"""
Stripe SEPA 支付 API 模块
- 使用纯 API 方式完成 Stripe SEPA 支付
- 参考 team-reg-go/stripe/stripe.go 实现
"""

import re
import time
import uuid
import random

try:
    from curl_cffi import requests as curl_requests
    CURL_CFFI_AVAILABLE = True
except ImportError:
    CURL_CFFI_AVAILABLE = False
    curl_requests = None

import requests


def log_status(step, message):
    """日志输出"""
    timestamp = time.strftime("%H:%M:%S")
    print(f"[{timestamp}] [{step}] {message}")


def log_progress(message):
    """进度输出"""
    print(f"           {message}")


# Stripe 配置常量 (与 team-reg-go 保持一致)
STRIPE_VERSION = "2020-08-27;custom_checkout_beta=v1"
STRIPE_JS_VERSION = "c8cd270e71"
OPENAI_STRIPE_PUBLIC_KEY = "pk_live_51Pj377KslHRdbaPgTJYjThzH3f5dt1N1vK7LUp0qh0yNSarhfZ6nfbG7FFlh8KLxVkvdMWN5o6Mc4Vda6NHaSnaV00C2Sbl8Zs"


def generate_stripe_fingerprint() -> str:
    """生成 Stripe 指纹 ID"""
    return uuid.uuid4().hex


def extract_session_id(checkout_url: str) -> str:
    """从 checkout URL 提取 session_id"""
    match = re.search(r'(cs_(?:live|test)_[a-zA-Z0-9]+)', checkout_url)
    if match:
        return match.group(1)
    return ""


class StripePaymentAPI:
    """Stripe SEPA 支付 API 处理器"""
    
    def __init__(self, checkout_url: str, session=None, proxy: str = None):
        """初始化
        
        Args:
            checkout_url: Stripe checkout URL
            session: 可选的 curl_cffi session (复用已有会话)
            proxy: 代理地址
        """
        self.checkout_url = checkout_url
        self.session_id = extract_session_id(checkout_url)
        self.stripe_public_key = OPENAI_STRIPE_PUBLIC_KEY
        self.init_checksum = ""
        self.js_checksum = ""
        self.guid = generate_stripe_fingerprint()
        self.muid = generate_stripe_fingerprint()
        self.sid = generate_stripe_fingerprint()
        self.client_session_id = ""
        self.checkout_config_id = ""
        
        # 创建或复用 session
        if session:
            self.session = session
        elif CURL_CFFI_AVAILABLE:
            self.session = curl_requests.Session(
                impersonate="chrome",
                verify=False,
                proxies={"http": proxy, "https": proxy} if proxy else {}
            )
        else:
            self.session = requests.Session()
            if proxy:
                self.session.proxies = {"http": proxy, "https": proxy}
    
    def _get_stripe_headers(self) -> dict:
        """获取 Stripe API 请求头"""
        return {
            "Content-Type": "application/x-www-form-urlencoded",
            "Accept": "application/json",
            "Origin": "https://pay.openai.com",
            "Referer": "https://pay.openai.com/",
            "Sec-Fetch-Site": "cross-site",
            "Sec-Fetch-Mode": "cors",
            "Sec-Fetch-Dest": "empty",
            "Sec-Ch-Ua-Platform": '"Windows"',
            "Accept-Language": "en-US,en;q=0.9",
            "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36"
        }
    
    def fetch_checkout_page(self) -> bool:
        """获取 checkout 页面参数"""
        try:
            headers = {
                "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",
                "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36"
            }
            resp = self.session.get(self.checkout_url, headers=headers, timeout=30)
            
            if resp.status_code == 200:
                html = resp.text
                
                # 提取 initChecksum
                init_match = re.search(r'"initChecksum":\s*"([^"]+)"', html)
                if init_match:
                    self.init_checksum = init_match.group(1)
                
                # 提取 jsChecksum
                js_match = re.search(r'"jsChecksum":\s*"([^"]+)"', html)
                if js_match:
                    self.js_checksum = js_match.group(1)
                
                return True
            return False
        except Exception as e:
            log_progress(f"[!] 获取 checkout 页面失败: {e}")
            return False
    
    def create_payment_method(self, iban: str, name: str, email: str, 
                               address: str, city: str, postal_code: str, 
                               country: str = "DE") -> str:
        """Step 1: 创建支付方式
        
