import enum
import shutil
from pathlib import Path
import json
import tkinter
from tkinter import ttk
from tkinter import filedialog
from tkinter import messagebox
import webbrowser
from typing import Generator

from source.gui import better_gui_error, mystuff, mod_settings
from source.mkw.Game import Game
from source.mkw.ModConfig import ModConfig
from source.option import Option
from source.progress import Progress
from source.translation import translate as _
from source import plugins
from source import *
import os

from source.wt.wit import Extension


class SourceGameError(Exception):
    def __init__(self, path: Path | str):
        super().__init__(f"Invalid path for source game : {path}")


class DestinationGameError(Exception):
    def __init__(self, path: Path | str):
        super().__init__(f"Invalid path for destination game : {path}")


class InstallerState(enum.Enum):
    IDLE = 0
    INSTALLING = 1


# Main window for the installer
class Window(tkinter.Tk):
    def __init__(self, options: Option):
        super().__init__()
        self.root = self

        self.options: Option = options

        self.title(_("INSTALLER_TITLE"))
        self.resizable(False, False)
        self.iconbitmap("./assets/icon.ico")

        # menu bar
        self.menu = Menu(self)
        self.config(menu=self.menu)

        # main frame
        self.select_pack = SelectPack(self)
        self.select_pack.grid(row=1, column=1, sticky="w")

        self.source_game = SourceGame(self)
        self.source_game.grid(row=2, column=1, sticky="nsew")

        self.destination_game = DestinationGame(self)
        self.destination_game.grid(row=3, column=1, sticky="nsew")

        self.button_install = ButtonInstall(self)
        self.button_install.grid(row=4, column=1, sticky="nsew")

        self.progress_bar = ProgressBar(self)
        self.progress_bar.grid(row=5, column=1, sticky="nsew")

        self.set_state(InstallerState.IDLE)

    def run(self) -> None:
        """
        Run the installer
        """
        plugins.initialise()
        self.after(0, self.run_after)
        self.mainloop()

    @staticmethod
    def run_after() -> None:
        """
        Run after the installer has been initialised, can be used to add plugins
        :return:
        """
        return None

    def set_state(self, state: InstallerState) -> None:
        """
        Set the progress bar state when the installer change state
        :param state: state of the installer
        :return:
        """
        for child in self.winfo_children():
            getattr(child, "set_state", lambda *_: "pass")(state)

    def progress_function(self, func_gen: Generator[Progress, None, None]) -> None:
        """
        Run a generator function that yield status for the progress bar
        :return:
        """
        # get the generator data yield by the generator function
        for progress in func_gen:
            if progress.title is not None: self.progress_bar.set_title(progress.title)
            if progress.part is not None: self.progress_bar.part(progress.part)
            if progress.set_part is not None: self.progress_bar.set_part(progress.set_part)
            if progress.max_part is not None: self.progress_bar.set_max_part(progress.max_part)

            if progress.description is not None: self.progress_bar.set_description(progress.description)
            if progress.step is not None: self.progress_bar.step(progress.step)
            if progress.set_step is not None: self.progress_bar.set_step(progress.set_step)
            if progress.max_step is not None: self.progress_bar.set_max_step(progress.max_step)
            if progress.determinate is not None: self.progress_bar.set_determinate(progress.determinate)

    def get_mod_config(self) -> ModConfig:
        """
        Get the mod configuration
        :return: Get the mod configuration
        """
        return self.select_pack.mod_config

    def get_source_path(self) -> Path:
        """
        Get the path of the source game
        :return: path of the source game
        """
        return self.source_game.get_path()

    def get_destination_path(self) -> Path:
        """
        Get the path of the destination game
        :return: path of the destination game
        """
        return self.destination_game.get_path()

    def get_output_type(self) -> Extension:
        """
        Get the output type
        :return: output type
        """
        return self.destination_game.get_output_type()


# Menu bar
class Menu(tkinter.Menu):
    def __init__(self, master):
        super().__init__(master)
        self.root = master.root

        self.language = self.Language(self)
        self.advanced = self.Advanced(self)
        self.help = self.Help(self)

    # Language menu
    class Language(tkinter.Menu):
        def __init__(self, master: tkinter.Menu):
            super().__init__(master, tearoff=False)
            self.root = master.root
        
            master.add_cascade(label=_("LANGUAGE_SELECTION"), menu=self)

            self.variable = tkinter.StringVar(value=self.root.options["language"])

            def callback(file: Path):
                def func(): self.root.options["language"] = file.stem
                return func

            for file in Path("./assets/language/").iterdir():
                lang_json = json.loads(file.read_text(encoding="utf8"))
                self.add_radiobutton(
                    label=lang_json["name"],
                    value=file.stem,
                    variable=self.variable,
                    command=callback(file)
                )

