import os
import random
from tkinter import *
from PIL import ImageTk, Image, ImageOps
from util import Util


class ImageWindow:
    def __init__(self, app):
        self.app = app
        self.window = Toplevel(app.root)
        self.window.title("Image")
        self.window.geometry("1280x1024")
        self.option = {
            "bw": False,
            "mirror": False,
            "always_on_top": False,
        }
        self.images = []
        self.current_image = None
        self.image_label = None
        toolbar = Frame(self.window, bd=1, relief=RAISED)
        toolbar.pack(side=BOTTOM, fill=X)
        self.timer = 0
        self.timer_label = None
        self.timer_check = None
        self.timer_check = None

        next_button = Button(toolbar, relief=FLAT, compound=LEFT, text="next ➡️", command=self.next_image)
        next_button.pack(side=LEFT, padx=0, pady=0)

        self.bw_button = Button(toolbar, relief=FLAT, compound=LEFT, text="black&white",
                                command=self.toggle_black_white)
        self.bw_button.pack(side=LEFT, padx=0, pady=0)

        self.mirror_button = Button(toolbar, relief=FLAT, compound=LEFT, command=self.toggle_mirror, text="mirror")
        self.mirror_button.pack(side=LEFT, padx=0, pady=0)

        self.open_folder_button = Button(toolbar, relief=FLAT, compound=LEFT, command=self.open_folder
                                         , text="open folder")
        self.open_folder_button.pack(side=LEFT, padx=0, pady=0)

        self.always_on_top_button = Button(toolbar, relief=FLAT, compound=LEFT, command=self.toggle_always_on_top
                                         , text="always on top")
        self.always_on_top_button.pack(side=LEFT, padx=0, pady=0)
        self.always_on_top_check = None

        self.timer_button = Button(toolbar, relief=FLAT, compound=LEFT, command=self.toggle_timer, text="timer")
        self.timer_button.pack(side=LEFT, padx=0, pady=0)

        self.image_label = Label(self.window)
        self.image_label.pack(side=TOP, fill=BOTH, expand=1)

        self.timer_label = Label(toolbar, text=self.timer)
        self.timer_label.pack(side=RIGHT, ipadx=20)

    def update_timer(self, current):
        current -= 1
        if current > 0:
            self.timer_label.configure(text=Util.format_seconds(current))
            self.timer_check = self.window.after(1000, self.update_timer, current)
        else:
            self.window.after_cancel(self.timer_check)
            if len(self.images) == 0:
                self.window.destroy()
                self.window.update()
                return
            self.next_image()

    def next_image(self):
        if self.timer_check is not None:
            self.window.after_cancel(self.timer_check)
        self.display_new_image()
        self.display_new_timer()

    def toggle_black_white(self):
        self.option["bw"] = not self.option["bw"]
        self.bw_button.config(bg="blue" if self.option["bw"] else "grey85")

    def toggle_mirror(self):
        self.option["mirror"] = not self.option["mirror"]
        self.mirror_button.config(bg="blue" if self.option["mirror"] else "grey85")

    def toggle_timer(self):
        try:
            self.timer_label.pack_info()
            self.timer_label.pack_forget()
        except TclError:
            self.timer_label.pack(side=RIGHT, ipadx=20)

    def open_folder(self):
        os.startfile(self.app.selected_folder)

    def toggle_always_on_top(self):
        self.option["always_on_top"] = not self.option["always_on_top"]
        if self.option["always_on_top"]:
            self.always_on_top_button.config(bg="blue")
            self.stay_on_top()
        else:
            self.always_on_top_button.config(bg="grey85")
            self.window.after_cancel(self.always_on_top_check)

    def stay_on_top(self):
        # self.window.lift()
        self.window.attributes('-topmost', True)
        self.always_on_top_check = self.window.after(2000, self.stay_on_top)

    def lets_draw(self, images, timer):
        random.shuffle(images)
        self.images = images
        self.timer = timer
        self.next_image()

    def display_new_timer(self):
        self.timer_label.configure(text=self.timer)
        self.timer_check = self.window.after(1000, self.update_timer, self.timer)

    def display_new_image(self):
        image_path = self.images[0]
        self.images.pop(0)
        self.current_image = Image.open(image_path)

        self.resize_image()

        if self.option["bw"]:
            self.current_image = self.current_image.convert("L")

        if self.option["mirror"]:
            self.current_image = ImageOps.mirror(self.current_image)

        image_to_display = ImageTk.PhotoImage(self.current_image)

        self.image_label.configure(image=image_to_display)
        self.image_label.bind('<Configure>', lambda event: self.resize_image())
        self.image_label.image = image_to_display

    def resize_image(self):
        ma = self.window.winfo_toplevel()
        w, h = ma.winfo_width(), ma.winfo_height()

        # if self.current_image.size[0] > w or self.current_image.size[1] > h:
        if w < 21 or h < 21:  # too small
            w = 1280
            h = 1024
        self.current_image.thumbnail((w - 20, h - 20), Image.ANTIALIAS)

        print("resized: win %s >= img %s", (w, h), self.current_image.size)

        image_to_display = ImageTk.PhotoImage(self.current_image)
        self.image_label.configure(image=image_to_display)
        self.image_label.image = image_to_display