import time
import json
import random
import re
import os
import base64
from datetime import datetime
from typing import List, Dict, Optional, Any, Callable
from urllib.parse import urljoin

from curl_cffi import requests, const
from bs4 import BeautifulSoup


from vs_plg import IVSPlg 
from vs_types import VSPlgConfig, AppointmentType, VSQueryResult, VSBookResult, TimeSlot, DateAvailability, AvailabilityStatus, NotFoundError, PermissionDeniedError, RateLimiteddError, SessionExpiredOrInvalidError, BizLogicError 
from toolkit.vs_cloud_api import VSCloudApi 
from toolkit.ocr_engine import DddOcrEngine


def to_yyyymmdd(data_str: str, date_str_format: str, target_format: str="%Y-%m-%d"):
    # 转换日期到YYYY-MM-DD 固定格式
    dt = datetime.strptime(data_str, date_str_format)
    return dt.strftime("%Y-%m-%d")

def get_alias_email(email: str, new_domain: str = "gmail-app.com") -> str:
    """
    将邮箱域名替换为指定域名（默认 gmail-app.com）
    """
    if "@" not in email:
        raise ValueError(f"Invalid email: {email}")

    local_part, _ = email.rsplit("@", 1)
    return f"{local_part}@{new_domain}"

class DePlugin(IVSPlg):
    """
    Germany (Visametric) 签证预约插件
    适配 Visametric Ireland -> Germany 流程
    """

    def __init__(self, group_id: str):
        self.group_id = group_id
        self.config: Optional[VSPlgConfig] = None
        self.free_config: Dict[str, Any] = {}
        self.logger = None
        self.session: Optional[requests.Session] = None
        
        # 状态
        self.is_healthy = True
        
        # 关键上下文变量 (从页面提取)
        self.base_url = "https://ie-appointment.visametric.com" 
        self.csrf_token = ""
        self.personal_info_val = ""
        self.email_val_control = ""
        
        # 默认 OCR 服务地址
        self.session_create_time: float = 0

    def get_group_id(self) -> str:
        return self.group_id
    
    def set_log(self, logger: Callable[[str], None]) -> None:
        self.logger = logger

    def set_config(self, config: VSPlgConfig):
        self.config = config
        self.free_config = config.free_config or {}
            
        if self.free_config.get("base_url"):
            self.base_url = self.free_config["base_url"].rstrip('/')

    def health_check(self) -> bool:
        if not self.is_healthy:
            return False
        if self.session is None:
            return False
        if self.config.session_max_life > 0:
            current_time = time.time()
            elapsed_time = current_time - self.session_create_time
            if elapsed_time > self.config.session_max_life * 60:
                self._log(f"Session Life ({int(elapsed_time)}s) out of max life limit ({self.config.session_max_life * 60}s), mark as unhealth session")
                return False
        return True

    def create_session(self):
        """
        初始化会话：过盾 -> 获取 CSRF -> 识别图片验证码 -> 提交验证码 -> 获取上下文
        """
        # 1. 初始化 Session
        curlopt = {
            const.CurlOpt.MAXAGE_CONN: 1800,
            const.CurlOpt.MAXLIFETIME_CONN: 1800,
            const.CurlOpt.VERBOSE: self.config.debug,
        }

        self.session = requests.Session(
            proxy=self._get_proxy_url(),
            impersonate="chrome124",
            curl_options=curlopt,
            use_thread_local_curl=False,
            http_version=const.CurlHttpVersion.V2TLS
        )
        self.ocr_engine = DddOcrEngine()
        # 2. 访问首页，获取 CSRF 和 Captcha 图片
        # Visametric 首页通常有 Cloudflare
        url_home = f"{self.base_url}/en"
        
        # 尝试过盾
        self._solve_cloudflare5S_challenge()

        default_headers = self._get_headers()
        default_headers.pop("X-Requested-With")
        
        resp = self._perform_request('GET', url_home, headers=default_headers)
        if self.config.debug:
            self._save_debug_html(resp.text, prefix="VisaMetric_Home_Page")
        html = resp.text
        soup = BeautifulSoup(html, 'html.parser')
        meta = soup.find('meta', {'name': 'csrf-token'})
        if not meta:
            raise NotFoundError(message='Missing csrf-token in html')
        self.csrf_token = meta.get('content', '')

