from fastapi import APIRouter, Request, Depends, HTTPException, Query,Response
from sqlalchemy.exc import IntegrityError

from fastapi.responses import JSONResponse
from database import get_db
from sqlalchemy.orm import Session
from models import *
import json
import random
from sqlalchemy import create_engine, select, or_
from typing import Optional
import uuid
router = APIRouter()








@router.post('/create')
async def create_knowledge(request: Request, db: Session = Depends(get_db)):
    body = await request.json()
    required_fields = ['reportName', 'subject', 'eventType', 'publishingUnit', 'publishDate', 'summary', 'fileNames']
    if not all(field in body for field in required_fields):
        missing_fields = ", ".join([field for field in required_fields if field not in body])
        return Response(content=f"Missing required fields: {missing_fields}", status_code=400)

    reportId = f'ZJBG{random.randint(1000000000, 9999999999)}'
    base_code = 'base' + f'{random.randint(1000000000, 9999999999)}'
    uuid1 = uuid.uuid1()
    knowledge = KnowledgeBase(
        reportId=reportId,
        **{
            field: body[field]
            for field in required_fields
            if field != 'fileNames'
        },
        base_code=base_code,
        del_flag = 0,
        updateTime=body['publishDate'],
        notificationType="总结报告"  # 硬编码的值，如果有其他情况需要处理，请修改
    )

    db.add(knowledge)


    knowledge_files = [
        KnowledgeFile(
            file_identifier=f'file{random.randint(1000000000, 9999999999)}',
            file_path=f'/data/upload/mergefile/{fileName["url"]}',
            storage_file_name=fileName["url"],
            file_name=fileName["name"],  # 使用 fileName["name"] 作为文件名
            is_deleted=0,
            updateTime=body['publishDate'],
            createTime=body['publishDate'],
            knowledge_base_code=base_code
        )
        for fileName in body['fileNames']  # body['fileNames'] 现在是一个包含对象的数组，每个对象都有 'name' 和 'url' 属性
    ]
    db.add_all(knowledge_files)

    try:
        db.commit()
        knowledge_entry = db.query(KnowledgeBase).filter(KnowledgeBase.reportId == reportId).first()
        files_entry = db.query(KnowledgeFile).filter(KnowledgeFile.knowledge_base_code == base_code).all()
        return {
            "code": 200,
            "msg": "总结报告创建成功",
            "status": "success",
            "data": [{
                "reportId":knowledge_entry.reportId,
                "reportName":knowledge_entry.reportName,
                "eventType":knowledge_entry.eventType,
                "publishingUnit":knowledge_entry.publishingUnit,
                "subject":knowledge_entry.subject,
                "publishDate":knowledge_entry.publishDate,
                "summary":knowledge_entry.summary,
                "files": [
                    {
                        "fileIdentifier": file.file_identifier,
                        "fileName": file.file_name,
                        "url": file.storage_file_name,
                        "status":"success"
                    }
                    for file in files_entry
                ]
            }]
        }
    except IntegrityError as e:
        db.rollback()
        return Response(content=f"Database error: {str(e)}", status_code=409)
    except Exception as e:
        db.rollback()
        return Response(content=f"Internal server error: {str(e)}", status_code=500)





@router.get('/select')
async def select_knowledge(
    db: Session = Depends(get_db),
    sortBy: str = Query(..., description="排序字段"),
    sortOrder: str = Query(..., description="排序顺序"),
    pageNum: int = Query(1, gt=0, description="页码"),
    pageSize: int = Query(10, gt=0, le=100, description="每页大小"),
    eventType: str = Query(None, description="事件类型"),
    publishDateRange: str = Query(None, description="发布日期范围"),
    query: str = Query(None, description="查询关键字")
):
    data_query = db.query(KnowledgeBase)
    data_query = data_query.filter(KnowledgeBase.del_flag != '2')

