<?php

namespace App\Services;

use App\Enums\PaymentSplitStatusEnum;
use App\Enums\PaymentStatusEnum;
use App\Models\Address;
use App\Models\ClientPaymentMethod;
use App\Models\Payment;
use App\Models\PaymentSplit;
use App\Models\Schedule;
use App\Services\Pagarme\PagarmePaymentService;
use Carbon\Carbon;
use Illuminate\Database\Eloquent\Collection;
use Illuminate\Support\Str;

class PaymentService
{
    public function __construct(
        private readonly PagarmePaymentService $pagarmePaymentService,
    ) {}

    public function getAll(): Collection
    {
        return Payment::query()
            ->orderBy('created_at', 'desc')
            ->get();
    }

    public function findById(int $id): ?Payment
    {
        return Payment::find($id);
    }

    public function create(array $data): Payment
    {
        return Payment::create($data);
    }

    public function update(int $id, array $data): ?Payment
    {
        $model = $this->findById($id);

        if (! $model) {
            return null;
        }

        $model->update($data);

        return $model->fresh();
    }

    public function delete(int $id): bool
    {
        $model = $this->findById($id);

        if (! $model) {
            return false;
        }

        return $model->delete();
    }

    //

    public function payAcceptedSchedule(
        Schedule $schedule,
        string $paymentMethod,
        ?int $clientPaymentMethodId = null,
        array $options = []
    ): Payment {
        $schedule->loadMissing(['client', 'provider', 'customSchedule.serviceType']);

        if ($schedule->status !== 'accepted') {
            throw new \InvalidArgumentException('Agendamento precisa estar aceito para ser pago.');
        }

        if (! in_array($paymentMethod, ['credit_card', 'pix'], true)) {
            throw new \InvalidArgumentException('Forma de pagamento invalida.');
        }

        if (! $schedule->provider_id || ! $schedule->provider) {
            throw new \InvalidArgumentException('Agendamento precisa ter prestador confirmado para gerar pagamento.');
        }

        if ((float) $schedule->total_amount <= 0) {
            throw new \InvalidArgumentException('Agendamento precisa ter valor maior que zero para gerar pagamento.');
        }

        if (empty($schedule->provider->recipient_id)) {
            throw new \InvalidArgumentException('Prestador precisa ter recipient_id do Pagar.me para receber split.');
        }

        $existingPayment = Payment::query()
            ->where('schedule_id', $schedule->id)
            ->whereIn('status', [
                PaymentStatusEnum::PENDING->value,
                PaymentStatusEnum::PROCESSING->value,
                PaymentStatusEnum::AUTHORIZED->value,
                PaymentStatusEnum::PAID->value,
            ])
            ->latest('id')
            ->first();

        if ($existingPayment) {
            if ($this->isIncompleteGatewayPayment($existingPayment)) {
                $existingPayment->forceFill([
                    'status'          => PaymentStatusEnum::FAILED,
                    'failed_at'       => now(),
                    'failure_message' => 'Pagamento pendente sem retorno do gateway.',
                ])->save();
            } else {
                if ($existingPayment->payment_method !== $paymentMethod && $existingPayment->status !== PaymentStatusEnum::PAID) {
                    throw new \InvalidArgumentException('Ja existe um pagamento em andamento para este agendamento.');
                }

                $this->syncScheduleStatusAfterPayment($schedule, $existingPayment);

                return $existingPayment;
            }
        }

        $clientPaymentMethod = null;

        if ($paymentMethod === 'credit_card') {
            if (! $clientPaymentMethodId && empty($options['card_id'])) {
                throw new \InvalidArgumentException('Cartao de pagamento ou card_id e obrigatorio.');
            }

            if ($clientPaymentMethodId) {
                $clientPaymentMethod = ClientPaymentMethod::query()
                    ->where('client_id', $schedule->client_id)
                    ->where('id', $clientPaymentMethodId)
                    ->where('is_active', true)
                    ->first();

                if (! $clientPaymentMethod) {
                    throw new \InvalidArgumentException('Cartao de pagamento nao encontrado ou inativo para este cliente.');
                }
            }

            if (
                empty($clientPaymentMethod?->gateway_card_id)
                && empty($options['card_id'])
            ) {
                throw new \InvalidArgumentException('Cartao de pagamento invalido ou sem gateway_card_id do Pagar.me.');
            }
        }

        $serviceAmount = (float) $schedule->total_amount;
        $platformFee = round($serviceAmount * 0.11, 2);
        $grossAmount = round($serviceAmount + $platformFee, 2);
        $items = $this->buildOrderItems($schedule, $grossAmount);

