"""
User schemas for request/response validation.
Defines Pydantic models for user management and statistics.
"""
from pydantic import BaseModel, Field
from typing import Optional, List
from datetime import datetime


class TaskStats(BaseModel):
    """用户任务统计信息"""
    assigned_count: int = Field(default=0, description="已分配任务数")
    completed_count: int = Field(default=0, description="已完成任务数")
    in_progress_count: int = Field(default=0, description="进行中任务数")
    pending_count: int = Field(default=0, description="待处理任务数")
    annotation_count: int = Field(default=0, description="标注数据条数")
    completion_rate: float = Field(default=0.0, description="完成率")


class UserResponse(BaseModel):
    """用户基本信息响应"""
    id: str = Field(..., description="用户ID")
    username: str = Field(..., description="用户名")
    email: str = Field(..., description="邮箱")
    role: str = Field(..., description="用户角色")
    created_at: datetime = Field(..., description="创建时间")
    
    class Config:
        from_attributes = True


class UserWithStatsResponse(UserResponse):
    """带统计信息的用户响应"""
    task_stats: TaskStats = Field(default_factory=TaskStats, description="任务统计")


class AssignableUserResponse(BaseModel):
    """可分配用户响应（用于任务分配）"""
    id: str = Field(..., description="用户ID")
    username: str = Field(..., description="用户名")
    email: str = Field(..., description="邮箱")
    current_task_count: int = Field(default=0, description="当前任务数")
    completed_task_count: int = Field(default=0, description="已完成任务数")


class UserListResponse(BaseModel):
    """用户列表响应"""
    users: List[UserWithStatsResponse] = Field(..., description="用户列表")
    total: int = Field(..., description="总数")


class UserStatsResponse(BaseModel):
    """用户详细统计响应"""
    user: UserResponse = Field(..., description="用户信息")
    task_stats: TaskStats = Field(..., description="任务统计")
    recent_tasks: List[dict] = Field(default_factory=list, description="最近任务")