    # Advanced menu
    class Advanced(tkinter.Menu):
        def __init__(self, master: tkinter.Menu):
            super().__init__(master, tearoff=False)
            self.root = master.root

            master.add_cascade(label=_("ADVANCED_CONFIGURATION"), menu=self)
            self.add_command(label=_("OPEN_MYSTUFF_WINDOW"), command= mystuff.Window)

            self.threads_used = self.ThreadsUsed(self)

        class ThreadsUsed(tkinter.Menu):
            def __init__(self, master: tkinter.Menu):
                super().__init__(master, tearoff=False)
                self.root = master.root
                
                master.add_cascade(label=_("THREADS_USED"), menu=self)

                self.variable = tkinter.IntVar(value=self.root.options["threads"])

                def callback(threads_amount: int):
                    def func(): self.root.options["threads"] = threads_amount
                    return func

                for i in [1, 2, 4, 8, 12, 16]:
                    self.add_radiobutton(
                        label=_("USE", f" {i} ", "THREADS"),
                        value=i,
                        variable=self.variable,
                        command=callback(i),
                    )

    # Help menu
    class Help(tkinter.Menu):
        def __init__(self, master: tkinter.Menu):
            super().__init__(master, tearoff=False)
            self.root = master.root

            master.add_cascade(label="Help", menu=self)
            self.menu_id = self.master.index(tkinter.END)

            self.add_command(label="Discord", command=lambda: webbrowser.open(discord_url))
            self.add_command(label="Github Wiki", command=lambda: webbrowser.open(github_wiki_url))

    def set_installation_state(self, state: InstallerState) -> bool:
        """
        Set the installation state of the installer
        :param state: The state to set the installer to
        :return: True if the state was set, False if not
        """

    def set_state(self, state: InstallerState) -> None:
        """
        Set the progress bar state when the installer change state
        :param state: state of the installer
        :return:
        """
        # get the last child id of the menu

        for child_id in range(1, self.index(tkinter.END) + 1):
            # don't modify the state of the help menu
            if child_id == self.help.menu_id: continue

            match state:
                case state.IDLE: self.entryconfigure(child_id, state=tkinter.NORMAL)
                case state.INSTALLING: self.entryconfigure(child_id, state=tkinter.DISABLED)


# Select game frame
class SourceGame(ttk.LabelFrame):
    def __init__(self, master: tkinter.Tk):
        super().__init__(master, text="Original Game File")
        self.root = master.root
        
        self.columnconfigure(1, weight=1)

        self.entry = ttk.Entry(self, width=55)
        self.entry.grid(row=1, column=1, sticky="nsew")

        self.button = ttk.Button(self, text="...", width=2, command=self.select)
        self.button.grid(row=1, column=2, sticky="nsew")

    def select(self) -> None:
        """
        Select the source game
        :return:
        """
        path = Path(tkinter.filedialog.askopenfilename(
            title=_("SELECT_SOURCE_GAME"),
            filetypes=[(_("WII GAMES"), "*.iso *.ciso *.wbfs *.dol")],
        ))
        # if the user didn't select any file, return None
        if not path.exists():
            messagebox.showerror(_("ERROR"), _("ERROR_INVALID_SOURCE_GAME"))
            return

        self.set_path(path)

    def set_path(self, path: Path) -> None:
        """
        Set the source game path
        :param path:
        :return:
        """
        self.entry.delete(0, tkinter.END)
        self.entry.insert(0, str(path.absolute()))

        if path.suffix == ".dol": path = path.parent.parent
        self.root.destination_game.set_path(path.parent)

    def get_path(self) -> Path:
        """
        Get the source game path
        :return: the game path
        """
        path = Path(self.entry.get())
        if not path.exists(): raise SourceGameError(path)
        return path

    def set_state(self, state: InstallerState) -> None:
        """
        Set the progress bar state when the installer change state
        :param state: state of the installer
        :return:
        """
        for child in self.winfo_children():
            match state:
                case InstallerState.IDLE: child.config(state="normal")
                case InstallerState.INSTALLING: child.config(state="disabled")


