<?php

declare(strict_types=1);

namespace App\Http\Controllers;

use App\Enums\ClientStatus;
use App\Models\Client;
use App\Models\ClientCategory;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Storage;
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', 'mediaFiles'])
            ->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');
        $client->setRelation('events', $client->events()->latest()->limit(5)->get());
        $client->setRelation('invoices', $client->invoices()->latest()->limit(5)->get());
        $client->setRelation('contentBriefs', $client->contentBriefs()->latest()->limit(5)->get());
        $client->setRelation('mediaFiles', $client->mediaFiles()->latest()->limit(10)->get());

        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.');
    }

    public function quickStore(Request $request): JsonResponse
    {
        $validated = $request->validate([
            'name'    => 'required|string|max:255',
            'email'   => 'nullable|email|unique:clients,email',
            'phone'   => 'nullable|string|max:50',
            'company' => 'nullable|string|max:255',
        ]);

        $client = Client::create(array_merge($validated, ['status' => 'active']));

        return response()->json(['id' => $client->id, 'name' => $client->name]);
    }

    public function uploadAvatar(Request $request, Client $client): JsonResponse
    {
        $request->validate(['avatar' => 'required|image|max:2048']);

        if ($client->avatar) {
            Storage::disk('public')->delete($client->avatar);
        }

        $path = $request->file('avatar')->store('client-avatars', 'public');
        $client->update(['avatar' => $path]);

        return response()->json(['url' => asset('storage/' . $path)]);
    }

    public function deleteAvatar(Client $client): JsonResponse
    {
        if ($client->avatar) {
            Storage::disk('public')->delete($client->avatar);
            $client->update(['avatar' => null]);
        }

        return response()->json(['ok' => true]);
    }
}