<?php

namespace App\Services;

use App\Models\DisplayPlaylist;
use App\Models\DisplayVersion;
use Illuminate\Database\Eloquent\Collection;

class DisplayPlaylistConfigBuilder
{
    /**
     * @return array{playlist: array<int, array<string, mixed>>, updated_at: string|null}
     */
    public function fromPlaylist(DisplayPlaylist $playlist): array
    {
        $playlist->loadMissing('modules.items');

        return $this->fromModules($playlist->modules, $playlist->updated_at);
    }

    /**
     * @param  Collection<int, DisplayVersion>  $modules
     * @return array{playlist: array<int, array<string, mixed>>, updated_at: string|null}
     */
    public function fromModules(Collection $modules, mixed $fallbackUpdatedAt = null): array
    {
        $playlist = $modules
            ->loadMissing('items')
            ->map(fn (DisplayVersion $module) => $this->moduleData($module))
            ->filter()
            ->values()
            ->all();

        return [
            'playlist' => $playlist,
            'updated_at' => $this->updatedAt($modules, $fallbackUpdatedAt),
        ];
    }

    /**
     * @return array<string, mixed>|null
     */
    private function moduleData(DisplayVersion $module): ?array
    {
        $items = $module->items
            ->where('is_active', true)
            ->sortBy('sort_order')
            ->values();

        return match ($module->type->value) {
            'video-display' => $this->videoDisplayData($module, $items),
            'b2in' => $this->b2inData($module, $items),
            'offers' => $this->offersData($module, $items),
            default => null,
        };
    }

    /**
     * @param  Collection<int, DisplayVersion>  $modules
     */
    private function updatedAt(Collection $modules, mixed $fallbackUpdatedAt = null): ?string
    {
        $timestamps = collect([$fallbackUpdatedAt])
            ->merge($modules->pluck('updated_at'))
            ->merge($modules->flatMap(fn (DisplayVersion $module) => $module->items->pluck('updated_at')))
            ->filter();

        return $timestamps->max()?->toIso8601String();
    }

    /**
     * @param  Collection<int, \App\Models\DisplayVersionItem>  $items
     * @return array<string, mixed>
     */
    private function videoDisplayData(DisplayVersion $module, Collection $items): array
    {
        $videos = $items->where('item_type', 'video')->values()->map(fn ($item) => [
            'src' => $this->mediaSource($item->content['filename'] ?? ''),
            'position' => $item->content['position'] ?? 25,
        ]);

        $footerContent = $items->where('item_type', 'footer')->values()->map(function ($item) {
            $data = [
                'headline' => $item->content['headline'] ?? '',
                'subline' => $item->content['subline'] ?? '',
            ];

            if (! empty($item->content['url'])) {
                $data['url'] = $item->content['url'];
            }

            return $data;
        });

        return [
            'type' => 'video-display',
            'version_name' => $module->name,
            'settings' => array_replace([
                'qr_label' => 'Website',
            ], $module->settings ?? []),
            'videoPlaylist' => $videos,
            'footerContent' => $footerContent,
        ];
    }

    private function mediaSource(string $source): string
    {
        if ($source === '' || str_starts_with($source, 'http') || str_starts_with($source, '/') || str_starts_with($source, '../')) {
            return $source;
        }

        return 'assets/'.$source;
    }

    /**
     * @param  Collection<int, \App\Models\DisplayVersionItem>  $items
     * @return array<string, mixed>
     */
    private function b2inData(DisplayVersion $module, Collection $items): array
    {
        $mediaItems = $items->where('item_type', 'media')->values()->map(fn ($item) => [
            'id' => $item->id,
            'category' => $item->content['category'] ?? 'immobilien',
            'media_type' => $item->content['media_type'] ?? 'image',
            'media_url' => $item->content['media_url'] ?? '',
            'headline' => $item->content['headline'] ?? '',
            'subline' => $item->content['subline'] ?? '',
            'duration_seconds' => $item->content['duration_seconds'] ?? 10,
            'sort_order' => $item->sort_order,
            'is_active' => true,
        ]);

        return [
            'type' => 'b2in',
            'version_name' => $module->name,
            'settings' => array_replace_recursive([
                'theme' => 'dark',
                'header_logo_url' => '../assets/b2in-logo-positive.svg',
                'header_claim' => 'Connecting Design & Property',
                'footer_url' => 'B2in.eu',
                'footer_name' => '',
                'footer_prefix' => 'by',
                'qr_url' => '',
                'transition' => [
                    'type' => 'crossfade',
                    'duration_ms' => 800,
                ],
                'default_image_duration' => 10,
            ], $module->settings ?? []),
            'items' => $mediaItems,
        ];
    }

    /**
     * @param  Collection<int, \App\Models\DisplayVersionItem>  $items
     * @return array<string, mixed>
     */
    private function offersData(DisplayVersion $module, Collection $items): array
    {
        $slides = $items->where('item_type', 'slide')->values()->map(fn ($item) => [
            'type' => $item->content['type'] ?? 'product-hero',
            'duration' => $item->content['duration'] ?? 8000,
            'image_url' => $item->content['image_url'] ?? '',
            'badge_text' => $item->content['badge_text'] ?? '',
            'eyebrow' => $item->content['eyebrow'] ?? '',
            'title' => $item->content['title'] ?? '',
            'subline' => $item->content['subline'] ?? '',
            'price' => $item->content['price'] ?? '',
            'original_price' => $item->content['original_price'] ?? '',
            'tag_text' => $item->content['tag_text'] ?? '',
            'bullets' => $item->content['bullets'] ?? [],
            'disclaimer' => $item->content['disclaimer'] ?? '',
            'qr_url' => $item->content['qr_url'] ?? '',
            'qr_title' => $item->content['qr_title'] ?? '',
            'contact' => $item->content['contact'] ?? '',
            'show_brand_text' => $item->content['show_brand_text'] ?? false,
            'brand_tagline' => $item->content['brand_tagline'] ?? '',
        ]);

        return [
            'type' => 'offers',
            'version_name' => $module->name,
            'settings' => array_replace_recursive([
                'loop' => true,
                'logo_url' => '../logo-cabinet-300.png',
                'brand_text' => 'Bielefeld',
                'footer_claim' => '',
                'footer_url' => '',
                'qr_default_title' => 'Kontakt',
                'qr_subtitle' => 'QR scannen',
                'transition' => [
                    'type' => 'fade',
                    'duration' => 600,
                ],
            ], $module->settings ?? []),
            'slides' => $slides,
        ];
    }
}