#!/usr/bin python3
""" The command frame for Faceswap GUI """

import logging
import tkinter as tk
from tkinter import ttk

from .tooltip import Tooltip
from .utils import ContextMenu, FileHandler, get_images, get_config, set_slider_rounding

logger = logging.getLogger(__name__)  # pylint: disable=invalid-name


class CommandNotebook(ttk.Notebook):  # pylint: disable=too-many-ancestors
    """ Frame to hold each individual tab of the command notebook """

    def __init__(self, parent):
        logger.debug("Initializing %s: (parent: %s)", self.__class__.__name__, parent)
        scaling_factor = get_config().scaling_factor
        width = int(420 * scaling_factor)
        height = int(500 * scaling_factor)
        ttk.Notebook.__init__(self, parent, width=width, height=height)
        parent.add(self)

        self.actionbtns = dict()
        self.set_running_task_trace()
        self.build_tabs()
        get_config().command_notebook = self
        logger.debug("Initialized %s", self.__class__.__name__)

    def set_running_task_trace(self):
        """ Set trigger action for the running task
            to change the action buttons text and command """
        logger.debug("Set running trace")
        tk_vars = get_config().tk_vars
        tk_vars["runningtask"].trace("w", self.change_action_button)

    def build_tabs(self):
        """ Build the tabs for the relevant command """
        logger.debug("Build Tabs")
        cli_opts = get_config().cli_opts
        for category in cli_opts.categories:
            cmdlist = cli_opts.commands[category]
            for command in cmdlist:
                title = command.title()
                commandtab = CommandTab(self, category, command)
                self.add(commandtab, text=title)
        logger.debug("Built Tabs")

    def change_action_button(self, *args):
        """ Change the action button to relevant control """
        logger.debug("Update Action Buttons: (args: %s", args)
        tk_vars = get_config().tk_vars

        for cmd in self.actionbtns.keys():
            btnact = self.actionbtns[cmd]
            if tk_vars["runningtask"].get():
                ttl = "Terminate"
                hlp = "Exit the running process"
            else:
                ttl = cmd.title()
                hlp = "Run the {} script".format(cmd.title())
            logger.debug("Updated Action Button: '%s'", ttl)
            btnact.config(text=ttl)
            Tooltip(btnact, text=hlp, wraplength=200)


class CommandTab(ttk.Frame):  # pylint: disable=too-many-ancestors
    """ Frame to hold each individual tab of the command notebook """

    def __init__(self, parent, category, command):
        logger.debug("Initializing %s: (category: '%s', command: '%s')",
                     self.__class__.__name__, category, command)
        ttk.Frame.__init__(self, parent)

        self.category = category
        self.actionbtns = parent.actionbtns
        self.command = command

        self.build_tab()
        logger.debug("Initialized %s", self.__class__.__name__)

    def build_tab(self):
        """ Build the tab """
        logger.debug("Build Tab: '%s'", self.command)
        OptionsFrame(self)

        self.add_frame_separator()

        ActionFrame(self)
        logger.debug("Built Tab: '%s'", self.command)

    def add_frame_separator(self):
        """ Add a separator between top and bottom frames """
        logger.debug("Add frame seperator")
        sep = ttk.Frame(self, height=2, relief=tk.RIDGE)
        sep.pack(fill=tk.X, pady=(5, 0), side=tk.TOP)
        logger.debug("Added frame seperator")


class OptionsFrame(ttk.Frame):  # pylint: disable=too-many-ancestors
    """ Options Frame - Holds the Options for each command """

    def __init__(self, parent):
        logger.debug("Initializing %s", self.__class__.__name__)
        ttk.Frame.__init__(self, parent)
        self.pack(side=tk.TOP, fill=tk.BOTH, expand=True)

        self.command = parent.command

        self.canvas = tk.Canvas(self, bd=0, highlightthickness=0)
        self.canvas.pack(side=tk.LEFT, fill=tk.BOTH, expand=True)

        self.optsframe = ttk.Frame(self.canvas)
        self.optscanvas = self.canvas.create_window((0, 0),
                                                    window=self.optsframe,
                                                    anchor=tk.NW)
        self.chkbtns = self.checkbuttons_frame()

        self.build_frame()
        cli_opts = get_config().cli_opts
        cli_opts.set_context_option(self.command)
        logger.debug("Initialized %s", self.__class__.__name__)

    def checkbuttons_frame(self):
        """ Build and format frame for holding the check buttons """
        logger.debug("Add Options CheckButtons Frame")
        container = ttk.Frame(self.optsframe)