        # 提取验证码图片 Base64, 正则匹配: "data:image/png;base64," + "..."
        match = re.search(r'"data:image/png;base64,"\s*\+\s*"(.*?)"', html)
        if not match:
            raise NotFoundError(message="Captcha image not found")
  
        captcha_b64 = base64.b64decode(match.group(1))
        
        captcha_code = self.ocr_engine.inference_captcha(captcha_b64)
        self._log(f"Captcha recognized: {captcha_code}")

        # 4. 提交验证码 (/appointment-form)
        # 这一步是为了让服务器验证 Session，并返回包含 personalinfo 的页面
        self._submit_captcha(captcha_code)
        self.session_create_time = time.time()
        self._log("Session created successfully.")

    def query(self, apt_type: AppointmentType) -> VSQueryResult:
        """
        查询可用日期 (/getdate)
        """
        res = VSQueryResult()
        res.apt_type = apt_type
        # 构造 Payload (参考 get_slot_day) 这里的 ID 需要根据实际情况配置
        consular_id = self.free_config.get("consularid", "1") # 1=Ireland?
        max_retries = self.free_config.get("slot_query_max_retries", 2)

        url = f"{self.base_url}/en/getdate"
        payload = {
            "consularid": consular_id,
            "exitid": "1",
            "servicetypeid": "1",
            "calendarType": "2",
            "totalperson": "1"
        }
        
        default_headers = self._get_headers()
        default_headers['X-CSRF-TOKEN'] = self.csrf_token
        
        
        for attempt in range(1, max_retries + 1):
            try:
                resp = self._perform_request('POST', url, data=payload, headers=default_headers)
                break  # ✅ 请求成功，跳出重试循环

            except PermissionDeniedError:
                self._log(f"Getdate blocked (403), attempt {attempt}/{max_retries}")

                # 最后一次就不再绕盾了
                if attempt >= max_retries:
                    raise PermissionDeniedError()

                self._solve_cloudflare5S_challenge()
                self._log("Cloudflare bypass success, retrying...")
                continue

        # Visametric 返回 JSON: {"getDateEnable": ["15-01-2026", "16-01-2026"]}
        j = resp.json()
        dates = j.get("getDateEnable", [])
        
        if dates:
            res.success = True
            res.availability_status = AvailabilityStatus.Available

            # Visametric 返回 DD-MM-YYYY → 标准化为 YYYY-MM-DD
            res.earliest_date = to_yyyymmdd(dates[0], "%d-%m-%Y")

            res.availability = [
                DateAvailability(
                    date=to_yyyymmdd(d, "%d-%m-%Y"),
                    times=[],
                )
                for d in dates
            ]

        else:
            # 查询成功，但没有可用日期
            res.success = False
            res.availability_status = AvailabilityStatus.NoneAvailable

        return res

    def book(self, slot_info: VSQueryResult, user_inputs: Dict) -> VSBookResult:
        """
        执行预约：选择日期 -> 选择时间 -> 发邮件 -> 填表 -> 提交
        """
        res = VSBookResult()
        # 1. 筛选日期
        available_dates = [da.date for da in slot_info.availability]
        exp_start = user_inputs.get('expected_start_date', '')
        exp_end = user_inputs.get('expected_end_date', '')
        
        valid_dates = self._filter_dates(available_dates, exp_start, exp_end)
        if not valid_dates:
            raise NotFoundError(message="No dates match user constraints")
        
        target_date = random.choice(valid_dates)
        self._log(f"Selected date: {target_date}")
        
        # 2. 获取时间 (/senddate)
        time_slot = self._get_slot_time(target_date)
        self._log(f"Selected time: {time_slot['time']}")

        # 3. 触发邮件流程 (Step 1: /jky45fgd)
        alias_email = get_alias_email(user_inputs.get("email"), new_domain='gmail-app.com')
        self._send_email_step1(alias_email)
            
        # 4. 触发邮件流程 (Step 2: /confirmCodeSendMail) 这一步会发送包含验证码的邮件 根据原代码逻辑: send_email("0") 触发发送
        self._send_email_step2("0")

        # 5. 读取 OTP
        # Visametric 邮件发送者
        recipient = alias_email
        otp_code = self._read_otp_email(recipient)
            
        # 6. 提交验证码并确认 (/personal/appointment/create)
        book_res_html = self._confirm_appointment(target_date, time_slot, user_inputs, otp_code, alias_email)
            
        if "complete all required fields" in book_res_html.lower():
            raise BizLogicError(message='Comfirm appointment response <complete all required fields>')
    
