"""WorldQuant Brain API 批量处理模块"""

import json
import os
from datetime import datetime
from os.path import expanduser
from time import sleep

import pandas as pd
import requests
from requests.auth import HTTPBasicAuth

from alpha_strategy import AlphaStrategy
from dataset_config import get_api_settings, get_dataset_config


class BrainBatchAlpha:
    API_BASE_URL = 'https://api.worldquantbrain.com'

    def __init__(self, credentials_file='brain_credentials.txt'):
        """初始化 API 客户端"""

        self.session = requests.Session()
        self._setup_authentication(credentials_file)

    def _setup_authentication(self, credentials_file):
        """设置认证"""

        try:
            with open(expanduser(credentials_file)) as f:
                credentials = json.load(f)
            username, password = credentials
            self.session.auth = HTTPBasicAuth(username, password)

            response = self.session.post(f"{self.API_BASE_URL}/authentication")
            if response.status_code not in [200, 201]:
                raise Exception(f"认证失败: HTTP {response.status_code}")

            print("✅ 认证成功!")

        except Exception as e:
            print(f"❌ 认证错误: {str(e)}")
            raise

    def simulate_alphas(self, datafields=None, strategy_mode=1, dataset_name=None):
        """模拟 Alpha 列表"""

        try:
            datafields = self._get_datafields_if_none(datafields, dataset_name)
            if not datafields:
                return []

            alpha_list = self._generate_alpha_list(datafields, strategy_mode)
            if not alpha_list:
                return []

            print(f"\n🚀 开始模拟 {len(alpha_list)} 个 Alpha 表达式...")

            results = []
            for i, alpha in enumerate(alpha_list, 1):
                print(f"\n[{i}/{len(alpha_list)}] 正在模拟 Alpha...")
                result = self._simulate_single_alpha(alpha)
                if result and result.get('passed_all_checks'):
                    results.append(result)
                    self._save_alpha_id(result['alpha_id'], result)

                if i < len(alpha_list):
                    sleep(5)

            return results

        except Exception as e:
            print(f"❌ 模拟过程出错: {str(e)}")
            return []

    def _simulate_single_alpha(self, alpha):
        """模拟单个 Alpha"""

        try:
            print(f"表达式: {alpha.get('regular', 'Unknown')}")

            # 发送模拟请求
            sim_resp = self.session.post(
                f"{self.API_BASE_URL}/simulations",
                json=alpha
            )

            if sim_resp.status_code != 201:
                print(f"❌ 模拟请求失败 (状态码: {sim_resp.status_code})")
                return None

            try:
                sim_progress_url = sim_resp.headers['Location']
                start_time = datetime.now()
                total_wait = 0

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

                    if retry_after_sec == 0:  # simulation done!
                        alpha_id = sim_progress_resp.json()['alpha']
                        print(f"✅ 获得 Alpha ID: {alpha_id}")

                        # 等待一下让指标计算完成
                        sleep(3)

                        # 获取 Alpha 详情
                        alpha_url = f"{self.API_BASE_URL}/alphas/{alpha_id}"
                        alpha_detail = self.session.get(alpha_url)
                        alpha_data = alpha_detail.json()

                        # 检查是否有 is 字段
                        if 'is' not in alpha_data:
                            print("❌ 无法获取指标数据")
                            return None

                        is_qualified = self.check_alpha_qualification(alpha_data)

                        return {
                            'expression': alpha.get('regular'),
                            'alpha_id': alpha_id,
                            'passed_all_checks': is_qualified,
                            'metrics': alpha_data.get('is', {}),
                            'timestamp': datetime.now().strftime('%Y-%m-%d %H:%M:%S')
                        }

