import json
import os
import tkinter as tk
from tkinter import ttk
from tkinter import messagebox

path = "data/team.json"

class TeamsPage(tk.Frame):
    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)
        self.activeTeam = None

        self.teamKey = tk.StringVar()
        self.teamName = tk.StringVar()
        self.teamCountry = tk.StringVar()
        self.teamMembers = []

        self.teamSelector = ttk.Combobox(self, textvariable=self.teamKey)
        self.loadTeams()

        self.teamSelector.grid(column=1, row=1, sticky="ew")
        self.teamSelector.bind("<<ComboboxSelected>>", self.setActiveTeam)
        tk.Button(self, text="Delete", command=self.deleteTeam).grid(column=2, row=1, sticky="w")

        if len(self.teams) == 0:
            self.teamSelector.state(["readonly"])
        
        tk.Button(self, text="New Team", command=self.createTeam).grid(column=4, row=1, sticky="ew")

        tk.Label(self, text="Name:").grid(column=1, row=3)
        tk.Entry(self, textvariable=self.teamName).grid(column=2, row=3, sticky="ew")
        tk.Label(self, text="Country:").grid(column=1, row=4)
        tk.Entry(self, textvariable=self.teamCountry).grid(column=2, row=4, sticky="ew")
        tk.Label(self, text="Members:").grid(column=1, row=5)
        self.teamMembersGrid = ttk.Frame(self)
        self.teamMembersGrid.grid(column=2, row=5)

        tk.Button(self, text="Save", command=self.saveTeam).grid(column=2, row=6)

    def createTeam(self):
        self.activeTeam = None
        self.teamSelector.selection_clear()
        self.teamKey.set("")
        self.teamName.set("")
        self.teamCountry.set("")
        self.teamMembers = []
        self.renderTeamMembers()

    def loadTeams(self):
        self.teams = {}
        self.teamSelector["values"] = []
        if os.path.exists(path):
            file = open(path, "r")
            self.teams = json.loads(file.read())
            file.close()
        self.teamSelector["values"] = list(self.teams.keys())

    def deleteTeam(self):
        key = self.teamKey.get()
        confirmed = messagebox.askyesno(
	        message="Are you sure you want to delete team " + key + "?",
	        icon="question", title="Delete")
        
        if confirmed:
            self.loadTeams()
            del self.teams[key]
            
            file = open(path, "w")
            file.write(json.dumps(self.teams))
            file.close()
            
            self.loadTeams()
            self.createTeam()

    def saveTeam(self):
        key = self.teamKey.get()
        name = self.teamName.get()
        country = self.teamCountry.get()
        members = self.teamMembers

        if name != "" and country != "":
            self.loadTeams()
            team = {
                "name": name,
                "country": country,
                "members": members
            }

            if key != "" and key != name:
                del self.teams[key]
                self.teamKey.set(name)
            
            self.teams[name] = team

            file = open(path, "w")
            file.write(json.dumps(self.teams))
            file.close()
        self.loadTeams()

    def setActiveTeam(self, event):
        if self.teamKey.get() != "":
            self.activeTeam = self.teams[self.teamKey.get()]
            self.teamName.set(self.activeTeam["name"])
            self.teamCountry.set(self.activeTeam["country"])
            self.teamMembers = self.activeTeam["members"]

            self.renderTeamMembers()
        else:
            self.teamSelector.selection_clear()
    
    def renderTeamMembers(self):
        self.teamMembersGrid.destroy()
        self.teamMembersGrid = ttk.Frame(self)
        self.teamMembersGrid.grid(column=2, row=5)

        row = 1
        for m in self.teamMembers:
            tk.Label(self.teamMembersGrid, text=m["name"]).grid(column=1, row=row)
            tk.Label(self.teamMembersGrid, text=m["army"]).grid(column=2, row=row)
            tk.Button(self.teamMembersGrid, text="X", command=lambda: self.removeTeamMember(m)).grid(column=3, row=row)
            row += 1
        
        self.newTeamMemberName = tk.StringVar()
        self.newTeamMemberArmy = tk.StringVar()

        tk.Entry(self.teamMembersGrid, textvariable=self.newTeamMemberName).grid(column=1, row=row)
        tk.Entry(self.teamMembersGrid, textvariable=self.newTeamMemberArmy).grid(column=2, row=row)
        tk.Button(self.teamMembersGrid, text="+", command=self.addTeamMember).grid(column=3, row=row)

    def addTeamMember(self):
        name = self.newTeamMemberName.get()
        army = self.newTeamMemberArmy.get()
        if name != "" and army != "":
            self.teamMembers.append({
                "name": name,
                "army": army,
            })

        self.renderTeamMembers()

    def removeTeamMember(self, member):
        self.teamMembers.remove(member)
        self.renderTeamMembers()