook internal/readings uses (see
// readings_test.go TestLoadModernRoutes): no real network, no real browser.
func TestServer(t *testing.T) {
	html, err := os.ReadFile("../liturgy/testdata/2026-07-22.html")
	if err != nil {
		t.Fatal(err)
	}
	fixtureServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.Write(html)
	}))
	defer fixtureServer.Close()
	liturgy.SetBaseURL(fixtureServer.URL + "/liturgia/%s/Ewangelia")
	t.Setenv("XDG_CACHE_HOME", t.TempDir())

	srv := NewServer(config.Default())

	t.Run("index page", func(t *testing.T) {
		rec := httptest.NewRecorder()
		srv.ServeHTTP(rec, httptest.NewRequest("GET", "/?date=2026-07-22&v=wuj", nil))
		if rec.Code != http.StatusOK {
			t.Fatalf("status = %d, want 200", rec.Code)
		}
		body := rec.Body.String()
		if !strings.Contains(body, "Ewangelia") {
			t.Errorf("body missing reading heading: %q", body)
		}
		if !strings.Contains(body, "htmx") {
			t.Errorf("body missing htmx reference")
		}
		if !strings.Contains(body, `id="theme"`) {
			t.Errorf("body missing theme <link>")
		}
	})

	t.Run("readings partial", func(t *testing.T) {
		rec := httptest.NewRecorder()
		srv.ServeHTTP(rec, httptest.NewRequest("GET", "/readings?date=2026-07-22&v=wuj&all=1", nil))
		if rec.Code != http.StatusOK {
			t.Fatalf("status = %d, want 200", rec.Code)
		}
		body := rec.Body.String()
		if strings.Contains(body, "<html") {
			t.Errorf("partial is not a fragment: %q", body)
		}
		if !strings.Contains(body, "Ewangelia") {
			t.Errorf("partial missing reading heading: %q", body)
		}
	})

	t.Run("lookup", func(t *testing.T) {
		rec := httptest.NewRecorder()
		srv.ServeHTTP(rec, httptest.NewRequest("GET", "/lookup?ref=J+20:1&v=wuj", nil))
		if rec.Code != http.StatusOK {
			t.Fatalf("status = %d, want 200", rec.Code)
		}
		if !strings.Contains(rec.Body.String(), "20:1") {
			t.Errorf("lookup result missing verse: %q", rec.Body.String())
		}
	})

	t.Run("theme.css", func(t *testing.T) {
		rec := httptest.NewRecorder()
		srv.ServeHTTP(rec, httptest.NewRequest("GET", "/theme.css?name=benedictines", nil))
		if rec.Code != http.StatusOK {
			t.Fatalf("status = %d, want 200", rec.Code)
		}
		if !strings.Contains(rec.Header().Get("Content-Type"), "css") {
			t.Errorf("Content-Type = %q, want it to contain css", rec.Header().Get("Content-Type"))
		}
	})

	t.Run("static", func(t *testing.T) {
		rec := httptest.NewRecorder()
		srv.ServeHTTP(rec, httptest.NewRequest("GET", "/static/htmx.min.js", nil))
		if rec.Code != http.StatusOK {
			t.Fatalf("status = %d, want 200", rec.Code)
		}
		if rec.Body.Len() == 0 {
			t.Error("static/htmx.min.js served empty body")
		}
	})

	t.Run("theme.css unknown falls back", func(t *testing.T) {
		rec := httptest.NewRecorder()
		srv.ServeHTTP(rec, httptest.NewRequest("GET", "/theme.css?name=does-not-exist", nil))
		if rec.Code != http.StatusOK {
			t.Fatalf("status = %d, want 200 (fallback to cfg.WebTheme/default)", rec.Code)
		}
		if rec.Body.Len() == 0 {
			t.Error("theme.css fallback served empty body")
		}
	})

	t.Run("readings partial interlinear", func(t *testing.T) {
		rec := httptest.NewRecorder()
		srv.ServeHTTP(rec, httptest.NewRequest("GET", "/readings?date=2026-07-22&v=wuj&v=vul&display=interlinear", nil))
		if rec.Code != http.StatusOK {
			t.Fatalf("status = %d, want 200", rec.Code)
		}
		body := rec.Body.String()
		if strings.Contains(body, "<html") {
			t.Errorf("partial is not a fragment: %q", body)
		}
		i := strings.Index(body, `class="vnum"`)
		if i == -1 {
			t.Fatalf("interlinear partial missing a vnum verse label: %q", body)
		}
		// Bound the first ilverse block by the next vnum span (each ilverse
		// carries exactly one), so the check covers every version's line
		// grouped under that one key, not just the first.
		block := body[i:]
		if j := strings.Index(body[i+1:], `class="vnum"`); j != -1 {
			block = body[i : i+1+j]
		}
		if !strings.Contains(block, "Wujek") || !strings.Contains(block, "Wulgata") {
			t.Errorf("interlinear verse block missing both version labels grouped together: %q", block)
		}
	})

