from datetime import datetime

from pydantic import BaseModel, ConfigDict, Field

from app.chats.models import ChatMemberRole, ChatType


class ChatRead(BaseModel):
    model_config = ConfigDict(from_attributes=True)

    id: int
    type: ChatType
    title: str | None = None
    display_title: str | None = None
    handle: str | None = None
    description: str | None = None
    is_public: bool = False
    is_saved: bool = False
    unread_count: int = 0
    pinned_message_id: int | None = None
    members_count: int | None = None
    online_count: int | None = None
    subscribers_count: int | None = None
    counterpart_user_id: int | None = None
    counterpart_name: str | None = None
    counterpart_username: str | None = None
    counterpart_is_online: bool | None = None
    counterpart_last_seen_at: datetime | None = None
    my_role: ChatMemberRole | None = None
    created_at: datetime


class ChatMemberRead(BaseModel):
    model_config = ConfigDict(from_attributes=True)

    id: int
    user_id: int
    role: ChatMemberRole
    joined_at: datetime


class ChatDetailRead(ChatRead):
    members: list[ChatMemberRead]


class ChatCreateRequest(BaseModel):
    type: ChatType
    title: str | None = Field(default=None, max_length=255)
    handle: str | None = Field(default=None, max_length=64)
    description: str | None = Field(default=None, max_length=512)
    is_public: bool = False
    member_ids: list[int] = Field(default_factory=list)


class ChatMemberAddRequest(BaseModel):
    user_id: int


class ChatMemberRoleUpdateRequest(BaseModel):
    role: ChatMemberRole


class ChatTitleUpdateRequest(BaseModel):
    title: str = Field(min_length=1, max_length=255)


class ChatPinMessageRequest(BaseModel):
    message_id: int | None = None


class ChatDeleteRequest(BaseModel):
    for_all: bool = False


class ChatDiscoverRead(ChatRead):
    is_member: bool