<?php

namespace Controllers;

use Libs\ResponseLib;
use Models\OrderbookModel;
use Models\OrderbookTransferModel;
use Models\PaymentModel;
use Models\WalletModel;
use Psr\Http\Message\ServerRequestInterface;
use Respect\Validation\Exceptions\ValidationException;
use Respect\Validation\Validator as val;
use Services\TokenTransferService;

class OrderbookTransferController
{
    private PaymentModel $paymentModel;
    private WalletModel $walletModel;
    private OrderbookTransferModel $orderbookTransferModel;
    private TokenTransferService $tokenTransferService;

    public function __construct()
    {
        $this->paymentModel = new PaymentModel();
        $this->walletModel = new WalletModel();
        $this->orderbookTransferModel = new OrderbookTransferModel();
        $this->tokenTransferService = new TokenTransferService();
    }

    public function __invoke(ServerRequestInterface $request)
    {
        $body = json_decode((string)$request->getBody(), true) ?? [];

        try {
            val::key('external_id', val::stringType()->notEmpty())
                ->key('token_external_id', val::stringType()->notEmpty())
                ->assert($body);
        } catch (ValidationException $e) {
            return ResponseLib::sendFail('Validation failed: ' . $e->getFullMessage(), [], 'E_VALIDATE')->withStatus(400);
        }

        $externalId = trim((string)$body['external_id']);
        $tokenExternalId = trim((string)$body['token_external_id']);
        $companyId = (int)($request->getAttribute('api_company_id') ?? 0);

        if ($companyId <= 0) {
            return ResponseLib::sendFail('Empresa autenticada não encontrada', [], 'E_VALIDATE')->withStatus(401);
        }

        try {
            $payment = $this->paymentModel->findByExternalId($externalId);
        } catch (\Throwable $e) {
            return ResponseLib::sendFail('Falha ao consultar pagamento: ' . $e->getMessage(), [], 'E_DATABASE')->withStatus(500);
        }

        if (!$payment) {
            return ResponseLib::sendFail('Pagamento não encontrado', ['external_id' => $externalId], 'E_NOT_FOUND')->withStatus(404);
        }

        if ((int)$payment['status_id'] !== PaymentModel::STATUS_COMPLETED) {
            return ResponseLib::sendFail('Pagamento ainda não concluído', ['external_id' => $externalId, 'status_id' => $payment['status_id']], 'E_PAYMENT_PENDING')->withStatus(409);
        }

        try {
            $orderbook = $this->orderbookTransferModel->getByTokenExternalId($tokenExternalId);
        } catch (\Throwable $e) {
            return ResponseLib::sendFail('Falha ao consultar orderbook: ' . $e->getMessage(), [], 'E_DATABASE')->withStatus(500);
        }

        if (!$orderbook) {
            return ResponseLib::sendFail('Orderbook não encontrado', ['token_external_id' => $tokenExternalId], 'E_NOT_FOUND')->withStatus(404);
        }

        if ((int)$orderbook['company_id'] !== $companyId) {
            return ResponseLib::sendFail('Orderbook não pertence à empresa autenticada', [], 'E_FORBIDDEN')->withStatus(403);
        }

        if ((int)$orderbook['status_id'] === OrderbookModel::STATUS_COMPLETED) {
            return ResponseLib::sendOk([
                'orderbook_id' => (int)$orderbook['orderbook_id'],
                'token_external_id' => $tokenExternalId,
                'message' => 'Orderbook já transferido anteriormente',
            ], 'S_TOKEN_ALREADY_TRANSFERRED');
        }

        try {
            $wallet = $this->walletModel->getPrimaryWalletByCompanyId($companyId);
        } catch (\Throwable $e) {
            return ResponseLib::sendFail('Falha ao consultar carteira da empresa: ' . $e->getMessage(), [], 'E_DATABASE')->withStatus(500);
        }

        if (!$wallet || empty($wallet['wallet_address'])) {
            return ResponseLib::sendFail('Carteira da empresa não encontrada', [], 'E_WALLET_NOT_FOUND')->withStatus(404);
        }

        $serverAddress = $this->resolveServerAddress();

        try {
            $transferResult = $this->tokenTransferService->transferFrom($serverAddress, (string)$wallet['wallet_address'], $tokenExternalId);
            $this->orderbookTransferModel->markCompleted((int)$orderbook['orderbook_id']);
        } catch (\Throwable $e) {
            return ResponseLib::sendFail('Falha ao transferir token: ' . $e->getMessage(), [], 'E_TRANSFER')->withStatus(500);
        }

        return ResponseLib::sendOk([
            'orderbook_id' => (int)$orderbook['orderbook_id'],
            'token_external_id' => $tokenExternalId,
            'destination_address' => (string)$wallet['wallet_address'],
            'transfer_output' => $transferResult['output'] ?? '',
            'transfer_error' => $transferResult['error'] ?? '',
        ], 'S_TOKEN_TRANSFERRED');
    }

    private function resolveServerAddress(): string
    {
        $address = $_ENV['SERVER_WALLET_ADDRESS'] ?? $_ENV['EASY_ADMIM_PUBLIC_KEY'] ?? '';
        $trimmed = trim((string)$address);
        if ($trimmed === '') {
            throw new \RuntimeException('Endereço do servidor (SERVER_WALLET_ADDRESS) não configurado.');
        }

        return $trimmed;
    }
}