<?php

namespace App\Services;

use App\Enums\PaymentSplitStatusEnum;
use App\Enums\PaymentStatusEnum;
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()
            ->with(['client.user', 'provider.user'])
            ->orderBy('created_at', 'desc')
            ->get();
    }

    public function findById(int $id): ?Payment
    {
        return Payment::query()
            ->with(['client.user', 'provider.user'])
            ->find($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 platformFees(): array
    {
        return $this->pagarmePaymentService->platformFeeRates();
    }

    //

    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)) {
                $existingPayment->forceFill([
                    'status'          => PaymentStatusEnum::FAILED,
                    'failed_at'       => now(),
                    'failure_message' => 'Pagamento pendente sem retorno do gateway.',
                ])->save();
            } elseif ($this->isExpiredPixPayment($existingPayment)) {
                $existingPayment->forceFill([
                    'status'          => PaymentStatusEnum::FAILED,
                    'failed_at'       => now(),
                    'failure_message' => 'Pagamento Pix expirado.',
                ])->save();

                PaymentSplit::query()
                    ->where('payment_id', $existingPayment->id)
                    ->update(['status' => PaymentSplitStatusEnum::FAILED]);
            } else {
                if ($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;

        $cardId = 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.');
                }
            }

            $cardId = $options['card_id'] ?? $clientPaymentMethod?->gateway_card_id ?? null;

            if (empty($cardId)) {
                throw new \InvalidArgumentException('Cartao de pagamento invalido ou sem gateway_card_id do Pagar.me.');
            }
        }

        $serviceAmount = (float) $schedule->total_amount;

        $amounts = $this->pagarmePaymentService->calculatePaymentAmounts(
            serviceAmount: $serviceAmount,
            paymentMethod: $paymentMethod,
        );

        $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) : null,
            'gateway_provider'         => 'pagarme',
            'gateway_code'             => 'payment-'.(string) Str::uuid(),
            'payment_method'           => $paymentMethod,
            'status'                   => PaymentStatusEnum::PENDING,
            'gross_amount'             => $amounts['gross_amount'],
            'gateway_fee_amount'       => 0,
            'platform_fee_amount'      => $amounts['platform_fee_amount'],
            'net_amount'               => $amounts['gross_amount'],
            'currency'                 => 'BRL',
            'installments'             => 1,
            'expires_at'               => $paymentMethod === 'pix' ? Carbon::now()->addMinutes(30) : null,

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

        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,
            ],
        ]);

        $schedule->ensureCustomerPhone($options['phone'] ?? null);

        try {
            $orderResponse = $this->pagarmePaymentService->processPayment(
                payment: $payment,
                schedule: $schedule,
                paymentMethod: $paymentMethod,
                cardId: $cardId,
                options: $options,
            );
        } catch (\Throwable $e) {
            $payment->forceFill([
                'status'          => PaymentStatusEnum::FAILED,
                'failed_at'       => now(),
                'failure_message' => $e->getMessage(),
            ])->save();

            PaymentSplit::query()
                ->where('payment_id', $payment->id)
                ->update(['status' => PaymentSplitStatusEnum::FAILED]);

            throw $e;
        }

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

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

        return $payment;
    }

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

        if ($existingPayment && $this->isExpiredPixPayment($existingPayment)) {
            $existingPayment->forceFill([
                'status'          => PaymentStatusEnum::FAILED,
                'failed_at'       => Carbon::now(),
                'failure_message' => 'Pagamento Pix expirado.',
            ])->save();

            PaymentSplit::query()
                ->where('payment_id', $existingPayment->id)
                ->update(['status' => PaymentSplitStatusEnum::FAILED]);

            $existingPayment = null;
        }

        if ($existingPayment) {
            if ($this->isIncompleteGatewayPayment($existingPayment)) {
                $existingPayment->forceFill([
                    'status'          => PaymentStatusEnum::FAILED,
                    'failed_at'       => Carbon::now(),
                    'failure_message' => 'Pagamento pendente sem retorno do gateway.',
                ])->save();

                PaymentSplit::query()
                    ->where('payment_id', $existingPayment->id)
                    ->update(['status' => PaymentSplitStatusEnum::FAILED]);
            } else {
                $this->syncScheduleStatusAfterPayment($schedule, $existingPayment);

                return $existingPayment;
            }
        }

        return $this->payAcceptedSchedule(
            schedule: $schedule,
            paymentMethod: 'pix',
        );
    }

    //

    private function isExpiredPixPayment(Payment $payment): bool
    {
        if ($payment->payment_method !== 'pix') {
            return false;
        }

        if ($payment->status === PaymentStatusEnum::PAID) {
            return false;
        }

        return $payment->expires_at !== null
            && $payment->expires_at->isPast();
    }

    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);
    }

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

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