"""Pydantic 스키마 (요청/응답 직렬화)"""

from datetime import datetime
from typing import Optional
from pydantic import BaseModel, Field


# ━━━━━━━━ 충전기 ━━━━━━━━

class ChargerCreate(BaseModel):
    charge_box_id: str = Field(..., example="CHARGER_001")
    name: str = Field("", example="A동 주차장 1번")
    location: str = Field("", example="수원시 영통구 아파트 지하1층")
    connector_count: int = 1
    power_kw: float = 7.0


class ChargerOut(BaseModel):
    id: int
    charge_box_id: str
    name: str
    location: str
    connector_count: int
    power_kw: float
    status: str
    last_heartbeat: Optional[datetime] = None
    is_active: bool

    class Config:
        from_attributes = True


class ChargerStatusUpdate(BaseModel):
    status: str
    timestamp: Optional[datetime] = None


# ━━━━━━━━ 충전 세션 ━━━━━━━━

class SessionCreate(BaseModel):
    """QR 스캔 → 세션 생성 요청"""
    charge_box_id: str = Field(..., example="CHARGER_001")
    connector_id: int = 1


class SessionOut(BaseModel):
    id: int
    session_uid: str
    charger_id: int
    id_tag: Optional[str] = None
    status: str
    meter_start: Optional[int] = None
    meter_stop: Optional[int] = None
    charged_wh: int = 0
    total_bill: int = 0
    started_at: Optional[datetime] = None
    stopped_at: Optional[datetime] = None
    created_at: datetime

    class Config:
        from_attributes = True


class SessionBilling(BaseModel):
    """정산 결과"""
    session_uid: str
    charged_kwh: float
    electricity_cost: int
    service_fee: int
    total_bill: int
    saved_vs_cpo: int


# ━━━━━━━━ 결제 ━━━━━━━━

class PaymentRequest(BaseModel):
    """결제 시작 요청 (모바일 웹에서 호출)"""
    session_uid: str
    amount: int = Field(..., ge=100, example=10000, description="선결제 금액 (원)")


class PaymentConfirm(BaseModel):
    """토스페이먼츠 결제 승인 요청"""
    payment_key: str
    order_id: str
    amount: int


class PaymentOut(BaseModel):
    order_id: str
    payment_key: Optional[str] = None
    amount: int
    actual_amount: Optional[int] = None
    status: str
    method: Optional[str] = None
    confirmed_at: Optional[datetime] = None

    class Config:
        from_attributes = True


# ━━━━━━━━ Steve OCPP 콜백 ━━━━━━━━

class OcppBootNotification(BaseModel):
    charge_box_id: str
    charge_point_vendor: Optional[str] = None
    charge_point_model: Optional[str] = None
    firmware_version: Optional[str] = None


class OcppStatusNotification(BaseModel):
    charge_box_id: str
    connector_id: int = 1
    status: str  # Available, Charging, Faulted ...
    error_code: str = "NoError"
    timestamp: Optional[datetime] = None


class OcppStartTransaction(BaseModel):
    charge_box_id: str
    connector_id: int = 1
    id_tag: str
    meter_start: int  # Wh
    transaction_id: Optional[int] = None
    timestamp: Optional[datetime] = None


class OcppStopTransaction(BaseModel):
    charge_box_id: str
    transaction_id: int
    id_tag: Optional[str] = None
    meter_stop: int  # Wh
    reason: str = "Local"
    timestamp: Optional[datetime] = None


class OcppMeterValues(BaseModel):
    charge_box_id: str
    connector_id: int = 1
    transaction_id: Optional[int] = None
    value: float  # Wh
    measurand: str = "Energy.Active.Import.Register"
    timestamp: Optional[datetime] = None


# ━━━━━━━━ 대시보드 ━━━━━━━━

class DashboardSummary(BaseModel):
    total_chargers: int
    active_chargers: int
    charging_now: int
    today_sessions: int
    today_revenue: int
    today_kwh: float
    month_revenue: int
    month_kwh: float