# -*- coding: utf-8 -*-
"""
平台发布基类
提供通用的发布接口和工具方法
"""

import asyncio
import json
import os
from abc import ABC, abstractmethod
from dataclasses import dataclass, field
from datetime import datetime
from typing import List, Optional, Callable
from playwright.async_api import async_playwright, Browser, BrowserContext, Page


@dataclass
class PublishParams:
    """发布参数"""
    title: str
    video_path: str
    description: str = ""
    cover_path: Optional[str] = None
    tags: List[str] = field(default_factory=list)
    publish_date: Optional[datetime] = None
    location: str = "重庆市"
    
    def __post_init__(self):
        if not self.description:
            self.description = self.title


@dataclass
class PublishResult:
    """发布结果"""
    success: bool
    platform: str
    video_id: str = ""
    video_url: str = ""
    message: str = ""
    error: str = ""


class BasePublisher(ABC):
    """
    平台发布基类
    所有平台发布器都需要继承此类
    """
    
    platform_name: str = "base"
    login_url: str = ""
    publish_url: str = ""
    cookie_domain: str = ""
    
    def __init__(self, headless: bool = True):
        self.headless = headless
        self.browser: Optional[Browser] = None
        self.context: Optional[BrowserContext] = None
        self.page: Optional[Page] = None
        self.on_progress: Optional[Callable[[int, str], None]] = None
    
    def set_progress_callback(self, callback: Callable[[int, str], None]):
        """设置进度回调"""
        self.on_progress = callback
    
    def report_progress(self, progress: int, message: str):
        """报告进度"""
        print(f"[{self.platform_name}] [{progress}%] {message}")
        if self.on_progress:
            self.on_progress(progress, message)
    
    @staticmethod
    def parse_cookies(cookies_str: str) -> list:
        """解析 cookie 字符串为列表"""
        try:
            cookies = json.loads(cookies_str)
            if isinstance(cookies, list):
                return cookies
        except json.JSONDecodeError:
            pass
        
        # 字符串格式: name=value; name2=value2
        cookies = []
        for item in cookies_str.split(';'):
            item = item.strip()
            if '=' in item:
                name, value = item.split('=', 1)
                cookies.append({
                    'name': name.strip(),
                    'value': value.strip(),
                    'domain': '',
                    'path': '/'
                })
        return cookies
    
    @staticmethod
    def cookies_to_string(cookies: list) -> str:
        """将 cookie 列表转换为字符串"""
        return '; '.join([f"{c['name']}={c['value']}" for c in cookies])
    
    async def init_browser(self, storage_state: str = None):
        """初始化浏览器"""
        playwright = await async_playwright().start()
        self.browser = await playwright.chromium.launch(headless=self.headless)
        
        if storage_state and os.path.exists(storage_state):
            self.context = await self.browser.new_context(storage_state=storage_state)
        else:
            self.context = await self.browser.new_context()
        
        self.page = await self.context.new_page()
        return self.page
    
    async def set_cookies(self, cookies: list):
        """设置 cookies"""
        if not self.context:
            raise Exception("Browser context not initialized")
        
        # 设置默认域名
        for cookie in cookies:
            if 'domain' not in cookie or not cookie['domain']:
                cookie['domain'] = self.cookie_domain
        
        await self.context.add_cookies(cookies)
    
    async def close_browser(self):
        """关闭浏览器"""
        if self.context:
            await self.context.close()
        if self.browser:
            await self.browser.close()
    
    async def save_cookies(self, file_path: str):
        """保存 cookies 到文件"""
        if self.context:
            await self.context.storage_state(path=file_path)
    
    async def wait_for_upload_complete(self, success_selector: str, timeout: int = 300):
        """等待上传完成"""
        if not self.page:
            raise Exception("Page not initialized")
        
        for _ in range(timeout // 3):
            try:
                count = await self.page.locator(success_selector).count()
                if count > 0:
                    return True
            except:
                pass
            await asyncio.sleep(3)
            self.report_progress(30, "正在上传视频...")
        
        return False
    
    @abstractmethod
    async def publish(self, cookies: str, params: PublishParams) -> PublishResult:
        """
        发布视频 - 子类必须实现
        
        Args:
            cookies: cookie 字符串或 JSON
            params: 发布参数
            
        Returns:
            PublishResult: 发布结果
        """
        pass
    
    async def run(self, cookies: str, params: PublishParams) -> PublishResult:
        """
        运行发布任务
        包装了 publish 方法，添加了异常处理和资源清理
        """
        try:
            return await self.publish(cookies, params)
        except Exception as e:
            import traceback
            traceback.print_exc()
            return PublishResult(
                success=False,
                platform=self.platform_name,
                error=str(e)
            )
        finally:
            await self.close_browser()