from pathlib import Path
from typing import List
import numpy
import matplotlib.pyplot as plt  # TODO
from datetime import datetime

from langfingaz import loadData
from langfingaz import parseMeetings
from langfingaz.parseMeetings import BbbStatus, Meeting
from langfingaz.util import fileUtil


def getDefaultPlotFolder() -> Path:
    return fileUtil.getProjectBaseDir().joinpath("plot")


def plotMeetings(dataDir: Path = fileUtil.getProjectBaseDir().joinpath("data")):
    bbbStati: List[BbbStatus] = []

    for file in dataDir.iterdir():
        if file.name.endswith(".xml"):
            dataStr, t = loadData.loadData(file)
            meetings: List[Meeting] = parseMeetings.parseMeetingsData(dataStr)
            bbbStati.append(parseMeetings.BbbStatus(meetings, t))

    image: Path = doPlotMeetings(bbbStati)
    print("saved image at " + str(image))


def doPlotMeetings(bbbStati: List[BbbStatus]) -> Path:
    time = []  # x-axis: time
    participants = []  # yAxis (1)
    videos = []  # yAxis (2)
    voices = []  # yAxis (3)

    for bbbStatus in bbbStati:
        time.append(bbbStatus.pointOfTime)
        participants.append(bbbStatus.participantCount)
        videos.append(bbbStatus.videoCount)
        voices.append(bbbStatus.voiceParticipantCount)

    # Note that even in the OO-style, we use `.pyplot.figure` to create the figure.
    fig, ax = plt.subplots()  # Create a figure and an axes.
    ax.plot(time, participants, label='participants')  # Plot some data on the axes.
    ax.plot(time, videos, label='video')  # Plot more data on the axes...
    ax.plot(time, voices, label='voice')  # ... and some more.
    ax.set_xlabel('time')  # Add an x-label to the axes.
    ax.set_ylabel('numbers')  # Add a y-label to the axes.
    ax.set_title("BigBlueButton Statistics")  # Add a title to the axes.
    ax.legend()  # Add a legend.

    image: Path = getDefaultPlotFolder().joinpath(
        "{}_until_{}".format(fileUtil.asString(time[0]), fileUtil.asString(time[-1]))
    )
    fig.savefig(image)
    # plt.show()

    return image


if __name__ == '__main__':
    plotMeetings()