import os
import time
import json
import threading
import random
from datetime import datetime
from typing import List, Dict, Callable, Optional

from vs_types import GroupConfig, VSPlgConfig, Task, VSQueryResult, AppointmentType, AvailabilityStatus
from vs_plg_factory import VSPlgFactory
from toolkit.thread_pool import ThreadPool
from toolkit.vs_cloud_api import VSCloudApi
from utils.safe_redis_cli import SafeRedisClient


class BaseBookerGCO:
    """
    Booker 基类，封装公共的基础设施与通用的生命周期管理、逻辑循环等。
    """
    TAG = "BOOKER"

    def __init__(self, cfg: GroupConfig, redis_conf: Dict, logger: Callable[[str], None] = None):
        self.m_cfg = cfg
        self.m_factory = VSPlgFactory()
        self.m_logger = logger
        self.m_tasks: List[Task] = []
        self.m_lock = threading.RLock()
        self.m_stop_event = threading.Event()
        self.redis_client = SafeRedisClient(redis_conf, self.m_logger)
        self.m_tracker_key = f"vs:worker:tasks_tracker:{self.m_cfg.identifier}"

    def _log(self, message: str):
        prefix = f'[{self.TAG}] [{self.m_cfg.identifier}]'
        if self.m_logger:
            self.m_logger(f'{prefix} {message}')
        else:
            print(f'{prefix} {message}')

    def start(self):
        if not self.m_cfg.enable:
            return
        self._log(f"Starting {self.TAG}...")
        plugin_name = self.m_cfg.plugin_config.plugin_name
        class_name = "".join(part.title() for part in plugin_name.split('_'))
        plugin_path = os.path.join(self.m_cfg.plugin_config.lib_path, self.m_cfg.plugin_config.plugin_bin)
        self.m_factory.register_plugin(plugin_name, plugin_path, class_name)

        threading.Thread(target=self._booking_trigger_loop, daemon=True).start()
        threading.Thread(target=self._creator_loop, daemon=True).start()
        threading.Thread(target=self._maintain_loop, daemon=True).start()
        self._start_additional_threads()

    def _start_additional_threads(self):
        """子类扩展线程的 Hook"""
        pass

    def stop(self):
        self._log("Stopping Booker...")
        self.m_stop_event.set()
        self._cleanup_all_tasks("booker stop")

    def update_config(self, new_cfg: GroupConfig):
        """动态更新配置"""
        with self.m_lock:
            if self.m_cfg.enable and not new_cfg.enable:
                self._log("Config dynamically updated: Group DISABLED. Will stop creating new tasks.")
            elif not self.m_cfg.enable and new_cfg.enable:
                self._log("Config dynamically updated: Group ENABLED.")
            else:
                self._log("Config dynamically updated: Parameters refreshed.")
                
            self.m_cfg = new_cfg

    def _cleanup_task(self, task: Task, reason: str = ""):
        try:
            if task and task.instance:
                task.instance.cleanup()
                ref_str = f" for task={task.task_ref}" if task.task_ref else ""
                self._log(f"🧹 Cleaned up instance{ref_str}. Reason: {reason}")
        except Exception as e:
            self._log(f"Cleanup failed for instance. Reason: {reason}. Error: {e}")

    def _remove_task(self, task: Task, reason: str = "", cleanup: bool = True):
        removed = False
        with self.m_lock:
            if task in self.m_tasks:
                self.m_tasks.remove(task)
                removed = True
            self._on_task_removed(task)
                
        if cleanup and removed:
            self._cleanup_task(task, reason)
        return removed

    def _on_task_removed(self, task: Task):
        """子类在 task 被移除时的自定义 Hook（如清理缓存）"""
        pass

    def _cleanup_all_tasks(self, reason: str = ""):
        with self.m_lock:
            tasks = list(self.m_tasks)
            self.m_tasks.clear()
            self._on_all_tasks_cleaned()
        for task in tasks:
            self._cleanup_task(task, reason)

    def _on_all_tasks_cleaned(self):
        """子类在所有 task 被清空时的自定义 Hook"""
        pass

    def _get_redis_key(self, routing_key: str) -> str:
        return f"vs:signal:{routing_key}"

