# -*- coding: utf-8 -*-
# @Time    : 2024/11/19 下午8:05
# @FileName: manage_project.py
# @Software: PyCharm
from fastapi import HTTPException, Response, Depends, APIRouter
from typing import Optional, Annotated
from datetime import datetime, timedelta
from jose import JWTError, jwt
from sqlalchemy import delete

from sqlmodel import select

from models import Tenant, User, Project, ProjectUserLink
from dependencies import *

from typing import List

router = APIRouter()
TenantRole = 1


# 列举所有项目
@router.get("/api/s1/project")
async def get_project(response: Response, session: SessionDep):
    projects = session.query(Project).filter().all()
    if not projects:
        raise HTTPException(status_code=404, detail="Project not found")
    return {"projects": projects}

#新增与修改项目
@router.post("/api/s1/project")
async def create_project(data: dict, session: SessionDep):
    project_id = data.get("project_id")
    name = data["name"]
    requirement = data["requirement"]
    start_time_str = data["start_time"]
    deadline_str = data["deadline"]
    estimators = data["estimators"]
    auditors = data["auditors"]

    # 验证是否缺少必要参数
    if not name or not requirement or not start_time_str or not deadline_str:
        raise HTTPException(status_code=400, detail="Need more name/requirement/start_time/deadline")

    # 验证开始时间是否早于结束时间
    start_time = datetime.strptime(start_time_str, "%Y-%m-%d")
    deadline = datetime.strptime(deadline_str, "%Y-%m-%d")
    if start_time > deadline:
        raise HTTPException(status_code=400, detail="Start time must be before deadline")

    # 验证评估审核员是否存在
    query_estimators = select(User).where(User.username.in_(estimators))
    users_estimators = session.exec(query_estimators).all()
    query_auditors = select(User).where(User.username.in_(auditors))
    users_auditors = session.exec(query_auditors).all()
    # 提取出所有查询到的
    existing_estimators = {user.username for user in users_estimators}
    existing_auditors = {user.username for user in users_auditors}

    # 验证是否所有的username都存在于数据库中
    missing_usernames = (set(auditors) | set(estimators)) - existing_estimators - existing_auditors

    if missing_usernames:
        raise HTTPException(status_code=404, detail=f"Missing usernames:{missing_usernames}")

    # 更新项目还是新增项目
    if project_id:
        # 查找现有项目
        project = session.get(Project, project_id)
        if not project:
            raise HTTPException(status_code=404, detail="Project not found")

        # 更新项目内容
        project.name = name
        project.requirement = requirement
        project.start_time = start_time
        project.deadline = deadline
    else:
        # 新增项目
        project = Project(
            name=name,
            requirement=requirement,
            start_time=start_time,
            deadline=deadline,
            owner_id=1  # 假设owner_id是1
        )
        session.add(project)

    # 处理项目和用户的关联
    # 先清除现有的关联
    # 生成删除语句并执行
    print(project_id) #测试用
    stmt = delete(ProjectUserLink).where(ProjectUserLink.project_id == project.id)
    session.execute(stmt)
    session.commit()  # 提交事务

    # 重新建立与评估员和审核员的关系
    for username in estimators:
        user = next((user for user in users_estimators if user.username == username), None)
        if user:
            project_user_link = ProjectUserLink(project_id=project.id, user_id=user.id)
            session.add(project_user_link)

    for username in auditors:
        user = next((user for user in users_auditors if user.username == username), None)
        if user:
            project_user_link = ProjectUserLink(project_id=project.id, user_id=user.id)
            session.add(project_user_link)

    # 提交事务
    session.commit()
    session.refresh(project)

    return {"message": "Added or updated successfully",
            "information": project,
            }

#删除项目
@router.delete("/api/s1/project")
async def delete_project(data : dict, session: SessionDep):
    project_id = data.get("project_id")
    # 权限检查：只有管理员才可以删除项目
    # if current_user.role != 1:
    #     raise HTTPException(status_code=403, detail="Only admin users can delete projects")

    if not project_id:
        raise HTTPException(status_code=400, detail="Project ID is required")

    # 查找项目
    project = session.exec(
        select(Project).where(Project.id == project_id)).first()
    if not project:
        raise HTTPException(status_code=404,
                            detail="Project not found or you do not have permission to delete this project")

    # 删除与项目相关的用户链接
    # 先清除现有的关联
    stmt = delete(ProjectUserLink).where(ProjectUserLink.project_id == project_id)
    session.execute(stmt)

    # 删除项目
    session.delete(project)
    session.commit()

    return {"detail": "Project deleted successfully"}