"""Feed Pydantic schemas."""
from pydantic import BaseModel, ConfigDict, Field, HttpUrl


class FeedBase(BaseModel):
    """Base feed schema."""

    url: HttpUrl
    title: str | None = Field(default="", max_length=512)
    description: str | None = ""
    category: str | None = Field(default="", max_length=128)
    is_active: bool = True
    fetch_interval_minutes: int = Field(default=60, ge=15)
    priority: int = Field(default=5, ge=1, le=10)
    parser_config: dict = {}
    proxy_policy: str = "auto"


class FeedCreate(FeedBase):
    """Feed creation schema."""

    pass


class FeedUpdate(BaseModel):
    """Feed update schema."""

    title: str | None = Field(default=None, max_length=512)
    description: str | None = None
    category: str | None = Field(default=None, max_length=128)
    is_active: bool | None = None
    fetch_interval_minutes: int | None = Field(default=None, ge=15)
    priority: int | None = Field(default=None, ge=1, le=10)
    parser_config: dict | None = None
    proxy_policy: str | None = None


class FeedOut(FeedBase):
    """Feed output schema."""

    model_config = ConfigDict(from_attributes=True)

    id: str
    last_fetch_at: str | None = None
    last_fetch_status: str | None = None
    last_error: str | None = None
    error_type: str | None = None
    success_count: int = 0
    fail_count: int = 0
    article_count: int = 0
    health_status: str = "unknown"
    created_at: str
    updated_at: str

    @classmethod
    def model_validate(cls, obj):
        """Override to compute health_status and format datetimes."""
        data = {}
        for key in obj.__dict__:
            value = getattr(obj, key)
            if key in ("created_at", "updated_at", "last_fetch_at") and value is not None:
                data[key] = value.isoformat()
            else:
                data[key] = value
        data["health_status"] = obj.health_status()
        return cls.model_construct(**data)