"""
管理员仪表盘相关 API
"""
from fastapi import APIRouter, Depends, HTTPException
from sqlalchemy.ext.asyncio import AsyncSession
from sqlalchemy import select, func
import os
import glob

from app.core.database import get_db
from app.core.deps import get_current_user
from app.core.config import settings
from app.models.user import User
from app.models.project import Project, ProjectMember
from app.schemas.response import success_response

router = APIRouter()


@router.get("/stats", response_model=dict)
async def get_dashboard_stats(
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db)
):
    """获取仪表盘统计数据（仅管理员）"""

    # 检查是否为超级管理员
    if current_user.is_superuser != 1:
        raise HTTPException(status_code=403, detail="仅管理员可访问")

    # 统计用户数
    user_count_result = await db.execute(select(func.count(User.id)))
    user_count = user_count_result.scalar()

    # 统计项目数
    project_count_result = await db.execute(select(func.count(Project.id)))
    project_count = project_count_result.scalar()

    # 统计文档数（所有项目中的 .md 文件）
    document_count = 0
    if os.path.exists(settings.PROJECTS_PATH):
        for project_dir in os.listdir(settings.PROJECTS_PATH):
            project_path = os.path.join(settings.PROJECTS_PATH, project_dir)
            if os.path.isdir(project_path):
                md_files = glob.glob(os.path.join(project_path, "**/*.md"), recursive=True)
                document_count += len(md_files)

    # 获取最近创建的用户
    recent_users_result = await db.execute(
        select(User)
        .order_by(User.created_at.desc())
        .limit(5)
    )
    recent_users = recent_users_result.scalars().all()
    recent_users_data = [
        {
            "id": user.id,
            "username": user.username,
            "email": user.email,
            "created_at": user.created_at.isoformat() if user.created_at else None,
        }
        for user in recent_users
    ]

    # 获取最近创建的项目（包含所有者信息）
    recent_projects_result = await db.execute(
        select(Project, User)
        .join(User, Project.owner_id == User.id)
        .order_by(Project.created_at.desc())
        .limit(5)
    )
    recent_projects_rows = recent_projects_result.all()
    recent_projects_data = [
        {
            "id": project.id,
            "name": project.name,
            "description": project.description,
            "owner_name": owner.username,
            "created_at": project.created_at.isoformat() if project.created_at else None,
        }
        for project, owner in recent_projects_rows
    ]

    return success_response(
        data={
            "stats": {
                "user_count": user_count,
                "project_count": project_count,
                "document_count": document_count,
            },
            "recent_users": recent_users_data,
            "recent_projects": recent_projects_data,
        }
    )


@router.get("/personal-stats", response_model=dict)
async def get_personal_stats(
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db)
):
    """获取个人桌面统计数据"""

    # 统计个人项目数
    personal_projects_count_result = await db.execute(
        select(func.count(Project.id)).where(Project.owner_id == current_user.id)
    )
    personal_projects_count = personal_projects_count_result.scalar()

    # 统计参加项目数（协作项目）
    shared_projects_count_result = await db.execute(
        select(func.count(Project.id))
        .join(ProjectMember, Project.id == ProjectMember.project_id)
        .where(ProjectMember.user_id == current_user.id)
        .where(Project.owner_id != current_user.id)
    )
    shared_projects_count = shared_projects_count_result.scalar()

    # 统计个人文档数（个人项目中的 .md 文件）
    document_count = 0
    personal_projects_result = await db.execute(
        select(Project).where(Project.owner_id == current_user.id)
    )
    personal_projects = personal_projects_result.scalars().all()

    for project in personal_projects:
        project_path = os.path.join(settings.PROJECTS_PATH, project.storage_key)
        if os.path.exists(project_path) and os.path.isdir(project_path):
            md_files = glob.glob(os.path.join(project_path, "**/*.md"), recursive=True)
            document_count += len(md_files)

    # 获取最近的个人项目
    recent_personal_projects_result = await db.execute(
        select(Project)
        .where(Project.owner_id == current_user.id)
        .order_by(Project.created_at.desc())
        .limit(5)
    )
    recent_personal_projects = recent_personal_projects_result.scalars().all()
    recent_personal_projects_data = [
        {
            "id": project.id,
            "name": project.name,
            "description": project.description,
            "created_at": project.created_at.isoformat() if project.created_at else None,
        }
        for project in recent_personal_projects
    ]

    # 获取最近的分享项目（从 project_members 表）
    recent_shared_projects_result = await db.execute(
        select(Project, ProjectMember)
        .join(ProjectMember, Project.id == ProjectMember.project_id)
        .where(ProjectMember.user_id == current_user.id)
        .where(Project.owner_id != current_user.id)
        .order_by(ProjectMember.joined_at.desc())
        .limit(5)
    )
    recent_shared_projects_rows = recent_shared_projects_result.all()
    recent_shared_projects_data = [
        {
            "id": project.id,
            "name": project.name,
            "description": project.description,
            "role": member.role,
            "joined_at": member.joined_at.isoformat() if member.joined_at else None,
        }
        for project, member in recent_shared_projects_rows
    ]

    return success_response(
        data={
            "user_info": {
                "id": current_user.id,
                "username": current_user.username,
                "email": current_user.email,
                "created_at": current_user.created_at.isoformat() if current_user.created_at else None,
            },
            "stats": {
                "personal_projects_count": personal_projects_count,
                "shared_projects_count": shared_projects_count,
                "document_count": document_count,
            },
            "recent_personal_projects": recent_personal_projects_data,
            "recent_shared_projects": recent_shared_projects_data,
        }
    )