<?php

namespace App\Http\Controllers\Customer;

use App\Http\Controllers\ApiController;
use App\Http\Requests\Customer\ActivateCustomerRequest;
use App\Http\Requests\Customer\IndexCustomerRequest;
use App\Http\Requests\Customer\StoreCustomerRequest;
use App\Http\Requests\Customer\UpdateCustomerRequest;
use App\Http\Resources\Customer\CustomerResource;
use App\Services\Customer\CustomerService;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Http;
use Illuminate\Validation\ValidationException;

class CustomerController extends ApiController
{
    public function __construct(protected CustomerService $service) {}

    public function index(IndexCustomerRequest $request)
    {
        return $this->successPaginated(
            $this->service->list($this->scope($request), $request->validated(), $request->user(), $this->tenantId($request)),
            CustomerResource::class,
            'Daftar customer berhasil diambil'
        );
    }

    public function options(Request $request)
    {
        return $this->success(
            $this->service->options($request->user(), $this->tenantId($request)),
            'Pilihan relasi customer berhasil diambil'
        );
    }

    public function odpPorts(Request $request, int $node)
    {
        $data=$request->validate(['customer_id'=>['nullable','integer','exists:customers,id']]);
        return $this->success($this->service->availableOdpPorts($node,$request->user(),$this->tenantId($request),$data['customer_id'] ?? null),'Port ODP tersedia berhasil diambil');
    }

    public function ocrKtp(Request $request)
    {
        $data = $request->validate([
            'image' => ['required', 'image', 'mimes:jpeg,jpg,png,webp', 'max:5120'],
            'tenant_id' => ['nullable', 'integer', 'exists:tenants,id'],
        ]);
        $tenantId = $request->user()->isMasterAdmin()
            ? ($data['tenant_id'] ?? $request->attributes->get('tenant_id'))
            : $request->attributes->get('tenant_id');
        abort_unless($tenantId, 422, 'Tenant wajib dipilih sebelum menjalankan OCR.');
        if (! $request->user()->isMasterAdmin()) {
            abort_unless($request->user()->userTenants()->where('tenant_id', $tenantId)->exists(), 403);
        }
        $setting = \App\Models\TenantInstallationSetting::where('tenant_id', $tenantId)->first();
        abort_unless($setting?->ktp_ocr_enabled, 422, 'OCR KTP belum diaktifkan untuk tenant ini.');
        abort_unless($setting->ocr_provider && $setting->ocr_api_key, 422, 'Provider atau API key OCR belum dikonfigurasi.');

        $file = $data['image'];
        $mime = $file->getMimeType();
        $base64 = base64_encode(file_get_contents($file->getRealPath()));
        $prompt = 'Baca KTP Indonesia ini. Kembalikan hanya JSON valid tanpa markdown dengan field: nik, nama, alamat, rt_rw, kelurahan_desa, kecamatan, kabupaten_kota, provinsi. Gunakan null bila tidak terbaca.';

        if ($setting->ocr_provider === 'openai') {
            $response = Http::withToken($setting->ocr_api_key)->timeout(60)->post('https://api.openai.com/v1/chat/completions', [
                'model' => 'gpt-4.1-mini',
                'response_format' => ['type' => 'json_object'],
                'messages' => [['role' => 'user', 'content' => [
                    ['type' => 'text', 'text' => $prompt],
                    ['type' => 'image_url', 'image_url' => ['url' => "data:{$mime};base64,{$base64}"]],
                ]]],
            ]);
            $content = $response->successful() ? $response->json('choices.0.message.content') : null;
        } else {
            $response = Http::timeout(60)->post('https://generativelanguage.googleapis.com/v1beta/models/gemini-2.5-flash:generateContent?key='.urlencode($setting->ocr_api_key), [
                'contents' => [['parts' => [['text' => $prompt], ['inline_data' => ['mime_type' => $mime, 'data' => $base64]]]]],
                'generationConfig' => ['responseMimeType' => 'application/json'],
            ]);
            $content = $response->successful() ? $response->json('candidates.0.content.parts.0.text') : null;
        }
        if (! $response->successful() || ! $content) {
            throw ValidationException::withMessages(['image' => 'Provider AI gagal membaca KTP. Periksa API key, kuota, dan kualitas gambar.']);
        }
        $result = json_decode(trim(str_replace(['```json', '```'], '', $content)), true);
        if (! is_array($result)) throw ValidationException::withMessages(['image' => 'Respons OCR tidak dapat diproses.']);

