import re

from fastapi import FastAPI, HTTPException, Depends
from pydantic import BaseModel
from sqlalchemy import create_engine, Column, Integer, String, SmallInteger, Date
from sqlalchemy.orm import declarative_base  # 更新导入路径
from sqlalchemy.orm import sessionmaker, Session
import uvicorn  # 导入 uvicorn
from starlette.staticfiles import StaticFiles

from Text2Sql.Util.VannaUtil import VannaUtil

# 数据库连接配置
DATABASE_URL = "postgresql+psycopg2://postgres:DsideaL147258369@10.10.14.71:5432/szjz_db"

# 创建数据库引擎
engine = create_engine(DATABASE_URL)

# 创建 SessionLocal 类
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

# 创建 Base 类
Base = declarative_base()

# 定义 t_bi_question 表模型
class TBIQuestion(Base):
    __tablename__ = "t_bi_question"

    id = Column(Integer, primary_key=True, index=True)
    question = Column(String(255), nullable=False)
    state_id = Column(SmallInteger, nullable=False, default=0)
    sql = Column(String(2048))
    bar_chart_x_columns = Column(String(255))
    bar_chart_y_columns = Column(String(255))
    pie_chart_category_columns = Column(String(255))
    pie_chart_value_column = Column(String(255))
    session_id = Column(String(255), nullable=False)
    excel_file_name = Column(String(255))
    bar_chart_file_name = Column(String(255))
    pie_chart_file_name = Column(String(255))
    report_file_name = Column(String(255))
    create_time = Column(Date, nullable=False, default="CURRENT_TIMESTAMP")
    is_system = Column(SmallInteger, nullable=False, default=0)
    is_collect = Column(SmallInteger, nullable=False, default=0)

# 创建 Pydantic 模型
class TBIQuestionCreate(BaseModel):
    question: str
    state_id: int = 0
    sql: str = None
    bar_chart_x_columns: str = None
    bar_chart_y_columns: str = None
    pie_chart_category_columns: str = None
    pie_chart_value_column: str = None
    session_id: str
    excel_file_name: str = None
    bar_chart_file_name: str = None
    pie_chart_file_name: str = None
    report_file_name: str = None
    is_system: int = 0
    is_collect: int = 0

class TBIQuestionUpdate(BaseModel):
    question: str = None
    state_id: int = None
    sql: str = None
    bar_chart_x_columns: str = None
    bar_chart_y_columns: str = None
    pie_chart_category_columns: str = None
    pie_chart_value_column: str = None
    session_id: str = None
    excel_file_name: str = None
    bar_chart_file_name: str = None
    pie_chart_file_name: str = None
    report_file_name: str = None
    is_system: int = None
    is_collect: int = None

# 初始化 FastAPI
app = FastAPI()

@app.get("/")
def read_root():
    return {"message": "Hello, World!"}

# 获取数据库会话
def get_db():
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()

# 创建记录
@app.post("/questions/", response_model=TBIQuestionCreate)
def create_question(question: TBIQuestionCreate, db: Session = Depends(get_db)):
    db_question = TBIQuestion(**question.dict())
    db.add(db_question)
    db.commit()
    db.refresh(db_question)
    return db_question

# 读取记录
@app.get("/questions/{question_id}", response_model=TBIQuestionCreate)
def read_question(question_id: int, db: Session = Depends(get_db)):
    db_question = db.query(TBIQuestion).filter(TBIQuestion.id == question_id).first()
    if db_question is None:
        raise HTTPException(status_code=404, detail="Question not found")
    return db_question

# 更新记录
@app.put("/questions/{question_id}", response_model=TBIQuestionCreate)
def update_question(question_id: int, question: TBIQuestionUpdate, db: Session = Depends(get_db)):
    db_question = db.query(TBIQuestion).filter(TBIQuestion.id == question_id).first()
    if db_question is None:
        raise HTTPException(status_code=404, detail="Question not found")
    for key, value in question.dict().items():
        if value is not None:
            setattr(db_question, key, value)
    db.commit()
    db.refresh(db_question)
    return db_question

# 删除记录
@app.delete("/questions/{question_id}")
def delete_question(question_id: int, db: Session = Depends(get_db)):
    db_question = db.query(TBIQuestion).filter(TBIQuestion.id == question_id).first()
    if db_question is None:
        raise HTTPException(status_code=404, detail="Question not found")
    db.delete(db_question)
    db.commit()
    return {"message": "Question deleted successfully"}

@app.post("/questions/generate_sql")
def generate_sql(question: str):
    # 指定学段
    question = '''
                    查询:
                    1、发布时间是2024年度
                    2、每个学段，每个科目，上传课程数量，按由多到少排序
                    3、字段名: 学段,科目,排名,课程数量
                    '''
    common_prompt = '''
        返回的信息要求：
        1、行政区划为NULL 或者是空字符的不参加统计
        2、目标数据库是Postgresql 16
        '''
    question = question + common_prompt
    # 开始查询
    print("开始查询...")
    # 获取完整 SQL
    sql = vn.generate_sql(question)
    print("生成的查询 SQL:\n", sql)

# 添加 main 函数
def main():
    # 开始训练
    print("开始训练...")
    # 打开AreaSchoolLesson.sql文件内容
    with open("Sql/AreaSchoolLessonDDL.sql", "r", encoding="utf-8") as file:
        ddl = file.read()
    # 训练数据
    vn.train(
        ddl=ddl
    )
    # 添加有关业务术语或定义的文档
    # vn.train(documentation="Sql/AreaSchoolLesson.md")

    # 使用 SQL 进行训练
    with open('Sql/AreaSchoolLessonGenerate.sql', 'r', encoding='utf-8') as file:
        sql_content = file.read()
    # 使用正则表达式提取注释和 SQL 语句
    sql_pattern = r'/\*(.*?)\*/(.*?);'
    sql_snippets = re.findall(sql_pattern, sql_content, re.DOTALL)

    # 打印提取的注释和 SQL 语句
    for i, (comment, sql) in enumerate(sql_snippets, 1):
        vn.train(sql=comment.strip() + '\n' + sql.strip() + '\n')


    uvicorn.run("app:app", host="0.0.0.0", port=8000, reload=True)



# 确保直接运行脚本时启动 FastAPI 应用
if __name__ == "__main__":
    vn = VannaUtil()
    main()