#!/usr/bin/env python3
"""
限流功能测试
"""

import sys
import json
from pathlib import Path

project_root = Path(__file__).parent.parent
sys.path.insert(0, str(project_root))

import importlib


rate_limiter_path = str(project_root / "oss" / "core" / "http_api" / "rate_limiter.py")
spec = importlib.util.spec_from_file_location("rate_limiter_mod", rate_limiter_path)
rate_limiter_mod = importlib.util.module_from_spec(spec)
sys.modules["rate_limiter_mod"] = rate_limiter_mod
spec.loader.exec_module(rate_limiter_mod)

RateLimiter = rate_limiter_mod.RateLimiter
RateLimitMiddleware = rate_limiter_mod.RateLimitMiddleware


def test_rate_limiter():
    """测试限流器基本功能"""
    print("=== 测试限流器 ===")

    limiter = RateLimiter(max_requests=3, time_window=1)

    for i in range(3):
        allowed = limiter.is_allowed("test_ip")
        print(f"请求 {i+1}: {'允许' if allowed else '拒绝'}")
        assert allowed, f"请求 {i+1} 应该被允许"

    allowed = limiter.is_allowed("test_ip")
    print(f"请求 4: {'允许' if allowed else '拒绝'}")
    assert not allowed, "请求 4 应该被拒绝"

    print("限流器基本功能测试通过")


def test_rate_limit_middleware():
    """测试限流中间件"""
    print("\n=== 测试限流中间件 ===")

    middleware = RateLimitMiddleware()

    class MockRequest:
        def __init__(self, path="/api/test", headers=None):
            self.path = path
            self.headers = headers or {"Remote-Addr": "127.0.0.1"}

    middleware.enabled = False
    ctx = {"request": MockRequest()}
    result = middleware.process(ctx, lambda: None)
    assert result is None, "禁用限流时应该直接通过"
    print("禁用限流测试通过")

    middleware.enabled = True
    ctx = {"request": MockRequest()}
    result = middleware.process(ctx, lambda: None)
    assert result is None, "启用限流时应该允许请求"
    print("启用限流测试通过")

    print("限流中间件测试通过")


def test_endpoint_specific_limiting():
    """测试端点特定限流"""
    print("\n=== 测试端点特定限流 ===")

    middleware = RateLimitMiddleware()

    class MockRequest:
        def __init__(self, path, headers=None):
            self.path = path
            self.headers = headers or {"Remote-Addr": "127.0.0.1"}

    ctx = {"request": MockRequest("/api/test")}
    result = middleware.process(ctx, lambda: None)
    assert result is None, "普通端点应该允许请求"
    print("普通端点限流测试通过")

    ctx = {"request": MockRequest("/api/dashboard/stats")}
    result = middleware.process(ctx, lambda: None)
    assert result is None, "特定端点应该允许请求"
    print("特定端点限流测试通过")

    print("端点特定限流测试通过")


def test_client_identification():
    """测试客户端标识符"""
    print("\n=== 测试客户端标识符 ===")

    middleware = RateLimitMiddleware()

    request = type('Request', (), {
        'headers': {'Remote-Addr': '192.168.1.1'}
    })()
    identifier = middleware._get_client_identifier(request)
    assert identifier == "ip:192.168.1.1", f"IP标识符错误: {identifier}"
    print("IP标识符测试通过")

    request = type('Request', (), {
        'headers': {'Authorization': 'Bearer test_key_123'}
    })()
    identifier = middleware._get_client_identifier(request)
    assert identifier == "api_key:test_key_123", f"API Key标识符错误: {identifier}"
    print("API Key标识符测试通过")

    print("客户端标识符测试通过")


def test_rate_limit_response():
    """测试限流响应"""
    print("\n=== 测试限流响应 ===")

    middleware = RateLimitMiddleware()
    response = middleware._create_rate_limit_response()

    assert response.status == 429, f"状态码错误: {response.status}"
    assert "Rate limit exceeded" in response.body, "响应体错误"
    assert "Retry-After" in response.headers, "缺少Retry-After头"
    assert "X-Rate-Limit-Limit" in response.headers, "缺少X-Rate-Limit-Limit头"

    print("限流响应测试通过")


if __name__ == "__main__":
    print("开始限流功能测试...")

    tests = [
        ("限流器基本功能测试", test_rate_limiter),
        ("限流中间件测试", test_rate_limit_middleware),
        ("端点特定限流测试", test_endpoint_specific_limiting),
        ("客户端标识符测试", test_client_identification),
        ("限流响应测试", test_rate_limit_response),
    ]

    passed = 0
    total = len(tests)

    for test_name, test_func in tests:
        print(f"\n--- {test_name} ---")
        try:
            test_func()
            passed += 1
            print(f"{test_name} 通过")
        except Exception as e:
            print(f"{test_name} 失败: {e}")

    print(f"\n--- 测试结果 ---")
    print(f"通过: {passed}/{total}")

    if passed == total:
        print("所有限流功能测试通过！")
        sys.exit(0)
    else:
        print("部分测试失败，需要修复。")
        sys.exit(1)