<?php

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Concerns\ProxiesBackend;
use App\Http\Controllers\Controller;
use App\Services\BackendHttpClient;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Inertia\Inertia;
use Inertia\Response;

class PromoAdminController extends Controller
{
    use ProxiesBackend;

    public function __construct(private readonly BackendHttpClient $client)
    {
    }

    private function assertAdmin(): void
    {
        if (!Auth::check() || strtolower((string) Auth::user()->role) !== 'admin') {
            abort(403, 'Nur für Admins');
        }
    }

    /**
     * Show simple admin page to manage promos (data from upstream)
     */
    public function index(Request $request): Response
    {
        $this->assertAdmin();

        $promos = [];
        try {
            $res = $this->client->get($request, '/admin/promos', ['per_page' => 20], retry: true);
            if ($res->successful()) {
                $j = $res->json() ?: [];
                $promos = $j['data'] ?? $j['promos'] ?? $j;
            }
        } catch (\Throwable $e) {
            // show empty list with error message on page via flash if desired
        }

        return Inertia::render('Admin/Promos', [
            'promos' => $promos,
        ]);
    }

    /**
     * Create a new promo via upstream
     */
    public function store(Request $request)
    {
        $this->assertAdmin();

        $data = $this->validateData($request);
        $data['code'] = strtoupper(trim($data['code']));
        $data['is_active'] = $data['is_active'] ?? true;

        try {
            $res = $this->client->post($request, '/admin/promos', $data);
            if ($res->successful()) {
                return back()->with('success', 'Promo erstellt.');
            }
            if ($res->clientError()) {
                $msg = data_get($res->json(), 'message', 'Ungültige Eingabe');
                return back()->withErrors(['promo' => $msg]);
            }
            if ($res->serverError()) {
                return back()->withErrors(['promo' => 'Service temporär nicht verfügbar']);
            }
            return back()->withErrors(['promo' => 'API Server nicht erreichbar']);
        } catch (\Throwable $e) {
            return back()->withErrors(['promo' => 'API Server nicht erreichbar']);
        }
    }

    /**
     * Update an existing promo via upstream
     */
    public function update(Request $request, int $id)
    {
        $this->assertAdmin();

        $data = $this->validateData($request, $id);
        if (isset($data['code'])) {
            $data['code'] = strtoupper(trim($data['code']));
        }

        try {
            $res = $this->client->patch($request, "/admin/promos/{$id}", $data);
            if ($res->successful()) {
                return back()->with('success', 'Promo aktualisiert.');
            }
            if ($res->clientError()) {
                $msg = data_get($res->json(), 'message', 'Ungültige Eingabe');
                return back()->withErrors(['promo' => $msg]);
            }
            if ($res->serverError()) {
                return back()->withErrors(['promo' => 'Service temporär nicht verfügbar']);
            }
            return back()->withErrors(['promo' => 'API Server nicht erreichbar']);
        } catch (\Throwable $e) {
            return back()->withErrors(['promo' => 'API Server nicht erreichbar']);
        }
    }

    private function validateData(Request $request, ?int $ignoreId = null): array
    {
        $isUpdate = $request->isMethod('patch') || $request->isMethod('put');

        $rules = [
            'code' => [($isUpdate ? 'sometimes' : 'required'), 'string', 'max:64'],
            'description' => [($isUpdate ? 'sometimes' : 'nullable'), 'nullable', 'string', 'max:255'],
            'bonus_amount' => [($isUpdate ? 'sometimes' : 'required'), 'numeric', 'min:0'],
            'wager_multiplier' => [($isUpdate ? 'sometimes' : 'required'), 'integer', 'min:0', 'max:1000'],
            'per_user_limit' => [($isUpdate ? 'sometimes' : 'required'), 'integer', 'min:1', 'max:1000'],
            'global_limit' => [($isUpdate ? 'sometimes' : 'nullable'), 'nullable', 'integer', 'min:1', 'max:1000000'],
            'starts_at' => [($isUpdate ? 'sometimes' : 'nullable'), 'nullable', 'date'],
            'ends_at' => [($isUpdate ? 'sometimes' : 'nullable'), 'nullable', 'date', 'after_or_equal:starts_at'],
            'min_deposit' => [($isUpdate ? 'sometimes' : 'nullable'), 'nullable', 'numeric', 'min:0'],
            'bonus_expires_days' => [($isUpdate ? 'sometimes' : 'nullable'), 'nullable', 'integer', 'min:1', 'max:365'],
            'is_active' => [($isUpdate ? 'sometimes' : 'nullable'), 'boolean'],
        ];

        return $request->validate($rules);
    }
}