import tkinter
import tkinter.ttk
import os
import subprocess
import sys

from voussoirkit import pathclass

def load_programs():
    directory = os.path.join(os.path.dirname(__file__), 'PGUI')
    shortcuts = [os.path.join(directory, p) for p in os.listdir(directory)]
    shortcuts = [p for p in shortcuts if p.lower().endswith('.lnk')]
    shortcuts = [pathclass.Path(p) for p in shortcuts]
    return shortcuts

class PGUILauncher(tkinter.ttk.Frame):
    def __init__(self, parent):
        super().__init__(parent)

        self.parent = parent

        self.style = tkinter.ttk.Style()
        self.style.theme_use("clam")
        self.pack(fill=tkinter.BOTH, expand = 1)

        self.filter_var = tkinter.StringVar()
        self.filter_var.trace('w', self.filter)
        self.filter_entry = tkinter.Entry(self, textvariable=self.filter_var)
        self.filter_entry.grid(row=0, column=0, columnspan=999, sticky='ew')
        self.filter_entry.bind('<Return>', self.launch_filtered)
        self.filter_entry.bind('<Escape>', self.quit)
        self.filter_entry.focus()

        x = 0
        y = 1

        self.buttons = []
        self.buttonwidth = 12
        shortcuts = load_programs()
        for (index, shortcut) in enumerate(shortcuts):
            print(y, x)
            button = tkinter.ttk.Button(
                self,
                text=shortcut.replace_extension('').basename,
                command=lambda sc=shortcut: self.launch_program(sc),
            )
            button.shortcut = shortcut
            print(f'Creating button for {shortcut.basename}')
            button.configure(width=self.buttonwidth)
            button.grid(row=y, column=x)
            self.buttons.append(button)
            x += 1
            if x >= 3 and (index != len(shortcuts)-1):
                x = 0
                y += 1
        print(y, x)

        self.pack()
        self.update()

    def filter(self, *args):
        text = self.filter_entry.get().lower()
        for button in self.buttons:
            if text == '' or text in button['text'].lower():
                button['state'] = 'normal'
            else:
                button['state'] = 'disabled'

    def launch_filtered(self, *args):
        enabled = [b for b in self.buttons if b['state'].string == 'normal']
        if len(enabled) != 1:
            return

        button = enabled[0]
        self.launch_program(button.shortcut)

    def launch_program(self, shortcut):
        print('opening application', shortcut.basename)
        os.chdir(shortcut.parent.absolute_path)
        command = f'"{shortcut.absolute_path}"'
        subprocess.Popen(command, shell=True)
        self.quit()

    def quit(self, *args):
        return super().quit()


def main(argv):
    root = tkinter.Tk()
    root.title("PGUI")
    root.resizable(0,0)

    ex = PGUILauncher(root)

    width = root.winfo_reqwidth()
    height = root.winfo_reqheight()
    x_offset = (root.winfo_screenwidth() - width) / 2
    y_offset = (root.winfo_screenheight() - height) / 2

    root.geometry('%dx%d+%d+%d' % (width, height, x_offset, y_offset-50))
    root.mainloop()

if __name__ == '__main__':
    raise SystemExit(main(sys.argv[1:]))