        lbl = ttk.Label(container, text="Options", width=16, anchor=tk.W)
        lbl.pack(padx=5, pady=5, side=tk.LEFT, anchor=tk.N)

        chkframe = ttk.Frame(container)
        chkframe.pack(side=tk.BOTTOM, expand=True)

        chkleft = ttk.Frame(chkframe, name="leftFrame")
        chkleft.pack(side=tk.LEFT, anchor=tk.N, expand=True)

        chkright = ttk.Frame(chkframe, name="rightFrame")
        chkright.pack(side=tk.RIGHT, anchor=tk.N, expand=True)
        logger.debug("Added Options CheckButtons Frame")

        return container, chkframe

    def build_frame(self):
        """ Build the options frame for this command """
        logger.debug("Add Options Frame")
        self.add_scrollbar()
        self.canvas.bind("<Configure>", self.resize_frame)

        cli_opts = get_config().cli_opts
        for option in cli_opts.gen_command_options(self.command):
            optioncontrol = OptionControl(self.command,
                                          option,
                                          self.optsframe,
                                          self.chkbtns[1])
            optioncontrol.build_full_control()

        if self.chkbtns[1].winfo_children():
            self.chkbtns[0].pack(side=tk.BOTTOM, fill=tk.X, expand=True)
        logger.debug("Added Options Frame")

    def add_scrollbar(self):
        """ Add a scrollbar to the options frame """
        logger.debug("Add Options Scrollbar")
        scrollbar = ttk.Scrollbar(self, command=self.canvas.yview)
        scrollbar.pack(side=tk.RIGHT, fill=tk.Y)
        self.canvas.config(yscrollcommand=scrollbar.set)
        self.optsframe.bind("<Configure>", self.update_scrollbar)
        logger.debug("Added Options Scrollbar")

    def update_scrollbar(self, event):  # pylint: disable=unused-argument
        """ Update the options frame scrollbar """
        self.canvas.configure(scrollregion=self.canvas.bbox("all"))

    def resize_frame(self, event):
        """ Resize the options frame to fit the canvas """
        logger.debug("Resize Options Frame")
        canvas_width = event.width
        self.canvas.itemconfig(self.optscanvas, width=canvas_width)
        logger.debug("Resized Options Frame")


class OptionControl():
    """ Build the correct control for the option parsed and place it on the
    frame """

    def __init__(self, command, option, option_frame, checkbuttons_frame):
        logger.debug("Initializing %s", self.__class__.__name__)
        self.command = command
        self.option = option
        self.option_frame = option_frame
        self.chkbtns = checkbuttons_frame
        logger.debug("Initialized %s", self.__class__.__name__)

    def build_full_control(self):
        """ Build the correct control type for the option passed through """
        logger.debug("Build option control")
        ctl = self.option["control"]
        ctltitle = self.option["control_title"]
        sysbrowser = self.option["filesystem_browser"]
        ctlhelp = self.format_help(ctltitle)
        dflt = self.option.get("default", "")
        if self.option.get("nargs", None) and isinstance(dflt, (list, tuple)):
            dflt = ' '.join(str(val) for val in dflt)
        if ctl == ttk.Checkbutton:
            dflt = self.option.get("default", False)
        choices = self.option["choices"] if ctl == ttk.Combobox else None
        min_max = self.option["min_max"] if ctl == ttk.Scale else None

        ctlframe = self.build_one_control_frame()

        if ctl != ttk.Checkbutton:
            self.build_one_control_label(ctlframe, ctltitle)

        ctlvars = (ctl, ctltitle, dflt, ctlhelp)
        self.option["value"] = self.build_one_control(ctlframe,
                                                      ctlvars,
                                                      choices,
                                                      min_max,
                                                      sysbrowser)
        logger.debug("Built option control")

    def format_help(self, ctltitle):
        """ Format the help text for tooltips """
        logger.debug("Format control help: '%s'", ctltitle)
        ctlhelp = self.option.get("help", "")
        if ctlhelp.startswith("R|"):
            ctlhelp = ctlhelp[2:].replace("\n\t", " ").replace("\n'", "\n\n'")
        else:
            ctlhelp = " ".join(ctlhelp.split())
        ctlhelp = ctlhelp.replace("%%", "%")
        ctlhelp = ". ".join(i.capitalize() for i in ctlhelp.split(". "))
        ctlhelp = ctltitle + " - " + ctlhelp
        logger.debug("Formatted control help: (title: '%s', help: '%s'", ctltitle, ctlhelp)
        return ctlhelp

    def build_one_control_frame(self):
        """ Build the frame to hold the control """
        logger.debug("Build control frame")
        frame = ttk.Frame(self.option_frame)
        frame.pack(fill=tk.X, expand=True)
        logger.debug("Built control frame")
        return frame

