using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;

namespace GroupBuyParser
{
    public partial class MainForm : Form
    {
        public MainForm()
        {
            InitializeComponent();
        }

        private void btnPathBrowser_Click(object sender, EventArgs e)
        {
            if (dlgOpen.ShowDialog() == DialogResult.OK)
            {
                txtPath.Text = dlgOpen.FileName;
                rdoPath.Checked = true;
            }
        }

        private void btnType1_Click(object sender, EventArgs e)
        {
            txtName.Text = "A";
            txtLocation.Text = "蘆洲,三重";

            btnProcess.PerformClick();
        }

        private void btnType2_Click(object sender, EventArgs e)
        {
            txtName.Text = "A,B,C,D,E,F,G,H,I,J";
            txtLocation.Text = "蘆洲,三重";

            btnProcess.PerformClick();
        }

        private void btnType3_Click(object sender, EventArgs e)
        {
            txtName.Text = "A:M:L:XL:2XL:3XL:4XL,B:M:L:XL:2XL:3XL:4XL,C:M:L:XL:2XL:3XL:4XL,D:M:L:XL:2XL:3XL:4XL,E:M:L:XL:2XL:3XL:4XL,F:M:L:XL:2XL:3XL:4XL";
            txtLocation.Text = "蘆洲,三重";

            btnProcess.PerformClick();
        }

        private void ParseProcess(ParserSettings settings)
        {
            if (rdoPath.Checked && string.IsNullOrEmpty(txtPath.Text))
            {
                MessageBox.Show("Please select text file first", "Error");
                return;
            }

            var parser = new GroupBuyParser
            {
                Settings = settings
            };

            var data = GetParserData();
            parser.Parse(data);

            var successData = data.Where(x => x.Success).Select(x => $"{x.Text} => {x.NormalizeText}");
            var errorData = data.Where(x => !x.Success).Select(x => $"{x.Text} ({x.ErrorMessage})");

            UpdateListBox(successData, errorData);
        }

        private void UpdateListBox(IEnumerable<string> successData, IEnumerable<string> errorData)
        {
            lstSuccess.BeginUpdate();
            lstSuccess.Items.Clear();
            lstSuccess.Items.AddRange(successData.ToArray());
            lstSuccess.EndUpdate();

            lstError.BeginUpdate();
            lstError.Items.Clear();
            lstError.Items.AddRange(errorData.ToArray());
            lstError.EndUpdate();

            lblListCount.Text = $"成功 {lstSuccess.Items.Count} 筆，失敗 {lstError.Items.Count} 筆";
        }

        private List<ParserData> GetParserData()
        {
            if (rdoPath.Checked)
            {
                IEnumerable<string> comments;

                var fileContent = System.IO.File.ReadAllText(txtPath.Text);
                if (fileContent.StartsWith("["))
                {
                    comments = JsonConvert.DeserializeObject<List<string>>(fileContent);
                }
                else
                {
                    comments = GroupBuyParser.Arrange(fileContent);
                }
                var data = comments.Select(x => new ParserData { Text = x });

                return data.ToList();
            }
            else
            {
                return new List<ParserData> { new ParserData { Text = txtInput.Text } };
            }
        }

        private void btnProcess_Click(object sender, EventArgs e)
        {
            var settings = new ParserSettings
            {
                Products = txtName.Text.Split(',').Select(x => {
                    // 如果項目有多筆，後面的當作規格輸入
                    // Ex. "A" => 無規格  "B:M:L:XL" => M/L/XL
                    var s = x.Split(':').ToList();
                    var name = s[0];
                    s.RemoveAt(0);
                    var specs = s.Count >= 1 ? s.ToArray() : null;

                    return new ProductInfo
                    {
                        Name = name,
                        Specifications = specs
                    };
                }).ToList(),
                Branches = GetSplitStrings(txtLocation)
            };

            ParseProcess(settings);
        }

        private List<string> GetSplitStrings(TextBox textBox)
        {
            return textBox.Text.Trim().Split(',', StringSplitOptions.RemoveEmptyEntries).ToList();
        }

        private void txtInput_KeyDown(object sender, KeyEventArgs e)
        {
            rdoInput.Checked = true;
        }
    }
}