<?php

declare(strict_types=1);

namespace App\Http\Controllers;

use App\Enums\ClientStatus;
use App\Models\Client;
use App\Models\ClientCategory;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\View\View;

class ClientController extends Controller
{
    private function categoryTree(): \Illuminate\Support\Collection
    {
        return ClientCategory::with('children')
            ->whereNull('parent_id')
            ->orderBy('sort_order')
            ->get();
    }

    private function flatCategories(): \Illuminate\Support\Collection
    {
        $flat = collect();
        foreach ($this->categoryTree() as $parent) {
            $flat->push($parent);
            foreach ($parent->children as $child) {
                $flat->push($child);
            }
        }
        return $flat;
    }

    public function index(Request $request): View
    {
        $query = Client::with('category')
            ->withCount(['invoices', 'events', 'contentBriefs'])
            ->latest();

        if ($request->filled('category')) {
            $query->where('category_id', $request->category);
        }

        if ($request->filled('status')) {
            $query->where('status', $request->status);
        }

        $clients    = $query->paginate(12)->withQueryString();
        $categories = $this->categoryTree();
        $statuses   = ClientStatus::cases();

        return view('clients.index', compact('clients', 'categories', 'statuses'));
    }

    public function create(): View
    {
        $statuses   = ClientStatus::cases();
        $categories = $this->flatCategories();
        $categoryTree = $this->categoryTree();

        return view('clients.create', compact('statuses', 'categories', 'categoryTree'));
    }

    public function store(Request $request): RedirectResponse
    {
        $validated = $request->validate([
            'name'           => 'required|string|max:255',
            'email'          => 'nullable|email|unique:clients,email',
            'phone'          => 'nullable|string|max:50',
            'company'        => 'nullable|string|max:255',
            'ig_handle'      => 'nullable|string|max:100',
            'tiktok_handle'  => 'nullable|string|max:100',
            'youtube_handle' => 'nullable|string|max:100',
            'address_line1'  => 'nullable|string|max:255',
            'address_line2'  => 'nullable|string|max:255',
            'city'           => 'nullable|string|max:100',
            'state'          => 'nullable|string|max:100',
            'postal_code'    => 'nullable|string|max:20',
            'country'        => 'nullable|string|max:100',
            'status'         => 'required|in:active,inactive,prospect',
            'category_id'    => 'nullable|exists:client_categories,id',
            'notes'          => 'nullable|string',
        ]);

        Client::create($validated);

        return redirect()->route('clients.index')
            ->with('success', '🐱 Client added successfully!');
    }

    public function show(Client $client): View
    {
        $client->load([
            'category',
            'events'       => fn ($q) => $q->latest()->limit(5),
            'invoices'     => fn ($q) => $q->latest()->limit(5),
            'contentBriefs'=> fn ($q) => $q->latest()->limit(5),
            'mediaFiles'   => fn ($q) => $q->latest()->limit(10),
        ]);

        return view('clients.show', compact('client'));
    }

    public function edit(Client $client): View
    {
        $statuses     = ClientStatus::cases();
        $categories   = $this->flatCategories();
        $categoryTree = $this->categoryTree();

        return view('clients.edit', compact('client', 'statuses', 'categories', 'categoryTree'));
    }

    public function update(Request $request, Client $client): RedirectResponse
    {
        $validated = $request->validate([
            'name'           => 'required|string|max:255',
            'email'          => 'nullable|email|unique:clients,email,' . $client->id,
            'phone'          => 'nullable|string|max:50',
            'company'        => 'nullable|string|max:255',
            'ig_handle'      => 'nullable|string|max:100',
            'tiktok_handle'  => 'nullable|string|max:100',
            'youtube_handle' => 'nullable|string|max:100',
            'address_line1'  => 'nullable|string|max:255',
            'address_line2'  => 'nullable|string|max:255',
            'city'           => 'nullable|string|max:100',
            'state'          => 'nullable|string|max:100',
            'postal_code'    => 'nullable|string|max:20',
            'country'        => 'nullable|string|max:100',
            'status'         => 'required|in:active,inactive,prospect',
            'category_id'    => 'nullable|exists:client_categories,id',
            'notes'          => 'nullable|string',
        ]);

        $client->update($validated);

        return redirect()->route('clients.show', $client)
            ->with('success', '🐱 Client updated successfully!');
    }

    public function destroy(Client $client): RedirectResponse
    {
        $client->delete();

        return redirect()->route('clients.index')
            ->with('success', '🐱 Client removed.');
    }
}