                    # 更新等待时间和进度
                    total_wait += retry_after_sec
                    elapsed = (datetime.now() - start_time).total_seconds()
                    progress = min(95, (elapsed / 30) * 100)  # 假设通常需要 30 秒完成

                    print(f"⏳ 等待模拟结果... ({elapsed:.1f} 秒 | 进度约 {progress:.0f}%)")
                    sleep(retry_after_sec)

            except KeyError:
                print("❌ 无法获取模拟进度 URL")
                return None

        except Exception as e:
            print(f"⚠️ Alpha 模拟失败: {str(e)}")
            return None

    def check_alpha_qualification(self, alpha_data):
        """检查 Alpha 是否满足所有提交条件"""

        try:
            # 从 'is' 字段获取指标
            is_data = alpha_data.get('is', {})
            if not is_data:
                print("❌ 无法获取指标数据")
                return False

            # 获取指标值
            sharpe = float(is_data.get('sharpe', 0))
            fitness = float(is_data.get('fitness', 0))
            turnover = float(is_data.get('turnover', 0))
            ic_mean = float(is_data.get('margin', 0))  # margin 对应 IC Mean

            # 获取子宇宙 Sharpe
            sub_universe_check = next(
                (
                    check for check in is_data.get('checks', [])
                    if check['name'] == 'LOW_SUB_UNIVERSE_SHARPE'
                ),
                {}
            )
            subuniverse_sharpe = float(sub_universe_check.get('value', 0))
            required_subuniverse_sharpe = float(sub_universe_check.get('limit', 0))

            # 打印指标
            print("\n📊 Alpha 指标详情:")
            print(f"  Sharpe: {sharpe:.3f} (>1.5)")
            print(f"  Fitness: {fitness:.3f} (>1.0)")
            print(f"  Turnover: {turnover:.3f} (0.1-0.9)")
            print(f"  IC Mean: {ic_mean:.3f} (>0.02)")
            print(f"  子宇宙 Sharpe: {subuniverse_sharpe:.3f} (>{required_subuniverse_sharpe:.3f})")

            print("\n📝 指标评估结果:")

            # 检查每个指标并输出结果
            is_qualified = True

            if sharpe < 1.5:
                print("❌ Sharpe ratio 不达标")
                is_qualified = False
            else:
                print("✅ Sharpe ratio 达标")

            if fitness < 1.0:
                print("❌ Fitness 不达标")
                is_qualified = False
            else:
                print("✅ Fitness 达标")

            if turnover < 0.1 or turnover > 0.9:
                print("❌ Turnover 不在合理范围")
                is_qualified = False
            else:
                print("✅ Turnover 达标")

            if ic_mean < 0.02:
                print("❌ IC Mean 不达标")
                is_qualified = False
            else:
                print("✅ IC Mean 达标")

            if subuniverse_sharpe < required_subuniverse_sharpe:
                print(f"❌ 子宇宙 Sharpe 不达标 ({subuniverse_sharpe:.3f} < {required_subuniverse_sharpe:.3f})")
                is_qualified = False
            else:
                print(f"✅ 子宇宙 Sharpe 达标 ({subuniverse_sharpe:.3f} > {required_subuniverse_sharpe:.3f})")

            print("\n🔍 检查项结果:")
            checks = is_data.get('checks', [])
            for check in checks:
                name = check.get('name')
                result = check.get('result')
                value = check.get('value', 'N/A')
                limit = check.get('limit', 'N/A')

                if result == 'PASS':
                    print(f"✅ {name}: {value} (限制: {limit})")
                elif result == 'FAIL':
                    print(f"❌ {name}: {value} (限制: {limit})")
                    is_qualified = False
                elif result == 'PENDING':
                    print(f"⚠️ {name}: 检查尚未完成")
                    is_qualified = False

            print("\n📋 最终评判:")
            if is_qualified:
                print("✅ Alpha 满足所有条件，可以提交!")
            else:
                print("❌ Alpha 未达到提交标准")

            return is_qualified

        except Exception as e:
            print(f"❌ 检查 Alpha 资格时出错: {str(e)}")
            return False

    def submit_alpha(self, alpha_id):
        """提交单个 Alpha"""

        submit_url = f"{self.API_BASE_URL}/alphas/{alpha_id}/submit"

        for attempt in range(5):
            print(f"🔄 第 {attempt + 1} 次尝试提交 Alpha {alpha_id}")

