<?php

declare(strict_types=1);

namespace App\Controllers;

use App\Models\GameModel;
use App\Models\StoreModel;
use App\Libraries\Mongo;

class Home extends BaseController
{
    /**
     * Deal presets (mirrors gg.deals /deals/{preset}/ URLs).
     */
    private const PRESETS = [
        'hot-new-deals'   => ['title' => 'Hot New Deals',   'sort' => 'hot',   'preset' => 'hot_new'],
        'new-deals'       => ['title' => 'New Deals',       'sort' => 'recent', 'preset' => 'new'],
        'historical-lows' => ['title' => 'Historical Lows', 'sort' => 'rating', 'preset' => 'hl'],
        'ending-soon'     => ['title' => 'Ending Soon',     'sort' => 'ending', 'preset' => 'ending'],
        'at-least-75-off' => ['title' => 'At least 75% off', 'sort' => 'cut',   'preset' => 'cut75'],
        'at-least-85-off' => ['title' => 'At least 85% off', 'sort' => 'cut',   'preset' => 'cut85'],
    ];

    public function index(): string
    {
        $request = service('request');

        // If any filter/search is active → regular deal feed. Otherwise → homepage dashboard.
        $hasFilters = $request->getGet('stores') !== null || $request->getGet('kind') !== null
            || $request->getGet('min_price') !== null || $request->getGet('max_price') !== null
            || $request->getGet('min_cut') !== null || $request->getGet('hl_only') !== null
            || $request->getGet('sort') !== null || $request->getGet('price_tier') !== null
            || $request->getGet('discount_tier') !== null || $request->getGet('deal_rating') !== null
            || $request->getGet('release_range') !== null || $request->getGet('q') !== null;

        if (! $hasFilters) {
            return $this->dashboard();
        }

        return $this->renderFeed([]);
    }

    /**
     * Plain deal feed (used by /deals) regardless of filters.
     */
    public function feedOnly(): string
    {
        return $this->renderFeed([]);
    }

    /**
     * Homepage dashboard mirroring gg.deals: multiple preset sections.
     */
    private function dashboard(): string
    {
        $model = new GameModel();

        $data = [
            'pageTitle'    => 'GG.deals — Best game deals, prices &amp; discounts',
            'popular'      => $model->dashboardDeals('best', 8),
            'newDeals'     => $model->dashboardDeals('new', 8),
            'bestDeals'    => $model->dashboardDeals('hot', 8),
            'histLows'     => $model->dashboardDeals('hl', 8),
            'endingSoon'   => $model->dashboardDeals('ending', 8),
            'mostWanted'   => $model->dashboardGames('wanted', 8),
            'newReleases'  => $model->dashboardGames('releases', 8),
            'upcoming'     => $model->dashboardGames('upcoming', 8),
            'news'         => $model->recentNews(6),
            'prepaids'     => Mongo::collection('prepaids')->find([], ['sort' => ['name' => 1], 'limit' => 8])->toArray(),
            'stats'        => $model->stats(),
            'stores'       => (new StoreModel())->map(),
            'trending'     => $model->trending(12),
        ];

        return view('homepage', $data);
    }

    public function preset(string $name): string
    {
        if (! isset(self::PRESETS[$name])) {
            throw \CodeIgniter\Exceptions\PageNotFoundException::forPageNotFound();
        }

        return $this->renderFeed(self::PRESETS[$name]);
    }

    private function renderFeed(array $preset): string
    {
        $request = service('request');

        $filters = [
            'stores'    => array_values(array_filter(array_map('strval', (array) $request->getGet('stores')))),
            'kind'      => (string) ($request->getGet('kind') ?? ''),
            'min_price' => $request->getGet('min_price') !== null ? (string) $request->getGet('min_price') : '',
            'max_price' => $request->getGet('max_price') !== null ? (string) $request->getGet('max_price') : '',
            'min_cut'   => (int) ($request->getGet('min_cut') ?? 0),
            'hl_only'   => (bool) $request->getGet('hl_only'),
            'sort'      => (string) ($request->getGet('sort') ?? ($preset['sort'] ?? 'trending')),
            'q'         => trim((string) ($request->getGet('q') ?? '')),
            'price_tier'=> (string) ($request->getGet('price_tier') ?? ''),
            'discount_tier' => (string) ($request->getGet('discount_tier') ?? ''),
            'deal_rating'   => (string) ($request->getGet('deal_rating') ?? ''),
            'release_range' => (string) ($request->getGet('release_range') ?? ''),
            'time_range'    => (string) ($request->getGet('time_range') ?? ''),
            'view'      => (string) ($request->getGet('view') ?? 'sidebar'),
            'wishlist'  => array_values(array_filter(array_map('strval', (array) $request->getGet('wishlist')))),
        ];

        $filters['preset'] = $preset['preset'] ?? '';
        $filters['preset_name'] = $preset['title'] ?? '';

        $page    = max(1, (int) $request->getGet('page'));
        $perPage = 20;

        $model = new GameModel();
        $feed  = $model->feed($filters, $page, $perPage);

        $data = [
            'pageTitle' => ($filters['preset_name'] !== '' ? $filters['preset_name'] . ' — ' : '') . 'Best PC game deals — GG.deals',
            'filters'   => $filters,
            'feed'      => $feed['rows'],
            'total'     => $feed['total'],
            'pages'     => $feed['pages'],
            'page'      => $page,
            'perPage'   => $perPage,
            'trending'  => $model->trending(12),
            'stores'    => (new StoreModel())->all(),
            'stats'     => $model->stats(),
            'presets'   => self::PRESETS,
            'activePreset' => $filters['preset_name'],
        ];

        return view('home', $data);
    }
}