<?php

namespace App\Libraries\DigitMotor;

use App\Models\MotorApiLogModel;
use Config\DigitMotor as DigitMotorConfig;

/**
 * Thin HTTP client for Digit OneAPI executor calls.
 */
class DigitApiClient
{
    protected DigitMotorConfig $config;
    protected DigitAuthClient $authClient;
    protected MotorApiLogModel $logModel;

    public function __construct(?DigitMotorConfig $config = null, ?DigitAuthClient $authClient = null)
    {
        $this->config     = $config ?? config('DigitMotor');
        $this->authClient = $authClient ?? new DigitAuthClient($this->config);
        $this->logModel   = new MotorApiLogModel();
        helper('api');
    }

    /**
     * POST to Digit executor (or arbitrary path under baseUrl).
     *
     * @throws DigitApiException
     */
    public function post(string $path, array $payload, ?string $integrationId = null, ?int $quoteId = null): array
    {
        return $this->request('POST', $path, $payload, $integrationId, $quoteId, false);
    }

    /**
     * @throws DigitApiException
     */
    protected function request(
        string $method,
        string $path,
        array $payload,
        ?string $integrationId,
        ?int $quoteId,
        bool $isRetry
    ): array {
        $token = $this->authClient->getToken($isRetry);
        $url   = $this->config->baseUrl . $path;

        $headers = [
            'Content-Type: application/json',
            'Authorization: Bearer ' . $token,
        ];
        if ($integrationId) {
            $headers[] = 'integrationId: ' . $integrationId;
        }

        $started = microtime(true);
        $response = call_third_party_api($url, $method, $headers, $payload);
        $durationMs = (int) round((microtime(true) - $started) * 1000);

        $httpCode = (int) ($response['code'] ?? 0);
        $data     = $response['data'] ?? [];
        if (is_string($data)) {
            $decoded = json_decode($data, true);
            $data = is_array($decoded) ? $decoded : ['raw' => $data];
        }

        $digitCode = $this->extractDigitCode($data, $httpCode);

        $this->writeLog($quoteId, $integrationId, $path, $payload, $data, $httpCode, $digitCode, $durationMs);

        // Stale token — refresh once and retry
        if (!$isRetry && ($httpCode === 401 || (string) $digitCode === '401')) {
            $this->authClient->refreshToken();
            return $this->request($method, $path, $payload, $integrationId, $quoteId, true);
        }

        if ($this->isHardFail($httpCode, $digitCode, $response['status'] ?? false, $data)) {
            $message = $this->extractMessage($data, $httpCode);
            throw new DigitApiException(
                $message,
                $digitCode,
                $httpCode,
                $data,
                null,
                $url,
                $this->redact($payload)
            );
        }

        return is_array($data) ? $data : [];
    }

    protected function isHardFail(int $httpCode, $digitCode, bool $httpOk, $data): bool
    {
        $code = (string) $digitCode;
        if (in_array($code, ['403', '999', '400', '500'], true)) {
            return true;
        }
        if ($httpCode >= 400) {
            return true;
        }
        if (!$httpOk) {
            return true;
        }
        // Digit sometimes returns 200 with error object
        if (is_array($data) && isset($data['error']) && !isset($data['grossPremium']) && !isset($data['premium']) && !isset($data['quoteNumber'])) {
            $errCode = $data['error']['errorCode']
                ?? $data['error']['code']
                ?? $data['code']
                ?? $data['statusCode']
                ?? null;
            if ($errCode !== null && (string) $errCode !== '0' && strtoupper((string) $errCode) !== 'SUCCESS') {
                return true;
            }
            // validationMessages without a success payload
            if (!empty($data['error']['validationMessages'])) {
                return true;
            }
        }
        return false;
    }

    protected function extractDigitCode($data, int $httpCode)
    {
        if (!is_array($data)) {
            return $httpCode ?: null;
        }
        return $data['error']['errorCode']
            ?? $data['error']['code']
            ?? $data['code']
            ?? $data['errorCode']
            ?? $data['responseCode']
            ?? $data['statusCode']
            ?? ($httpCode >= 400 ? (string) $httpCode : null);
    }

    protected function extractMessage($data, int $httpCode): string
    {
        if (!is_array($data)) {
            return 'Digit API request failed (HTTP ' . $httpCode . ').';
        }

        // Digit often returns validationMessages[] instead of a single message
        $validation = $data['error']['validationMessages'] ?? $data['validationMessages'] ?? null;
        if (is_array($validation) && $validation) {
            $parts = [];
            foreach ($validation as $item) {
                if (is_string($item) && trim($item) !== '') {
                    $parts[] = trim($item);
                } elseif (is_array($item)) {
                    $parts[] = trim((string) ($item['message'] ?? json_encode($item)));
                }
            }
            if ($parts) {
                return implode(' | ', $parts);
            }
        }

        $msg = $data['error']['message']
            ?? $data['message']
            ?? $data['errorMessage']
            ?? $data['responseMessage']
            ?? $data['statusMessage']
            ?? null;
        if (is_array($msg)) {
            $msg = implode(' | ', array_map('strval', $msg));
        }
        return $msg ?: 'Digit API request failed (HTTP ' . $httpCode . ').';
    }

    protected function writeLog(
        ?int $quoteId,
        ?string $integrationId,
        string $endpoint,
        array $requestBody,
        $responseBody,
        int $httpStatus,
        $errorCode,
        int $durationMs
    ): void {
        try {
            $this->logModel->insert([
                'quote_id'       => $quoteId,
                'integration_id' => $integrationId,
                'endpoint'       => $endpoint,
                'request_body'   => json_encode($this->redact($requestBody)),
                'response_body'  => json_encode($this->redact(is_array($responseBody) ? $responseBody : ['raw' => $responseBody])),
                'http_status'    => $httpStatus,
                'error_code'     => $errorCode !== null ? (string) $errorCode : null,
                'duration_ms'    => $durationMs,
            ]);
        } catch (\Throwable $e) {
            log_message('error', 'DigitMotor API log write failed: ' . $e->getMessage());
        }
    }

    protected function redact(array $data): array
    {
        $sensitive = ['password', 'access_token', 'refresh_token', 'Authorization', 'authorization'];
        $out = [];
        foreach ($data as $key => $value) {
            if (in_array((string) $key, $sensitive, true)) {
                $out[$key] = '***REDACTED***';
            } elseif (is_array($value)) {
                $out[$key] = $this->redact($value);
            } else {
                $out[$key] = $value;
            }
        }
        return $out;
    }
}