        Returns:
            str: payment_method_id，失败返回空字符串
        """
        api_url = "https://api.stripe.com/v1/payment_methods"
        
        self.client_session_id = str(uuid.uuid4())
        self.checkout_config_id = str(uuid.uuid4())
        
        data = {
            "type": "sepa_debit",
            "sepa_debit[iban]": iban,
            "billing_details[name]": name,
            "billing_details[email]": email,
            "billing_details[address][country]": country,
            "billing_details[address][line1]": address,
            "billing_details[address][city]": city,
            "billing_details[address][postal_code]": postal_code,
            "guid": self.guid,
            "muid": self.muid,
            "sid": self.sid,
            "_stripe_version": STRIPE_VERSION,
            "key": self.stripe_public_key,
            "payment_user_agent": f"stripe.js/{STRIPE_JS_VERSION}; stripe-js-v3/{STRIPE_JS_VERSION}; checkout",
            "client_attribution_metadata[client_session_id]": self.client_session_id,
            "client_attribution_metadata[checkout_session_id]": self.session_id,
            "client_attribution_metadata[merchant_integration_source]": "checkout",
            "client_attribution_metadata[merchant_integration_version]": "hosted_checkout",
            "client_attribution_metadata[payment_method_selection_flow]": "automatic",
            "client_attribution_metadata[checkout_config_id]": self.checkout_config_id,
        }
        
        try:
            resp = self.session.post(api_url, data=data, headers=self._get_stripe_headers(), timeout=30)
            
            if resp.status_code == 200:
                result = resp.json()
                payment_method_id = result.get("id", "")
                if payment_method_id:
                    return payment_method_id
            
            error_text = resp.text[:200] if resp.text else "无响应"
            log_progress(f"[X] 创建支付方式失败: {resp.status_code} - {error_text}")
            return ""
        except Exception as e:
            log_progress(f"[X] 创建支付方式异常: {e}")
            return ""
    
    def confirm_payment(self, payment_method_id: str, captcha_token: str = "", 
                        rv_timestamp: str = "") -> tuple:
        """Step 2: 确认支付
        
        Returns:
            tuple: (success: bool, error_message: str)
        """
        api_url = f"https://api.stripe.com/v1/payment_pages/{self.session_id}/confirm"
        
        data = {
            "eid": "NA",
            "payment_method": payment_method_id,
            "expected_amount": "0",
            "consent[terms_of_service]": "accepted",
            "tax_id_collection[purchasing_as_business]": "false",
            "expected_payment_method_type": "sepa_debit",
            "_stripe_version": STRIPE_VERSION,
            "guid": self.guid,
            "muid": self.muid,
            "sid": self.sid,
            "key": self.stripe_public_key,
            "version": STRIPE_JS_VERSION,
            "referrer": "https://chatgpt.com",
            "client_attribution_metadata[client_session_id]": self.client_session_id,
            "client_attribution_metadata[checkout_session_id]": self.session_id,
            "client_attribution_metadata[merchant_integration_source]": "checkout",
            "client_attribution_metadata[merchant_integration_version]": "hosted_checkout",
            "client_attribution_metadata[payment_method_selection_flow]": "automatic",
            "client_attribution_metadata[checkout_config_id]": self.checkout_config_id,
        }
        
        if self.init_checksum:
            data["init_checksum"] = self.init_checksum
        if self.js_checksum:
            data["js_checksum"] = self.js_checksum
        if captcha_token:
            data["passive_captcha_token"] = captcha_token
            data["passive_captcha_ekey"] = ""
        if rv_timestamp:
            data["rv_timestamp"] = rv_timestamp
        
        try:
            resp = self.session.post(api_url, data=data, headers=self._get_stripe_headers(), timeout=30)
            
            if resp.status_code == 200:
                result = resp.json()
                state = result.get("state", "")
                
                if state in ["succeeded", "processing", "processing_subscription"]:
                    return True, ""
                elif state == "failed":
                    error = result.get("error", {})
                    error_msg = error.get("message", str(error)) if isinstance(error, dict) else str(error)
                    return False, f"支付失败: {error_msg}"
                else:
                    # 其他状态继续轮询
                    return True, ""
            
            error_text = resp.text[:200] if resp.text else "无响应"
            return False, f"确认失败: {resp.status_code} - {error_text}"
        except Exception as e:
            return False, f"确认异常: {e}"
    
    def poll_payment_status(self, max_attempts: int = 20) -> tuple:
        """Step 3: 轮询支付状态
        
        Returns:
            tuple: (state: str, error_message: str)
        """
        api_url = f"https://api.stripe.com/v1/payment_pages/{self.session_id}/poll?key={self.stripe_public_key}"
        
        for attempt in range(max_attempts):
            try:
                resp = self.session.get(api_url, headers=self._get_stripe_headers(), timeout=30)
                
                if resp.status_code == 200:
                    result = resp.json()
                    state = result.get("state", "")
                    
                    if state == "succeeded":
                        return "succeeded", ""
                    elif state in ["failed", "canceled"]:
                        return state, f"支付 {state}"
                
                time.sleep(2)
            except Exception as e:
                log_progress(f"[!] 轮询异常: {e}")
                time.sleep(2)
        
        return "timeout", "轮询超时"
    
    def complete_payment(self, iban: str, name: str, email: str,
                         address: str, city: str, postal_code: str,
                         country: str = "DE") -> tuple:
        """执行完整支付流程
        