# Select game destination frame
class DestinationGame(ttk.LabelFrame):
    def __init__(self, master: tkinter.Tk):
        super().__init__(master, text="Game Directory Destination")
        self.root = master.root
        
        self.columnconfigure(1, weight=1)

        self.entry = ttk.Entry(self)
        self.entry.grid(row=1, column=1, sticky="nsew")

        self.output_type = ttk.Combobox(self, width=5, values=[extension.name for extension in Extension])
        self.output_type.set(Extension.WBFS.name)
        self.output_type.grid(row=1, column=2, sticky="nsew")

        self.button = ttk.Button(self, text="...", width=2, command=self.select)
        self.button.grid(row=1, column=3, sticky="nsew")

    def select(self) -> None:
        """
        Select the source game
        :return:
        """
        path = Path(tkinter.filedialog.askdirectory(
            title=_("SELECT_DESTINATION_GAME"),
        ))

        path.mkdir(mode=0o777, parents=True, exist_ok=True)

        self.set_path(path)

    def set_path(self, path: Path):
        if not os.access(path, os.W_OK):
            messagebox.showwarning(_("WARNING"), _("WARNING_DESTINATION_GAME_NOT_WRITABLE"))

        self.entry.delete(0, tkinter.END)
        self.entry.insert(0, str(path.absolute()))

    def get_path(self) -> Path:
        """
        Get the destination game path
        :return: the game path
        """
        path = Path(self.entry.get())
        if not path.exists(): raise DestinationGameError(path)
        return path

    def get_output_type(self) -> Extension:
        """
        Get the output type
        :return: the output type
        """
        return Extension[self.output_type.get()]

    def set_state(self, state: InstallerState) -> None:
        """
        Set the progress bar state when the installer change state
        :param state: state of the installer
        :return:
        """
        for child in self.winfo_children():
            match state:
                case InstallerState.IDLE:
                    if child == self.output_type: child.config(state="readonly")
                    else: child.config(state="normal")
                case InstallerState.INSTALLING: child.config(state="disabled")


# Install button
class ButtonInstall(ttk.Button):
    def __init__(self, master: tkinter.Tk):
        super().__init__(master, text="Install", command=self.install)
        self.root = master.root

    @threaded
    @better_gui_error
    def install(self):
        try:
            self.root.set_state(InstallerState.INSTALLING)

            # check if the user entered a source path
            source_path = self.root.get_source_path()
            if str(source_path) == ".":
                messagebox.showerror(_("ERROR"), _("ERROR_INVALID_SOURCE_GAME"))
                return

            # check if the user entered a destination path
            destination_path = self.root.get_destination_path()
            if str(destination_path) == ".":
                messagebox.showerror(_("ERROR"), _("ERROR_INVALID_DESTINATION_GAME"))
                return

            # if there is no more space on the installer drive, show a warning
            if shutil.disk_usage(".").free < minimum_space_available:
                if not messagebox.askokcancel(_("WARNING"), _("WARNING_LOW_SPACE_CONTINUE")):
                    return

            # if there is no more space on the destination drive, show a warning
            elif shutil.disk_usage(destination_path).free < minimum_space_available:
                if not messagebox.askokcancel(_("WARNING"), _("WARNING_LOW_SPACE_CONTINUE")):
                    return

            game = Game(source_path)
            mod_config = self.root.get_mod_config()
            output_type = self.root.get_output_type()

            self.root.progress_function(
                game.install_mod(
                    dest=destination_path,
                    mod_config=mod_config,
                    output_type=output_type,
                    options=self.root.options
                )
            )

            message_texts = mod_config.messages.get("installation_completed", {}).get("text", {})
            message = message_texts.get(self.root.options["language"])
            if message is None: message = message_texts.get("*")
            if message is None: message = _('NO_MESSAGE_FROM_AUTHOR')
            message = mod_config.multiple_safe_eval(message)()

            messagebox.showinfo(
                _("INSTALLATION_COMPLETED"),
                f"{_('INSTALLATION_FINISHED_WITH_SUCCESS')}\n{_('MESSAGE_FROM_MOD_AUTHOR')}:\n\n{message}"
            )

        finally:
            self.root.set_state(InstallerState.IDLE)

    def set_state(self, state: InstallerState) -> None:
        """
        Set the progress bar state when the installer change state
        :param state: state of the installer
        :return:
        """
        match state:
            case InstallerState.IDLE: self.config(state="normal")
            case InstallerState.INSTALLING: self.config(state="disabled")