    @staticmethod
    def build_one_control_label(frame, control_title):
        """ Build and place the control label """
        logger.debug("Build control label: '%s'", control_title)
        lbl = ttk.Label(frame, text=control_title, width=16, anchor=tk.W)
        lbl.pack(padx=5, pady=5, side=tk.LEFT, anchor=tk.N)
        logger.debug("Built control label: '%s'", control_title)

    def build_one_control(self, frame, controlvars, choices, min_max, sysbrowser):
        """ Build and place the option controls """
        logger.debug("Build control: (controlvars: %s, choices: %s, min_max: %s, sysbrowser: %s",
                     controlvars, choices, min_max, sysbrowser)
        control, control_title, default, helptext = controlvars
        default = default if default is not None else ""

        var = tk.BooleanVar(frame) if control == ttk.Checkbutton else tk.StringVar(frame)
        var.set(default)

        if sysbrowser:
            self.add_browser_buttons(frame, sysbrowser, var)

        if control == ttk.Checkbutton:
            self.checkbutton_to_checkframe(control,
                                           control_title,
                                           var,
                                           helptext)
        elif control == ttk.Scale:
            self.slider_control(control,
                                frame,
                                var,
                                min_max,
                                helptext)
        else:
            self.control_to_optionsframe(control,
                                         frame,
                                         var,
                                         choices,
                                         helptext)
        logger.debug("Built control: '%s'", control_title)
        return var

    def checkbutton_to_checkframe(self, control, control_title, var, helptext):
        """ Add checkbuttons to the checkbutton frame """
        logger.debug("Add control checkframe: '%s'", control_title)
        leftframe = self.chkbtns.children["leftFrame"]
        rightframe = self.chkbtns.children["rightFrame"]
        chkbtn_count = len({**leftframe.children, **rightframe.children})

        frame = leftframe if chkbtn_count % 2 == 0 else rightframe

        ctl = control(frame, variable=var, text=control_title)
        ctl.pack(side=tk.TOP, padx=5, pady=5, anchor=tk.W)

        Tooltip(ctl, text=helptext, wraplength=200)
        logger.debug("Added control checkframe: '%s'", control_title)

    def slider_control(self, control, frame, tk_var, min_max, helptext):
        """ A slider control with corresponding Entry box """
        logger.debug("Add slider control to Options Frame: %s", control)
        d_type = self.option.get("type", float)
        rnd = self.option.get("rounding", 2) if d_type == float else self.option.get("rounding", 1)

        tbox = ttk.Entry(frame, width=8, textvariable=tk_var, justify=tk.RIGHT)
        tbox.pack(padx=(0, 5), side=tk.RIGHT)
        ctl = control(
            frame,
            variable=tk_var,
            command=lambda val, var=tk_var, dt=d_type, rn=rnd, mm=min_max:
            set_slider_rounding(val, var, dt, rn, mm))
        ctl.pack(padx=5, pady=5, fill=tk.X, expand=True)
        rc_menu = ContextMenu(ctl)
        rc_menu.cm_bind()
        ctl["from_"] = min_max[0]
        ctl["to"] = min_max[1]

        Tooltip(ctl, text=helptext, wraplength=720)
        Tooltip(tbox, text=helptext, wraplength=720)
        logger.debug("Added slider control to Options Frame: %s", control)

    @staticmethod
    def control_to_optionsframe(control, frame, var, choices, helptext):
        """ Standard non-check buttons sit in the main options frame """
        logger.debug("Add control to Options Frame: %s", control)
        ctl = control(frame, textvariable=var)
        ctl.pack(padx=5, pady=5, fill=tk.X, expand=True)
        rc_menu = ContextMenu(ctl)
        rc_menu.cm_bind()
        if control == ttk.Combobox:
            logger.debug("Adding combo choices: %s", choices)
            ctl["values"] = [choice for choice in choices]
        Tooltip(ctl, text=helptext, wraplength=920)
        logger.debug("Added control to Options Frame: %s", control)

    def add_browser_buttons(self, frame, sysbrowser, filepath):
        """ Add correct file browser button for control """
        logger.debug("Adding browser buttons: (sysbrowser: '%s', filepath: '%s'",
                     sysbrowser, filepath)
        for browser in sysbrowser:
            img = get_images().icons[browser]
            action = getattr(self, "ask_" + browser)
            filetypes = self.option.get("filetypes", "default")
            fileopn = ttk.Button(frame,
                                 image=img,
                                 command=lambda cmd=action: cmd(filepath, filetypes))
            fileopn.pack(padx=(0, 5), side=tk.RIGHT)
            logger.debug("Added browser buttons: (action: %s, filetypes: %s",
                         action, filetypes)

