from datetime import datetime
from typing import Optional

from pydantic import BaseModel, ConfigDict, Field


class ChargeRequestCreate(BaseModel):
    requested_amount: int = Field(..., gt=0, le=10000, description="요청 크레딧 수량")
    message: Optional[str] = Field(None, max_length=500, description="요청 메시지")

    model_config = {
        "json_schema_extra": {
            "example": {
                "requested_amount": 10,
                "message": "크레딧 충전 요청합니다.",
            }
        }
    }


class ChargeRequestResponse(BaseModel):
    id: int
    user_uuid: str
    requested_amount: int
    message: Optional[str]
    status: str
    admin_note: Optional[str]
    processed_at: Optional[datetime]
    created_at: datetime
    updated_at: datetime

    model_config = ConfigDict(from_attributes=True)


class ChargeRequestListResponse(BaseModel):
    items: list[ChargeRequestResponse]
    total: int
    page: int
    page_size: int


class CreditTransactionResponse(BaseModel):
    id: int
    user_uuid: str
    amount: int
    balance_after: int
    type: str
    reason: Optional[str]
    related_request_id: Optional[int]
    created_at: datetime

    model_config = ConfigDict(from_attributes=True)


class CreditTransactionListResponse(BaseModel):
    items: list[CreditTransactionResponse]
    total: int
    page: int
    page_size: int