using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Data.SQLite;

namespace CNAS_Authorize
{
    public class Machine
    {
        public string FactoryName { get; set; }
        public string MachineCode { get; set; }
        public string ImportTime { get; set; }
        public bool IsGenerated { get; set; }

        public Machine(string name, string code, string time, bool isGen)
        {
            FactoryName = name;
            MachineCode = code;
            ImportTime = time;
            IsGenerated = isGen;
        }

    }

    class MachineAuth
    {
        /// <summary>
        /// 所有数据行
        /// </summary>
        private List<Machine> m_machines;
        /// <summary>
        /// 编码过滤
        /// </summary>
        private string m_filter_code;
        /// <summary>
        /// 名称过滤
        /// </summary>
        private string m_filter_factory;
        //以下都是过滤过的数据
        /// <summary>
        /// 过滤过的数据
        /// </summary>
        private List<Machine> m_rangle;
        /// <summary>
        /// 过滤过的当前页
        /// </summary>
        private List<Machine> m_page;
        /// <summary>
        /// 每页数量
        /// </summary>
        private int m_pageSize;
        /// <summary>
        /// 页号
        /// </summary>
        private int m_pageIndex;
        /// <summary>
        /// 总页数
        /// </summary>
        private int m_pageCount;


        public MachineAuth()
        {
            m_pageSize = 10;
            m_pageIndex = 1;
        }
        public void Load()
        {
            InitializeDatabase();
            
            m_machines = new List<Machine>();
            
            string dbPath = System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "CNAS.db");
            string connectionString = $"Data Source={dbPath};Version=3;";
            
            try
            {
                using (var connection = new SQLiteConnection(connectionString))
                {
                    connection.Open();
                    using (var command = new SQLiteCommand(connection))
                    {
                        command.CommandText = "SELECT PLANTCODE, MAC_ADDRESS, CREATETIME FROM macaddress";
                        using (var reader = command.ExecuteReader())
                        {
                            while (reader.Read())
                            {
                                Machine m = new Machine(
                                    reader["PLANTCODE"].ToString(),
                                    reader["MAC_ADDRESS"].ToString(),
                                    reader["CREATETIME"].ToString(),
                                    true
                                );
                                m_machines.Add(m);
                            }
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show($"加载数据失败: {ex.Message}", "错误");
            }

            m_rangle = new List<Machine>();
            m_rangle.AddRange(m_machines);

            m_pageSize = 10;
            m_pageIndex = 1;
            m_pageCount = (m_rangle.Count / m_pageSize) + (m_rangle.Count % m_pageSize == 0 ? 0 : 1);

            m_page = getPageData(m_pageIndex);
        }

        public int PageSize
        {
            get { return m_pageSize; }
            set
            {
                m_pageSize = value;
                updateView();
            }
        }

        public string CurrentPage
        {
            get
            {
                return m_pageCount == 0 ? "" : string.Format("{0} / {1}", m_pageIndex, m_pageCount);
            }
            set
            {

            }
        }

        public int TotalCount
        {
            get
            {
                return m_machines == null ? 0 : m_machines.Count;
            }
            set
            {

            }
        }

        private void updateView()
        {
            List<Machine> view = new List<Machine>();
            if (!string.IsNullOrEmpty(m_filter_code) || !string.IsNullOrEmpty(m_filter_factory))
            {
                foreach (Machine item in m_machines)
                {
                    bool flag = true;
                    if (!string.IsNullOrEmpty(m_filter_code))
                    {
                        if (item.MachineCode.IndexOf(m_filter_code) == -1)
                        {
                            flag = false;
                        }
                    }
                    if (!string.IsNullOrEmpty(m_filter_factory))
                    {
                        if (item.FactoryName.IndexOf(m_filter_factory) == -1)
                        {
                            flag = false;
                        }
                    }
                    if (flag)
                    {
                        view.Add(item);
                    }
                }
            }
            else
            {
                view.AddRange(m_machines);
            }
            m_rangle = view;
            m_pageIndex = 1;
            m_pageCount = (m_rangle.Count / m_pageSize) + (m_rangle.Count % m_pageSize == 0 ? 0 : 1);
            m_page = getPageData(m_pageIndex);
        }

        public void ChangeFilter(string code, string factory)
        {
            this.m_filter_code = code;
            this.m_filter_factory = factory;

            updateView();
        }

        public List<Machine> Page
        {
            get
            {
                return m_page;
            }
        }

        private List<Machine> getPageData(int pageIndex)
        {
            int index = (pageIndex - 1) * m_pageSize;
            List<Machine> page = new List<Machine>(m_pageSize);
            for (int i = 0; i < m_pageSize && index < m_rangle.Count; i++)
            {
                page.Add(m_rangle[index]);
                index++;
            }
            return page;
        }

        public List<Machine> NextPage(out bool ok)
        {
            int index = m_pageIndex * m_pageSize;
            if (m_rangle == null || index >= m_rangle.Count)
            {
                ok = false;
                return null;
            }

            m_pageIndex++;
            m_page = getPageData(m_pageIndex);

            ok = true;
            return m_page;
        }

        public List<Machine> PrevPage(out bool ok)
        {
            if (m_pageIndex == 1 || m_rangle == null)
            {
                ok = false;
                return null;
            }
            m_pageIndex--;

            m_page = getPageData(m_pageIndex);

            ok = true;
            return m_page;

        }

        private void InitializeDatabase()
        {
            try
            {
                string dbPath = System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "CNAS.db");
                string connectionString = $"Data Source={dbPath};Version=3;";
                
                // 确保数据库目录存在
                string dbDirectory = System.IO.Path.GetDirectoryName(dbPath);
                if (!System.IO.Directory.Exists(dbDirectory))
                {
                    System.IO.Directory.CreateDirectory(dbDirectory);
                }

                using (var connection = new SQLiteConnection(connectionString))
                {
                    connection.Open();
                    using (var command = new SQLiteCommand(connection))
                    {
                        command.CommandText = @"
                            CREATE TABLE IF NOT EXISTS macaddress (
                                id INTEGER PRIMARY KEY AUTOINCREMENT,
                                MAC_ADDRESS TEXT,
                                PLANTCODE TEXT,
                                CREATETIME TEXT,
                                FACILITY_STYLE TEXT
                            );";
                        command.ExecuteNonQuery();
                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show($"初始化数据库失败: {ex.Message}", "错误");
            }
        }

        private void InsertTestData()
        {
            string connectionString = "Data Source=|DataDirectory|\\CNAS.db;Version=3;";
            using (var connection = new SQLiteConnection(connectionString))
            {
                connection.Open();
                using (var command = new SQLiteCommand(connection))
                {
                    command.CommandText = @"
                        INSERT INTO macaddress (MAC_ADDRESS, PLANTCODE, CREATETIME, FACILITY_STYLE)
                        VALUES (@mac, @plant, @time, @style)";
                    
                    command.Parameters.AddWithValue("@mac", "00:11:22:33:44:55");
                    command.Parameters.AddWithValue("@plant", "PLANT001");
                    command.Parameters.AddWithValue("@time", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));
                    command.Parameters.AddWithValue("@style", "Style A");
                    
                    command.ExecuteNonQuery();
                }
            }
        }

    }
}