/*
 * MIT License
 * 
 * Copyright (c) 2017 Michael VanOverbeek and ShiftOS devs
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using ShiftOS.Engine;

namespace ShiftOS.WinForms.Applications
{
    [Launcher("{TITLE_CALCULATOR}", true, "al_calculator", "{AL_ACCESSORIES}")]
    [RequiresUpgrade("calculator")]
    [WinOpen("{WO_CALCULATOR}")]
    [DefaultIcon("iconCalculator")]
    [DefaultTitle("{TITLE_CALCULATOR}")]
    public partial class Calculator : UserControl, IShiftOSWindow
    {
        public bool justopened = false;
        private int activeoperation = 0;
        private float operationnumber = 0;
        private float currentnumber = 0;
        private bool multiop = false;

        public Calculator()
        {
            InitializeComponent();
        }

        private void prepareButtons()
        {
            buttonEquals.Visible = ShiftoriumFrontend.UpgradeInstalled("calc_equals_button");
            buttonPlus.Visible = ShiftoriumFrontend.UpgradeInstalled("calc_plus_button");
            buttonMinus.Visible = ShiftoriumFrontend.UpgradeInstalled("calc_minus_button");
            buttonMultiply.Visible = ShiftoriumFrontend.UpgradeInstalled("calc_multiply_button");
            buttonDivide.Visible = ShiftoriumFrontend.UpgradeInstalled("calc_divide_button");
            buttonC.Visible = ShiftoriumFrontend.UpgradeInstalled("calc_clear_button");
            buttonCE.Visible = ShiftoriumFrontend.UpgradeInstalled("calc_ce_button");
            buttonDecimal.Visible = ShiftoriumFrontend.UpgradeInstalled("calc_decimal_button");
        }

        public void OnLoad()
        {
            prepareButtons();
        }

        public void OnSkinLoad() { }

        public bool OnUnload()
        {
            return true;
        }

        public void OnUpgrade()
        {
            prepareButtons();
        }

        private void numBox_TextChanged(object sender, EventArgs e)
        {
            if (numBox.Text.EndsWith("."))
            {
                if (numBox.Text == ".") { currentnumber = 0; }
                else { currentnumber = float.Parse(numBox.Text.Replace(".", "")); }
            }
            else if (numBox.Text == "") { currentnumber = 0; }
            else { currentnumber = float.Parse(numBox.Text); }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (multiop) { numBox.Text = "1"; multiop = false; }
            else { numBox.Text = numBox.Text + "1"; }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            if (multiop) { numBox.Text = "2"; multiop = false; }
            else { numBox.Text = numBox.Text + "2"; }
        }

        private void button3_Click(object sender, EventArgs e)
        {
            if (multiop) { numBox.Text = "3"; multiop = false; }
            else { numBox.Text = numBox.Text + "3"; }
        }

        private void button4_Click(object sender, EventArgs e)
        {
            if (multiop) { numBox.Text = "4"; multiop = false; }
            else { numBox.Text = numBox.Text + "4"; }
        }

        private void button5_Click(object sender, EventArgs e)
        {
            if (multiop) { numBox.Text = "5"; multiop = false; }
            else { numBox.Text = numBox.Text + "5"; }
        }

        private void button6_Click(object sender, EventArgs e)
        {
            if (multiop) { numBox.Text = "6"; multiop = false; }
            else { numBox.Text = numBox.Text + "6"; }
        }

        private void button7_Click(object sender, EventArgs e)
        {
            if (multiop) { numBox.Text = "7"; multiop = false; }
            else { numBox.Text = numBox.Text + "7"; }
        }

        private void button8_Click(object sender, EventArgs e)
        {
            if (multiop) { numBox.Text = "8"; multiop = false; }
            else { numBox.Text = numBox.Text + "8"; }
        }

        private void button9_Click(object sender, EventArgs e)
        {
            if (multiop) { numBox.Text = "9"; multiop = false; }
            else { numBox.Text = numBox.Text + "9"; }
        }

        private void button10_Click(object sender, EventArgs e)
        {
            if (multiop) { numBox.Text = "0"; multiop = false; }
            else { numBox.Text = numBox.Text + "0"; }
        }

        private void buttonPlus_Click(object sender, EventArgs e)
        {
            if (operationnumber == 0 && activeoperation == 0)
            {
                operationnumber = currentnumber;
                activeoperation = 1;
            } else
            {
                solve();
                operationnumber = currentnumber;
                activeoperation = 1;
            }
            multiop = true;
        }

        private void solve()
        {
            switch (activeoperation)
            {
                case 1:
                    numBox.Text = (currentnumber + operationnumber).ToString();
                    break;

                case 2:
                    numBox.Text = (operationnumber - currentnumber).ToString();
                    break;

                case 3:
                    numBox.Text = (operationnumber * currentnumber).ToString();
                    break;

                case 4:
                    numBox.Text = (operationnumber / currentnumber).ToString();
                    break;

                default:
                    break;
            }
        }

        private void buttonEquals_Click(object sender, EventArgs e)
        {
            solve();
            operationnumber = 0;
            activeoperation = 0;
        }

        private void buttonMinus_Click(object sender, EventArgs e)
        {
            if (operationnumber == 0 && activeoperation == 0)
            {
                operationnumber = currentnumber;
                activeoperation = 2;
            }
            else
            {
                solve();
                operationnumber = currentnumber;
                activeoperation = 2;
            }
            multiop = true;
        }

        private void buttonMultiply_Click(object sender, EventArgs e)
        {
            if (operationnumber == 0 && activeoperation == 0)
            {
                operationnumber = currentnumber;
                activeoperation = 3;
            }
            else
            {
                solve();
                operationnumber = currentnumber;
                activeoperation = 3;
            }
            multiop = true;
        }

        private void buttonDivide_Click(object sender, EventArgs e)
        {
            if (operationnumber == 0 && activeoperation == 0)
            {
                operationnumber = currentnumber;
                activeoperation = 4;
            }
            else
            {
                solve();
                operationnumber = currentnumber;
                activeoperation = 4;
            }
            multiop = true;
        }

        private void buttonC_Click(object sender, EventArgs e)
        {
            numBox.Clear();
        }

        private void buttonCE_Click(object sender, EventArgs e)
        {
            numBox.Clear();
            operationnumber = 0;
            activeoperation = 0;
            multiop = false;
        }

        private void buttonDecimal_Click(object sender, EventArgs e)
        {
            if (multiop) { numBox.Text = "."; multiop = false; }
            else if (!numBox.Text.Contains(".")) numBox.Text = numBox.Text + ".";
        }
    }
}