"""集成测试 - 完整流程测试."""
import sys
sys.path.insert(0, 'src')
sys.path.insert(0, 'tests')

import os
import tempfile
import json
from http.client import HTTPConnection
from threading import Thread
from time import sleep

from rule_engine.api import create_app
from rule_engine.store import RuleStore
from rule_engine.executor import RuleExecutor
from rule_engine.matcher import RuleMatcher
from rule_engine.conflict import ConflictDetector


def test_full_workflow():
    """完整工作流测试：创建规则 -> 校验 -> 执行."""
    # 创建临时数据库
    fd, path = tempfile.mkstemp(suffix='.db')
    os.close(fd)
    store = RuleStore(path)

    # 创建规则
    rule = store.create_rule(
        name='premium_discount',
        condition_template='如果用户订阅 premium 返回8折',
        code='def rule(facts):\n    if facts.get("subscription") == "premium":\n        return {"action": "discount", "rate": 0.8}\n    return None',
        priority=1
    )
    print(f'Created rule: {rule.id}')

    # 执行器测试
    executor = RuleExecutor()
    result = executor.execute_rule(rule.code, {"subscription": "premium"})
    assert result == {"action": "discount", "rate": 0.8}
    print('Executor test: OK')

    # 匹配器测试
    matcher = RuleMatcher(store, executor)
    rule_id, result = matcher.find_matching_rule({"subscription": "premium"})
    assert rule_id == rule.id
    print('Matcher test: OK')

    os.unlink(path)
    print('Full workflow test: PASSED')


def test_api_server():
    """API 服务器集成测试."""
    fd, path = tempfile.mkstemp(suffix='.db')
    os.close(fd)
    store = RuleStore(path)

    srv = create_app(store, host='127.0.0.1', port=18003)
    thread = Thread(target=srv.serve_forever, daemon=True)
    thread.start()
    sleep(0.2)

    client = HTTPConnection('127.0.0.1', 18003)

    # Health check
    client.request('GET', '/health')
    resp = client.getresponse()
    assert resp.status == 200
    data = json.loads(resp.read())
    assert data['status'] == 'ok'
    print('Health check: OK')

    # Create rule
    body = json.dumps({
        'name': 'test_rule',
        'condition_template': '测试规则',
        'code': 'def rule(facts):\n    if facts.get("active"):\n        return {"action": "ok"}\n    return None'
    })
    client.request('POST', '/api/rules', body=body, headers={'Content-Type': 'application/json'})
    resp = client.getresponse()
    assert resp.status == 201
    data = json.loads(resp.read())
    rule_id = data['id']
    print(f'Created rule: {rule_id}')

    # List rules
    client.request('GET', '/api/rules')
    resp = client.getresponse()
    data = json.loads(resp.read())
    assert len(data['rules']) >= 1
    print('List rules: OK')

    # Get rule
    client.request('GET', f'/api/rules/{rule_id}')
    resp = client.getresponse()
    data = json.loads(resp.read())
    assert data['name'] == 'test_rule'
    print('Get rule: OK')

    # Evaluate (no match yet - executor not integrated in mock)
    body = json.dumps({'facts': {'active': True}})
    client.request('POST', '/api/rules/evaluate', body=body, headers={'Content-Type': 'application/json'})
    resp = client.getresponse()
    data = json.loads(resp.read())
    print(f'Evaluate response: {data}')

    # Delete rule
    client.request('DELETE', f'/api/rules/{rule_id}')
    resp = client.getresponse()
    assert resp.status == 200
    print('Delete rule: OK')

    srv.shutdown()
    os.unlink(path)
    print('API server test: PASSED')


def test_conflict_detection():
    """冲突检测测试."""
    detector = ConflictDetector()

    # 测试1：相反动作冲突
    rules = [
        {'id': 'r1', 'name': 'allow_vip', 'code': 'def rule(f):\n    if f.get("type") == "vip":\n        return {"action": "allow"}\n    return None', 'priority': 1, 'is_active': True},
        {'id': 'r2', 'name': 'deny_vip', 'code': 'def rule(f):\n    if f.get("type") == "vip":\n        return {"action": "deny"}\n    return None', 'priority': 1, 'is_active': True},
    ]
    conflicts = detector.detect_conflicts(rules)
    assert len(conflicts) == 1
    assert conflicts[0]['requires_resolution'] is True
    print('Conflict detection (opposite actions): OK')

    # 测试2：不同字段不冲突
    rules = [
        {'id': 'r1', 'name': 'rule_a', 'code': 'def rule(f):\n    if f.get("a") == 1:\n        return {"action": "allow"}\n    return None', 'priority': 1, 'is_active': True},
        {'id': 'r2', 'name': 'rule_b', 'code': 'def rule(f):\n    if f.get("b") == 1:\n        return {"action": "deny"}\n    return None', 'priority': 1, 'is_active': True},
    ]
    conflicts = detector.detect_conflicts(rules)
    assert len(conflicts) == 0
    print('Conflict detection (different fields): OK')

    # 测试3：不同优先级不冲突
    rules = [
        {'id': 'r1', 'name': 'allow', 'code': 'def rule(f):\n    return {"action": "allow"}', 'priority': 2, 'is_active': True},
        {'id': 'r2', 'name': 'deny', 'code': 'def rule(f):\n    return {"action": "deny"}', 'priority': 1, 'is_active': True},
    ]
    conflicts = detector.detect_conflicts(rules)
    assert len(conflicts) == 0
    print('Conflict detection (different priority): OK')

    print('Conflict detection test: PASSED')


def test_executor_sandbox():
    """沙箱执行器安全测试."""
    executor = RuleExecutor()

    # 危险操作应被验证拦截
    assert executor.validate_rule_code('def rule(f):\n    import os') is False
    assert executor.validate_rule_code('def rule(f):\n    exec("")') is False
    assert executor.validate_rule_code('def rule(f):\n    eval("")') is False
    print('Sandbox validation (blocked keywords): OK')

    # 合法代码应通过
    assert executor.validate_rule_code('def rule(facts):\n    return None') is True
    print('Sandbox validation (valid code): OK')

    # 正常执行
    code = 'def rule(facts):\n    if facts.get("x", 0) > 10:\n        return {"result": "big"}\n    return None'
    result = executor.execute_rule(code, {"x": 20})
    assert result == {"result": "big"}
    print('Sandbox execution: OK')

    print('Sandbox test: PASSED')


if __name__ == '__main__':
    print('=' * 50)
    print('Running integration tests...')
    print('=' * 50)

    test_full_workflow()
    print()
    test_api_server()
    print()
    test_conflict_detection()
    print()
    test_executor_sandbox()

    print()
    print('=' * 50)
    print('ALL INTEGRATION TESTS PASSED')
    print('=' * 50)