import json
import os
import random
from os import getcwd
from os.path import isfile
from typing import Optional

import pandas as pd
from PyQt5.QtWidgets import QFileDialog, QInputDialog, QMessageBox


def dict_from_json(filename: str) -> dict:
    if isfile(filename):
        with open(filename) as f:
            return json.load(f)
    else:
        return {}


def mass_from_xlsx(path: str) -> dict:
    logs = {}
    xl = pd.ExcelFile(path)
    df = xl.parse(xl.sheet_names[0])
    for name in df.keys():
        logs[name] = list(df[name].values)
    return logs


def save_dict_as_json(data: dict, path: str = os.getcwd(),
                      filename: str = f'/temp_files/lay_name{random.randint(1, 1000)}') -> str:
    if path.__contains__('.json'):
        path_save = path
    elif filename.__contains__('.json'):
        path_save = filename
    elif filename.__contains__('.'):
        path_save = path + '/' + filename.split('/')[-1]
    else:
        path_save = path + f'/{filename}.json'
    path_save.replace("\\", '/')
    path_save.replace('//', '/')

    try:
        json_file = open(path_save, mode='x')
    except FileNotFoundError:
        os.mkdir(path_save.split('lay_name')[0])
        json_file = open(path_save, mode='x')
    except FileExistsError:
        json_file = open(path_save, mode='w')
    json.dump(data, json_file)
    json_file.close()
    return path_save


class FileEdit:
    # Messages
    create_project_default = 'Введите название проекта:'
    create_file_default = 'Введите название файла:'
    create_file_error = 'Не удалось создать файл,  \nфайл с таким именем уже существует'
    data_log = 'log.log'
    data_model_name = 'data.model'
    data_polygon_model = 'polygon.model'

    def __init__(self, project_path=''):
        self.project_path = project_path

    @property
    def model_path(self):
        if os.path.isdir(self.project_path):
            if os.path.isfile(self.project_path + '/' + FileEdit.data_model_name):
                pass
            else:
                save_dict_as_json({}, self.project_path, FileEdit.data_model_name)
            return self.project_path + '/' + FileEdit.data_model_name
        return ''

    @property
    def polygon_model_path(self):
        if os.path.isdir(self.project_path):
            return self.project_path + '/' + FileEdit.data_polygon_model

    @property
    def log_path(self):
        if os.path.isdir(self.project_path):
            return self.project_path + '/' + FileEdit.data_log

    def save_log(self, data):
        if not self.log_path:
            self.open_project()
        if self.log_path:
            save_dict_as_json(data=data, path=self.project_path, filename=self.log_path)

    def save_model_file(self, data) -> str:
        if not self.model_path:
            self.create_project()
        if self.model_path:
            return save_dict_as_json(data=data, path=self.project_path, filename=self.model_path)
        else:
            return ''

    def save_polygon_model(self, data) -> str:
        if not self.polygon_model_path:
            self.create_project()
        if self.polygon_model_path:
            return save_dict_as_json(data=data, path=self.project_path,
                                     filename=self.polygon_model_path)
        else:
            return ''

    def save_file(self, data: dict):
        if not self.project_path:
            self.create_file()
        save_dict_as_json(data=data, filename=self.project_path)

    def open_file(self, file_extension='json'):
        message = f'{file_extension} Files (*.{file_extension})'
        self.project_path, _ = QFileDialog.getOpenFileName(None, '', getcwd(), message)
        return self.project_path

    def create_file(self, message=None, extension: str = '', filename: str = '') -> Optional[str]:
        if not message:
            message = self.create_file_default
        filename, ok = QInputDialog.getText(None, 'Input Dialog', str(message)) \
                           if not filename else (filename, True)

        if ok and filename and filename != '':
            path = QFileDialog.getExistingDirectory(None, getcwd())
            if filename.__contains__('.') or extension is None:
                return f'{path}/{filename}'
            else:
                return f'{path}/{filename}{"." + extension.replace(".", "")}'

        return None

    def open_project(self):
        self.project_path = QFileDialog.getExistingDirectory(None, '', getcwd())
        if self.project_path:
            return self.project_path

    def create_project(self) -> Optional[str]:
        name, ok = QInputDialog.getText(None, 'Input Dialog', str(FileEdit.create_project_default))
        if not ok or name == '':
            return

        project_name = f'/{name.replace(" ", "_")}.oilcase'
        self.project_path = QFileDialog.getExistingDirectory(None, getcwd()) + project_name

        try:
            os.mkdir(self.project_path)
            save_dict_as_json({}, self.project_path, 'data.model')
            return self.project_path
        except FileExistsError as e:
            msg = QMessageBox()
            msg.setWindowTitle("Project create error")
            msg.setText(str(e))
            msg.exec_()