using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApp1
{
    public partial class OwnAdd : Form
    {
        public OwnAdd()
        {
            InitializeComponent();
        }
        String dir = AppDomain.CurrentDomain.BaseDirectory;
        public List<string> readIds()
        {
            List<string> users = new List<string>();
            string path = string.Format("{0}\\user.txt",dir);
            using (StreamReader read = new StreamReader(path))
            {
                string line;
                while((line = read.ReadLine()) != null)
                {
                    string[] parts = line.Split(',');
                    string id = parts[0].Split('=')[1];
                    users.Add(id);
                }
                read.Close();
            }
            return users;
        }
        public List<string> readAccount()
        {
            List<string> users = new List<string>();
            string path = string.Format("{0}\\user.txt", dir);
            using (StreamReader read = new StreamReader(path))
            {
                string line;
                while ((line = read.ReadLine()) != null)
                {
                    string[] parts = line.Split(',');
                    string id = parts[1].Split('=')[1];
                    users.Add(id);
                }
                read.Close();
            }
            return users;
        }
        private void confirm_Click(object sender, EventArgs e)
        {
            List<string> ids = readIds();
            string path = string.Format("{0}\\user.txt",dir);
            int uid = int.Parse(this.textBox1.Text);
            foreach (string user in ids)
            {
                if(uid == int.Parse(user))
                {
                    MessageBox.Show("用户id不能重复!");
                    return;
                }
            }
            string uaccount = this.textBox2.Text;
            List<string> users = readAccount();
            foreach (string user in users)
            {
                if (uaccount == user)
                {
                    MessageBox.Show("用户账号不能重复!");
                    return;
                }
            }
            if (uaccount == null || uaccount == "")
            {
                MessageBox.Show("账号不能为空");
            }
            string upassword = this.textBox3.Text;
            if (upassword == null || upassword == "")
            {
                MessageBox.Show("密码不能为空");
            }
            string permissions = this.comboBox1.Text;
            if (permissions == null || permissions == "")
            {
                MessageBox.Show("身份不能为空");
            }
            int pid = int.Parse(this.textBox5.Text);
            if (pid.ToString() == null)
            {
                MessageBox.Show("用户id不能为空");
            }
            if (permissions.Equals("教师"))
            {
                using (StreamWriter write = File.AppendText(path))
                {
                    write.WriteLine($"uid={uid},uaccount={upassword},upassword={upassword},permissions={permissions},tid={pid}");
                    this.DialogResult = DialogResult.OK;
                    write.Close();
                }
                return;
            }
            if (permissions.Equals("学生"))
            {
                using (StreamWriter write = File.AppendText(path))
                {
                    write.WriteLine($"uid={uid},uaccount={upassword},upassword={upassword},permissions={permissions},sid={pid}");
                    this.DialogResult = DialogResult.OK;
                    write.Close();
                }
                return;
            }
        }
    }
}