from typing import Literal
from pydantic import BaseModel, Field
from uuid import UUID
from datetime import datetime, date, time

BookingStatus = Literal["pending", "confirmed", "cancelled", "completed", "no_show"]


class SlotCreate(BaseModel):
    date: date
    start_time: time
    end_time: time


class WeeklyScheduleCreate(BaseModel):
    day_of_week: int = Field(ge=0, le=6, description="0=Monday, 6=Sunday")
    start_time: time
    end_time: time
    slot_duration_minutes: int = Field(ge=15, le=480, default=60)


class WeeklyScheduleOut(BaseModel):
    id: UUID
    day_of_week: int
    start_time: time
    end_time: time
    slot_duration_minutes: int
    is_active: bool


class GenerateSlotsRequest(BaseModel):
    from_date: date
    to_date: date = Field(description="Max 90 days from from_date")


class SlotOut(BaseModel):
    id: UUID
    date: date
    start_time: time
    end_time: time
    is_blocked: bool
    block_reason: str | None = None
    is_booked: bool = False


class UpdateSlotRequest(BaseModel):
    is_blocked: bool
    block_reason: str | None = None


class BlockedDateCreate(BaseModel):
    date: date
    reason: str | None = None


class BlockedDateOut(BaseModel):
    id: UUID
    date: date
    reason: str | None = None


class BookingCreate(BaseModel):
    slot_id: UUID
    service_note: str | None = Field(None, max_length=500)
    # Guest fields — required when not authenticated
    guest_name: str | None = Field(None, max_length=100)
    guest_email: str | None = None
    guest_phone: str | None = None


class BookingOut(BaseModel):
    id: UUID
    user_id: UUID | None = None
    slot_id: UUID
    slot_date: date
    slot_start: str  # "HH:MM"
    slot_end: str    # "HH:MM"
    service_note: str | None = None
    # Resolved client info (from profile or guest fields)
    client_name: str | None = None
    client_email: str | None = None
    client_phone: str | None = None
    status: str
    amount_paid: float | None = None
    stripe_payment_intent_id: str | None = None
    admin_notes: str | None = None
    created_at: datetime
    updated_at: datetime


class BookingCheckoutResponse(BaseModel):
    booking_id: UUID
    client_secret: str
    amount: float


class UpdateBookingStatus(BaseModel):
    status: BookingStatus
    admin_notes: str | None = None