<?php

namespace FluxCms\Components\Livewire\Backend;

use FluxCms\Core\Models\Page;
use FluxCms\Core\Models\PageComponent;
use FluxCms\Core\Services\ComponentRegistry;
use Illuminate\Support\Collection;
use Livewire\Attributes\On;
use Livewire\Component;

class PageEditor extends Component
{
    public Page $page;

    public Collection $components;

    public array $availableLanguages = [];

    public string $currentLocale = 'de';

    public bool $showComponentModal = false;

    public array $availableComponents = [];

    public string $selectedCategory = 'all';

    public bool $isLoading = false;

    protected ComponentRegistry $componentRegistry;

    public function boot(ComponentRegistry $componentRegistry)
    {
        $this->componentRegistry = $componentRegistry;
    }

    public function mount(Page $page)
    {
        $this->page = $page;
        $this->availableLanguages = array_keys(config('flux-cms.locales', ['de' => 'Deutsch', 'en' => 'English']));
        $this->currentLocale = app()->getLocale();
        $this->loadComponents();
        $this->loadAvailableComponents();
    }

    public function render()
    {
        return view('flux-cms-components::livewire.backend.page-editor')
            ->layout('flux-cms-components::layouts.admin');
    }

    /**
     * Load page components
     */
    public function loadComponents()
    {
        $this->components = $this->page->allComponents()->ordered()->get();
    }

    /**
     * Load available components from registry
     */
    public function loadAvailableComponents()
    {
        $this->availableComponents = $this->componentRegistry->getComponentsByCategory();
    }

    /**
     * Switch locale
     */
    public function switchLocale(string $locale)
    {
        if (in_array($locale, $this->availableLanguages)) {
            $this->currentLocale = $locale;
        }
    }

    /**
     * Show add component modal
     */
    public function showAddComponentModal()
    {
        $this->loadAvailableComponents(); // Refresh components
        $this->showComponentModal = true;
    }

    /**
     * Close add component modal
     */
    public function closeAddComponentModal()
    {
        $this->showComponentModal = false;
        $this->selectedCategory = 'all';
    }

    /**
     * Set category filter
     */
    public function setCategory(string $category)
    {
        $this->selectedCategory = $category;
    }

    /**
     * Add new component
     */
    public function addComponent(string $componentClass)
    {
        if (! $this->componentRegistry->isValidComponent($componentClass)) {
            $this->addError('component', 'Invalid component selected.');

            return;
        }

        try {
            $maxOrder = $this->page->allComponents()->max('order') ?? 0;

            $component = $this->page->allComponents()->create([
                'component_class' => $componentClass,
                'order' => $maxOrder + 1,
                'content' => $this->getDefaultContent($componentClass),
                'is_active' => true,
            ]);

            $this->loadComponents();
            $this->closeAddComponentModal();

            $this->dispatch('scroll-to-component', componentId: $component->id);
            session()->flash('success', 'Component added successfully.');

        } catch (\Exception $e) {
            $this->addError('component', 'Error adding component: '.$e->getMessage());
        }
    }

    /**
     * Delete component
     */
    public function deleteComponent(int $componentId)
    {
        try {
            $component = $this->components->firstWhere('id', $componentId);

            if (! $component) {
                $this->addError('component', 'Component not found.');

                return;
            }

            $component->delete();
            $this->loadComponents();
            $this->reorderComponents();

            session()->flash('success', 'Component deleted successfully.');

        } catch (\Exception $e) {
            $this->addError('component', 'Error deleting component: '.$e->getMessage());
        }
    }

    /**
     * Duplicate component
     */
    public function duplicateComponent(int $componentId)
    {
        try {
            $component = $this->components->firstWhere('id', $componentId);

            if (! $component) {
                $this->addError('component', 'Component not found.');

                return;
            }

            $duplicate = $component->duplicate();
            $this->loadComponents();

            $this->dispatch('scroll-to-component', componentId: $duplicate->id);
            session()->flash('success', 'Component duplicated successfully.');

        } catch (\Exception $e) {
            $this->addError('component', 'Error duplicating component: '.$e->getMessage());
        }
    }