        # 7. 提取结果
        match = re.search(r'https:\/\/checkout\.stripe\.com\/c\/pay\/[^\s"]+', book_res_html)
        
        
        res.success = True
        res.fee_amount = 3000
        res.fee_currency = 'EUR'
        res.book_date = target_date
        res.book_time = time_slot['time']
        
        if match:
            res.payment_link = match.group(0)
            self._log(f"Payment Link Found: {res.payment_link}")
        return res

    # ---------------------------------------------------------
    # 辅助方法
    # ---------------------------------------------------------
    def _log(self, message):
        if self.logger:
            self.logger(f'[DePlugin] [{self.group_id}] {message}')
    
    def _get_headers(self) -> Dict[str, str]:
        """基础 Header"""
        return {
            "Accept": "*/*",
            "Accept-Language": "en,zh-CN;q=0.9,zh;q=0.8",
            "Origin": self.base_url,
            "Referer": f"{self.base_url}/en/appointment-form", # 默认 Referer
            "X-Requested-With": "XMLHttpRequest"
        }
        
    def _get_proxy_url(self):
        # 构造代理
        proxy_url = ""
        if self.config.proxy.ip:
            s = self.config.proxy
            if s.username:
                proxy_url = f"{s.scheme}://{s.username}:{s.password}@{s.ip}:{s.port}"
            else:
                proxy_url = f"{s.scheme}://{s.ip}:{s.port}"
        return proxy_url
    
    def _save_debug_html(self, content: str, prefix: str = "debug"):
        save_dir = "debug_pages"
        if not os.path.exists(save_dir):
            os.makedirs(save_dir)
        timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
        filename = f"{save_dir}/{prefix}_{timestamp}.html"
        with open(filename, "w", encoding="utf-8") as f:
            f.write(content)
        self._log(f"HTML saved to: {filename}")

    def _submit_captcha(self, code):
        url = f"{self.base_url}/en/appointment-form"
        payload = {
            '_token': self.csrf_token,
            'cpJvnsControl': '',
            'mailConfirmCode': code
        }
        headers = self._get_headers()
        headers['Content-Type'] = 'application/x-www-form-urlencoded; charset=UTF-8'
        
        resp = self._perform_request('POST', url, data=payload, headers=headers)
        if self.config.debug:
            self._save_debug_html(resp.text, prefix="VisaMetric_Make_Appointment_Page")
        # 关键：提交验证码后，返回的 HTML 中包含了后续需要的加密参数        
        match_pi = re.search(r"personalinfo:\s*'([^']*)'", resp.text)
        if match_pi:
            self.personal_info_val = match_pi.group(1)
        
        # emailValControl: '...'
        match_ev = re.search(r"emailValControl:\s*'([^']*)'", resp.text)
        if match_ev:
            self.email_val_control = match_ev.group(1)
            
        if not self.personal_info_val:
            raise NotFoundError(message="Personalinfo not found in captcha response")
        
        soup = BeautifulSoup(resp.text, 'html.parser')
        meta = soup.find('meta', {'name': 'csrf-token'})
        if not meta:
            raise NotFoundError(message='Missing csrf-token in html')
        self.csrf_token = meta.get('content', '')
   
    def _get_slot_time(self, date) -> Optional[Dict]:
        url = f"{self.base_url}/en/senddate"
        dt_m = datetime.strptime(date, "%Y-%m-%d")
        converted_date = dt_m.strftime("%d-%m-%Y")
        payload = {
            "fulldate": converted_date,
            "totalperson": "1",
            "set_new_consular_id": self.free_config.get("consularid", "1"),
            "set_new_exit_office_id": "1",
            "calendarType": "2",
            "set_new_service_type_id": "1",
            "personalinfo": self.personal_info_val
        }
        headers = self._get_headers()
        headers['X-CSRF-TOKEN'] = self.csrf_token # 这里需要 CSRF
        headers['Content-Type'] = 'application/x-www-form-urlencoded; charset=UTF-8'
        
        resp = self._perform_request('POST', url, data=payload, headers=headers)
        soup = BeautifulSoup(resp.text, 'html.parser')
        buttons = soup.find_all('button')
        slots = []
        for btn in buttons:
            i_tag = btn.find('i')
            if i_tag:
                time_val = i_tag.next_sibling.strip()
                slots.append({
                    'time': time_val,
                    'data_id': btn.get('data-id'),
                    'data_all': btn.get('data-all')
                })
        if slots:
            return random.choice(slots)
        else:
            raise NotFoundError(message='Not slot time available')
   

