import json
import tkinter as tk
from pathlib import Path
from tkinter import ttk, messagebox


class EngineSettingsGUI:
    def __init__(self, engine_name: str):
        self.config = dict()
        self.cfg_file = Path(engine_name + ".json")
        if self.cfg_file.exists():
            self.config = json.loads(self.cfg_file.read_text())

        self.window = tk.Tk()
        self.window.title(engine_name.capitalize() + " Settings")

        mainframe = ttk.Frame(self.window, padding="10")
        mainframe.grid(column=0, row=0, sticky=tk.N)
        self.window.columnconfigure(0, weight=1)
        self.window.rowconfigure(0, weight=1)

        self.username = tk.StringVar(value=self.config.get("username", ""))
        self.password = tk.StringVar(value=self.config.get("password", ""))
        self.proxy_http = tk.StringVar(
            value=self.config.get("proxies", dict()).get("http", "")
        )
        self.proxy_https = tk.StringVar(
            value=self.config.get("proxies", dict()).get("https", "")
        )

        self.date = tk.BooleanVar(value=self.config.get("torrentDate", True))
        self.magnet = tk.BooleanVar(value=self.config.get("magnet", False))
        self.proxy = tk.BooleanVar(value=self.config.get("proxy", False))

        ttk.Label(mainframe, text="Username:").grid(
            column=0, row=0, sticky=tk.W)
        ttk.Label(mainframe, text="Password:").grid(
            column=0, row=1, sticky=tk.W, rowspan=2)

        ttk.Entry(mainframe, width=25, textvariable=self.username, state=(
                    ("!" if self.config.get("username") else "") + tk.DISABLED)
                  ).grid(column=1, row=0, sticky=tk.EW, padx=(0, 5))
        ttk.Entry(mainframe, width=25, textvariable=self.password, state=(
                    ("!" if self.config.get("password") else "") + tk.DISABLED)
                  ).grid(column=1, row=1, rowspan=2, sticky=tk.EW, padx=(0, 5))

        ttk.Checkbutton(
            mainframe, text="Date before torrent", variable=self.date,
            onvalue=True
        ).grid(column=2, row=0, sticky=tk.W)
        ttk.Checkbutton(
            mainframe, text="Use magnet link", variable=self.magnet,
            onvalue=True, state=(
                    ("!" if self.config.get("magnet") else "") + tk.DISABLED)
        ).grid(column=2, row=1, sticky=tk.W)
        ttk.Checkbutton(
            mainframe, text="Proxy", variable=self.proxy, onvalue=True,
            command=self.proxy_action
        ).grid(column=2, row=2, sticky=tk.W)

        ttk.Label(mainframe, text="HTTP:").grid(column=0, row=3, sticky=tk.W)
        ttk.Label(mainframe, text="HTTPS:").grid(column=0, row=4, sticky=tk.W)

        proxy_state = tk.NORMAL if self.proxy.get() else tk.DISABLED
        self.http_entry = ttk.Entry(
            mainframe, textvariable=self.proxy_http, state=proxy_state
        )
        self.http_entry.grid(column=1, row=3, sticky=tk.EW,
                             padx=(0, 5), pady=(0, 5))
        self.https_entry = ttk.Entry(
            mainframe, textvariable=self.proxy_https, state=proxy_state
        )
        self.https_entry.grid(column=1, row=4, sticky=tk.EW, padx=(0, 5))

        ttk.Button(
            mainframe, text="Save", command=self.close
        ).grid(column=2, row=3, rowspan=2)

        self.window.mainloop()

    def proxy_action(self) -> None:
        state = ("!" if self.proxy.get() else "") + tk.DISABLED
        self.http_entry.state([state])
        self.https_entry.state([state])

    def close(self) -> None:
        if self.config.get("username") and self.config.get("password"):
            if not (self.username.get() or self.password.get()):
                messagebox.showinfo("Error", "Some fields is empty!")
                return None

        if self.proxy.get() and not (self.http_entry.get()
                                     or self.https_entry.get()):
            messagebox.showinfo("Error", "Some fields is empty!")
            return None

        if self.config.get("username") and self.config.get("password"):
            self.config["username"] = self.username.get()
            self.config["password"] = self.password.get()
        self.config["proxy"] = self.proxy.get()
        if self.config["proxy"]:
            self.config["proxies"] = {
                "http": self.http_entry.get(),
                "https": self.https_entry.get()
            }
        self.config["torrentDate"] = self.date.get()
        if self.config.get("magnet"):
            self.config["magnet"] = self.magnet.get()
        self.cfg_file.write_text(
            json.dumps(self.config, indent=4, sort_keys=False)
        )
        self.window.destroy()


if __name__ == "__main__":
    settings = EngineSettingsGUI("engines/kinozal")
    print(settings.config)