from pydantic import BaseModel, EmailStr, Field
from typing import Optional, List
from datetime import datetime
from uuid import UUID


# ============================================
# User Schemas
# ============================================
class UserBase(BaseModel):
    email: EmailStr


class UserCreate(UserBase):
    pass


class User(UserBase):
    id: UUID
    created_at: datetime

    class Config:
        from_attributes = True


# ============================================
# Event Schemas
# ============================================
class EventBase(BaseModel):
    name: str
    date: Optional[datetime] = None
    location: Optional[str] = None
    partner1_name: Optional[str] = None
    partner2_name: Optional[str] = None
    venue: Optional[str] = None
    event_time: Optional[str] = None
    guest_link: Optional[str] = None


class EventCreate(EventBase):
    pass


class EventUpdate(BaseModel):
    name: Optional[str] = None
    date: Optional[datetime] = None
    location: Optional[str] = None
    partner1_name: Optional[str] = None
    partner2_name: Optional[str] = None
    venue: Optional[str] = None
    event_time: Optional[str] = None
    guest_link: Optional[str] = None


class Event(EventBase):
    id: UUID
    created_at: datetime
    updated_at: Optional[datetime] = None

    class Config:
        from_attributes = True


class EventWithMembers(Event):
    members: List["EventMember"] = []


# ============================================
# Event Member Schemas
# ============================================
class EventMemberBase(BaseModel):
    role: str = "admin"  # admin, editor, viewer
    display_name: Optional[str] = None


class EventMemberCreate(BaseModel):
    user_email: str = Field(..., description="Email address of the user to invite")
    role: str = "admin"
    display_name: Optional[str] = None


class EventMember(EventMemberBase):
    id: UUID
    event_id: UUID
    user_id: UUID
    created_at: datetime
    user: Optional[User] = None

    class Config:
        from_attributes = True


# ============================================
# Guest Schemas
# ============================================
class GuestBase(BaseModel):
    first_name: str
    last_name: str
    email: Optional[str] = None
    phone_number: Optional[str] = None
    rsvp_status: str = "invited"  # invited, confirmed, declined
    meal_preference: Optional[str] = None
    has_plus_one: bool = False
    plus_one_name: Optional[str] = None
    table_number: Optional[str] = None
    side: Optional[str] = None  # e.g., "groom side", "bride side"
    notes: Optional[str] = None


class GuestCreate(GuestBase):
    pass


class GuestUpdate(BaseModel):
    first_name: Optional[str] = None
    last_name: Optional[str] = None
    email: Optional[str] = None
    phone_number: Optional[str] = None
    rsvp_status: Optional[str] = None
    meal_preference: Optional[str] = None
    has_plus_one: Optional[bool] = None
    plus_one_name: Optional[str] = None
    table_number: Optional[str] = None
    side: Optional[str] = None
    notes: Optional[str] = None


class Guest(GuestBase):
    id: UUID
    event_id: UUID
    added_by_user_id: UUID
    owner_email: Optional[str] = None
    source: str = "manual"
    created_at: datetime
    updated_at: Optional[datetime] = None

    class Config:
        from_attributes = True


# ============================================
# Bulk Import Schemas
# ============================================
class GuestImportItem(BaseModel):
    first_name: str
    last_name: str
    email: Optional[str] = None
    phone_number: Optional[str] = None
    side: Optional[str] = None
    notes: Optional[str] = None


class GuestBulkImport(BaseModel):
    guests: List[GuestImportItem]


# ============================================
# Filter/Search Schemas
# ============================================
class GuestFilter(BaseModel):
    search: Optional[str] = None
    side: Optional[str] = None
    status: Optional[str] = None
    added_by: Optional[str] = None  # "me" for current user


# ============================================
# WhatsApp Schemas
# ============================================
class WhatsAppMessage(BaseModel):
    message: str
    phone: Optional[str] = None  # Optional: override guest's phone


class WhatsAppStatus(BaseModel):
    message_id: str
    status: str
    timestamp: datetime


class WhatsAppWeddingInviteRequest(BaseModel):
    """Request to send wedding invitation template to guest(s)"""
    guest_ids: Optional[List[str]] = None  # For bulk sending
    phone_override: Optional[str] = None   # Optional: override phone number
    
    class Config:
        from_attributes = True


class WhatsAppSendResult(BaseModel):
    """Result of sending WhatsApp message to a guest"""
    guest_id: str
    guest_name: Optional[str] = None
    phone: str
    status: str  # "sent", "failed"
    message_id: Optional[str] = None
    error: Optional[str] = None
    
    class Config:
        from_attributes = True


class WhatsAppBulkResult(BaseModel):
    """Result of bulk WhatsApp sending"""
    total: int
    succeeded: int
    failed: int
    results: List[WhatsAppSendResult]
    
    class Config:
        from_attributes = True


# ============================================
# Google Contacts Import Schema
# ============================================
class GoogleContactsImport(BaseModel):
    access_token: str
    owner: Optional[str] = "Google Import"


# ============================================
# Public Guest Self-Service Schema
# ============================================
class GuestPublicUpdate(BaseModel):
    """Schema for public guest self-service updates (phone-based lookup)"""
    first_name: Optional[str] = None
    last_name: Optional[str] = None
    rsvp_status: Optional[str] = None
    meal_preference: Optional[str] = None
    has_plus_one: Optional[bool] = None
    plus_one_name: Optional[str] = None