from __future__ import annotations

from datetime import datetime

from pydantic import BaseModel


class CreditSubscriptionPeriodOut(BaseModel):
    id: str
    sequence: int
    scheduled_at: datetime
    valid_from: datetime
    expires_at: datetime
    grant_credits: float
    allocated_paid_amount: float
    status: str
    issued_balance_id: str | None = None
    issued_at: datetime | None = None

    model_config = {"from_attributes": True}


class CreditSubscriptionOut(BaseModel):
    id: str
    product_id: str | None = None
    payment_order_id: str
    status: str
    purchase_scene: str
    tier_code: str
    tier_rank: int
    billing_cycle: str
    anchor_at: datetime
    start_at: datetime
    expires_at: datetime
    next_grant_at: datetime | None = None
    monthly_grant_credits_snapshot: float
    grant_count: int
    granted_count: int
    paid_amount_snapshot: float
    source_subscription_id: str | None = None
    periods: list[CreditSubscriptionPeriodOut] = []

    model_config = {"from_attributes": True}