    def _send_email_step1(self, email):
        url = f"{self.base_url}/en/jky45fgd"
        payload = {
            "emailCheck": email,
            "personalinfo": self.personal_info_val
        }
        headers = self._get_headers()
        headers['X-CSRF-TOKEN'] = self.csrf_token
        headers['Content-Type'] = 'application/x-www-form-urlencoded; charset=UTF-8'
        self._perform_request('POST', url, data=payload, headers=headers)
        

    def _send_email_step2(self, code_val):
        url = f"{self.base_url}/en/confirmCodeSendMail"
        payload = {
            "confirmCode": code_val,
            "emailValControl": self.email_val_control
        }
        headers = self._get_headers()
        headers['X-CSRF-TOKEN'] = self.csrf_token
        headers['Content-Type'] = 'application/x-www-form-urlencoded; charset=UTF-8'
        self._perform_request('POST', url, data=payload, headers=headers)
    
    def _read_otp_email(self, recipient) -> str:
        """
        读取 OTP 邮件
        """
        master_email = "visafly666@gmail.com"
        sender = 'Visametric - verify at visametric.com'
        subject_keywords = 'Verification Code'
        body_keywords = 'Verification code'

        now_utc = datetime.utcnow()
        formatted_utc_time = now_utc.strftime("%Y-%m-%d %H:%M:%S")

        self._log(f"Waiting for OTP email sent after {formatted_utc_time}...")

        # 3. 轮询查收
        for i in range(12):
            content_out = VSCloudApi.Instance().fetch_mail_content(
                master_email,
                sender,
                recipient,
                subject_keywords,
                body_keywords,
                formatted_utc_time,
                300
            )

            if content_out:
                match = re.search(r'\b\d{6}\b', content_out)
                if match:
                    otp = match.group(0)
                    self._log(f"OTP code found: {otp}")
                    return otp
            
            time.sleep(5)
        raise NotFoundError(message="OTP email not found (timeout)")

    def _confirm_appointment(self, date, slot_data, user_inputs, otp, alias_email):
        url = f"{self.base_url}/en/personal/appointment/create"
        
        # 处理日期格式 YYYY-MM-DD
        def _get_dob(d_str):
            try: return datetime.strptime(d_str[:10], "%Y-%m-%d")
            except: return datetime.now()
            
        dob = _get_dob(user_inputs.get('birthday', ''))
        
        payload = {
            "_token": self.csrf_token,
            "country": str(self.free_config.get("consularid", "1")),
            "visitingcountry": str(self.free_config.get("consularid", "1")),
            "city": "6", # Dublin? 需配置
            "office": "1",
            "officetype": "1",
            "totalPerson": "1",
            
            "name1": user_inputs.get('first_name', '').upper(),
            "surname1": user_inputs.get('last_name', '').upper(),
            "nationality1": "2", # 假设值
            
            "birthday1": str(dob.day),
            "birthmonth1": str(dob.month),
            "birthyear1": str(dob.year),
            
            "passport1": user_inputs.get('passport_no'),
            # 原代码 passport_expried 是 DD-MM-YYYY
            "passportExpirationDate1": datetime.strptime(user_inputs.get('passport_expiry_date', '')[:10], "%Y-%m-%d").strftime("%d-%m-%Y"),
            "email1": alias_email,
            "phone1": user_inputs.get('phone_no'),
            "alternativephone1": "",
            
            # 其他 person 留空
            "name2": "", "surname2": "", "nationality2": "0", "birthday2": "0", "birthmonth2": "0", "birthyear2": "0", "passport2": "", "passportExpirationDate2": "", "email2": alias_email, "phone2": user_inputs.get('phone_no'), "alternativephone2": "",
            "name3": "", "surname3": "", "nationality3": "0", "birthday3": "0", "birthmonth3": "0", "birthyear3": "0", "passport3": "", "passportExpirationDate3": "", "email3": alias_email, "phone3": user_inputs.get('phone_no'), "alternativephone3": "",
            "name4": "", "surname4": "", "nationality4": "0", "birthday4": "0", "birthmonth4": "0", "birthyear4": "0", "passport4": "", "passportExpirationDate4": "", "email4": alias_email, "phone4": user_inputs.get('phone_no'), "alternativephone4": "",