    def _is_within_active_hours(self) -> bool:
        """判断当前是否在允许创建实例的时间段内"""
        start_str = self.m_cfg.active_time_start
        end_str = self.m_cfg.active_time_end
        current_bj_time = datetime.utcnow().time()
        start_time = datetime.strptime(start_str, "%H:%M").time()
        end_time = datetime.strptime(end_str, "%H:%M").time()
        return start_time <= current_bj_time <= end_time

    def _maintain_loop(self):
        self._log("Maintain loop started.")
        while not self.m_stop_event.is_set():
            try:
                time.sleep(1.0)
                with self.m_lock:
                    tasks_to_check = list(self.m_tasks)
                
                if not tasks_to_check:
                    continue
                
                dead_tasks = []
                healthy_tasks = []
                now = time.time()
                for t in tasks_to_check:
                    if now >= t.next_remote_ping:
                        t.instance.keep_alive()
                        if t.instance.health_check():
                            healthy_tasks.append(t)
                            t.next_remote_ping = now + random.gauss(self.m_cfg.booker.keep_alive, 5)
                        else:
                            dead_tasks.append(t)
                    else:
                        healthy_tasks.append(t)
                
                self._on_maintain_ping(healthy_tasks, dead_tasks)

                if dead_tasks:
                    with self.m_lock:
                        current_tasks = list(self.m_tasks)
                        self.m_tasks = [t for t in self.m_tasks if t in healthy_tasks]
                    for t in dead_tasks:
                        if t in current_tasks:
                            self._cleanup_task(t, "unhealthy or keep-alive failed")
                else:
                    with self.m_lock:
                        self.m_tasks = [t for t in self.m_tasks if t in healthy_tasks]
            except Exception as e:
                self._log(f'Maintain loop exception: {e}')

    def _on_maintain_ping(self, healthy_tasks: List[Task], dead_tasks: List[Task]):
        """子类维护循环中对于健康/异常 Task 的额外处理"""
        pass

    def _is_date_of_interest(self, task: Task, query_result: VSQueryResult) -> bool:
        """判断 query_result 中的可用日期是否在 task 意向范围内（默认 True，Order 模式重写）"""
        return True

    def _booking_trigger_loop(self):
        self._log("Trigger loop started.")
        while not self.m_stop_event.is_set():
            try:
                time.sleep(0.1)
                now = time.time()
                for apt_type in self.m_cfg.appointment_types:
                    redis_key = self._get_redis_key(apt_type.routing_key)
                    raw_data = self.redis_client.get(redis_key)
                    if not raw_data:
                        continue
                    try:
                        data = json.loads(raw_data)
                        query_result = VSQueryResult.model_validate(data['query_result'])
                        query_result.apt_type = AppointmentType.model_validate(data['apt_type'])
                    except Exception as parse_err:
                        self._log(f"Data parsing error for {redis_key}: {parse_err}. Deleting corrupted signal.")
                        self.redis_client.delete(redis_key)
                        continue
                    
                    matching_tasks = []
                    with self.m_lock:
                        for task in self.m_tasks:
                            if now < task.next_run or not task.book_allowed:
                                continue
                            if apt_type.routing_key not in task.acceptable_routing_keys:
                                continue
                            if not self._is_date_of_interest(task, query_result):
                                continue
                            
                            task.next_run = now + self.m_cfg.booker.booking_cooldown
                            matching_tasks.append(task)
                            
                    if matching_tasks:
                        threads = []
                        for task in matching_tasks:
                            self._log(f"🚀 Triggering BOOK for {apt_type.routing_key} | Order Ref: {task.task_ref}")
                            t = threading.Thread(target=self._execute_book_job, args=(task, query_result))
                            threads.append(t)
                            t.start()
                        
                        for t in threads:
                            t.join() 
                    
            except Exception as e:
                self._log(f"Booking trigger loop exception: {e}")

    def _execute_book_job(self, task: Task, query_result: VSQueryResult):
        raise NotImplementedError

    def _creator_loop(self):
        raise NotImplementedError

    def _push_success_notification(self, task_id, order_id, book_res):
        """成功落单后同步云端与推送微信通知的公共方法"""
        grab_info = {
            "account": book_res.account,
            "session_id": book_res.session_id,
            "urn": book_res.urn,
            "slot_date": book_res.book_date,
            "slot_time": book_res.book_time,
            "timestamp": int(time.time()),
            "payment_link": book_res.payment_link
        }
        
