package web_test

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

	"github.com/stretchr/testify/require"
)

// page renders any GET path's full HTML (helper for theme/structure assertions).
func page(t *testing.T, app interface {
	Router() http.Handler
}, path string) string {
	t.Helper()
	rec := httptest.NewRecorder()
	app.Router().ServeHTTP(rec, httptest.NewRequest(http.MethodGet, path, nil))
	return rec.Body.String()
}

// TestThemeHasLightAndDarkPalettes: one layout, two palettes via CSS variables —
// a root light palette and a data-theme="dark" dark palette (ADR-032).
func TestThemeHasLightAndDarkPalettes(t *testing.T) {
	app := newApp(t)
	resetDB(t, rawPool(t))
	html := page(t, app, "/welcome") // public, no DB needed
	require.Contains(t, html, ":root", "light palette on the root")
	require.Contains(t, html, `[data-theme="dark"]`, "explicit dark palette override for the toggle")
}

// TestThemeFollowsOSPreference: with no stored choice, the OS preference applies
// the dark palette automatically.
func TestThemeFollowsOSPreference(t *testing.T) {
	app := newApp(t)
	html := page(t, app, "/welcome")
	require.Contains(t, html, "prefers-color-scheme: dark", "OS-preference dark default")
}

// TestThemeTogglePersists: every page carries a theme toggle control and a small
// script that flips data-theme and persists the choice.
func TestThemeTogglePersists(t *testing.T) {
	app := newApp(t)
	html := page(t, app, "/welcome")
	require.Contains(t, html, "theme-toggle", "a theme toggle control")
	require.Contains(t, html, "localStorage", "the choice is persisted")
	require.Contains(t, html, "data-theme", "the toggle flips data-theme")
}

// TestExpandedCardEmbedsVideo: expanding a summarized card with a valid provider id
// includes the embedded video player (ADR-031/032).
func TestExpandedCardEmbedsVideo(t *testing.T) {
	ctx := context.Background()
	app := newApp(t)
	p := rawPool(t)
	resetDB(t, p)
	require.NoError(t, deliver(ctx, app, videoX, "summary text"))
	seedVideo(t, p, videoX, "X Title", "https://x", time.Time{})

	html := body(t, do(t, app, httptest.NewRequest(http.MethodGet, "/v/"+videoX+"/expand", nil)))
	require.Contains(t, html, "<iframe", "expanded card embeds a player")
	require.True(t, strings.Contains(html, "youtube.com/embed") || strings.Contains(html, "youtube-nocookie.com/embed"),
		"the embed is the YouTube player")
}