package templates

import (
	"context"
	"strings"
	"testing"

	"bookhoard/internal/handlers"
)

// The rendering-ownership partials must render standalone (they are
// fetched by htmx.ajax at runtime) and must never leak templ literal
// expressions into their markup.
func TestRenderingPartialsRender(t *testing.T) {
	var b strings.Builder
	col := CollectionData{ID: "c1", Name: "Test Shelf", IsSmart: false}
	books := []handlers.BookInfo{{MediaItemID: "m1", Title: "A Book", Author: "An Author"}}
	if err := CollectionBooksGrid(col, books).Render(context.Background(), &b); err != nil {
		t.Fatalf("CollectionBooksGrid: %v", err)
	}
	out := b.String()
	for _, want := range []string{"A Book", `data-media-id="m1"`, "Remove from Collection"} {
		if !strings.Contains(out, want) {
			t.Errorf("books grid missing %q", want)
		}
	}

	// Empty collection renders the empty state, not a literal loop.
	b.Reset()
	if err := CollectionBooksGrid(col, nil).Render(context.Background(), &b); err != nil {
		t.Fatalf("CollectionBooksGrid empty: %v", err)
	}
	if !strings.Contains(b.String(), "No books in this collection yet.") {
		t.Error("books grid empty state missing")
	}

	b.Reset()
	user := User{ID: "u1", Timezone: "UTC"}
	conflicts := []handlers.ConflictDetailResponse{{ID: "cf1", MediaItemTitle: "War and Peace", ConflictType: "progress"}}
	if err := ConflictsRefreshFragment(user, conflicts, 3, 1).Render(context.Background(), &b); err != nil {
		t.Fatalf("ConflictsRefreshFragment: %v", err)
	}
	out = b.String()
	for _, want := range []string{`id="conflicts-list"`, `id="stats-bar"`, "hx-swap-oob", "Resolve"} {
		if !strings.Contains(out, want) {
			t.Errorf("conflicts fragment missing %q", want)
		}
	}
}

// The unlinked-books queue banner renders only when the queue is
// non-empty (hidden-unless-needed).
func TestDashboardUnlinkedBanner(t *testing.T) {
	render := func(count int) string {
		var b strings.Builder
		err := Dashboard(User{ID: "u1"}, nil, nil, nil, "", nil, 0, nil, "", "", count).Render(context.Background(), &b)
		if err != nil {
			t.Fatalf("render: %v", err)
		}
		return b.String()
	}
	if out := render(0); strings.Contains(out, "/unlinked-books") {
		t.Error("banner rendered with empty queue")
	}
	out := render(2)
	if !strings.Contains(out, "/unlinked-books") || !strings.Contains(out, "could not be identified") {
		t.Error("banner missing with non-empty queue")
	}
}

// The unlinked-books page renders queue rows standalone.
func TestUnlinkedBooksPageRender(t *testing.T) {
	var b strings.Builder
	user := User{ID: "u1", Timezone: "UTC"}
	books := []UnlinkedBookData{{
		ProgressID:      "ub1",
		DeviceName:      "Kobo Clara",
		DeviceType:      "kobo",
		FilePath:        "/mnt/onboard/book.epub",
		SHA256:          "abc123",
		TitleFromDevice: "Some Sideloaded Book",
		LastSyncTime:    "2026-10-18 12:00",
	}}
	if err := UnlinkedBooks(user, books).Render(context.Background(), &b); err != nil {
		t.Fatalf("render: %v", err)
	}
	out := b.String()
	for _, want := range []string{"Some Sideloaded Book", "abc123", `data-progress-id="ub1"`, "searchMatches"} {
		if !strings.Contains(out, want) {
			t.Errorf("unlinked page missing %q", want)
		}
	}
}