#!/usr/bin/env python3
#
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"""Implements the 'plot' frame"""

import sys
import tkinter as tk
from pathlib import Path
from queue import Queue
from threading import Thread
from tkinter import ttk
from typing import TextIO

from ...helpers.misc import (
    PROJECT_BUILD_ROOT,
    PROJECT_ROOT,
    ROOT_IS_PROJECT,
)
from ...helpers.spr import run_process
from .frame_data_config import DataConfigFrame
from .frame_plot_config import PlotConfigFrame
from .frame_run_plot import RunPlotFrame


# pylint: disable-next=too-many-instance-attributes,too-many-ancestors
class PlotFrame(ttk.Frame):
    """Plot Frame"""

    def __init__(self, parent: ttk.Notebook, text_widget: tk.Text) -> None:
        super().__init__(parent)
        self.parent: ttk.Notebook = parent
        self.queue: Queue = Queue()
        self.plot_process: Thread
        self.file_stream: TextIO
        self.text = text_widget
        self.text_index: int = 0
        self.file_path = PROJECT_BUILD_ROOT / "gui" / "output_gui_plot.txt"
        (PROJECT_BUILD_ROOT / "gui").mkdir(parents=True, exist_ok=True)
        self.file_path.touch()

        # Set Styles for Headings and for Notebook
        font_heading = ("TkDefaultFont", 10, "bold")
        ttk.Style().configure("heading.TButton", font=font_heading)

        # Configure a 'Notebook'
        plot_notebook = ttk.Notebook(self)
        plot_notebook.pack(fill=tk.BOTH, expand=True)

        self.tab_plot = RunPlotFrame(plot_notebook, self)
        self.tab_plot.pack(fill=tk.X, expand=True)
        plot_notebook.add(self.tab_plot, text="Run Plot")

        tab_data_config = DataConfigFrame(plot_notebook, self)
        tab_data_config.pack(fill=tk.X, expand=True)
        plot_notebook.add(tab_data_config, text="Data Config")

        tab_plot_config = PlotConfigFrame(plot_notebook, self)
        tab_plot_config.pack(fill=tk.X, expand=True)
        plot_notebook.add(tab_plot_config, text="Plot Config")

        self.plot_button = ttk.Button(
            self, text="Plot", command=self.plot_command_cb, style="heading.TButton"
        )
        self.plot_button.pack(pady=5)

    def plot_command_cb(self) -> None:
        """Start the plot-process"""
        self.text_index = 0
        self.text.config(state="normal")
        self.text.delete("1.0", tk.END)
        self.text.config(state="disabled")
        data_config = self.tab_plot.data_config_entry.get().strip()
        plot_config = self.tab_plot.plot_config_entry.get().strip()
        output_dir = Path(self.tab_plot.output_entry.get().strip())
        data_source = self.tab_plot.data_source_entry.get().strip()
        data_type = self.tab_plot.data_type_entry.get().strip()
        if (
            ((data_type != "PARQUET") and (not Path(data_config).is_file()))
            or (not Path(plot_config).is_file())
            or (not Path(data_source).is_file())
        ):
            self.write_text(
                "Configuration files and Data Source have to be given as valid file-paths\n"
            )
            return
        if (output_dir == Path()) or (not output_dir.is_dir()):
            output_dir = PROJECT_BUILD_ROOT / "plot"
            output_dir.mkdir(parents=True, exist_ok=True)
            self.tab_plot.output_entry.delete(0, tk.END)
            self.tab_plot.output_entry.insert(tk.END, str(output_dir))
            self.write_text(
                f"Output directory has been set to '{PROJECT_BUILD_ROOT / 'plot'}'\n"
            )
            return
        self.plot_button.state(["disabled"])

        if ROOT_IS_PROJECT:
            plot_command = [sys.executable, PROJECT_ROOT / "fox.py", "plot"]
        else:
            plot_command = [sys.executable, "-m", "fox_cli", "plot"]
        cmd = [
            *plot_command,
            "--plot-config",
            plot_config,
            "--output",
            output_dir,
            "--data-type",
            data_type,
        ]
        if data_type != "PARQUET":
            cmd = cmd + ["--data-config", data_config]
        cmd.append(data_source)
        self.write_text("Plotting the given graphs\n")
        # pylint: disable-next=consider-using-with
        self.file_stream = open(self.file_path, mode="a", encoding="utf-8")  # noqa: SIM115
        self.plot_process = Thread(
            target=lambda cmd, stdout, stderr: self.queue.put(
                run_process(cmd=cmd, stdout=stdout, stderr=stderr)
            ),
            kwargs={"cmd": cmd, "stdout": self.file_stream, "stderr": self.file_stream},
            daemon=True,
        )
        self.plot_process.start()
        self.check_thread()

    def check_thread(self) -> None:
        """If the provided thread is not alive the button is activated"""
        if self.plot_process.is_alive():
            self.after(50, self.check_thread)
        else:
            self.plot_button.state(["!disabled"])
            if not self.queue.empty() and (return_value := self.queue.get()):
                if return_value.returncode == 0:
                    self.file_stream.write("Finished Plotting\n")
                else:
                    self.file_stream.write("Plotting was not successful\n")
            self.file_stream.close()
        self.write_text()

    def write_text(self, file_input: None | str = None) -> None:
        """Writes the file content in the text box"""
        if file_input is not None:
            with open(self.file_path, mode="a", encoding="utf-8", errors="ignore") as f:
                f.write(file_input)
        if self != self.parent.nametowidget(self.parent.select()):
            return
        self.text.config(state="normal")
        with open(self.file_path, encoding="utf-8", errors="ignore") as f:
            file_content = f.read()
            text_length = len(file_content)
            self.text.insert(tk.END, file_content[self.text_index :])
            if text_length > 0:
                self.text_index = text_length
            self.text.see(tk.END)
        self.text.config(state="disabled")