    if eventType:
        data_query = data_query.filter(KnowledgeBase.eventType == eventType)

    if publishDateRange:
        start_date, end_date = publishDateRange.split('-')
        data_query = data_query.filter(KnowledgeBase.publishDate.between(start_date, end_date))

    if query:
        search_fields = [getattr(KnowledgeBase, field) for field in ('reportName', 'publishingUnit', 'reportId') if hasattr(KnowledgeBase, field)]
        search_conditions = [field.like(f'%{query}%') for field in search_fields]
        data_query = data_query.filter(or_(*search_conditions))

    if hasattr(KnowledgeBase, sortBy):
        sort_attr = getattr(KnowledgeBase, sortBy)
        data_query = data_query.order_by(sort_attr.asc() if sortOrder == 'asc' else sort_attr.desc())
    total_count = data_query.count()
    offset = (pageNum - 1) * pageSize
    data_query = data_query.offset(offset).limit(pageSize)

    fields = ['reportId', 'reportName', 'eventType', 'publishDate', 'publishingUnit', 'summary', 'subject', 'notificationType', 'base_code']
    entities = [getattr(KnowledgeBase, field) for field in fields if hasattr(KnowledgeBase, field)]
    data = data_query.with_entities(*entities).offset(offset).limit(pageSize).all()

    result_items = []
    for item in data:
        item_dict = {field: getattr(item, field) for field in fields}
        print(item_dict)
        base_code = item_dict['base_code']
        kf_entries = db.query(KnowledgeFile).filter(KnowledgeFile.knowledge_base_code == base_code).filter(KnowledgeFile.is_deleted != '2').all()
        item_dict['files'] = [
            {
                "fileIdentifier": file.file_identifier,
                "fileName": file.file_name,
                "url": file.storage_file_name,
                "status":"success"
            }
            for file in kf_entries
        ]
            
        result_items.append(item_dict)



    result = {
        "code": 200,
        'msg': '查询成功',
        'pages': (total_count + pageSize - 1) // pageSize,
        'total': total_count,
        "currentPage": pageNum,
        "pageSize": pageSize,
        'data': result_items
    }

    return result








@router.get('/detail')
async def get_knowledge_detail(db: Session = Depends(get_db), reportID: Optional[str] = Query(None, description="报告ID")):
    if not reportID:
        raise HTTPException(status_code=400, detail="Missing required parameter 'reportID'")

    # kb_entry = db.query(KnowledgeBase)
    # kb_entry = kb_entry.filter(KnowledgeBase.del_flag != '2')
    # 先过滤出 del_flag 不等于 '2' 的记录，然后再根据 report_id 筛选
    kb_entry = (db.query(KnowledgeBase)
                .filter(KnowledgeBase.del_flag != '2')  # 确保这里过滤掉 del_flag 等于 '2' 的记录
                .filter(KnowledgeBase.reportId == reportID))  # 确保 reportID 是在过滤后的查询中使用的

    kb_entry = kb_entry.first()
    if not kb_entry:
        raise HTTPException(status_code=404, detail="报告不存在")

    kf_entries = db.query(KnowledgeFile).filter(KnowledgeFile.knowledge_base_code == kb_entry.base_code)\
        .filter(KnowledgeFile.is_deleted != '2').all()
    files = [
        {"content": kf.file_name, "url": kf.storage_file_name,"file_identifier":kf.file_identifier}
        for kf in kf_entries
    ]
    
