<?php

namespace Alexr\Services\Whatsapp;

use Exception;

class WhatsappApiException extends Exception
{
	protected string $errorCode;
	protected int $httpStatusCode;
	protected array $context;

	public function __construct(
		string $message = '',
		string $errorCode = 'unknown_error',
		int $httpStatusCode = 0,
		array $context = [],
		?Exception $previous = null
	) {
		parent::__construct($message, 0, $previous);

		$this->errorCode = $errorCode;
		$this->httpStatusCode = $httpStatusCode;
		$this->context = $context;
	}

	/**
	 * Get the error code
	 */
	public function getErrorCode(): string
	{
		return $this->errorCode;
	}

	/**
	 * Get the HTTP status code
	 */
	public function getHttpStatusCode(): int
	{
		return $this->httpStatusCode;
	}

	/**
	 * Get additional context
	 */
	public function getContext(): array
	{
		return $this->context;
	}

	/**
	 * Create from API response
	 */
	public static function fromResponse(WhatsappApiResponse $response): static
	{
		return new static(
			message: $response->getErrorMessage() ?? 'Unknown API error',
			errorCode: $response->error ?? 'api_error',
			httpStatusCode: $response->statusCode,
			context: $response->raw
		);
	}

	/**
	 * Create insufficient credits exception
	 */
	public static function insufficientCredits(int $available, int $needed): static
	{
		return new static(
			message: "Insufficient credits. Available: {$available}, Needed: {$needed}",
			errorCode: 'insufficient_credits',
			httpStatusCode: 402,
			context: [
				'credits_available' => $available,
				'credits_needed' => $needed
			]
		);
	}

	/**
	 * Create unauthorized exception
	 */
	public static function unauthorized(): static
	{
		return new static(
			message: 'Invalid or missing API token',
			errorCode: 'unauthorized',
			httpStatusCode: 401
		);
	}

	/**
	 * Create template not found exception
	 */
	public static function templateNotFound(string $template, string $language): static
	{
		return new static(
			message: "Template '{$template}' with language '{$language}' not found",
			errorCode: 'template_not_found',
			httpStatusCode: 404,
			context: [
				'template' => $template,
				'language' => $language
			]
		);
	}

	/**
	 * Create service not configured exception
	 */
	public static function serviceNotConfigured(): static
	{
		return new static(
			message: 'WhatsApp service is not configured. Please check your settings.',
			errorCode: 'service_not_configured',
			httpStatusCode: 0
		);
	}

	/**
	 * Create connection failed exception
	 */
	public static function connectionFailed(string $reason = ''): static
	{
		return new static(
			message: 'Failed to connect to WhatsApp API' . ($reason ? ": {$reason}" : ''),
			errorCode: 'connection_failed',
			httpStatusCode: 0,
			context: ['reason' => $reason]
		);
	}
}