<?php

declare(strict_types=1);

namespace SixShop\Wangdian\Tests\Unit\Response;

use PHPUnit\Framework\TestCase;
use SixShop\Wangdian\Exception\ApiException;
use SixShop\Wangdian\Response\ApiResponse;
use SixShop\Wangdian\Response\ResponseHandler;

class ResponseHandlerTest extends TestCase
{
    private ResponseHandler $handler;

    protected function setUp(): void
    {
        $this->handler = new ResponseHandler();
    }

    public function testHandleSuccess(): void
    {
        $responseData = [
            'code' => 0,
            'message' => 'Success',
            'data' => ['result' => 'test']
        ];

        $response = $this->handler->handle($responseData);

        $this->assertInstanceOf(ApiResponse::class, $response);
        $this->assertTrue($response->isSuccess());
        $this->assertEquals(0, $response->getCode());
        $this->assertEquals('Success', $response->getMessage());
        $this->assertEquals(['result' => 'test'], $response->getData());
    }

    public function testIsSuccessWithZeroCode(): void
    {
        $responseData = ['code' => 0];
        
        $this->assertTrue($this->handler->isSuccess($responseData));
    }

    public function testIsSuccessWithStringZeroCode(): void
    {
        $responseData = ['code' => '0'];
        
        $this->assertTrue($this->handler->isSuccess($responseData));
    }

    public function testIsSuccessWithNonZeroCode(): void
    {
        $responseData = ['code' => 1];
        
        $this->assertFalse($this->handler->isSuccess($responseData));
    }

    public function testIsSuccessWithMissingCode(): void
    {
        $responseData = ['message' => 'Some message'];
        
        $this->assertFalse($this->handler->isSuccess($responseData));
    }

    public function testExtractErrorFromSuccessResponse(): void
    {
        $responseData = [
            'code' => 0,
            'message' => 'Success'
        ];

        $error = $this->handler->extractError($responseData);

        $this->assertNull($error);
    }

    public function testExtractErrorFromErrorResponse(): void
    {
        $responseData = [
            'code' => 1001,
            'message' => 'Authentication failed',
            'data' => ['error_detail' => 'Invalid token']
        ];

        $error = $this->handler->extractError($responseData);

        $this->assertIsArray($error);
        $this->assertEquals(1001, $error['code']);
        $this->assertEquals('Authentication failed', $error['message']);
        $this->assertEquals(['error_detail' => 'Invalid token'], $error['data']);
    }

    public function testExtractErrorWithMsgField(): void
    {
        $responseData = [
            'code' => 404,
            'msg' => 'Resource not found'
        ];

        $error = $this->handler->extractError($responseData);

        $this->assertIsArray($error);
        $this->assertEquals(404, $error['code']);
        $this->assertEquals('Resource not found', $error['message']);
        $this->assertNull($error['data']);
    }

    public function testExtractErrorWithMissingFields(): void
    {
        $responseData = [];

        $error = $this->handler->extractError($responseData);

        $this->assertIsArray($error);
        $this->assertEquals('unknown', $error['code']);
        $this->assertEquals('Unknown error', $error['message']);
        $this->assertNull($error['data']);
    }

    public function testValidateOrThrowWithSuccessResponse(): void
    {
        $responseData = [
            'code' => 0,
            'message' => 'Success'
        ];

        // Should not throw any exception
        $this->handler->validateOrThrow($responseData);
        $this->assertTrue(true); // Assert that we reach this point
    }

    public function testValidateOrThrowWithErrorResponse(): void
    {
        $responseData = [
            'code' => 1001,
            'message' => 'Authentication failed',
            'data' => ['error_detail' => 'Invalid token']
        ];

        $this->expectException(ApiException::class);
        $this->expectExceptionMessage('Authentication failed');

        $this->handler->validateOrThrow($responseData);
    }

    public function testValidateOrThrowWithApiException(): void
    {
        $responseData = [
            'code' => 500,
            'message' => 'Internal server error'
        ];

        try {
            $this->handler->validateOrThrow($responseData);
            $this->fail('Expected ApiException was not thrown');
        } catch (ApiException $e) {
            $this->assertEquals('Internal server error', $e->getMessage());
            $this->assertEquals('500', $e->getApiCode());
            $this->assertEquals($responseData, $e->getResponseData());
        }
    }

    public function testValidateOrThrowWithMsgField(): void
    {
        $responseData = [
            'code' => 400,
            'msg' => 'Bad request'
        ];

        $this->expectException(ApiException::class);
        $this->expectExceptionMessage('Bad request');

        $this->handler->validateOrThrow($responseData);
    }

    public function testValidateOrThrowWithMissingMessage(): void
    {
        $responseData = [
            'code' => 999
        ];

        $this->expectException(ApiException::class);
        $this->expectExceptionMessage('Unknown error');

        $this->handler->validateOrThrow($responseData);
    }

    public function testHandleAndValidateWorkflow(): void
    {
        $successData = [
            'code' => 0,
            'message' => 'Operation completed',
            'data' => ['id' => 123]
        ];

        // Handle should work
        $response = $this->handler->handle($successData);
        $this->assertInstanceOf(ApiResponse::class, $response);

        // Validate should not throw
        $this->handler->validateOrThrow($successData);
        $this->assertTrue(true);

        $errorData = [
            'code' => 404,
            'message' => 'Not found'
        ];

        // Handle should still work
        $errorResponse = $this->handler->handle($errorData);
        $this->assertInstanceOf(ApiResponse::class, $errorResponse);
        $this->assertFalse($errorResponse->isSuccess());

        // Validate should throw
        $this->expectException(ApiException::class);
        $this->handler->validateOrThrow($errorData);
    }
}