    '''
    files = [
        {
            "fileIdentifier": file.file_identifier,
            "fileName": file.file_name,
            "url": file.storage_file_name,
            "status":"success"
        }
        for file in kf_entries
    ]
    '''

    result = {
        "code": 200,
        "msg": "查询成功",
        "data": [{
            "report_id": kb_entry.reportId,
            "reportName": kb_entry.reportName,
            "subject": kb_entry.subject,
            "eventType": kb_entry.eventType,
            "publishDate": kb_entry.publishDate,
            "publishingUnit": kb_entry.publishingUnit,
            "summary": kb_entry.summary,
            "notificationType": kb_entry.notificationType,
            "file": files
        }]
    }

    return result


@router.post  ('/delete')
async def delete_knowledge(request: Request, db: Session = Depends(get_db)):
    # 从请求的 JSON 数据中获取 reportID
    body = await request.json()
    report_id_to_use = body.get('reportID')
    if not report_id_to_use:
        return Response(content="Missing required parameter 'reportID'", status_code=400)

    kb_entry = (db.query(KnowledgeBase)
                .filter(KnowledgeBase.del_flag != '2')  # 确保这里过滤掉 del_flag 等于 '2' 的记录
                .filter(KnowledgeBase.reportId == report_id_to_use))  # 确保 reportID 是在过滤后的查询中使用的

    kb_entry = kb_entry.first()
    if not kb_entry:
        raise HTTPException(status_code=404, detail="报告不存在")

    # 将找到的记录的 is_deleted 改为 2
    kb_entry.is_deleted = 2

    kf_entries = db.query(KnowledgeFile).filter(KnowledgeFile.knowledge_base_code == kb_entry.base_code).all()
    for kf_entry in kf_entries:
        kf_entry.is_deleted = 2

    if hasattr(kb_entry, 'del_flag'):
        kb_entry.del_flag = 2

    try:
        db.commit()
        return {
            "code": 200,
            "msg": "操作成功",
            "data": {
                "report_id": kb_entry.reportId
            }
        }
    except Exception as e:
        db.rollback()
        return Response(content="An error occurred while deleting the record: " + str(e), status_code=500)






@router.delete('/delete/list')
async def delete_knowledge_list(request: Request, db: Session = Depends(get_db)):
    # 从请求的 JSON 数据中获取 reportID
    body = await request.json()
    report_id_to_use = body.get('reportID')
    if not report_id_to_use:
        return Response(content="Missing required parameter 'reportID'", status_code=400)


    # kb_entry = (db.query(KnowledgeBase)
    #             .filter(KnowledgeBase.del_flag != '2')  # 确保这里过滤掉 del_flag 等于 '2' 的记录
    #             .filter(KnowledgeBase.reportId.in_report_(id_to_use)))  # 确保 reportID 是在过滤后的查询中使用的
    #
    # kb_entrys = kb_entry.all()
    query = db.query(KnowledgeBase)
    query = query.filter(KnowledgeBase.del_flag != '2')
    query = query.filter(KnowledgeBase.reportId.in_(report_id_to_use))
    kb_entrys = query.all()

    if not kb_entrys:
        raise HTTPException(status_code=404, detail="报告不存在")
    for kb_entry in kb_entrys:
        # 将找到的记录的 is_deleted 改为 2
        kb_entry.is_deleted = 2

        kf_entries = db.query(KnowledgeFile).filter(KnowledgeFile.knowledge_base_code == kb_entry.base_code).all()
        for kf_entry in kf_entries:
            kf_entry.is_deleted = 2

        if hasattr(kb_entry, 'del_flag'):
            kb_entry.del_flag = 2

    try:
        db.commit()
        return {
            "code": 200,
            "msg": "操作成功",
            "data": None
        }
    except Exception as e:
        db.rollback()
        return Response(content="An error occurred while deleting the record: " + str(e), status_code=500)












def delete_file_fun(knowledge_base_code,db: Session):
    file_query = db.query(KnowledgeFile)
    file_query = file_query.filter(KnowledgeFile.is_deleted != '2')
    file_query = file_query.filter(KnowledgeFile.knowledge_base_code == knowledge_base_code)
    # file_query = file_query.filter(KnowledgeFile.foreign_key == foreign_key)
    files = file_query.all()
    for file in files:
        file.is_deleted='2'
    db.commit()