    @staticmethod
    def ask_folder(filepath, filetypes=None):
        """ Pop-up to get path to a directory
            :param filepath: tkinter StringVar object
            that will store the path to a directory.
            :param filetypes: Unused argument to allow
            filetypes to be given in ask_load(). """
        dirname = FileHandler("dir", filetypes).retfile
        if dirname:
            logger.debug(dirname)
            filepath.set(dirname)

    @staticmethod
    def ask_load(filepath, filetypes):
        """ Pop-up to get path to a file """
        filename = FileHandler("filename", filetypes).retfile
        if filename:
            logger.debug(filename)
            filepath.set(filename)

    @staticmethod
    def ask_save(filepath, filetypes=None):
        """ Pop-up to get path to save a new file """
        filename = FileHandler("savefilename", filetypes).retfile
        if filename:
            logger.debug(filename)
            filepath.set(filename)

    @staticmethod
    def ask_nothing(filepath, filetypes=None):  # pylint: disable=unused-argument
        """ Method that does nothing, used for disabling open/save pop up """
        return

    def ask_context(self, filepath, filetypes):
        """ Method to pop the correct dialog depending on context """
        logger.debug("Getting context filebrowser")
        selected_action = self.option["action_option"].get()
        selected_variable = self.option["dest"]
        filename = FileHandler("context",
                               filetypes,
                               command=self.command,
                               action=selected_action,
                               variable=selected_variable).retfile
        if filename:
            logger.debug(filename)
            filepath.set(filename)


class ActionFrame(ttk.Frame):  # pylint: disable=too-many-ancestors
    """Action Frame - Displays action controls for the command tab """

    def __init__(self, parent):
        logger.debug("Initializing %s: (command: '%s')", self.__class__.__name__, parent.command)
        ttk.Frame.__init__(self, parent)
        self.pack(fill=tk.BOTH, padx=5, pady=5, side=tk.BOTTOM, anchor=tk.N)

        self.command = parent.command
        self.title = self.command.title()

        self.add_action_button(parent.category,
                               parent.actionbtns)
        self.add_util_buttons()
        logger.debug("Initialized %s", self.__class__.__name__)

    def add_action_button(self, category, actionbtns):
        """ Add the action buttons for page """
        logger.debug("Add action buttons: '%s'", self.title)
        actframe = ttk.Frame(self)
        actframe.pack(fill=tk.X, side=tk.LEFT)
        tk_vars = get_config().tk_vars

        var_value = "{},{}".format(category, self.command)

        btnact = ttk.Button(actframe,
                            text=self.title,
                            width=10,
                            command=lambda: tk_vars["action"].set(var_value))
        btnact.pack(side=tk.LEFT)
        Tooltip(btnact,
                text="Run the {} script".format(self.title),
                wraplength=200)
        actionbtns[self.command] = btnact

        btngen = ttk.Button(actframe,
                            text="Generate",
                            width=10,
                            command=lambda: tk_vars["generate"].set(var_value))
        btngen.pack(side=tk.RIGHT, padx=5)
        Tooltip(btngen,
                text="Output command line options to the console",
                wraplength=200)
        logger.debug("Added action buttons: '%s'", self.title)

    def add_util_buttons(self):
        """ Add the section utility buttons """
        logger.debug("Add util buttons")
        utlframe = ttk.Frame(self)
        utlframe.pack(side=tk.RIGHT)

        config = get_config()
        for utl in ("load", "save", "clear", "reset"):
            logger.debug("Adding button: '%s'", utl)
            img = get_images().icons[utl]
            action_cls = config if utl in (("save", "load")) else config.cli_opts
            action = getattr(action_cls, utl)
            btnutl = ttk.Button(utlframe,
                                image=img,
                                command=lambda cmd=action: cmd(self.command))
            btnutl.pack(padx=2, side=tk.LEFT)
            Tooltip(btnutl,
                    text=utl.capitalize() + " " + self.title + " config",
                    wraplength=200)
        logger.debug("Added util buttons")