# Progress bar
class ProgressBar(ttk.LabelFrame):
    def __init__(self, master: tkinter.Tk):
        super().__init__(master)
        self.root = master.root

        # make the element fill the whole frame
        self.columnconfigure(1, weight=1)

        self.progress_bar_part = ttk.Progressbar(self, orient="horizontal")
        self.progress_bar_part.grid(row=1, column=1, sticky="nsew")

        self.title = ttk.Label(self, text="", anchor="center", font=("TkDefaultFont", 10), wraplength=350)
        self.title.grid(row=2, column=1, sticky="nsew")

        self.progress_bar_step = ttk.Progressbar(self, orient="horizontal")
        self.progress_bar_step.grid(row=3, column=1, sticky="nsew")

        self.description = ttk.Label(self, text="", anchor="center", font=("TkDefaultFont", 10), wraplength=350)
        self.description.grid(row=4, column=1, sticky="nsew")

    def set_state(self, state: InstallerState) -> None:
        """
        Set the progress bar state when the installer change state
        :param state: state of the installer
        :return:
        """
        match state:
            case InstallerState.IDLE: self.grid_remove()
            case InstallerState.INSTALLING: self.grid()

    def set_title(self, title: str): self.title.config(text=title)
    def set_max_part(self, maximum: int): self.progress_bar_part.configure(maximum=maximum)
    def set_part(self, value: int): self.progress_bar_part.configure(value=value)
    def part(self, value: int = 1): self.progress_bar_part.step(value)

    def set_description(self, desc: str) -> None: self.description.config(text=desc)
    def set_max_step(self, maximum: int) -> None: self.progress_bar_step.configure(maximum=maximum)
    def set_step(self, value: int) -> None: self.progress_bar_step.configure(value=value)
    def step(self, value: int = 1) -> None: self.progress_bar_step.step(value)

    def set_determinate(self, value: bool) -> None:
        """
        Set the progress bar determinate value
        :param value: the value
        :return:
        """
        if value:
            if self.progress_bar["mode"] == "indeterminate": self.progress_bar.stop()
            self.progress_bar.configure(mode="determinate")

        else:
            if self.progress_bar["mode"] == "determinate": self.progress_bar.start(50)
            self.progress_bar.configure(mode="indeterminate")


# Combobox to select the pack
class SelectPack(ttk.Frame):
    def __init__(self, master: tkinter.Tk):
        super().__init__(master)
        self.root = master.root

        self.combobox = ttk.Combobox(self)
        self.combobox.grid(row=1, column=1, sticky="NEWS")

        self.button_settings = ttk.Button(self, text="...", width=2, command=self.open_mod_configuration)
        self.button_settings.grid(row=1, column=2, sticky="NEWS")

        self.mod_config: ModConfig | None = None
        self.packs: list[Path] = []

        self.refresh_packs()
        self.select(index=0)

        self.combobox.bind("<<ComboboxSelected>>", lambda _: self.select())

    def open_mod_configuration(self) -> None:
        mod_settings.Window(self.mod_config)

    def refresh_packs(self) -> None:
        """
        Refresh the list of packs
        :return:
        """
        self.packs = []

        for pack in Path("./Pack/").iterdir():
            if self.is_valid_pack(pack):
                self.packs.append(pack)

        self.combobox["values"] = [pack.name for pack in self.packs]

    def select(self, index: int = None) -> None:
        """
        When the selection is changed
        :index: the index of the selection. If none, use the selected index
        :return:
        """
        index = index if index is not None else self.combobox.current()
        pack = self.packs[index]
        self.set_path(pack)
        self.combobox.set(pack.name)

    @better_gui_error
    def set_path(self, pack: Path) -> None:
        """
        Set the pack to install
        :param pack: the pack
        :return:
        """
        self.mod_config = ModConfig.from_file(pack / "mod_config.json")

    @classmethod
    def is_valid_pack(cls, path: Path) -> bool:
        """
        Check if the path is a valid pack
        :param path: the path
        :return: True if the path is a valid pack
        """
        return all([
            (path / "mod_config.json").exists(),
        ])

    def set_state(self, state: InstallerState) -> None:
        """
        Set the progress bar state when the installer change state
        :param state: state of the installer
        :return:
        """
        match state:
            case InstallerState.IDLE:
                self.combobox.config(state="readonly")
                self.button_settings.config(state="normal")
            case InstallerState.INSTALLING:
                self.combobox.config(state="disabled")
                self.button_settings.config(state="disabled")