from pyerrors.input import json as pj
import os
import datalad.api as dl
import sqlite3
from .input.sfcf import get_specs
from .input.sfcf import read_param


def write_measurement(path, ensemble, measurement, uuid, code, parameter_file):
    """
    Write a measurement to the backlog.
    If the file for the measurement already exists, update the measurement.

    Parameters
    ----------
    path: str
        The path to the backlogger folder.
    ensemble: str
        The ensemble of the measurement.
    measurement: dict
        Measurements to be captured in the backlogging system.
    uuid: str
        The uuid of the project.
    """
    parameters = read_param(path, uuid, parameter_file)
    print(parameters)
    dl.unlock(path + '/backlogger.db', dataset=path)
    conn = sqlite3.connect(path + '/backlogger.db')
    c = conn.cursor()
    files = []
    for corr in measurement.keys():
        file = path + "/archive/" + ensemble + "/" + corr + '/' + uuid + '.json.gz'
        files.append(file)
        if not os.path.exists(path + "/archive/" + ensemble + "/" + corr):
            os.makedirs(path + "/archive/" + ensemble + "/" + corr)

        for subkey in measurement[corr].keys():
            meas_path = file + "::" + subkey

            if os.path.exists(file):
                dl.unlock(file, dataset=path)
                known_meas = pj.load_json_dict(file)
                for key in measurement[corr].keys():
                    known_meas[key] = measurement[corr][key]
                # this should be only set if something changed.
            else:
                known_meas = measurement[corr]

            if c.execute("SELECT * FROM backlogs WHERE path = ?", (meas_path,)).fetchone() is not None:
                c.execute("UPDATE backlogs SET name = ?, ensemble = ?, code = ?, project = ?, parameters = ?, parameter_file = ?, updated_at = datetime('now') WHERE path = ?", (meas_path, ))
            else:
                c.execute("INSERT INTO backlogs (name, ensemble, code, path, project, parameters, parameter_file, created_at, updated_at) VALUES (?, ?, ?, ?, ?, ?, ?, datetime('now'), datetime('now'))", (corr, ensemble, code, meas_path, uuid, get_specs(corr + "/" + subkey, parameters), parameter_file))
        conn.commit()
        pj.dump_dict_to_json(measurement[corr], file)
    files.append(path + '/backlogger.db')
    conn.close()
    dl.save(files, message="Add measurement to database", dataset=path)