        Returns:
            tuple: (success: bool, error_message: str)
        """
        # 获取页面参数
        self.fetch_checkout_page()
        
        # Step 1: 创建支付方式
        payment_method_id = self.create_payment_method(
            iban, name, email, address, city, postal_code, country
        )
        if not payment_method_id:
            return False, "创建支付方式失败"
        
        # Step 2: 确认支付
        success, error = self.confirm_payment(payment_method_id)
        if not success:
            return False, error
        
        # Step 3: 轮询状态
        state, error = self.poll_payment_status(15)
        if state == "succeeded":
            return True, ""
        
        return False, error or f"支付失败: {state}"


def api_payment_with_retry(checkout_url: str, email: str, session=None, proxy: str = None,
                           max_retries: int = 3, get_iban_func=None, 
                           get_address_func=None, get_name_func=None,
                           progress_callback=None) -> tuple:
    """使用 API 完成支付流程（带 IBAN 重试）
    
    Args:
        checkout_url: Stripe checkout URL
        email: 邮箱地址
        session: 可选的 curl_cffi session
        proxy: 代理地址
        max_retries: 最大重试次数
        get_iban_func: 获取 IBAN 的函数，签名: func() -> str
        get_address_func: 获取地址的函数，签名: func() -> tuple(street, postal_code, city)
        get_name_func: 获取姓名的函数，签名: func() -> str
        progress_callback: 进度回调函数
        
    Returns:
        tuple: (success: bool, error_message: str)
    """
    def log_cb(msg):
        if progress_callback:
            progress_callback(msg)
        else:
            log_progress(msg)
    
    # 默认的 IBAN/地址/姓名生成函数
    if get_iban_func is None:
        def get_iban_func():
            # 从 auto_gpt_team 导入
            try:
                from auto_gpt_team import get_sepa_ibans
                ibans = get_sepa_ibans()
                return random.choice(ibans) if ibans else ""
            except:
                return ""
    
    if get_address_func is None:
        def get_address_func():
            try:
                from auto_gpt_team import SEPA_ADDRESSES
                return random.choice(SEPA_ADDRESSES)
            except:
                return ("Alexanderplatz 1", "10178", "Berlin")
    
    if get_name_func is None:
        def get_name_func():
            try:
                from auto_gpt_team import FIRST_NAMES, LAST_NAMES
                return f"{random.choice(FIRST_NAMES)} {random.choice(LAST_NAMES)}"
            except:
                return "Max Mustermann"
    
    # 初始化 Stripe 支付处理器
    stripe_handler = StripePaymentAPI(checkout_url, session=session, proxy=proxy)
    
    last_error = ""
    
    for retry in range(max_retries):
        # 生成支付信息
        iban = get_iban_func()
        if not iban:
            return False, "没有可用的 IBAN"
        
        street, postal_code, city = get_address_func()
        account_name = get_name_func()
        
        if retry == 0:
            log_status("API支付", "SEPA 支付处理中...")
            log_cb(f"IBAN: {iban[:8]}...")
            log_cb(f"地址: {street}, {postal_code} {city}")
            log_cb(f"姓名: {account_name}")
        else:
            log_cb(f"[!] 重试 {retry}/{max_retries-1}，更换 IBAN...")
            log_cb(f"新 IBAN: {iban[:8]}...")
        
        success, error = stripe_handler.complete_payment(
            iban, account_name, email, street, city, postal_code, "DE"
        )
        
        if success:
            log_status("API支付", "[OK] 支付成功")
            return True, ""
        
        last_error = error
        
        # 分析错误类型，决定是否重试
        error_lower = error.lower() if error else ""
        
        # IBAN/BIC 相关错误 - 换 IBAN 重试
        if "bank_account_unusable" in error_lower or "bic" in error_lower or "iban" in error_lower:
            log_cb(f"[!] IBAN 无效: {error}")
            if retry < max_retries - 1:
                continue
        
        # 可恢复错误 - 重试
        retryable_errors = ["400", "500", "timeout", "eof", "connection", "确认失败"]
        is_retryable = any(e in error_lower for e in retryable_errors)
        
        if is_retryable and retry < max_retries - 1:
            log_cb(f"[!] 支付错误: {error}，重试中...")
            time.sleep(1)
            continue
        
        # 不可恢复错误或重试用尽
        break
    
    log_status("API支付", f"[X] 支付失败: {last_error}")
    return False, last_error


def is_stripe_api_available() -> bool:
    """检查 Stripe API 模式是否可用"""
    return CURL_CFFI_AVAILABLE