<?php

declare(strict_types=1);

namespace Clawdforge\Tests;

use Clawdforge\AppToken;
use Clawdforge\Client;
use Clawdforge\Exception\ApiException;
use Clawdforge\Exception\AuthException;
use Clawdforge\Exception\ForgeException;
use Clawdforge\Exception\TransportException;
use Clawdforge\FileToken;
use Clawdforge\RunRequest;
use Clawdforge\RunResult;
use GuzzleHttp\Client as GuzzleClient;
use GuzzleHttp\Exception\ConnectException;
use GuzzleHttp\Handler\MockHandler;
use GuzzleHttp\HandlerStack;
use GuzzleHttp\Middleware;
use GuzzleHttp\Psr7\Request;
use GuzzleHttp\Psr7\Response;
use InvalidArgumentException;
use PHPUnit\Framework\TestCase;

final class ClientTest extends TestCase
{
    private const BASE_URL = 'http://localhost:8800';
    private const TOKEN = 'cf_test_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx';

    /**
     * @param list<Response|\Throwable> $responses
     * @param array<int, array{0: \Psr\Http\Message\RequestInterface, 1: array<string, mixed>}> $history captured (request, options) pairs
     */
    private function makeClient(array $responses, array &$history = []): Client
    {
        $mock = new MockHandler($responses);
        $stack = HandlerStack::create($mock);
        $stack->push(Middleware::history($history));
        $guzzle = new GuzzleClient(['handler' => $stack, 'http_errors' => false]);

        return new Client(self::BASE_URL, self::TOKEN, $guzzle);
    }

    public function testHealthzReturnsDecodedJson(): void
    {
        $history = [];
        $client = $this->makeClient([
            new Response(200, ['Content-Type' => 'application/json'], (string) json_encode([
                'ok' => true,
                'claude_present' => true,
                'claude_version' => '1.2.3',
            ])),
        ], $history);

        $health = $client->healthz();

        self::assertTrue($health['ok']);
        self::assertSame('1.2.3', $health['claude_version']);
        self::assertCount(1, $history);
        /** @var \Psr\Http\Message\RequestInterface $req */
        $req = $history[0]['request'];
        self::assertSame('GET', $req->getMethod());
        self::assertSame('/healthz', $req->getUri()->getPath());
        self::assertSame('Bearer ' . self::TOKEN, $req->getHeaderLine('Authorization'));
    }

    public function testRunSuccessJsonResult(): void
    {
        $history = [];
        $client = $this->makeClient([
            new Response(200, ['Content-Type' => 'application/json'], (string) json_encode([
                'ok' => true,
                'result' => ['hello' => 'world'],
                'duration_ms' => 1234,
                'stop_reason' => 'end_turn',
            ])),
        ], $history);

        $r = $client->run(new RunRequest(prompt: 'Reply with JSON: {"hello": "world"}'));

        self::assertInstanceOf(RunResult::class, $r);
        self::assertTrue($r->ok);
        self::assertIsArray($r->result);
        self::assertSame(['hello' => 'world'], $r->result);
        self::assertSame(1234, $r->durationMs);
        self::assertSame('end_turn', $r->stopReason);

        /** @var \Psr\Http\Message\RequestInterface $req */
        $req = $history[0]['request'];
        $sentBody = json_decode((string) $req->getBody(), true);
        self::assertIsArray($sentBody);
        self::assertSame('Reply with JSON: {"hello": "world"}', $sentBody['prompt']);
        self::assertSame('sonnet', $sentBody['model']); // default
        self::assertArrayNotHasKey('system', $sentBody);
        self::assertArrayNotHasKey('files', $sentBody);
        self::assertArrayNotHasKey('timeout_secs', $sentBody);
    }

    public function testRunSuccessStringResult(): void
    {
        $client = $this->makeClient([
            new Response(200, [], (string) json_encode([
                'ok' => true,
                'result' => 'plain text reply',
                'duration_ms' => 800,
                'stop_reason' => 'end_turn',
            ])),
        ]);

        $r = $client->run(new RunRequest(prompt: 'hi'));

        self::assertIsString($r->result);
        self::assertSame('plain text reply', $r->result);
    }

    public function testRunSendsExpectedBodyWithAllFields(): void
    {
        $history = [];
        $client = $this->makeClient([
            new Response(200, [], (string) json_encode([
                'ok' => true, 'result' => 'x', 'duration_ms' => 1, 'stop_reason' => 'end_turn',
            ])),
        ], $history);

        $client->run(new RunRequest(
            prompt: 'hi',
            model: 'opus',
            system: 'be terse',
            files: ['ff_abc'],
            timeoutSecs: 42,
        ));

        /** @var \Psr\Http\Message\RequestInterface $req */
        $req = $history[0]['request'];
        $sent = json_decode((string) $req->getBody(), true);
        self::assertSame([
            'prompt' => 'hi',
            'model' => 'opus',
            'system' => 'be terse',
            'files' => ['ff_abc'],
            'timeout_secs' => 42,
        ], $sent);
    }

    public function testRun502RaisesApiExceptionWithDecodedEnvelope(): void
    {
        $client = $this->makeClient([
            new Response(502, [], (string) json_encode([
                'ok' => false,
                'error' => 'subprocess timed out',
                'stderr' => '...',
                'duration_ms' => 60000,
                'stop_reason' => 'timeout',
            ])),
        ]);

        try {
            $client->run(new RunRequest(prompt: 'hi', timeoutSecs: 60));
            self::fail('expected ApiException');
        } catch (ApiException $e) {
            self::assertSame(502, $e->statusCode);
            self::assertNotNull($e->decoded);
            self::assertSame('timeout', $e->decoded['stop_reason']);
            self::assertStringContainsString('subprocess timed out', $e->getMessage());
            self::assertInstanceOf(ForgeException::class, $e);
        }
    }

    public function testRun401RaisesAuthException(): void
    {
        $client = $this->makeClient([
            new Response(401, [], (string) json_encode(['detail' => 'missing bearer'])),
        ]);

        try {
            $client->run(new RunRequest(prompt: 'hi'));
            self::fail('expected AuthException');
        } catch (AuthException $e) {
            self::assertSame(401, $e->statusCode);
            self::assertInstanceOf(ApiException::class, $e);
            self::assertInstanceOf(ForgeException::class, $e);
        }
    }

    public function testRunTransportErrorWraps(): void
    {
        $client = $this->makeClient([
            new ConnectException('Connection refused', new Request('POST', self::BASE_URL . '/run')),
        ]);