        def _update_cloud_success():
            try:
                VSCloudApi.Instance().update_vas_task(str(task_id), {"status": "grabbed", "grabbed_history": grab_info})
                push_content = (
                    f"🎉 【预定成功通知】\n"
                    f"━━━━━━━━━━━━━━━\n"
                    f"订单编号: {order_id}\n"
                    f"预约账号: {book_res.account}\n"
                    f"预约日期: {book_res.book_date}\n"
                    f"预约时间: {book_res.book_time}\n"
                    f"预约编号: {book_res.urn}\n"
                    f"支付链接: {book_res.payment_link if book_res.payment_link else '无需支付/暂无'}\n"
                    f"━━━━━━━━━━━━━━━\n"
                )
                VSCloudApi.Instance().push_weixin_text(push_content)
            except Exception as e:
                self._log(f"Failed to update success state to cloud: {e}")

        ThreadPool.getInstance().enqueue(_update_cloud_success)
        self.redis_client.zrem(self.m_tracker_key, task_id)


class BuiltinBookerGCO(BaseBookerGCO):
    """
    非绑定模式 (公共内置账号池):
    - 只维护全局 target_instances 数量的实例。
    - 所有实例热机等待，发现信号后临时去云端 Pop 订单。
    """
    TAG = "BUILTIN-BOOKER"

    def _creator_loop(self):
        self._log("Creator loop started.")
        while not self.m_stop_event.wait(1.0):
            try:
                if not self._is_within_active_hours():
                    continue
                
                with self.m_lock:
                    current = len(self.m_tasks)
                    target = self.m_cfg.booker.target_instances
                if current < target:
                    self._spawn_worker()
            except Exception as e:
                self._log(f'Creator loop exception: {e}')

    def _spawn_worker(self):
        instance = None
        success = False
        plg_cfg = None
        
        try:
            plg_cfg = VSPlgConfig()
            plg_cfg.debug = self.m_cfg.debug
            plg_cfg.free_config = self.m_cfg.free_config
            plg_cfg.session_max_life = self.m_cfg.session_max_life

            if self.m_cfg.need_account:
                acc = VSCloudApi.Instance().get_next_account(self.m_cfg.booker.account_pool_id, self.m_cfg.booker.account_cd)
                plg_cfg.account = type(plg_cfg.account)(**acc)

            if self.m_cfg.need_proxy:
                proxy = VSCloudApi.Instance().get_next_proxy(self.m_cfg.proxy_pool, self.m_cfg.proxy_cd)
                plg_cfg.proxy = type(plg_cfg.proxy)(**proxy)

            instance = self.m_factory.create(self.m_cfg.identifier, self.m_cfg.plugin_config.plugin_name)
            instance.set_log(self.m_logger)
            instance.set_config(plg_cfg)
            instance.create_session()
            success = True
            with self.m_lock:
                all_keys = [apt.routing_key for apt in self.m_cfg.appointment_types]
                self.m_tasks.append(
                    Task(
                        instance=instance,
                        next_run=time.time(), 
                        task_ref=None,
                        acceptable_routing_keys=all_keys,
                        source_queue="built-in",
                        book_allowed=True,
                        next_remote_ping=time.time() + random.gauss(self.m_cfg.booker.keep_alive, 5) 
                    )
                )
            success = True
            self._log(f"+++ Built-in Booker spawned: {plg_cfg.account.username}")
        except Exception as e:
            err_str = str(e)
            self._log(f"Spawn failed: {err_str}")
            rate_limited_indicators = [
                "42901" in err_str,
                "Rate limited" in err_str
            ]
            if any(rate_limited_indicators):
                if plg_cfg and plg_cfg.account.username != "Guest":
                    VSCloudApi.lock_account(plg_cfg.account.id, self.m_cfg.login_backoff)
        finally:
            if not success:
                if instance:
                    instance.cleanup()

    def _execute_book_job(self, task: Task, query_result: VSQueryResult):
        queue_name = f"auto.{query_result.apt_type.routing_key}"

        task_id = None
        task_data = None
        
        try:
            task_data = VSCloudApi.Instance().get_vas_task_pop(queue_name)
            if not task_data:
                return 
            task_id = task_data['id']
            order_id = task_data.get('order_id')
            self.redis_client.zadd(self.m_tracker_key, {str(task_id): time.time() + 30.0})
                        
