using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace N3
{
    /// <summary>
    /// Логика взаимодействия для MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        private List<float> numbs = new List<float>();
        private float thisNum = 0;
        private float answer = 0;
        private bool operationsFlag = true;
        private string lastOperation = "";
        private string NullException = "ошибка деления на 0";
        private string stringShow = "";
        private bool placeFlag = true;//флаг записи дробного числа
        private int placeNum = 0;//разряд числа после запятой 

        public MainWindow()
        {
            InitializeComponent();
        }
        /// <summary>
        /// Запись чисел
        /// </summary>
        private void NumClick(object sender, RoutedEventArgs e)
        {
            Button btn = (Button)sender;
            int num = Convert.ToInt32(btn.Content);
            if (placeNum == 0)
            {
                thisNum = thisNum * 10 + num;
            }
            else
            {
                float place = (float)Math.Pow(0.10, placeNum);
                placeNum++;
                thisNum = thisNum + num * place;
            }
            stringShow += num;
            TBshow.Text = stringShow;
        }
        /// <summary>
        /// Выполнение деятельности, по типу удаления и очищения элементов
        /// </summary>
        private void ActClick(object sender, RoutedEventArgs e)
        {
            Button btn = (Button)sender;
            string act = (string)btn.Content;
            switch (act)
            {
                case "C": //очищение всего
                    {
                        stringShow = "";
                        thisNum = 0;
                        answer = 0;
                        numbs = new List<float>();
                        operationsFlag = true;
                        lastOperation = "";
                        placeFlag = true;
                        placeNum = 0;
                        TBshow.Text = stringShow;
                        TBanswer.Text = "";
                        TBanswer.Visibility = Visibility.Collapsed;
                        break;
                    }
                case ","://число с запятой
                    {
                        if (placeFlag)
                        {
                            placeFlag = false;
                            placeNum = 1;
                            stringShow += ",";
                            TBshow.Text = stringShow;
                        }
                        break;
                    }
                case "="://решение уравнения
                    {
                        if (lastOperation != "")
                        {
                            otherOperation("=");
                        }
                        else if (operationsFlag)
                        {
                            answer += thisNum;
                        }
                        TBanswer.Text = "= " + answer;
                        TBanswer.Visibility = Visibility.Visible;
                        break;
                    }
            }
        }
        private void newNum()
        {
            numbs.Add(thisNum);
            thisNum = 0;
            placeFlag = true;
            placeNum = 0;
        }
        /// <summary>
        /// Операции над элементами
        /// </summary>
        private void OperationClick(object sender, RoutedEventArgs e)
        {
            Button btn = (Button)sender;
            string operation = (string)btn.Content;
            if (operationsFlag)
            {
                answer += thisNum;
                operationsFlag = false;
                lastOperation = "";
            }

            switch (operation)
            {
                case "√x":
                    {
                        if (!operationsFlag)
                        {
                            answer = OperationClass.extract(answer);
                            stringShow = "√(" + stringShow + ")";
                            TBshow.Text = stringShow;
                        }
                        operationsFlag = true;
                        newNum();
                        break;
                    }
                case "x^2":
                    {
                        if (!operationsFlag)
                        {
                            answer = OperationClass.power(answer);
                            stringShow = "(" + stringShow + ")^2";
                            TBshow.Text = stringShow;
                        }
                        operationsFlag = true;
                        newNum();
                        break;
                    }

                case "log10(x)":
                    {
                        if (!operationsFlag)
                        {
                            if (answer < 0)
                            {
                                TBanswer.Text = "Число не может быть отрицательным";
                            }
                            answer = OperationClass.logorifm(answer);
                            stringShow = "log10(" + stringShow + ")";
                            TBshow.Text = stringShow;
                            operationsFlag = true;

                        }

                        newNum();
                        break;
                    }
                case "sin":
                    {
                        if (!operationsFlag)
                        {
                            answer = OperationClass.sinus(answer);
                            stringShow = "sin(" + stringShow + ")";
                            TBshow.Text = stringShow;
                        }
                        operationsFlag = true;
                        newNum();
                        break;
                    }
                case "ctg":
                    {
                        if (!operationsFlag)
                        {
                            answer = OperationClass.cotangent(answer);
                            stringShow = "ctg(" + stringShow + ")";
                            TBshow.Text = stringShow;
                        }
                        operationsFlag = true;
                        newNum();
                        break;
                    }
                default:
                    {
                        stringShow += operation;
                        TBshow.Text = stringShow;
                        newNum();
                        break;
                    }
            }

            if (lastOperation == "") lastOperation = operation;
            else otherOperation(operation);

        }
        private void otherOperation(string operation)
        {
            switch (lastOperation)
            {
                case "+":
                    {
                        if (!operationsFlag)
                        {
                            answer = OperationClass.sum(answer, thisNum);
                        }
                        newNum();
                        break;
                    }
                case "-":
                    {
                        if (!operationsFlag)
                        {
                            answer = OperationClass.difference(answer, thisNum);
                        }
                        newNum();
                        break;
                    }
                case "/":
                    {
                        if (!operationsFlag)
                        {
                            answer = OperationClass.quotient(answer, thisNum);
                        }
                        newNum();
                        break;
                    }
                case "*":
                    {
                        if (!operationsFlag)
                        {
                            answer = OperationClass.product(answer, thisNum);
                        }
                        newNum();
                        break;
                    }
                case "%":
                    {
                        if (!operationsFlag)
                        {
                            answer = OperationClass.procent(answer, thisNum);
                        }
                        newNum();
                        break;
                    }
            }
            if (operation != "=") lastOperation = operation;
        }
    }
}