        return $this->success($result, 'KTP berhasil dibaca');
    }

    public function store(StoreCustomerRequest $request)
    {
        return $this->created(
            new CustomerResource($this->service->create($request->validated(), $request->user(), $this->tenantId($request))),
            'Customer berhasil didaftarkan'
        );
    }

    public function show(Request $request, int $id)
    {
        $customer = $this->service->find($id, $this->scope($request) === 'trash');
        $this->authorizeTenant($request, $customer->tenant_id);

        return $this->success(new CustomerResource($customer), 'Detail customer berhasil diambil');
    }

    public function update(UpdateCustomerRequest $request, int $id)
    {
        $customer = $this->service->find($id);
        $this->authorizeTenant($request, $customer->tenant_id);

        return $this->updated(
            new CustomerResource($this->service->update($customer, $request->validated(), $request->user())),
            'Data customer berhasil diperbarui'
        );
    }

    public function prepareActivation(UpdateCustomerRequest $request, int $id)
    {
        $customer = $this->service->find($id);
        $this->authorizeTenant($request, $customer->tenant_id);
        $mode = \App\Models\TenantInstallationSetting::firstOrCreate(
            ['tenant_id' => $customer->tenant_id],
            ['activation_mode' => 'list_order']
        )->activation_mode;
        abort_unless($mode === 'list_order', 422, 'Tenant mengatur persiapan aktivasi melalui Ticket.');

        $customer = $this->service->update($customer, $request->validated(), $request->user());
        $customer = $this->service->ensureActivationCode($customer);
        return $this->updated(
            new CustomerResource($customer),
            'Persiapan aktivasi berhasil disimpan'
        );
    }

    public function updateRegistration(UpdateCustomerRequest $request, int $id)
    {
        $customer = $this->service->find($id);
        $this->authorizeTenant($request, $customer->tenant_id);

        return $this->updated(
            new CustomerResource($this->service->update($customer, $request->validated(), $request->user())),
            'Data registrasi berhasil disimpan'
        );
    }

    public function activate(ActivateCustomerRequest $request, int $id)
    {
        $customer = $this->service->find($id);
        $this->authorizeTenant($request, $customer->tenant_id);

        return $this->updated(new CustomerResource($this->service->activate($customer, $request->validated(), $request->user())), 'Customer berhasil diaktifkan');
    }

    public function deactivate(Request $request, int $id)
    {
        $customer = $this->service->find($id);
        $this->authorizeTenant($request, $customer->tenant_id);

        return $this->updated(new CustomerResource($this->service->deactivate($customer)), 'Customer berhasil dinonaktifkan');
    }

    public function destroy(Request $request, int $id)
    {
        $customer = $this->service->find($id);
        $this->authorizeTenant($request, $customer->tenant_id);
        $this->service->trash($customer);

        return $this->deleted('Customer dipindahkan ke Sampah');
    }

    public function cancelOrder(Request $request, int $id)
    {
        $customer = $this->service->find($id);
        $this->authorizeTenant($request, $customer->tenant_id);
        abort_unless($customer->status === 'order', 422, 'Hanya customer dalam List Order yang dapat dihapus melalui aksi ini.');
        $this->service->trash($customer);

        return $this->deleted('List Order dipindahkan ke Sampah');
    }

    public function restore(Request $request, int $id)
    {
        $customer = $this->service->find($id, true);
        $this->authorizeTenant($request, $customer->tenant_id);

        return $this->updated(new CustomerResource($this->service->restore($customer)), 'Customer berhasil dipulihkan');
    }

    public function forceDelete(Request $request, int $id)
    {
        $customer = $this->service->find($id, true);
        $this->authorizeTenant($request, $customer->tenant_id);
        $this->service->forceDelete($customer);

        return $this->deleted('Customer dihapus permanen');
    }

    private function scope(Request $request): string
    {
        return $request->route()->defaults['customer_scope'] ?? 'orders';
    }

    private function tenantId(Request $request): ?int
    {
        return $request->attributes->get('tenant_id');
    }

    private function authorizeTenant(Request $request, int $tenantId): void
    {
        abort_unless($request->user()->isMasterAdmin() || $tenantId === $this->tenantId($request), 403);
    }
}