from pydantic import BaseModel, field_validator
from typing import Optional
from datetime import datetime, timezone


class ReservationCreate(BaseModel):
    guest_name: str
    party_size: int
    phone: Optional[str] = None
    email: Optional[str] = None
    note: Optional[str] = None
    reserved_for: datetime
    table_id: Optional[int] = None
    source: str = "manager_app"
    online_customer_id: Optional[str] = None

    @field_validator("reserved_for", mode="before")
    @classmethod
    def strip_timezone(cls, v):
        if isinstance(v, str):
            dt = datetime.fromisoformat(v.replace("Z", "+00:00"))
        elif isinstance(v, datetime):
            dt = v
        else:
            return v
        # Store as naive local — strip any tz info so SQLite keeps it as-is
        if dt.tzinfo is not None:
            dt = dt.astimezone().replace(tzinfo=None)
        return dt


class ReservationUpdate(BaseModel):
    guest_name: Optional[str] = None
    party_size: Optional[int] = None
    phone: Optional[str] = None
    email: Optional[str] = None
    note: Optional[str] = None
    reserved_for: Optional[datetime] = None
    table_id: Optional[int] = None
    status: Optional[str] = None

    @field_validator("reserved_for", mode="before")
    @classmethod
    def strip_timezone(cls, v):
        if v is None:
            return v
        if isinstance(v, str):
            dt = datetime.fromisoformat(v.replace("Z", "+00:00"))
        elif isinstance(v, datetime):
            dt = v
        else:
            return v
        if dt.tzinfo is not None:
            dt = dt.astimezone().replace(tzinfo=None)
        return dt


class ReservationStatusUpdate(BaseModel):
    status: str  # arrived | cancelled | no_show | pending


class ReservationOut(BaseModel):
    id: int
    guest_name: str
    party_size: int
    phone: Optional[str] = None
    email: Optional[str] = None
    note: Optional[str] = None
    reserved_for: datetime
    table_id: Optional[int] = None
    status: str
    source: str
    created_by_user_id: Optional[int] = None
    online_customer_id: Optional[str] = None
    created_at: datetime
    updated_at: datetime

    # Denormalized for convenience
    table_label: Optional[str] = None
    created_by_name: Optional[str] = None

    model_config = {"from_attributes": True}


# Compact summary embedded in TableOut for the RESERVED badge
class ReservationSummary(BaseModel):
    id: int
    guest_name: str
    party_size: int
    reserved_for: datetime
    status: str

    model_config = {"from_attributes": True}