            "mailConfirmCode": otp,
            "ctval": slot_data['data_id'],
            "qtallvert": slot_data['data_all'],
            
            "oldofficetype": "1",
            "oldtotalperson": "1",
            "rePaymentControl": "0",
            
            # 关键：View Set
            "view_set_app_country": "Schengen - Tourism/Family&Friend Visit/Transit Visa/Other Purposes", # 需配置
            "view_set_app_office": "Dublin",
            "view_set_app_service_type": "NORMAL",
            
            "cargoactive": "0",
            "setnewcalendarstatus": "2",
            "availableDaycontrol": "0",
            
            "travelStartDate": datetime.strptime(user_inputs.get('travel_date', '')[:10], "%Y-%m-%d").strftime("%d-%m-%Y"),
            "personalapproveTerms": "1"
        }
        
        headers = self._get_headers()
        headers['Content-Type'] = 'application/x-www-form-urlencoded; charset=UTF-8'
        
        resp = self._perform_request('POST', url, data=payload, headers=headers)
        return resp.text

    def _filter_dates(self, dates: List[str], start_str: str, end_str: str) -> List[str]:
        """
        根据用户的期望范围筛选可用日期
        
        :param dates: API 返回的可用日期列表 (YYYY-MM-DD)
        :param start_str: 用户期望开始日期 (YYYY-MM-DD)
        :param end_str: 用户期望结束日期 (YYYY-MM-DD)
        :return: 符合要求的日期列表
        """
        # 如果没有设置范围，则不过滤，返回所有日期
        if not start_str or not end_str:
            return dates
            
        valid_dates = []
        # 截取前10位以防带有时分秒
        s_date = datetime.strptime(start_str[:10], "%Y-%m-%d")
        e_date = datetime.strptime(end_str[:10], "%Y-%m-%d")
        
        for date_str in dates:
            curr_date = datetime.strptime(date_str, "%Y-%m-%d")
            # 比较范围 (闭区间)
            if s_date <= curr_date <= e_date:
                valid_dates.append(date_str)
        random.shuffle(valid_dates)
        return valid_dates
    
    def _perform_request(self, method, url, headers=None, data=None, json_data=None, params=None):
        """
        统一 HTTP 请求封装，严格复刻 C++ 逻辑：
        1. 发送 OPTIONS 请求
        2. 发送实际请求
        """
        resp = self.session.request(method, url, headers=headers, data=data, json=json_data, params=params, timeout=30)
        if self.config.debug:
            self._log(f'[perform request] Response={resp.text}\nMethod={method}, Url={url}, Data={data}, JsonData={json_data}, Params={params}')
        if resp.status_code == 200:
            return resp
        elif resp.status_code in [401, 419]:
            self.is_healthy = False
            raise SessionExpiredOrInvalidError()
        elif resp.status_code == 403:
            raise PermissionDeniedError()
        elif resp.status_code == 429:
            self.is_healthy = False
            raise RateLimiteddError()
        else:
            raise BizLogicError(message=f"HTTP Error {resp.status_code}: {resp.text[:100]}")

    def _solve_cloudflare5S_challenge(self):
        """
        解决 Cloudflare 5s 盾
        """
        self._log(f"Solving Cloudflare 5s...")
        website_url = f'{self.base_url}/en'
        
        # 1. 格式化代理字符串, 这里的接口要求格式通常是: host:port:user:pass (根据你的脚本示例)
        p = self.config.proxy
        if p.username:
            proxy_str = f"{p.ip}:{p.port}:{p.username}:{p.password}"
        else:
            proxy_str = f"{p.ip}:{p.port}"
        # 2. 提交任务
        task_id = VSCloudApi.Instance().create_task(
            command="AntiCloudflareTask",
            args={
                "proxy": proxy_str,
                "websiteUrl": website_url
            }
        )
        
        result_data = VSCloudApi.Instance().get_task_result(task_id, timeout=60)
        task_result = result_data.get("result", {})
        cookies_list = task_result.get('cookies', [])
        for cookie in cookies_list:
            if cookie['name'] in ['__cf_bm', 'cf_clearance']:
                self.session.cookies.set(
                    cookie['name'], 
                    cookie['value'], 
                    domain=cookie['domain'], 
                    path='/'
                )
        self.session.headers['User-Agent'] = task_result.get('userAgent')
        self._log("Cloudflare 5s challenge solved.")