"""
Atlassian OAuth 2.0 Authentication Credentials Schema.

Shared schema for both Jira and Confluence OAuth credentials.
Both products use the same Atlassian OAuth 2.0 (3LO) flow and token structure.
"""

from datetime import UTC, datetime

from pydantic import BaseModel, field_validator


class AtlassianAuthCredentialsBase(BaseModel):
    """
    Base model for Atlassian OAuth 2.0 credentials.

    Used for both Jira and Confluence connectors since they share
    the same Atlassian OAuth infrastructure and token structure.
    """

    access_token: str
    refresh_token: str | None = None
    token_type: str = "Bearer"
    expires_in: int | None = None
    expires_at: datetime | None = None
    scope: str | None = None
    cloud_id: str | None = None
    base_url: str | None = None

    @property
    def is_expired(self) -> bool:
        """Check if the credentials have expired."""
        if self.expires_at is None:
            return False
        return self.expires_at <= datetime.now(UTC)

    @property
    def is_refreshable(self) -> bool:
        """Check if the credentials can be refreshed."""
        return self.refresh_token is not None

    def to_dict(self) -> dict:
        """Convert credentials to dictionary for storage."""
        return {
            "access_token": self.access_token,
            "refresh_token": self.refresh_token,
            "token_type": self.token_type,
            "expires_in": self.expires_in,
            "expires_at": self.expires_at.isoformat() if self.expires_at else None,
            "scope": self.scope,
            "cloud_id": self.cloud_id,
            "base_url": self.base_url,
        }

    @classmethod
    def from_dict(cls, data: dict) -> "AtlassianAuthCredentialsBase":
        """Create credentials from dictionary."""
        expires_at = None
        if data.get("expires_at"):
            expires_at = datetime.fromisoformat(data["expires_at"])

        return cls(
            access_token=data["access_token"],
            refresh_token=data.get("refresh_token"),
            token_type=data.get("token_type", "Bearer"),
            expires_in=data.get("expires_in"),
            expires_at=expires_at,
            scope=data.get("scope"),
            cloud_id=data.get("cloud_id"),
            base_url=data.get("base_url"),
        )

    @field_validator("expires_at", mode="before")
    @classmethod
    def ensure_aware_utc(cls, v):
        # Strings like "2025-08-26T14:46:57.367184"
        if isinstance(v, str):
            # add +00:00 if missing tz info
            if v.endswith("Z"):
                return datetime.fromisoformat(v.replace("Z", "+00:00"))
            dt = datetime.fromisoformat(v)
            return dt if dt.tzinfo else dt.replace(tzinfo=UTC)
        # datetime objects
        if isinstance(v, datetime):
            return v if v.tzinfo else v.replace(tzinfo=UTC)
        return v