@router.post('/update')
async def update_knowledge(request: Request, db: Session = Depends(get_db)):
    body = await request.json()
    report_id_to_use = body.get('reportId')
    if not report_id_to_use:
        return Response(content="Missing required parameter 'reportId'", status_code=400)

    kb_entry = (db.query(KnowledgeBase)
                .filter(KnowledgeBase.del_flag != '2')  # 确保这里过滤掉 del_flag 等于 '2' 的记录
                .filter(KnowledgeBase.reportId == report_id_to_use))  # 确保 reportID 是在过滤后的查询中使用的


    kb_entry = kb_entry.first()
    if not kb_entry:
        raise HTTPException(status_code=404, detail="报告不存在")


    kb_entry.reportName = body.get('reportName', kb_entry.reportName)
    kb_entry.subject = body.get('subject', kb_entry.subject)
    kb_entry.eventType = body.get('eventType', kb_entry.eventType)
    kb_entry.publishingUnit = body.get('publishingUnit', kb_entry.publishingUnit)
    kb_entry.publishDate = body.get('publishDate', kb_entry.publishDate)
    kb_entry.summary = body.get('summary', kb_entry.summary)
    kb_entry.updateTime = datetime.strptime(body.get('publishDate', kb_entry.updateTime), '%Y-%m-%d %H:%M:%S')

    base_code = kb_entry.base_code


    if len(body.get('fileNames')) > 0:
        if kb_entry.base_code:
            delete_file_fun(kb_entry.base_code,db=db)

        knowledge_files = [
            KnowledgeFile(
                file_identifier=f'file{random.randint(1000000000, 9999999999)}',
                file_path=f'/data/upload/mergefile/{fileName["url"]}',
                storage_file_name=fileName["url"],
                file_name=fileName["name"],  # 使用 fileName["name"] 作为文件名
                is_deleted=0,
                updateTime=body['publishDate'],
                knowledge_base_code=base_code
            )
            for fileName in body['fileNames']  # body['fileNames'] 现在是一个包含对象的数组，每个对象都有 'name' 和 'url' 属性
        ]
        db.add_all(knowledge_files)

    try:
        db.commit()
        return {
            "code": 200,
            "msg": "修改成功",
            "data": {
                "report_id": report_id_to_use,
                "updateTime": kb_entry.updateTime.isoformat()
            }
        }
    except IntegrityError as e:
        db.rollback()
        return Response(content=f"Database error: {str(e)}", status_code=409)
    except Exception as e:
        db.rollback()
        return Response(content=str(e), status_code=500)




@router.put('/update/list')
async def update_knowledge_list(request: Request, db: Session = Depends(get_db)):
    body = await request.json()
    update_items = body.get('updateItems')
    if not update_items or not isinstance(update_items, list):
        return Response(content="Missing required parameter 'updateItems'", status_code=400)

    try:
        for item in update_items:
            report_id_to_use = item.get('reportId')
            if not report_id_to_use:
                continue  # 如果没有提供 reportId，则跳过当前项

            # 根据 reportId 查找 KnowledgeBase 记录
            kb_entry = db.query(KnowledgeBase).filter(
                KnowledgeBase.reportId == report_id_to_use
            ).first()
            if not kb_entry:
                continue  # 如果没有找到记录，则跳过当前项

            # 更新 KnowledgeBase 记录
            for field, value in item.items():
                if field != 'reportId' and hasattr(kb_entry, field):
                    setattr(kb_entry, field, value)

            kb_entry.updateTime = datetime.fromisoformat(item.get('publishDate'))

        # 提交事务
        db.commit()
        return {
            "code": 200,
            "msg": "批量更新成功",
            "data": {
                "updated_count": len(update_items)
            }
        }
    except IntegrityError as e:
        db.rollback()
        return Response(content=f"Database error: {str(e)}", status_code=409)
    except Exception as e:
        db.rollback()
        return Response(content=str(e), status_code=500)