"""会话相关 Schema"""

from datetime import datetime

from pydantic import BaseModel, Field


class ConversationCreate(BaseModel):
    type: str = Field(..., pattern="^(private|group)$")
    name: str | None = Field(None, max_length=100)
    member_ids: list[str] = Field(..., min_length=1)


class ConversationRead(BaseModel):
    id: str
    type: str
    name: str | None = None
    avatar_url: str | None = None
    description: str | None = None
    last_message_preview: str | None = None
    last_message_at: datetime | None = None
    created_at: datetime
    unread_count: int = 0

    model_config = {"from_attributes": True}


class ConversationDetail(ConversationRead):
    members: list["MemberRead"] = []


class MemberRead(BaseModel):
    id: str
    user_id: str
    username: str
    nickname: str | None = None
    avatar_url: str | None = None
    role: str = "member"
    joined_at: datetime

    model_config = {"from_attributes": True}


class ConversationUpdate(BaseModel):
    name: str | None = Field(None, max_length=100)
    description: str | None = Field(None, max_length=500)
    avatar_url: str | None = None


class GroupCreate(BaseModel):
    name: str = Field(..., min_length=1, max_length=100)
    description: str | None = Field(None, max_length=500)
    member_ids: list[str] = Field(..., min_length=1)


class GroupUpdate(BaseModel):
    name: str | None = Field(None, max_length=100)
    description: str | None = Field(None, max_length=500)
    avatar_url: str | None = None


class MemberAdd(BaseModel):
    user_ids: list[str] = Field(..., min_length=1)


class RoleUpdate(BaseModel):
    role: str = Field(..., pattern="^(admin|member)$")