    /**
     * Toggle component active state
     */
    public function toggleComponent(int $componentId)
    {
        try {
            $component = $this->components->firstWhere('id', $componentId);

            if (! $component) {
                return;
            }

            $component->update(['is_active' => ! $component->is_active]);
            $this->loadComponents();

        } catch (\Exception $e) {
            $this->addError('component', 'Error toggling component: '.$e->getMessage());
        }
    }

    /**
     * Update component order
     */
    #[On('components-reordered')]
    public function updateOrder(array $orderedIds)
    {
        try {
            foreach ($orderedIds as $index => $id) {
                PageComponent::where('id', $id)->update(['order' => $index + 1]);
            }

            $this->loadComponents();
            session()->flash('success', 'Component order updated.');

        } catch (\Exception $e) {
            $this->addError('order', 'Error updating order: '.$e->getMessage());
        }
    }

    /**
     * Reorder components to close gaps
     */
    protected function reorderComponents()
    {
        $components = $this->page->allComponents()->orderBy('order')->get();

        foreach ($components as $index => $component) {
            $component->update(['order' => $index + 1]);
        }
    }

    /**
     * Generate default content for component
     */
    protected function getDefaultContent(string $componentClass): array
    {
        $config = $this->componentRegistry->getComponentConfig($componentClass);
        $content = [];

        if (empty($config['fields'])) {
            return $content;
        }

        foreach ($config['fields'] as $field) {
            if (! $field instanceof \FluxCms\Core\FieldTypes\BaseField) {
                continue;
            }

            $defaultValue = $field->getDefault();

            if ($field->isTranslatable()) {
                foreach ($this->availableLanguages as $locale) {
                    $content[$field->getKey()][$locale] = $defaultValue;
                }
            } else {
                $content[$field->getKey()] = $defaultValue;
            }
        }

        return $content;
    }

    /**
     * Update page data
     */
    public function updatePageData()
    {
        try {
            $this->validate([
                'page.title' => 'required|array',
                'page.slug' => 'required|array',
                'page.meta_description' => 'nullable|array',
            ]);

            $this->page->save();
            session()->flash('success', 'Page data saved successfully.');

        } catch (\Exception $e) {
            $this->addError('page', 'Error saving page: '.$e->getMessage());
        }
    }

    /**
     * Toggle publish status
     */
    public function togglePublish()
    {
        try {
            if ($this->page->is_published) {
                $this->page->unpublish();
                $message = 'Page unpublished successfully.';
            } else {
                $this->page->publish();
                $message = 'Page published successfully.';
            }

            session()->flash('success', $message);

        } catch (\Exception $e) {
            $this->addError('publish', 'Error updating publish status: '.$e->getMessage());
        }
    }

    /**
     * Create version
     */
    public function createVersion(?string $description = null)
    {
        try {
            $this->page->createVersion($description, auth()->id());
            session()->flash('success', 'Version created successfully.');

        } catch (\Exception $e) {
            $this->addError('version', 'Error creating version: '.$e->getMessage());
        }
    }

    /**
     * Preview page
     */
    public function preview()
    {
        $locale = $this->currentLocale;
        $slug = $this->page->getTranslation('slug', $locale);

        if (empty($slug)) {
            $this->addError('preview', 'No slug available for current language.');

            return;
        }

        $url = $this->page->getUrl($locale).'?preview=1';
        $this->dispatch('open-preview', url: $url);
    }

    /**
     * Get available categories for filter
     */
    public function getAvailableCategoriesProperty(): array
    {
        $categories = ['all' => 'All Categories'];

        foreach ($this->availableComponents as $category => $components) {
            $categories[$category] = $category;
        }

        return $categories;
    }

    /**
     * Get filtered components for modal
     */
    public function getFilteredComponentsProperty(): array
    {
        if ($this->selectedCategory === 'all') {
            $components = [];
            foreach ($this->availableComponents as $category => $categoryComponents) {
                $components = array_merge($components, $categoryComponents);
            }

            return $components;
        }

        return $this->availableComponents[$this->selectedCategory] ?? [];
    }

    /**
     * Get page status
     */
    public function getPageStatusProperty(): string
    {
        if (! $this->page->is_published) {
            return 'draft';
        }

        if ($this->page->published_at && $this->page->published_at->isFuture()) {
            return 'scheduled';
        }

        return 'published';
    }
}