<?php

declare(strict_types=1);

namespace tests\Unit;

use app\common\service\XhprofProfileParserService;
use PHPUnit\Framework\TestCase;

/**
 * XHProf jsonl 行解析器单元测试（纯数组处理，不触 DB）.
 *
 * fixture：tests/fixtures/xhprof-sample.jsonl 为容器内真实采样首行
 * （103441 字节，md5 与容器内原行一致），断言值来自该 fixture 实测。
 */
class XhprofProfileParserTest extends TestCase
{
    private XhprofProfileParserService $parser;

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

    private function loadFixtureLine(): string
    {
        $content = file_get_contents(__DIR__ . '/../fixtures/xhprof-sample.jsonl');
        self::assertNotFalse($content, 'fixture 文件缺失');

        return trim($content);
    }

    /**
     * 真实 fixture 行：解析出的字段值与 fixture 内实际数值一致.
     */
    public function test_parse_real_fixture_line(): void
    {
        $parsed = $this->parser->parse($this->loadFixtureLine());
        self::assertNotNull($parsed);

        // 断言值来自 analyze 实测（见 .omo/evidence/task-3-xhprof-log-backend.txt）
        self::assertSame('/', $parsed['url']);
        self::assertSame('', $parsed['simple_url']); // 根路径 simple_url 原生即为空串
        self::assertSame('GET', $parsed['method']);
        self::assertSame(8402968, $parsed['wall_time']);
        self::assertSame(340812, $parsed['cpu_time']);
        self::assertSame(1981664, $parsed['memory_peak']);
        // request_ts_micro = {"sec":1786744108,"usec":846845}
        self::assertEqualsWithDelta(1786744108.847, $parsed['request_time'], 0.0005);
        self::assertFalse($parsed['degraded']);
        self::assertCount(954, $parsed['profile']);
    }

    public function test_parse_rejects_bad_lines(): void
    {
        self::assertNull($this->parser->parse(''));
        self::assertNull($this->parser->parse('not json at all'));
        self::assertNull($this->parser->parse('{truncated'));
        self::assertNull($this->parser->parse('{"meta":{"url":"/"}}')); // 缺 profile 键
        self::assertNull($this->parser->parse('["array","not","object"]'));
    }

    /**
     * simple_url 缺失时兜底：path 去 query、纯数字段替换 :id（与 bootstrap 回调算法一致）.
     */
    public function test_simple_url_fallback(): void
    {
        $line = json_encode([
            'profile' => ['main()' => ['ct' => 1, 'wt' => 10, 'cpu' => 1, 'mu' => 1, 'pmu' => 2]],
            'meta' => ['url' => '/api/goods/45/detail?foo=bar&baz=1'],
        ], JSON_UNESCAPED_SLASHES);
        $parsed = $this->parser->parse($line);
        self::assertNotNull($parsed);
        self::assertSame('api/goods/:id/detail', $parsed['simple_url']);
        self::assertSame(10, $parsed['wall_time']);
        self::assertSame(2, $parsed['memory_peak']);
        self::assertSame('', $parsed['method']);
        self::assertSame(0.0, $parsed['request_time']);
    }

    /**
     * url 超 500 截断.
     */
    public function test_url_truncated_to_500(): void
    {
        $line = json_encode([
            'profile' => ['main()' => ['ct' => 1, 'wt' => 1, 'cpu' => 0, 'mu' => 0, 'pmu' => 0]],
            'meta' => ['url' => '/' . str_repeat('a', 600), 'simple_url' => 'x'],
        ]);
        $parsed = $this->parser->parse($line);
        self::assertNotNull($parsed);
        self::assertSame(500, mb_strlen($parsed['url']));
    }

    /**
     * main() 缺失：降级 0 且 degraded=true（行仍可入库，由导入侧计 fail）.
     */
    public function test_parse_missing_main_degraded(): void
    {
        $line = json_encode([
            'profile' => ['foo==>bar' => ['ct' => 1, 'wt' => 5]],
            'meta' => ['url' => '/x'],
        ]);
        $parsed = $this->parser->parse($line);
        self::assertNotNull($parsed);
        self::assertTrue($parsed['degraded']);
        self::assertSame(0, $parsed['wall_time']);
        self::assertSame(0, $parsed['cpu_time']);
        self::assertSame(0, $parsed['memory_peak']);
    }

    /**
     * watch 物化：按 callee 匹配，caller 匹配不命中；ct 累加、wt_sum 累加、wt_max 取最大.
     */
    public function test_materialize_watches_by_callee(): void
    {
        $profile = [
            'main()' => ['ct' => 1, 'wt' => 1000, 'cpu' => 10, 'mu' => 0, 'pmu' => 0],
            'main()==>think\\db\\PDOConnection::query' => ['ct' => 2, 'wt' => 500],
            'foo==>think\\db\\PDOConnection::query' => ['ct' => 3, 'wt' => 700],
            'think\\db\\PDOConnection::query==>bar' => ['ct' => 9, 'wt' => 9999], // callee=bar 不命中
            'plain_function' => ['ct' => 4, 'wt' => 4], // 裸键不参与
        ];
        $patterns = [7 => '~^think\\\\db\\\\PDOConnection::~'];

        $result = $this->parser->materializeWatches($profile, $patterns);

        self::assertArrayHasKey(7, $result);
        self::assertSame(5, $result[7]['ct']);
        self::assertSame(1200, $result[7]['wt_sum']);
        self::assertSame(700, $result[7]['wt_max']);
    }

    /**
     * 真实 fixture 的 watch 物化：PDOConnection 规则必然命中（fixture 实测 33 条边）.
     */
    public function test_materialize_watches_on_real_fixture(): void
    {
        $parsed = $this->parser->parse($this->loadFixtureLine());
        self::assertNotNull($parsed);

        $result = $this->parser->materializeWatches($parsed['profile'], [99 => '~PDOConnection::~']);
        self::assertArrayHasKey(99, $result);
        self::assertGreaterThan(0, $result[99]['ct']);
        self::assertGreaterThan(0, $result[99]['wt_sum']);
    }

    /**
     * 正则编译：非法正则跳过该条并计 fail，合法条目进 patterns.
     */
    public function test_compile_watch_regexes(): void
    {
        $watches = [
            ['id' => 1, 'regex' => '~^think\\\\db\\\\PDOConnection::.*$~'],
            ['id' => 2, 'regex' => '/[unclosed'],       // 非法正则
            ['id' => 3, 'regex' => ''],                  // 空正则
            ['id' => 0, 'regex' => '~ok~'],              // 非法 id
        ];
        $compiled = $this->parser->compileWatchRegexes($watches);

        self::assertSame(3, $compiled['fails']);
        self::assertSame([1 => '~^think\\\\db\\\\PDOConnection::.*$~'], $compiled['patterns']);
    }

    /**
     * request_time 退化链：request_ts_micro 优先，缺失退化 REQUEST_TIME_FLOAT.
     */
    public function test_request_time_fallback_chain(): void
    {
        $base = ['profile' => ['main()' => ['ct' => 1, 'wt' => 1]]];

        $withTsMicro = $this->parser->parse(json_encode($base + [
            'meta' => ['request_ts_micro' => ['sec' => 1000000000, 'usec' => 250000]],
        ]));
        self::assertSame(1000000000.25, $withTsMicro['request_time']);

        $withFloatOnly = $this->parser->parse(json_encode($base + [
            'meta' => ['SERVER' => ['REQUEST_TIME_FLOAT' => 1234567890.123456]],
        ]));
        self::assertSame(1234567890.123, $withFloatOnly['request_time']);
    }
}