<?php

namespace App\Http\Controllers\Api\V1;

use App\Http\Controllers\Controller;
use App\Models\Agreement;
use App\Models\Article;
use App\Models\Banner;
use App\Models\Category;
use App\Models\HomeSection;
use App\Models\Navigation;
use App\Models\Plan;
use App\Models\Tool;
use App\Models\UserToolOpen;
use App\Support\Presenter;
use App\Support\Settings;
use Illuminate\Http\Request;

class PortalController extends Controller
{
    public function meta()
    {
        $categories = Category::query()
            ->with(['children' => fn ($q) => $q->where('status', 'published')])
            ->whereNull('parent_id')
            ->where('status', 'published')
            ->where('show_in_nav', true)
            ->orderByDesc('sort')
            ->orderBy('id')
            ->get();

        return $this->ok([
            'site_name' => Settings::get('site_name', '轻舟'),
            'description' => Settings::get('site_description', ''),
            'icp' => Settings::get('icp', ''),
            'mail_enabled' => Settings::bool('mail_enabled'),
            'nav' => $this->nav('header'),
            'footer' => $this->nav('footer'),
            'categories' => $categories->map(fn (Category $category) => $this->categoryNode($category)),
        ]);
    }

    public function home()
    {
        $sections = HomeSection::query()
            ->with(['tools' => fn ($q) => $q->published()->with('tags')])
            ->where('status', 'published')
            ->orderByDesc('sort')
            ->orderBy('id')
            ->get();
        $banners = Banner::query()->where('status', 'published')
            ->where(function ($q) {
                $q->whereNull('starts_at')->orWhere('starts_at', '<=', now());
            })
            ->where(function ($q) {
                $q->whereNull('ends_at')->orWhere('ends_at', '>=', now());
            })
            ->orderByDesc('sort')->get();
        $announcement = Article::query()->published()->where('type', 'announcement')->latest('published_at')->first();

        return $this->ok([
            'sections' => $sections->map(fn (HomeSection $section) => [
                'id' => $section->id,
                'title' => $section->title,
                'slug' => $section->slug,
                'tools' => $section->tools->take($section->display_limit)->map(fn (Tool $tool) => Presenter::toolCard($tool))->values(),
            ]),
            'banners' => $banners->map(fn (Banner $banner) => [
                'id' => $banner->id,
                'title' => $banner->title,
                'image' => $banner->image,
                'link' => $banner->link,
            ]),
            'announcement' => $announcement ? [
                'title' => $announcement->title,
                'slug' => $announcement->slug,
                'summary' => $announcement->summary,
            ] : null,
        ]);
    }

    public function category(Request $request, string $slug)
    {
        $category = Category::query()->with('children')->where('slug', $slug)->where('status', 'published')->firstOrFail();
        $ids = $category->children->pluck('id')->push($category->id);
        $query = Tool::query()->published()->with('tags')->whereHas('categories', fn ($q) => $q->whereIn('categories.id', $ids));
        $this->applySort($query, (string) $request->query('sort', 'recommend'));
        $page = $query->paginate(24);

        return $this->ok([
            'category' => $this->categoryNode($category),
            'items' => collect($page->items())->map(fn (Tool $tool) => Presenter::toolCard($tool))->values(),
            'total' => $page->total(),
            'page' => $page->currentPage(),
            'per_page' => $page->perPage(),
        ]);
    }

    public function tool(string $slug)
    {
        $tool = Tool::query()->published()->with('tags', 'categories')->where('slug', $slug)->firstOrFail();
        $related = Tool::query()->published()->with('tags')
            ->whereKeyNot($tool->id)
            ->whereHas('categories', fn ($q) => $q->whereIn('categories.id', $tool->categories->pluck('id')))
            ->limit(4)
            ->get();

        return $this->ok(Presenter::toolDetail($tool) + [
            'related' => $related->map(fn (Tool $item) => Presenter::toolCard($item))->values(),
        ]);
    }

    public function go(string $slug)
    {
        $tool = Tool::query()->published()->where('slug', $slug)->where('type', 'link')->firstOrFail();
        $tool->increment('clicks');

        return redirect()->away($tool->open_url);
    }

    public function search(Request $request)
    {
        $keyword = trim((string) $request->query('q', ''));
        $scope = (string) $request->query('scope', 'tools');
        $like = '%'.addcslashes($keyword, '%_\\').'%';
        if ($scope === 'help') {
            $query = Article::query()->published()->where('type', 'help');
            if ($keyword !== '') {
                $query->where(fn ($q) => $q->where('title', 'like', $like)->orWhere('summary', 'like', $like));
            }
            $page = $query->latest('published_at')->paginate(24);

