# -*- coding: utf-8 -*-
import os.path
import httpx
import time
from httpx import BasicAuth
from typing import Dict, Any, Optional, Tuple


class WorldQuantBrainSimulate:
    def __init__(self, credentials_file='account.txt'):
        self.credentials_file = credentials_file
        self.client = None
        self.brain_api_url = 'https://api.worldquantbrain.com'

    """读取本地账号密码"""
    def load_credentials(self) -> Tuple[str, str]:
        if not os.path.exists(self.credentials_file):
            print("未找到 account.txt 文件")
            with open(self.credentials_file, 'w') as f:
                f.write("")
            print("account.txt 文件已创建，请填写账号密码, 格式: ['username', 'password]")
            exit(1)

        with open(self.credentials_file) as f:
            credentials = eval(f.read())
        return credentials[0], credentials[1]

    """登录认证"""
    def login(self) -> bool:
        username, password = self.load_credentials()
        self.client = httpx.Client(auth=BasicAuth(username, password))

        response = self.client.post(f'{self.brain_api_url}/authentication')
        print(f"登录状态: {response.status_code}")

        if response.status_code == 201:
            print("登录成功!")
            print(f"账户信息: {response.json()}")
            return True
        else:
            print(f"登录失败: {response.json()}")
            return False

    """模拟Alpha因子"""
    def simulate_alpha(self, expression: str, settings: Optional[Dict[str, Any]] = None) -> Dict[str, Any]:
        if self.client is None:
            raise Exception("请先登录")

        default_settings = {
            'instrumentType': 'EQUITY',
            'region': 'USA',
            'universe': 'TOP3000',
            'delay': 1,
            'decay': 0,
            'neutralization': 'INDUSTRY',
            'truncation': 0.08,
            'pasteurization': 'ON',
            'unitHandling': 'VERIFY',
            'nanHandling': 'OFF',
            'language': 'FASTEXPR',
            'visualization': False,
        }

        if settings:
            default_settings.update(settings)

        simulation_data = {
            'type': 'REGULAR',
            'settings': default_settings,
            'regular': expression
        }

        sim_resp = self.client.post(f'{self.brain_api_url}/simulations', json=simulation_data)
        print(f"模拟提交状态: {sim_resp.status_code}")

        sim_progress_url = sim_resp.headers['location']
        print(f"进度URL: {sim_progress_url}")

        while True:
            sim_progress_resp = self.client.get(sim_progress_url)
            retry_after_sec = float(sim_progress_resp.headers.get("Retry-After", 0))

            if retry_after_sec == 0:
                break
            if sim_progress_resp.json():
                result = sim_progress_resp.json()
                progress = result['progress']
                if progress:
                    print(f"模拟进度: {float(progress)*100}%")

            print(f"等待 {retry_after_sec} 秒...")
            time.sleep(retry_after_sec)

        # 如果因子模拟不通过, 获取一下失败信息
        if sim_progress_resp.json()["status"] == "ERROR":
            result = sim_progress_resp.json()["message"]
            print(f"因子模拟失败: {result}")
            # 返回一个特殊标识，表示模拟失败
            return {"status": "error", "message": result}

        alpha_id = sim_progress_resp.json()["alpha"]
        print(f"生成的Alpha ID: {alpha_id}")

        # 获取详细的性能指标
        metrics = self.get_alpha_metrics(alpha_id)

        return {"status": "success", "alpha_id": alpha_id, "metrics": metrics}

    """获取Alpha因子的详细指标"""
    def get_alpha_metrics(self, alpha_id: str) -> Dict[str, Any]:
        if self.client is None:
            raise Exception("请先登录")

        try:
            # 获取Alpha的基本信息和指标
            alpha_url = f'{self.brain_api_url}/alphas/{alpha_id}'
            alpha_resp = self.client.get(alpha_url)

            if alpha_resp.status_code in [200, 201]:
                alpha_data = alpha_resp.json()

                # 以后可能需要获取其他参数
                if alpha_data.get('metrics'):
                    alpha_data = alpha_data.get('metrics')

                return alpha_data or {}
            else:
                print(f"获取Alpha指标失败: {alpha_resp.status_code}")
                # 返回一个空的字典结构
                return {
                    "train": {},
                    "is": {},
                    "test": {},
                    "grade": None,
                    "stage": None,
                    "status": None,
                    "dateCreated": None,
                    "id": alpha_id
                }

        except Exception as e:
            print(f"获取指标时出错: {str(e)}")
            # 返回一个空的字典结构
            return {
                "train": {},
                "is": {},
                "test": {},
                "grade": None,
                "stage": None,
                "status": None,
                "dateCreated": None,
                "id": alpha_id
            }

    def close(self):
        """关闭连接"""
        if self.client:
            self.client.close()