            user_input = task_data.get('user_inputs', {})
            book_res = task.instance.book(query_result, user_input)
            
            if book_res.success:
                self._log(f"✅ BOOK SUCCESS! Order: {order_id}")
                self._push_success_notification(task_id, order_id, book_res)
                
                task.successful_bookings += 1
                max_b = self.m_cfg.booker.max_bookings_per_account
                if max_b > 0 and task.successful_bookings >= max_b:
                    self._log(f"Account reached max bookings ({max_b}). Destroying instance.")
                    self._remove_task(task, "max bookings reached")
            else:
                self._log(f"❌ BOOK FAILED for Order: {order_id}")
        except Exception as e:
            err_str = str(e)
            self._log(f"Exception during booking: {err_str}")
            rate_limited_indicators = [
                "42901" in err_str,
                "Rate limited" in err_str
            ]
            if any(rate_limited_indicators):
                self._remove_task(task, "booking rate limited")


class OrderBookerGCO(BaseBookerGCO):
    """
    绑定模式 (订单自带账号):
    - 按城市队列维护热机配额。
    - 绝对的 1 对 1 关系：一个实例绑定一个云端订单。
    - 预订成功后，实例立即销毁。
    """
    TAG = "ORDER-BOOKER"

    def __init__(self, cfg: GroupConfig, redis_conf: Dict, logger: Callable[[str], None] = None):
        super().__init__(cfg, redis_conf, logger)
        self.m_task_data_cache: Dict[str, dict] = {}
        self.heartbeat_ttl = 2 * 60.0

    def _start_additional_threads(self):
        threading.Thread(target=self._cache_refresh_loop, daemon=True).start()

    def _on_task_removed(self, task: Task):
        task_id = task.task_ref
        if task_id:
            self.m_task_data_cache.pop(str(task_id), None)

    def _on_all_tasks_cleaned(self):
        self.m_task_data_cache.clear()

    def _on_maintain_ping(self, healthy_tasks: List[Task], dead_tasks: List[Task]):
        if healthy_tasks:
            new_deadline = time.time() + self.heartbeat_ttl
            mapping = {str(t.task_ref): new_deadline for t in healthy_tasks}
            self.redis_client.bulk_zadd(self.m_tracker_key, mapping)

        if dead_tasks:
            mapping = {str(t.task_ref): 0 for t in dead_tasks}
            self.redis_client.bulk_zadd(self.m_tracker_key, mapping)

    def _cache_refresh_loop(self):
        self._log("Cache refresh loop started.")
        refresh_interval = 15 * 60
        
        while not self.m_stop_event.is_set():
            try:
                time.sleep(1)
                with self.m_lock:
                    tasks_to_check = {
                        tid: data.get('_last_refresh', 0) 
                        for tid, data in self.m_task_data_cache.items()
                    }
                
                if not tasks_to_check:
                    continue
                
                now = time.time()
                for tid, last_refresh in tasks_to_check.items():
                    if now - last_refresh >= refresh_interval:
                        fresh_data = VSCloudApi.Instance().get_vas_task(tid)
                        if fresh_data:
                            fresh_data['_last_refresh'] = time.time()
                            
                            with self.m_lock:
                                if tid in self.m_task_data_cache:
                                    self.m_task_data_cache[tid] = fresh_data
                        time.sleep(0.5)
            except Exception as e:
                self._log(f'Cache refresh loop exception: {e}')

    def _is_date_of_interest(self, task: Task, query_result: VSQueryResult) -> bool:
        if query_result.availability_status != AvailabilityStatus.Available:
            return True
        task_id = task.task_ref
        task_data = self.m_task_data_cache.get(str(task_id), {})
        user_input = task_data.get('user_inputs', {})
        expected_end_date = (
            user_input.get('expected_end_date')
            or '2100-01-01'
        )
        available_date = query_result.earliest_date
        dt = available_date.strftime("%Y-%m-%d")
        return dt <= expected_end_date

    def _execute_book_job(self, task: Task, query_result: VSQueryResult):
        task_id = task.task_ref
        task_data = None