            return $this->ok([
                'items' => collect($page->items())->map(fn (Article $article) => [
                    'title' => $article->title,
                    'slug' => $article->slug,
                    'summary' => $article->summary,
                ])->values(),
                'total' => $page->total(),
                'page' => $page->currentPage(),
                'per_page' => $page->perPage(),
            ]);
        }
        if ($scope === 'recent') {
            $user = $request->user();
            if (! $user) {
                return response()->json(['message' => '请先登录', 'code' => 'unauthenticated'], 401);
            }
            $opens = UserToolOpen::query()->with('tool.tags')->where('user_id', $user->id)->orderByDesc('last_opened_at')->get();
            $items = $opens->filter(function (UserToolOpen $open) use ($keyword) {
                return $open->tool && $open->tool->status === 'published'
                    && ($keyword === '' || str_contains($open->tool->name, $keyword) || str_contains($open->tool->summary, $keyword));
            })->map(fn (UserToolOpen $open) => Presenter::toolCard($open->tool))->values();

            return $this->ok(['items' => $items, 'total' => $items->count(), 'page' => 1, 'per_page' => $items->count()]);
        }

        $query = Tool::query()->published()->with('tags');
        if ($keyword !== '') {
            $query->where(function ($q) use ($like) {
                $q->where('name', 'like', $like)
                    ->orWhere('summary', 'like', $like)
                    ->orWhereHas('tags', fn ($tag) => $tag->where('name', 'like', $like));
            });
        }
        $page = $query->orderByDesc('is_recommended')->orderByDesc('sort')->paginate(24);
        $hot = $page->total() === 0
            ? Tool::query()->published()->with('tags')->orderByDesc('is_recommended')->limit(8)->get()
            : collect();

        return $this->ok([
            'items' => collect($page->items())->map(fn (Tool $tool) => Presenter::toolCard($tool))->values(),
            'hot' => $hot->map(fn (Tool $tool) => Presenter::toolCard($tool))->values(),
            'total' => $page->total(),
            'page' => $page->currentPage(),
            'per_page' => $page->perPage(),
        ]);
    }

    public function plans()
    {
        $plans = Plan::query()->with('entitlements')->where('status', 'published')->orderByDesc('sort')->orderBy('id')->get();

        return $this->ok($plans->map(fn (Plan $plan) => Presenter::plan($plan))->values());
    }

    public function articles(Request $request)
    {
        $type = (string) $request->query('type', 'help');
        $items = Article::query()->published()->where('type', $type)->latest('published_at')->get();

        return $this->ok($items->map(fn (Article $article) => [
            'title' => $article->title,
            'slug' => $article->slug,
            'summary' => $article->summary,
            'published_at' => $article->published_at?->toIso8601String(),
        ])->values());
    }

    public function article(string $slug)
    {
        $article = Article::query()->published()->where('slug', $slug)->firstOrFail();

        return $this->ok([
            'title' => $article->title,
            'slug' => $article->slug,
            'summary' => $article->summary,
            'body' => $article->body,
            'type' => $article->type,
            'published_at' => $article->published_at?->toIso8601String(),
        ]);
    }

    public function agreement(string $type)
    {
        $agreement = Agreement::query()->where('type', $type)->firstOrFail();

        return $this->ok([
            'type' => $agreement->type,
            'title' => $agreement->title,
            'body' => $agreement->body,
        ]);
    }

    private function nav(string $group): array
    {
        return Navigation::query()->where('group_name', $group)->where('status', 'published')->orderByDesc('sort')->get()
            ->map(fn (Navigation $item) => ['title' => $item->title, 'link' => $item->link])->all();
    }

    private function categoryNode(Category $category): array
    {
        return [
            'id' => $category->id,
            'name' => $category->name,
            'slug' => $category->slug,
            'icon' => $category->icon,
            'children' => $category->children->map(fn (Category $child) => [
                'id' => $child->id,
                'name' => $child->name,
                'slug' => $child->slug,
                'icon' => $child->icon,
            ])->values(),
        ];
    }

    private function applySort($query, string $sort): void
    {
        match ($sort) {
            'latest' => $query->orderByDesc('published_at'),
            'name' => $query->orderBy('name'),
            default => $query->orderByDesc('is_recommended')->orderByDesc('sort'),
        };
    }
}