            # POST 请求
            res = self.session.post(submit_url)
            if res.status_code == 201:
                print("✅ POST: 成功，等待提交完成...")
            elif res.status_code in [400, 403]:
                print(f"❌ 提交被拒绝 ({res.status_code})")
                return False
            else:
                sleep(3)
                continue

            # 检查提交状态
            while True:
                res = self.session.get(submit_url)
                retry = float(res.headers.get('Retry-After', 0))

                if retry == 0:
                    if res.status_code == 200:
                        print("✅ 提交成功!")
                        return True
                    return False

                sleep(retry)

        return False

    def submit_multiple_alphas(self, alpha_ids):
        """批量提交 Alpha"""
        successful = []
        failed = []

        for alpha_id in alpha_ids:
            if self.submit_alpha(alpha_id):
                successful.append(alpha_id)
            else:
                failed.append(alpha_id)

            if alpha_id != alpha_ids[-1]:
                sleep(10)

        return successful, failed

    def _get_datafields_if_none(self, datafields=None, dataset_name=None):
        """获取数据字段列表"""

        try:
            if datafields is not None:
                return datafields

            if dataset_name is None:
                print("❌ 未指定数据集")
                return None

            config = get_dataset_config(dataset_name)
            if not config:
                print(f"❌ 无效的数据集: {dataset_name}")
                return None

            # 获取数据字段
            search_scope = {
                'instrumentType': 'EQUITY',
                'region': 'USA',
                'delay': '1',
                'universe': config['universe']
            }

            url_template = (
                f"{self.API_BASE_URL}/data-fields?"
                f"instrumentType={search_scope['instrumentType']}"
                f"&region={search_scope['region']}"
                f"&delay={search_scope['delay']}"
                f"&universe={search_scope['universe']}"
                f"&dataset.id={config['id']}"
                "&limit=50&offset={offset}"
            )

            # 获取总数
            initial_resp = self.session.get(url_template.format(offset=0))
            if initial_resp.status_code != 200:
                print("❌ 获取数据字段失败")
                return None

            total_count = initial_resp.json()['count']

            # 获取所有数据字段
            all_fields = []
            for offset in range(0, total_count, 50):
                resp = self.session.get(url_template.format(offset=offset))
                if resp.status_code != 200:
                    continue
                all_fields.extend(resp.json()['results'])

            # 过滤矩阵类型字段
            matrix_fields = [
                field['id'] for field in all_fields
                if field.get('type') == 'MATRIX'
            ]

            if not matrix_fields:
                print("❌ 未找到可用的数据字段")
                return None

            print(f"✅ 获取到 {len(matrix_fields)} 个数据字段")
            return matrix_fields

        except Exception as e:
            print(f"❌ 获取数据字段时出错: {str(e)}")
            return None

    def _generate_alpha_list(self, datafields, strategy_mode):
        """生成 Alpha 表达式列表"""
        try:
            # 初始化策略生成器
            strategy_generator = AlphaStrategy()

            # 生成策略列表
            strategies = strategy_generator.get_simulation_data(datafields, strategy_mode)

            print(f"生成了 {len(strategies)} 个Alpha表达式")

            # 转换为 API 所需的格式
            alpha_list = []
            for strategy in strategies:
                simulation_data = {
                    'type': 'REGULAR',
                    'settings': {
                        'instrumentType': 'EQUITY',
                        'region': 'USA',
                        'universe': 'TOP3000',
                        'delay': 1,
                        'decay': 0,
                        'neutralization': 'SUBINDUSTRY',
                        'truncation': 0.08,
                        'pasteurization': 'ON',
                        'unitHandling': 'VERIFY',
                        'nanHandling': 'ON',
                        'language': 'FASTEXPR',
                        'visualization': False,
                    },
                    'regular': strategy
                }
                alpha_list.append(simulation_data)

            return alpha_list

        except Exception as e:
            print(f"❌ 生成 Alpha 列表失败: {str(e)}")
            return []