        $this->expectException(TransportException::class);
        $client->run(new RunRequest(prompt: 'hi'));
    }

    public function testRunRejectsEmptyPromptLocally(): void
    {
        $this->expectException(InvalidArgumentException::class);
        new RunRequest(prompt: '');
    }

    public function testUploadFileFromPath(): void
    {
        $history = [];
        $client = $this->makeClient([
            new Response(200, [], (string) json_encode([
                'file_token' => 'ff_abc123',
                'ttl_secs' => 3600,
                'size' => 11,
            ])),
        ], $history);

        $tmp = tempnam(sys_get_temp_dir(), 'cf_');
        self::assertNotFalse($tmp);
        file_put_contents($tmp, 'hello world');

        try {
            $ft = $client->uploadFile($tmp, 3600);
        } finally {
            @unlink($tmp);
        }

        self::assertInstanceOf(FileToken::class, $ft);
        self::assertSame('ff_abc123', $ft->fileToken);
        self::assertSame(3600, $ft->ttlSecs);
        self::assertSame(11, $ft->size);

        /** @var \Psr\Http\Message\RequestInterface $req */
        $req = $history[0]['request'];
        self::assertSame('POST', $req->getMethod());
        self::assertSame('/files', $req->getUri()->getPath());
        self::assertStringStartsWith('multipart/form-data', $req->getHeaderLine('Content-Type'));
        // Multipart body should mention both fields by name.
        $body = (string) $req->getBody();
        self::assertStringContainsString('name="ttl_secs"', $body);
        self::assertStringContainsString('name="file"', $body);
    }

    public function testCreateTokenRoundTrip(): void
    {
        $history = [];
        $client = $this->makeClient([
            new Response(200, [], (string) json_encode([
                'name' => 'cauldron',
                'token' => 'cf_brandnew_xxx',
                'ip_cidrs' => ['172.24.0.0/16'],
            ])),
        ], $history);

        $t = $client->createToken('cauldron', ['172.24.0.0/16']);

        self::assertInstanceOf(AppToken::class, $t);
        self::assertSame('cauldron', $t->name);
        self::assertSame('cf_brandnew_xxx', $t->token);
        self::assertSame(['172.24.0.0/16'], $t->ipCidrs);

        /** @var \Psr\Http\Message\RequestInterface $req */
        $req = $history[0]['request'];
        $sent = json_decode((string) $req->getBody(), true);
        self::assertSame(['name' => 'cauldron', 'ip_cidrs' => ['172.24.0.0/16']], $sent);
    }

    public function testListTokensNormalizesCommaJoinedCidrsAndEnabledFlag(): void
    {
        $client = $this->makeClient([
            new Response(200, [], (string) json_encode([
                'tokens' => [
                    [
                        'name' => 'cauldron',
                        'ip_cidrs' => '172.24.0.0/16',
                        'created_at' => 100,
                        'last_used' => 200,
                        'enabled' => 1,
                    ],
                    [
                        'name' => 'petalparse',
                        'ip_cidrs' => '',
                        'created_at' => 50,
                        'last_used' => null,
                        'enabled' => 0,
                    ],
                ],
            ])),
        ]);

        $toks = $client->listTokens();

        self::assertCount(2, $toks);
        self::assertSame('cauldron', $toks[0]->name);
        self::assertSame(['172.24.0.0/16'], $toks[0]->ipCidrs);
        self::assertTrue($toks[0]->enabled);
        self::assertNull($toks[0]->token); // never returned on list
        self::assertSame(200, $toks[0]->lastUsed);

        self::assertSame([], $toks[1]->ipCidrs);
        self::assertFalse($toks[1]->enabled);
        self::assertNull($toks[1]->lastUsed);
    }

    public function testRevokeTokenReturnsTrueOnOk(): void
    {
        $history = [];
        $client = $this->makeClient([
            new Response(200, [], (string) json_encode(['ok' => true])),
        ], $history);

        self::assertTrue($client->revokeToken('cauldron'));

        /** @var \Psr\Http\Message\RequestInterface $req */
        $req = $history[0]['request'];
        self::assertSame('DELETE', $req->getMethod());
        self::assertSame('/admin/tokens/cauldron', $req->getUri()->getPath());
    }

    public function testRevokeTokenMissingRaises404(): void
    {
        $client = $this->makeClient([
            new Response(404, [], (string) json_encode(['detail' => 'no such token'])),
        ]);

        try {
            $client->revokeToken('nosuch');
            self::fail('expected ApiException');
        } catch (ApiException $e) {
            self::assertSame(404, $e->statusCode);
        }
    }

    public function testConstructorRequiresBaseUrl(): void
    {
        $this->expectException(InvalidArgumentException::class);
        new Client('', 'cf_x');
    }

    public function testConstructorRequiresToken(): void
    {
        $this->expectException(InvalidArgumentException::class);
        new Client(self::BASE_URL, '');
    }
}