<?php

namespace App\Http\Controllers;

use App\Models\McpServer;
use Illuminate\Contracts\View\View;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Str;

class McpServerController extends Controller
{
    public function index(Request $request): View
    {
        $category = $request->string('category')->toString();
        $search = $request->string('q')->toString();

        $servers = McpServer::approved()
            ->when($category, fn ($query) => $query->where('category', $category))
            ->when($search, fn ($query) => $query->where('name', 'like', "%{$search}%"))
            ->orderByDesc('featured')
            ->orderByDesc('views')
            ->paginate(12)
            ->withQueryString();

        return view('mcp-servers.index', [
            'servers' => $servers,
            'categories' => config('mcp_servers.categories'),
            'activeCategory' => $category,
            'search' => $search,
            'title' => 'MCP Servers Directory — '.config('app.name'),
            'description' => 'Discover Model Context Protocol servers, with docs, install instructions, and config examples.',
            'canonical' => route('mcp-servers.index'),
        ]);
    }

    public function category(string $category): View
    {
        abort_unless(array_key_exists($category, config('mcp_servers.categories')), 404);

        $servers = McpServer::approved()
            ->where('category', $category)
            ->orderByDesc('featured')
            ->orderByDesc('views')
            ->paginate(12);

        $label = config("mcp_servers.categories.{$category}");

        return view('mcp-servers.category', [
            'servers' => $servers,
            'categories' => config('mcp_servers.categories'),
            'category' => $category,
            'label' => $label,
            'title' => $label.' MCP Servers — '.config('app.name'),
            'description' => "MCP servers for {$label}.",
            'canonical' => route('mcp-servers.category', $category),
        ]);
    }

    public function show(McpServer $mcpServer): View
    {
        abort_unless($mcpServer->approved, 404);

        $mcpServer->increment('views');

        $related = McpServer::approved()
            ->where('category', $mcpServer->category)
            ->whereKeyNot($mcpServer->id)
            ->limit(4)
            ->get();

        return view('mcp-servers.show', [
            'server' => $mcpServer,
            'related' => $related,
            'title' => $mcpServer->name.' — MCP Servers — '.config('app.name'),
            'description' => $this->metaDescription($mcpServer->description),
            'canonical' => route('mcp-servers.show', $mcpServer),
            'image' => $mcpServer->logo_url,
        ]);
    }

    public function visit(McpServer $mcpServer): RedirectResponse
    {
        abort_unless($mcpServer->approved, 404);

        $mcpServer->increment('clicks');

        return redirect()->away($mcpServer->url);
    }

    /**
     * Truncate to ~155 chars without cutting a word in half. Google appends
     * its own ellipsis when it truncates in search results, so we don't add one.
     */
    private function metaDescription(string $description, int $limit = 155): string
    {
        if (Str::length($description) <= $limit) {
            return $description;
        }

        return Str::of($description)->limit($limit, '')->beforeLast(' ')->toString();
    }
}