	t.Run("readings partial vertical", func(t *testing.T) {
		rec := httptest.NewRecorder()
		srv.ServeHTTP(rec, httptest.NewRequest("GET", "/readings?date=2026-07-22&v=wuj&v=vul&display=vertical", nil))
		if rec.Code != http.StatusOK {
			t.Fatalf("status = %d, want 200", rec.Code)
		}
		if !strings.Contains(rec.Body.String(), "display-vertical") {
			t.Errorf("vertical partial missing display-vertical: %q", rec.Body.String())
		}
	})

	t.Run("readings partial interlinear substitutes pl", func(t *testing.T) {
		rec := httptest.NewRecorder()
		srv.ServeHTTP(rec, httptest.NewRequest("GET", "/readings?date=2026-07-22&v=pl&display=interlinear", nil))
		if rec.Code != http.StatusOK {
			t.Fatalf("status = %d, want 200", rec.Code)
		}
		body := rec.Body.String()
		if !strings.Contains(body, "Wujek") {
			t.Errorf("pl should be substituted with wuj in interlinear mode: %q", body)
		}
		if strings.Contains(body, "Polski (niedziela.pl)") {
			t.Errorf("pl paragraph column should not appear in interlinear mode: %q", body)
		}
	})

	t.Run("readings partial bad display falls back to horizontal", func(t *testing.T) {
		rec := httptest.NewRecorder()
		srv.ServeHTTP(rec, httptest.NewRequest("GET", "/readings?date=2026-07-22&v=wuj&display=bogus", nil))
		if rec.Code != http.StatusOK {
			t.Fatalf("status = %d, want 200", rec.Code)
		}
		body := rec.Body.String()
		if strings.Contains(body, "display-vertical") || strings.Contains(body, "ilverse") {
			t.Errorf("bad display should fall back to horizontal, got: %q", body)
		}
	})

	t.Run("index page seeds lookup results from ?ref=", func(t *testing.T) {
		rec := httptest.NewRecorder()
		srv.ServeHTTP(rec, httptest.NewRequest("GET", "/?ref=J+20:1&v=wuj", nil))
		if rec.Code != http.StatusOK {
			t.Fatalf("status = %d, want 200", rec.Code)
		}
		body := rec.Body.String()
		if !strings.Contains(body, `id="lookup-results"`) {
			t.Fatalf("body missing lookup-results container: %q", body)
		}
		i := strings.Index(body, `id="lookup-results"`)
		if !strings.Contains(body[i:], "20:1") {
			t.Errorf("lookup-results not populated from ?ref=: %q", body[i:min(i+400, len(body))])
		}
	})

	t.Run("index page seeds display select from cfg", func(t *testing.T) {
		rec := httptest.NewRecorder()
		srv.ServeHTTP(rec, httptest.NewRequest("GET", "/?date=2026-07-22&v=wuj", nil))
		if rec.Code != http.StatusOK {
			t.Fatalf("status = %d, want 200", rec.Code)
		}
		if !strings.Contains(rec.Body.String(), `name="display"`) {
			t.Errorf("body missing display select: %q", rec.Body.String())
		}
	})
}

// TestChooseListener exercises chooseListener's port-selection logic
// directly (no HTTP serving): port==0 prefers defaultWebPort (1099) and
// falls back to a free OS port when 1099 is taken, and a non-zero port is
// bound exactly. Sandboxed/CI environments may not permit binding 1099 (or
// may race another process for it), so those assertions t.Skip rather than
// fail the suite.
func TestChooseListener(t *testing.T) {
	t.Run("zero port returns a listener with a non-zero port", func(t *testing.T) {
		ln, err := chooseListener(0)
		if err != nil {
			t.Fatalf("chooseListener(0) error: %v", err)
		}
		defer ln.Close()
		port := ln.Addr().(*net.TCPAddr).Port
		if port == 0 {
			t.Errorf("chooseListener(0) returned port 0, want non-zero")
		}
	})

	t.Run("falls back to a free port when 1099 is taken", func(t *testing.T) {
		pre, err := net.Listen("tcp", ":1099")
		if err != nil {
			t.Skipf("cannot bind :1099 in this environment, skipping fallback assertion: %v", err)
		}
		defer pre.Close()

		ln, err := chooseListener(0)
		if err != nil {
			t.Fatalf("chooseListener(0) error while 1099 is taken: %v", err)
		}
		defer ln.Close()
		port := ln.Addr().(*net.TCPAddr).Port
		if port == 1099 {
			t.Errorf("chooseListener(0) returned 1099 even though it was already taken")
		}
	})

	t.Run("explicit non-zero port is bound exactly", func(t *testing.T) {
		probe, err := net.Listen("tcp", ":0")
		if err != nil {
			t.Skipf("cannot bind :0 to pick a free port in this environment: %v", err)
		}
		want := probe.Addr().(*net.TCPAddr).Port
		probe.Close()

		ln, err := chooseListener(want)
		if err != nil {
			t.Skipf("could not bind explicit port %d (likely a race with another process): %v", want, err)
		}
		defer ln.Close()
		got := ln.Addr().(*net.TCPAddr).Port
		if got != want {
			t.Errorf("chooseListener(%d) bound port %d, want exactly %d", want, got, want)
		}
	})
}