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


class UserTaskStats(BaseModel):
    """用户任务统计"""
    user_id: str = Field(..., description="用户ID")
    username: str = Field(..., description="用户名")
    assigned_tasks: int = Field(default=0, description="已分配任务数")
    completed_tasks: int = Field(default=0, description="已完成任务数")
    in_progress_tasks: int = Field(default=0, description="进行中任务数")
    pending_tasks: 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 ProjectStatisticsResponse(BaseModel):
    """项目统计响应"""
    project_id: str = Field(..., description="项目ID")
    project_name: str = Field(..., description="项目名称")
    
    # 任务统计
    total_tasks: int = Field(default=0, description="总任务数")
    completed_tasks: int = Field(default=0, description="已完成任务数")
    in_progress_tasks: int = Field(default=0, description="进行中任务数")
    pending_tasks: int = Field(default=0, description="待处理任务数")
    
    # 数据统计
    total_items: int = Field(default=0, description="总数据条数")
    annotated_items: int = Field(default=0, description="已标注数据条数")
    
    # 进度
    task_completion_rate: float = Field(default=0.0, description="任务完成率 (%)")
    data_completion_rate: float = Field(default=0.0, description="数据标注完成率 (%)")
    
    # 人员统计
    user_stats: List[UserTaskStats] = Field(default_factory=list, description="人员统计列表")


class OverviewStatisticsResponse(BaseModel):
    """平台总览统计响应"""
    # 项目统计
    total_projects: int = Field(default=0, description="总项目数")
    
    # 任务统计
    total_tasks: int = Field(default=0, description="总任务数")
    completed_tasks: int = Field(default=0, description="已完成任务数")
    in_progress_tasks: int = Field(default=0, description="进行中任务数")
    pending_tasks: int = Field(default=0, description="待处理任务数")
    
    # 用户统计
    total_users: int = Field(default=0, description="总用户数")
    admin_count: int = Field(default=0, description="管理员数")
    annotator_count: int = Field(default=0, description="标注人员数")
    
    # 标注统计
    total_annotations: int = Field(default=0, description="总标注数")
    
    # 进度
    overall_completion_rate: float = Field(default=0.0, description="整体完成率 (%)")