from tkinter import *
from tkinter import ttk
import re
from tem_pip import runpip

# following structure that was recommended on http://stackoverflow.com/questions/17466561/best-way-to-structure-a-tkinter-application
# I also review the code from https://gist.github.com/mikofski/5851633 about how to type clean the notebook app code
class PIP_INTERFACE(Frame):
    def __init__(self, parent):
        Frame.__init__(self, parent)
        self.parent = parent
        self.parent.title("PIP Package Manager")
        self._create_panel()

    def _create_panel(self):
        nb = ttk.Notebook(self.parent, name="notebook")
        nb.pack(fill=BOTH, expand=Y, padx=2, pady=3)
        self._create_search_tab(nb)
        # I can make more tab function here

    def _create_search_tab(self, nb):
        # frame to hold content
        """
        Function for searching tab
        """
        frame = Frame(nb, name="search")

        search_text = StringVar()
        ttk.Entry(frame, width=10, textvariable=search_text).grid(column=1, row=1, columnspan=2, sticky=W+E)
        sr_scroll = ttk.Scrollbar(frame, orient=VERTICAL)
        sr_scroll.grid(column=1, row=2, sticky=S+E)
        search_return = Listbox(frame, height=10, bg="black", fg="white", yscrollcommand=sr_scroll)
        search_return.grid(column=0, row=2, columnspan=2, rowspan=10, sticky=N+W+S+E)

        search_button = ttk.Button(frame, text="Search", command=lambda: self.search_package(search_text, search_return))
        search_button.grid(column=3, row=1, sticky=W)

        search_information = Text(frame, width=20, height=10)
        search_information.insert(1.0, "This box will later use 'pip show package_name' to show the information")
        search_information.grid(column=2, row=2, columnspan=2, rowspan=10, sticky=N+W+S+E)

        install_button = Button(frame, text="Install")#command = self.install_package
        install_button.grid(column=2, row=12, sticky=N+W+E+S)

        uninstall_button = Button(frame, text="Uninstall")#command = self.uninstall_package
        uninstall_button.grid(column=3, row=12, sticky=N+W+E+S)

        nb.add(frame, text="Seach Package")

    def search_package(self, package_name, listbox):
        """
        run the search and update the list box
        """
        status, out, err = runpip("search {}".format(package_name.get()))
        # only extract the search package name and its version
        pattern = re.compile("(\w+.*?\(.*?\))")
        out_to_package_name = pattern.findall(out)

        if listbox is None:
            for i in range(0, len(out_to_package_name)):
                listbox.insert(i, out_to_package_name[i])
        else:
            listbox.delete(0, END)
            for i in range(0, len(out_to_package_name)):
                listbox.insert(i, out_to_package_name[i])

if __name__ == "__main__":
    root = Tk()
    PIP_INTERFACE(root)
    root.mainloop()