<?php

namespace App\Http\Controllers;

use App\Models\Page;
use App\Models\Setting;
use App\Models\HeaderTemplate;
use App\Models\FooterTemplate;
use App\Services\TemplateService;
use App\Support\PageStructuredData;
use App\Support\PageTemplateHero;
use Illuminate\Http\Request;
use Illuminate\Support\Collection;

class PageController extends Controller
{
    /**
     * Display the homepage or a specific page
     */
    public function index()
    {
        $settings = $this->getSettings();
        
        $page = Page::with(['headerTemplate', 'footerTemplate'])
            ->where('is_homepage', true)
            ->where('status', 'published')
            ->latest('updated_at')
            ->first();

        // 1. Statik "home" Template Kontrolü
        if (view()->exists('templates.home')) {
            return $this->renderView('templates.home', $page, $settings);
        }

        // Hiç sayfa yoksa fallback
        if (!$page) {
            $meta = $this->getMeta(null, $settings);

            return view('templates.home', [
                'page' => null,
                'settings' => $settings,
                'meta' => $meta,
                'structuredData' => PageStructuredData::forPage(null, url('/'), $meta['title'] ?? null, $meta['description'] ?? null),
            ]);
        }

        return $this->renderPage($page, $settings);
    }

    /**
     * Display a specific page by slug
     */
    public function show($slug)
    {
        return $this->handleShow($slug);
    }

    /**
     * Handle nested page routes (e.g. /kurumsal/hakkimizda)
     */
    public function showNested($parentSlug, $slug)
    {
        return $this->handleShow($slug);
    }

    /**
     * Handle akademi.truncgil.com.tr subdomain
     */
    public function showAkademi()
    {
        return $this->handleShow('truncgil-akademi');
    }

    protected function handleShow($slug)
    {
        $settings = $this->getSettings();

        if ($slug === 'akademi') {
            $slug = 'truncgil-akademi';
        }

        // Redirection logic disabled for rendering the page locally on main domain.
        
        // 1. Statik View Kontrolü
        if (view()->exists("templates.$slug")) {
            $page = Page::with(['headerTemplate', 'footerTemplate'])
                ->where('slug', $slug)
                ->where('status', 'published')
                ->first();
                
            return $this->renderView("templates.$slug", $page, $settings);
        }

        // 2. Normal Dinamik Akış (DB Kaydı Zorunlu)
        $page = Page::with(['headerTemplate', 'footerTemplate'])
            ->where('slug', $slug)
            ->where('status', 'published')
            ->firstOrFail();

        return $this->renderPage($page, $settings);
    }

    /**
     * Render a page with full dynamic logic
     */
    protected function renderPage(Page $page, $settings)
    {
        $template = $page->template 
            ?? (($page->is_homepage ?? false) ? 'home' : 'generic');
        
        $view = view()->exists("templates.$template")
            ? "templates.$template"
            : 'templates.generic';
            
        return $this->renderView($view, $page, $settings);
    }

    /**
     * Shared rendering logic for both static and dynamic templates
     */
    protected function renderView(string $view, ?Page $page, $settings)
    {
        $renderedHeader = null;
        $renderedFooter = null;
        
        if ($page) {
            $renderedHeader = $this->renderHeader($page, $settings);
            $renderedFooter = $this->renderFooter($page, $settings);
        }

        $meta = $this->getMeta($page, $settings);
        $pageUrl = url()->current();

        return view($view, [
            'page' => $page,
            'pageHero' => $page ? PageTemplateHero::resolveForPage($page) : null,
            'settings' => $settings,
            'sections' => $page ? ($page->parsed_sections ?? $page->sections ?? $page->data ?? []) : [],
            'templatedSections' => $page ? ($page->templated_sections ?? collect([])) : collect([]),
            'renderedHeader' => $renderedHeader,
            'renderedFooter' => $renderedFooter,
            'meta' => $meta,
            'structuredData' => PageStructuredData::forPage(
                $page,
                $pageUrl,
                $meta['title'] ?? null,
                $meta['description'] ?? null,
            ),
        ]);
    }

    /**
     * Get settings as an object
     */
    protected function getSettings()
    {
        if (!class_exists(Setting::class)) {
            return (object) [];
        }
        
        return (object) Setting::where('is_active', true)
            ->pluck('value', 'key')
            ->toArray();
    }

    /**
     * Get meta information for a page
     */
    protected function getMeta(?Page $page, $settings)
    {
        $metaTitle = null;
        $metaDescription = null;
        $metaImage = $settings->default_meta_image ?? null;

        if ($page) {
            $metaTitle = method_exists($page, 'translate')
                ? ($page->translate('meta_title') ?: $page->translate('title'))
                : ($page->meta_title ?? $page->title ?? null);

            $metaDescription = method_exists($page, 'translate')
                ? ($page->translate('meta_description') ?: ($page->excerpt ?? null))
                : ($page->meta_description ?? $page->excerpt ?? null);
                
            if ($page->featured_image_url) {
                $metaImage = $page->featured_image_url;
            }
        }

        return [
            'title' => $metaTitle ?: ($settings->default_meta_title ?? config('app.name')),
            'description' => $metaDescription ?: ($settings->default_meta_description ?? null),
            'image' => $metaImage,
        ];
    }

    /**
     * Render header template
     */
    protected function renderHeader(Page $page, $settings)
    {
        // 1. Önce özel blade dosyası var mı kontrol et
        if (!empty($page->custom_header_blade) && view()->exists($page->custom_header_blade)) {
            return view($page->custom_header_blade, ['page' => $page])->render();
        }

        // 2. Yoksa Header Template sistemini kullan
        $headerTemplate = $page->headerTemplate;
        
        if (!$headerTemplate && isset($settings->default_header)) {
            $headerTemplate = HeaderTemplate::find($settings->default_header);
        }
        
        if ($headerTemplate) {
            $templateDefaults = $headerTemplate->default_data ?? [];
            $pageData = $page->header_data ?? [];
            $mergedHeaderData = array_merge($templateDefaults, $pageData);
            
            return TemplateService::replacePlaceholders(
                $headerTemplate->html_content,
                $mergedHeaderData,
                $page
            );
        }

        return null;
    }

    /**
     * Render footer template
     */
    protected function renderFooter(Page $page, $settings)
    {
        // 1. Önce özel blade dosyası var mı kontrol et
        if (!empty($page->custom_footer_blade) && view()->exists($page->custom_footer_blade)) {
            return view($page->custom_footer_blade, ['page' => $page])->render();
        }

        // 2. Yoksa Footer Template sistemini kullan
        $footerTemplate = $page->footerTemplate;
        
        if (!$footerTemplate && isset($settings->default_footer)) {
            $footerTemplate = FooterTemplate::find($settings->default_footer);
        }
        
        if ($footerTemplate) {
            $templateDefaults = $footerTemplate->default_data ?? [];
            $pageData = $page->footer_data ?? [];
            $mergedFooterData = array_merge($templateDefaults, $pageData);
            
            return TemplateService::replacePlaceholders(
                $footerTemplate->html_content,
                $mergedFooterData,
                $page
            );
        }

        return null;
    }

    /**
     * Get menu items for navigation
     */
    private function getMenuItems()
    {
        return Page::with(['children' => function ($query) {
                $query->where('status', 'published')
                    ->where('show_in_menu', true)
                    ->orderBy('sort_order', 'asc')
                    ->orderBy('title', 'asc');
            }])
            ->whereNull('parent_id')
            ->where('status', 'published')
            ->where('show_in_menu', true)
            ->orderBy('sort_order', 'asc')
            ->orderBy('title', 'asc')
            ->get();
    }
}