        try:
            with self.m_lock:
                task_data = self.m_task_data_cache.get(str(task_id))
            if not task_data or task_data.get('status') in ['grabbed', 'pause', 'completed', 'cancelled']:
                self._log(f"Bound Task={task_id} is no longer valid or already processed. Removing instance.")
                self._remove_task(task, "bound task no longer valid")
                self.redis_client.zrem(self.m_tracker_key, task_id)
                return
            
            order_id = task_data.get('order_id')
            user_input = task_data.get('user_inputs', {})
            book_res = task.instance.book(query_result, user_input)

            if book_res.success:
                self._log(f"✅ BOOK SUCCESS! Order: {order_id}. Destroying instance.")
                self._push_success_notification(task_id, order_id, book_res)
                self._remove_task(task, "booking success")
            else:
                self._log(f"❌ BOOK FAILED for Order: {order_id}. Will retry on next signal.")

        except Exception as e:
            err_str = str(e)
            self._log(f"Exception during booking: {err_str}")
            rate_limited_indicators = [
                "42901" in err_str,
                "Rate limited" in err_str
            ]
            if any(rate_limited_indicators):
                self._remove_task(task, "booking rate limited")

    def _creator_loop(self):
        self._log("Creator loop started.")
        while not self.m_stop_event.wait(1.0):
            try:
                if not self._is_within_active_hours():
                    continue
                for apt in self.m_cfg.appointment_types:
                    r_key = apt.routing_key
                    with self.m_lock:
                        active = sum(1 for t in self.m_tasks if t.source_queue == r_key)
                        target = self.m_cfg.booker.target_instances
                    if active < target:
                        self._spawn_worker(r_key)
            except Exception as e:
                self._log(f'Creator loop exception:{e}')

    def _spawn_worker(self, target_routing_key: str):
        instance = None
        success = False
        task_id = None
        try:
            queue_name = f"auto.{target_routing_key}"
            task_data = VSCloudApi.Instance().get_vas_task_pop(queue_name)
            if not task_data:
                return 
            
            task_id = task_data['id']
            
            with self.m_lock:
                self.m_task_data_cache[str(task_id)] = task_data
            
            self.redis_client.zadd(self.m_tracker_key, {str(task_id): time.time() + 8*60.0})
            user_inputs = task_data.get('user_inputs', {})
            
            plg_cfg = VSPlgConfig()
            plg_cfg.debug = self.m_cfg.debug
            plg_cfg.free_config = self.m_cfg.free_config
            plg_cfg.session_max_life = self.m_cfg.session_max_life
            plg_cfg.account.username = user_inputs.get("username", "")
            plg_cfg.account.password = user_inputs.get("password", "")
            if not plg_cfg.account.username:
                return
            
            acceptable_keys = [target_routing_key]
            if self.m_cfg.need_proxy:
                proxy = VSCloudApi.Instance().get_next_proxy(self.m_cfg.proxy_pool, self.m_cfg.proxy_cd)
                plg_cfg.proxy = type(plg_cfg.proxy)(**proxy)

            instance = self.m_factory.create(self.m_cfg.identifier, self.m_cfg.plugin_config.plugin_name)
            instance.set_log(self.m_logger)
            instance.set_config(plg_cfg)
            instance.create_session() 
            
            with self.m_lock:
                self.m_tasks.append(
                    Task(
                        instance=instance,
                        next_run=time.time(), 
                        task_ref=task_id,
                        acceptable_routing_keys=acceptable_keys, 
                        source_queue=target_routing_key,
                        book_allowed=True,
                        next_remote_ping=time.time() + random.gauss(self.m_cfg.booker.keep_alive, 5)
                    )
                )
            success = True             
            self._log(f"+++ Order Booker spawned: {plg_cfg.account.username} (Target: {acceptable_keys})")
        except Exception as e:
            err_str = str(e)
            self._log(f"Order Booker spawn failed: {err_str}")
            rate_limited_indicators = [
                "42901" in err_str,
                "Rate limited" in err_str
            ]
            if any(rate_limited_indicators):
                if task_id is not None:
                    self.redis_client.zadd(self.m_tracker_key, {str(task_id): time.time() + self.m_cfg.login_backoff})  
        
        finally:
            if not success:
                if task_id:
                    with self.m_lock:
                        self.m_task_data_cache.pop(str(task_id), None)
                if instance:
                    instance.cleanup()
