from pydantic import BaseModel, Field, HttpUrl
from typing import Optional, List, Dict, Any
from datetime import datetime
from enum import Enum

class FeedStatus(str, Enum):
    ACTIVE = "active"
    INACTIVE = "inactive"
    ERROR = "error"

class FeedCategory(str, Enum):
    NEWS = "news"
    TECH = "tech"
    BUSINESS = "business"
    SCIENCE = "science"
    HEALTH = "health"
    SPORTS = "sports"
    ENTERTAINMENT = "entertainment"
    LIFESTYLE = "lifestyle"
    POLITICS = "politics"
    OTHER = "other"

class FeedSubscription(BaseModel):
    id: Optional[str] = Field(None, alias="_id")
    title: str
    url: HttpUrl
    description: Optional[str] = None
    category: FeedCategory = FeedCategory.OTHER
    status: FeedStatus = FeedStatus.ACTIVE
    update_interval: int = 900  # seconds
    last_fetch: Optional[datetime] = None
    last_error: Optional[str] = None
    error_count: int = 0
    created_at: datetime = Field(default_factory=datetime.now)
    updated_at: datetime = Field(default_factory=datetime.now)
    metadata: Dict[str, Any] = {}

class FeedEntry(BaseModel):
    id: Optional[str] = Field(None, alias="_id")
    feed_id: str
    entry_id: str  # RSS entry unique ID
    title: str
    link: str
    summary: Optional[str] = None
    content: Optional[str] = None
    author: Optional[str] = None
    published: Optional[datetime] = None
    updated: Optional[datetime] = None
    categories: List[str] = []
    thumbnail: Optional[str] = None
    enclosures: List[Dict[str, Any]] = []
    is_read: bool = False
    is_starred: bool = False
    created_at: datetime = Field(default_factory=datetime.now)

class CreateFeedRequest(BaseModel):
    url: HttpUrl
    title: Optional[str] = None
    category: FeedCategory = FeedCategory.OTHER
    update_interval: Optional[int] = 900

class UpdateFeedRequest(BaseModel):
    title: Optional[str] = None
    category: Optional[FeedCategory] = None
    update_interval: Optional[int] = None
    status: Optional[FeedStatus] = None

class FeedStatistics(BaseModel):
    feed_id: str
    total_entries: int
    unread_entries: int
    starred_entries: int
    last_update: Optional[datetime]
    error_rate: float