import cherrypy as cp

from utils.dfh import DateFrameHolder
from utils.st_utils import rerun


@cp.expose
class TableAPI:

    def __init__(self):
        self.dfh = DateFrameHolder("output.h5")
        self.sid = None
        self.changed = True

    @property
    def data(self):
        self.changed = False
        return self.dfh.df

    @data.setter
    def data(self, df):
        if self.dfh.df.equals(df):
            print("<<< skipping dump because dataframe did not change")
            return
        self.dfh.df = df
        self.dfh.dump()


    def GET(self):
        return str(self.dfh.df)

    @cp.tools.json_in()
    def PATCH(self, **kwargs):
        kwargs = kwargs or cp.request.json
        self.dfh.append(kwargs)
        self._trigger_changed()
        self.dfh.dump()
        return str(self.dfh.df)

    def DELETE(self):
        self.dfh.clear()
        self._trigger_changed()
        return "cleared"


    def _trigger_changed(self):
        self.changed = True
        rerun(self.sid)