        $this->ensureCustomerPhoneForPayment($schedule, $options);

        $customer = $this->buildCustomerPayload(schedule: $schedule, options: $options, requirePhone: true);

        $platformRecipientId = config('services.pagarme.platform_recipient_id');

        if ($platformFee > 0 && empty($platformRecipientId)) {
            throw new \InvalidArgumentException('PAGARME_PLATFORM_RECIPIENT_ID precisa estar configurado para receber a taxa da plataforma no split.');
        }

        $payment = Payment::create([
            'schedule_id'              => $schedule->id,
            'client_id'                => $schedule->client_id,
            'provider_id'              => $schedule->provider_id,
            'client_payment_method_id' => $paymentMethod === 'credit_card' ? $clientPaymentMethod->id : null,
            'gateway_provider'         => 'pagarme',
            'gateway_code'             => 'payment-'.(string) Str::uuid(),
            'payment_method'           => $paymentMethod,
            'status'                   => PaymentStatusEnum::PENDING,
            'gross_amount'             => $grossAmount,
            'gateway_fee_amount'       => 0,
            'platform_fee_amount'      => $platformFee,
            'net_amount'               => $grossAmount,
            'currency'                 => 'BRL',
            'installments'             => 1,
            'expires_at'               => $paymentMethod === 'pix' ? Carbon::now()->addMinutes(30) : null,

            'metadata' => [
                'service_amount' => number_format($serviceAmount, 2, '.', ''),
                'platform_fee'   => number_format($platformFee, 2, '.', ''),
            ],
        ]);

        $transfer = PaymentSplit::create([
            'payment_id'                        => $payment->id,
            'provider_id'                       => $schedule->provider_id,
            'gateway_provider'                  => 'pagarme',
            'gateway_transfer_target_reference' => $schedule->provider->recipient_id,
            'gateway_transfer_target_label'     => 'recipient',
            'status'                            => PaymentSplitStatusEnum::PENDING,
            'gross_amount'                      => $serviceAmount,
            'gateway_fee_amount'                => 0,
            'net_amount'                        => $serviceAmount,

            'metadata' => [
                'schedule_id' => (string) $schedule->id,
            ],
        ]);

        $split = $this->pagarmePaymentService->buildSplitFromTransfers(collect([$transfer]));

        if ($platformFee > 0) {
            $split[] = [
                'amount'       => $this->pagarmePaymentService->toGatewayAmountInCents($platformFee),
                'recipient_id' => $platformRecipientId,
                'type'         => 'flat',

                'options' => [
                    'charge_processing_fee' => true,
                    'charge_remainder_fee'  => true,
                    'liable'                => true,
                ],
            ];
        }

        $pixOptions = config('services.pagarme.pix_disable_split')
            ? []
            : ['split' => $split];

        try {
            $creditCardReference = $paymentMethod === 'credit_card'
                ? $this->resolveCreditCardReference($clientPaymentMethod, $options)
                : [];

            $orderResponse = $paymentMethod === 'credit_card'
                ? $this->pagarmePaymentService->createOrderWithCreditCard(
                    payment: $payment,
                    items: $items,
                    customer: $customer,
                    creditCard: [
                        'installments'         => 1,
                        'statement_descriptor' => Str::limit((string) config('app.name', 'SOFTPAR'), 13, ''),
                        'operation_type'       => 'auth_and_capture',
                    ] + $creditCardReference,
                    options: [
                        'split' => $split,
                    ],
                )
                : $this->pagarmePaymentService->createOrderWithPix(
                    payment: $payment,
                    items: $items,
                    customer: $customer,
                    pix: [
                        'expires_in'             => '1800',
                        'additional_information' => [
                            [
                                'name'  => 'Agendamento',
                                'value' => (string) $schedule->id,
                            ],
                        ],
                    ],
                    options: $pixOptions,
                );
        } catch (\Throwable $e) {
            $payment->forceFill([
                'status'          => PaymentStatusEnum::FAILED,
                'failed_at'       => now(),
                'failure_message' => $e->getMessage(),
            ])->save();

            $transfer->update(['status' => PaymentSplitStatusEnum::FAILED]);

            throw $e;
        }

        $payment = $this->pagarmePaymentService->applyGatewayResponseToPayment($payment, $orderResponse);

