"""
统计分析API路由
"""
from typing import Optional
from fastapi import APIRouter, Depends, Query
from sqlalchemy.ext.asyncio import AsyncSession

from app.core.deps import get_db, get_current_user
from app.models.user import User
from app.schemas.base import ResponseModel
from app.services.statistics_service import StatisticsService
from app.core.logger import get_logger

logger = get_logger(__name__)
router = APIRouter(prefix="/statistics", tags=["statistics"])


@router.get("/key-metrics", response_model=ResponseModel)
async def get_key_metrics(
    course_id: Optional[int] = Query(None, description="课程ID，不传则统计全部课程"),
    period: str = Query("month", description="时间范围: week/month/quarter/halfYear/year"),
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db)
):
    """
    获取关键指标
    
    返回：
    - learningEfficiency: 学习效率
    - knowledgeCoverage: 知识覆盖率
    - avgTimePerQuestion: 平均用时
    - progressSpeed: 进步速度
    """
    try:
        metrics = await StatisticsService.get_key_metrics(
            db=db,
            user_id=current_user.id,
            course_id=course_id,
            period=period
        )
        
        return ResponseModel(
            code=200,
            message="获取关键指标成功",
            data=metrics
        )
    except Exception as e:
        logger.error(f"获取关键指标失败: {e}", exc_info=True)
        return ResponseModel(
            code=500,
            message=f"获取关键指标失败: {str(e)}"
        )


@router.get("/score-distribution", response_model=ResponseModel)
async def get_score_distribution(
    course_id: Optional[int] = Query(None, description="课程ID，不传则统计全部课程"),
    period: str = Query("month", description="时间范围: week/month/quarter/halfYear/year"),
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db)
):
    """
    获取成绩分布统计
    
    返回各分数段的考试数量：
    - excellent: 优秀(90-100)
    - good: 良好(80-89)
    - medium: 中等(70-79)
    - pass: 及格(60-69)
    - fail: 不及格(<60)
    """
    try:
        distribution = await StatisticsService.get_score_distribution(
            db=db,
            user_id=current_user.id,
            course_id=course_id,
            period=period
        )
        
        return ResponseModel(
            code=200,
            message="获取成绩分布成功",
            data=distribution
        )
    except Exception as e:
        logger.error(f"获取成绩分布失败: {e}", exc_info=True)
        return ResponseModel(
            code=500,
            message=f"获取成绩分布失败: {str(e)}"
        )


@router.get("/difficulty-analysis", response_model=ResponseModel)
async def get_difficulty_analysis(
    course_id: Optional[int] = Query(None, description="课程ID，不传则统计全部课程"),
    period: str = Query("month", description="时间范围: week/month/quarter/halfYear/year"),
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db)
):
    """
    获取题目难度分析
    
    返回各难度题目的正确率：
    - 简单题
    - 中等题
    - 困难题
    - 综合题
    - 应用题
    """
    try:
        analysis = await StatisticsService.get_difficulty_analysis(
            db=db,
            user_id=current_user.id,
            course_id=course_id,
            period=period
        )
        
        return ResponseModel(
            code=200,
            message="获取难度分析成功",
            data=analysis
        )
    except Exception as e:
        logger.error(f"获取难度分析失败: {e}", exc_info=True)
        return ResponseModel(
            code=500,
            message=f"获取难度分析失败: {str(e)}"
        )


@router.get("/knowledge-mastery", response_model=ResponseModel)
async def get_knowledge_mastery(
    course_id: Optional[int] = Query(None, description="课程ID，不传则统计全部课程"),
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db)
):
    """
    获取知识点掌握度
    
    返回知识点列表及其掌握度：
    - name: 知识点名称
    - mastery: 掌握度（0-100）
    """
    try:
        mastery = await StatisticsService.get_knowledge_mastery(
            db=db,
            user_id=current_user.id,
            course_id=course_id
        )
        
        return ResponseModel(
            code=200,
            message="获取知识点掌握度成功",
            data=mastery
        )
    except Exception as e:
        logger.error(f"获取知识点掌握度失败: {e}", exc_info=True)
        return ResponseModel(
            code=500,
            message=f"获取知识点掌握度失败: {str(e)}"
        )


@router.get("/study-time", response_model=ResponseModel)
async def get_study_time_stats(
    course_id: Optional[int] = Query(None, description="课程ID，不传则统计全部课程"),
    period: str = Query("month", description="时间范围: week/month/quarter/halfYear/year"),
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db)
):
    """
    获取学习时长统计
    
    返回学习时长和练习时长的日期分布：
    - labels: 日期标签列表
    - studyTime: 学习时长列表（小时）
    - practiceTime: 练习时长列表（小时）
    """
    try:
        time_stats = await StatisticsService.get_study_time_stats(
            db=db,
            user_id=current_user.id,
            course_id=course_id,
            period=period
        )
        
        return ResponseModel(
            code=200,
            message="获取学习时长统计成功",
            data=time_stats
        )
    except Exception as e:
        logger.error(f"获取学习时长统计失败: {e}", exc_info=True)
        return ResponseModel(
            code=500,
            message=f"获取学习时长统计失败: {str(e)}"
        )


@router.get("/detail", response_model=ResponseModel)
async def get_detail_data(
    course_id: Optional[int] = Query(None, description="课程ID，不传则统计全部课程"),
    period: str = Query("month", description="时间范围: week/month/quarter/halfYear/year"),
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db)
):
    """
    获取详细统计数据（按日期）
    
    返回每日详细统计数据：
    - date: 日期
    - examCount: 考试次数
    - avgScore: 平均分
    - studyTime: 学习时长（小时）
    - questionCount: 练习题数
    - accuracy: 正确率
    - improvement: 进步指数
    """
    try:
        detail = await StatisticsService.get_detail_data(
            db=db,
            user_id=current_user.id,
            course_id=course_id,
            period=period
        )
        
        return ResponseModel(
            code=200,
            message="获取详细数据成功",
            data=detail
        )
    except Exception as e:
        logger.error(f"获取详细数据失败: {e}", exc_info=True)
        return ResponseModel(
            code=500,
            message=f"获取详细数据失败: {str(e)}"
        )