#
# Copyright (c) 2017 Intel Corporation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
from collections import OrderedDict

import os
from genericpath import isdir, isfile
from os import listdir
from os.path import join
from enum import Enum
from bokeh.models import Div
from bokeh.plotting import curdoc
import tkinter as tk
from tkinter import filedialog
import colorsys

from rl_coach.core_types import TimeTypes

patches = {}
signals_files = {}
selected_file = None
x_axis = ['Episode #']
x_axis_options = [time_type.value.name for time_type in TimeTypes]
x_axis_labels = [time_type.value.label for time_type in TimeTypes]
current_color = 0

# spinner
root_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
with open(os.path.join(root_dir, 'dashboard_components/spinner.css'), 'r') as f:
    spinner_style = """<style>{}</style>""".format(f.read())
    spinner_html = """<ul class="spinner"><li></li><li></li><li></li><li></li>
                      <li>
                        <br>
                        <span style="font-size: 24px; font-weight: bold; margin-left: -175px; width: 400px; 
                        position: absolute; text-align: center;">
                            {}
                        </span>
                      </li></ul>"""
spinner = Div(text="""""")
displayed_doc = "landing_page"
layouts = {}


def generate_color_range(N, I):
    HSV_tuples = [(x*1.0/N, 0.5, I) for x in range(N)]
    RGB_tuples = map(lambda x: colorsys.hsv_to_rgb(*x), HSV_tuples)
    for_conversion = []
    for RGB_tuple in RGB_tuples:
        for_conversion.append((int(RGB_tuple[0]*255), int(RGB_tuple[1]*255), int(RGB_tuple[2]*255)))
    hex_colors = [rgb_to_hex(RGB_tuple) for RGB_tuple in for_conversion]
    return hex_colors, for_conversion


# convert RGB tuple to hexadecimal code
def rgb_to_hex(rgb):
    return '#%02x%02x%02x' % rgb


# convert hexadecimal to RGB tuple
def hex_to_dec(hex):
    red = ''.join(hex.strip('#')[0:2])
    green = ''.join(hex.strip('#')[2:4])
    blue = ''.join(hex.strip('#')[4:6])
    return int(red, 16), int(green, 16), int(blue,16)


color_resolution = 1000
brightness = 0.75  # change to have brighter/darker colors
crx = list(range(1, color_resolution+1))  # the resolution is 1000 colors
cry = [5 for i in range(len(crx))]
crcolor, crRGBs = generate_color_range(color_resolution, brightness)  # produce spectrum


def display_boards():
    global displayed_doc
    if displayed_doc == "landing_page":
        doc.remove_root(doc.roots[0])
        doc.add_root(layouts["boards"])
        displayed_doc = "boards"


def show_spinner(text="Loading..."):
    spinner.text = spinner_style + spinner_html.format(text)


def hide_spinner():
    spinner.text = ""


# takes path to dir and recursively adds all its files to paths
def add_directory_csv_files(dir_path, paths=None):
    if not paths:
        paths = []

    for p in listdir(dir_path):
        path = join(dir_path, p)
        if isdir(path):
            # call recursively for each dir
            paths = add_directory_csv_files(path, paths)
        elif isfile(path) and path.endswith('.csv'):
            # add every file to the list
            paths.append(path)

    return paths




class DialogApp():

    def getFileDialog(self):
        application_window = tk.Tk()

        # Build a list of tuples for each file type the file dialog should display
        my_filetypes = [('csv files', '.csv')]

        # Ask the user to select a one or more file names.
        answer = filedialog.askopenfilename(parent=application_window,
                                             initialdir=os.getcwd(),
                                             title="Please select a file",
                                             filetypes=my_filetypes)
        application_window.destroy()
        return answer


    def getDirDialog(self):
        application_window = tk.Tk()

        # Ask the user to select a folder.
        answer = filedialog.askdirectory(parent=application_window,
                                         initialdir=os.getcwd(),
                                         title="Please select a folder")
        application_window.destroy()
        return answer





class RunType(Enum):
    SINGLE_FOLDER_SINGLE_FILE = 1
    SINGLE_FOLDER_MULTIPLE_FILES = 2
    MULTIPLE_FOLDERS_SINGLE_FILES = 3
    MULTIPLE_FOLDERS_MULTIPLE_FILES = 4
    UNKNOWN = 0


class FolderType(Enum):
    SINGLE_FILE = 1
    MULTIPLE_FILES = 2
    MULTIPLE_FOLDERS = 3
    EMPTY = 4


dialog = DialogApp()


doc = curdoc()