        $this->syncScheduleStatusAfterPayment($schedule, $payment);

        return $payment;
    }

    //

    private function buildOrderItems(Schedule $schedule, float $grossAmount): array
    {
        $description = $schedule->customSchedule?->serviceType?->description
            ?? "Servico {$schedule->id}";

        return [[
            'amount'      => $this->pagarmePaymentService->toGatewayAmountInCents($grossAmount),
            'description' => $description,
            'quantity'    => 1,
            'code'        => "schedule-{$schedule->id}",
        ]];
    }

    private function buildCustomerPayload(
        Schedule $schedule,
        array $options = [],
        bool $requirePhone = true
    ): array {
        $client = $schedule->client;
        $user = $client->user()->first(['id', 'name', 'email', 'phone']);
        $address = Address::with(['city.state', 'state'])->find($schedule->address_id);

        foreach ([
            'nome'      => $user?->name,
            'email'     => $user?->email,
            'documento' => $client->document,
        ] as $field => $value) {
            if ($value === null || $value === '') {
                throw new \InvalidArgumentException("Cliente precisa ter {$field} para criar pedido no Pagar.me.");
            }
        }

        if (! $address) {
            throw new \InvalidArgumentException('Endereco do agendamento nao encontrado para criar pedido no Pagar.me.');
        }

        $document = $this->digits($client->document);

        $phone = $this->buildPhonePayload($user->phone)
            ?: $this->buildPhonePayload($options['phone'] ?? null);

        $state = $address->state?->code ?? $address->city?->state?->code;
        $city = $address->city?->name;
        $zipCode = $this->digits($address->zip_code);

        $line1 = implode(', ', array_filter([
            $address->number ?: 'S/N',
            $address->address,
            $address->district,
        ]));

        $requiredFields = [
            'documento' => $document,
            'estado'    => $state,
            'cidade'    => $city,
            'cep'       => $zipCode,
            'endereco'  => $line1,
        ];

        if ($requirePhone) {
            $requiredFields['telefone'] = $phone;
        }

        foreach ($requiredFields as $field => $value) {
            if ($value === null || $value === '' || $value === []) {
                throw new \InvalidArgumentException("Cliente precisa ter {$field} valido para criar pedido no Pagar.me.");
            }
        }

        return [
            'name'          => $user->name,
            'email'         => $user->email,
            'code'          => "client-{$client->id}",
            'document'      => $document,
            'document_type' => strlen($document) === 14 ? 'CNPJ' : 'CPF',
            'type'          => strlen($document) === 14 ? 'company' : 'individual',

            'address' => [
                'country'  => 'BR',
                'state'    => $state,
                'city'     => $city,
                'zip_code' => $zipCode,
                'line_1'   => $line1,
                'line_2'   => $address->complement ?: $address->instructions,
            ],

            'phones' => $phone ? ['mobile_phone' => $phone] : null,
        ];
    }

    private function buildPhonePayload(?string $phone): ?array
    {
        $digits = $this->digits($phone);

        if (strlen($digits) < 10) {
            return null;
        }

        if (str_starts_with($digits, '55')) {
            $digits = substr($digits, 2);
        }

        return [
            'country_code' => '55',
            'area_code'    => substr($digits, 0, 2),
            'number'       => substr($digits, 2),
        ];
    }

    private function ensureCustomerPhoneForPayment(Schedule $schedule, array $options = []): void
    {
        $userPhone = $schedule->client?->user?->phone;
        $phone = $this->buildPhonePayload($userPhone)
            ?: $this->buildPhonePayload($options['phone'] ?? null);

        if ($phone) {
            return;
        }

        throw new \InvalidArgumentException(
            'Voce precisa cadastrar um numero de celular valido no seu perfil para concluir o pagamento.'
        );
    }

    private function digits(?string $value): string
    {
        return preg_replace('/\D+/', '', (string) $value) ?? '';
    }

    private function isIncompleteGatewayPayment(Payment $payment): bool
    {
        return $payment->status === PaymentStatusEnum::PENDING
            && empty($payment->gateway_entity_reference)
            && empty($payment->gateway_operation_reference)
            && empty($payment->gateway_payload);
    }

    private function resolveCreditCardReference(?ClientPaymentMethod $clientPaymentMethod, array $options): array
    {
        if (! empty($options['card_id'])) {
            return ['card_id' => $options['card_id']];
        }

        if (! empty($clientPaymentMethod?->gateway_card_id)) {
            return ['card_id' => $clientPaymentMethod->gateway_card_id];
        }

        throw new \InvalidArgumentException('Cartao de pagamento precisa ter gateway_card_id do Pagar.me.');
    }

    public function syncScheduleStatusAfterPayment(Schedule $schedule, Payment $payment): void
    {
        if ($payment->status !== PaymentStatusEnum::PAID || $schedule->status === 'paid') {
            return;
        }

        $schedule->update(['status' => 'paid']);
    }
}