<?php

namespace App\Livewire\Discover;

use App\Models\Site;
use App\Support\GuestPreview;
use Illuminate\Contracts\View\View;
use Illuminate\Pagination\LengthAwarePaginator;
use Livewire\Attributes\Layout;
use Livewire\Attributes\Url;
use Livewire\Component;
use Livewire\WithPagination;

/**
 * The competitor-discovery search: "who sells honey with a .es domain?" — keyword
 * matches a site's pages via MySQL fulltext (natural language mode, so free-text input
 * never trips a boolean-mode syntax error), TLD filters the site's domain suffix,
 * platform filters its detected server/powered-by/generator signature, language
 * filters by the CDX-reported ISO 639 code of a page's content (e.g. "spa", "eng").
 */
#[Layout('components.layouts.app')]
class Search extends Component
{
    use WithPagination;

    #[Url(as: 'q', history: true)]
    public string $keyword = '';

    #[Url(as: 'tld', history: true)]
    public string $tld = '';

    #[Url(as: 'platform', history: true)]
    public string $platform = '';

    #[Url(as: 'lang', history: true)]
    public string $language = '';

    public function updatingKeyword(): void
    {
        $this->resetPage();
    }

    public function updatingTld(): void
    {
        $this->resetPage();
    }

    public function updatingPlatform(): void
    {
        $this->resetPage();
    }

    public function updatingLanguage(): void
    {
        $this->resetPage();
    }

    public function render(): View
    {
        $keyword = trim($this->keyword);
        $tld = strtolower(trim(ltrim($this->tld, '.')));
        $platform = trim($this->platform);
        $language = strtolower(trim($this->language));
        $hasQuery = $keyword !== '' || $tld !== '' || $platform !== '' || $language !== '';

        // Without any filter this would just be the full site list — that's what the
        // Sites page is for. Discover only returns results once you've asked it something.
        if (! $hasQuery) {
            $sites = new LengthAwarePaginator([], 0, 25, 1, ['path' => request()->url()]);
        } else {
            $sites = GuestPreview::paginate(Site::query()
                ->when(
                    $keyword !== '',
                    fn ($query) => $query->whereHas(
                        'pages',
                        fn ($pageQuery) => $pageQuery->whereFullText(['title', 'description', 'keywords', 'content'], $keyword)
                    )
                )
                ->when($tld !== '', fn ($query) => $query->where('domain', 'like', '%.'.$tld))
                ->when($platform !== '', function ($query) use ($platform) {
                    $query->where(function ($query) use ($platform) {
                        $query->where('server', 'like', '%'.$platform.'%')
                            ->orWhere('powered_by', 'like', '%'.$platform.'%')
                            ->orWhere('generator', 'like', '%'.$platform.'%');
                    });
                })
                ->when(
                    $language !== '',
                    // languages is a comma-separated list of ISO 639 codes (e.g. "spa,eng") —
                    // FIND_IN_SET matches an exact code, not a LIKE substring match.
                    fn ($query) => $query->whereHas(
                        'pages',
                        fn ($pageQuery) => $pageQuery->whereRaw('FIND_IN_SET(?, languages)', [$language])
                    )
                )
                ->withCount(['pages as matching_pages_count' => function ($pageQuery) use ($keyword) {
                    if ($keyword !== '') {
                        $pageQuery->whereFullText(['title', 'description', 'keywords', 'content'], $keyword);
                    }
                }])
                ->orderByDesc('matching_pages_count')
                ->orderBy('domain'));
        }

        return view('livewire.discover.search', ['sites' => $sites, 'hasQuery' => $hasQuery]);
    }
}