using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace KssSmaPlaLib.Ini
{
    public static class IniHelper
    {
        public const string INI_PATH = @".\Settings.ini";

        public static List<IniDto> IniList = new List<IniDto>();

        // Win32 API宣言
        [DllImport("kernel32.dll", CharSet = CharSet.Unicode)]
        private static extern int GetPrivateProfileString(
            string lpAppName,
            string lpKeyName,
            string lpDefault,
            StringBuilder lpReturnedString,
            int nSize,
            string lpFileName);

        [DllImport("kernel32.dll", CharSet = CharSet.Unicode)]
        private static extern bool WritePrivateProfileString(
            string lpAppName,
            string lpKeyName,
            string lpString,
            string lpFileName);

        /// <summary>
        /// INIファイルから値を読み込み（セクション＋キー指定）
        /// </summary>
        public static string ReadValue(string iniPath, string section, string key, string defaultValue = "")
        {
            // もしINIリストにあったら、そこから返す
            var value = IniList
                .FirstOrDefault(m => m.Section == section && m.Key == key)
                ?.Value;
            if (value != null) return (string)value;

            if (string.IsNullOrEmpty(iniPath)) iniPath = INI_PATH;
            var sb = new StringBuilder(1024);
            GetPrivateProfileString(section, key, defaultValue, sb, sb.Capacity, iniPath);
            var str = sb.ToString();
            str = string.IsNullOrEmpty(str) ? defaultValue : str;
            return str;
        }

        /// <summary>
        /// bool値の読み込み
        /// </summary>
        /// <param name="iniPath"></param>
        /// <param name="section"></param>
        /// <param name="key"></param>
        /// <param name="defaultValue"></param>
        /// <returns></returns>
        public static bool ReadBoolValue(string iniPath, string section, string key, bool defaultValue = false)
        {
            var str = ReadValue(iniPath, section, key, defaultValue.ToString());
            var boolValue = bool.TryParse(str, out var b) ? b : defaultValue;
            return boolValue;
        }

        /// <summary>
        /// 日付値の読み込み
        /// </summary>
        public static DateTime ReadDateValue(string iniPath, string section, string key, DateTime? defaultDate = null)
        {
            var defDate = defaultDate ?? DateTime.MinValue;

            var str = ReadValue(iniPath, section, key, defDate.ToString("yyyy/MM/dd"));
            var dateValue = DateTime.TryParse(str, out var d) ? d : defDate;
            return dateValue;
        }

        /// <summary>
        /// INIファイルに値を書き込み（セクション＋キー＋値指定）
        /// </summary>
        public static bool WriteValue(string iniPath, string section, string key, string value)
        {
            if (string.IsNullOrEmpty(iniPath)) iniPath = INI_PATH;
            return WritePrivateProfileString(section, key, value, iniPath);
        }

        /// <summary>
        /// bool値の書き込み
        /// </summary>
        /// <param name="iniPath"></param>
        /// <param name="section"></param>
        /// <param name="key"></param>
        /// <param name="value"></param>
        /// <returns></returns>
        public static bool WriteBoolValue(string iniPath, string section, string key, bool value)
        {
            return WriteValue(iniPath, section, key, value.ToString());
        }

        /// <summary>
        /// 日付値の書き込み
        /// </summary>
        /// <param name="iniPath"></param>
        /// <param name="section"></param>
        /// <param name="key"></param>
        /// <param name="value"></param>
        /// <returns></returns>
        public static bool WriteDateValue(string iniPath, string section, string key, DateTime value)
        {
            return WriteValue(iniPath, section, key, value.ToString("yyyy/MM/dd"));
        }

        public static string OpenIni(string initialFolderPath = "")
        {
            using (var dlg = new OpenFileDialog())
            {
                dlg.Multiselect = false;
                dlg.Title = "Settings.ini ファイルを選択してください。";
                dlg.AddExtension = true;
                dlg.CheckFileExists = true;
                dlg.CheckPathExists = true;
                dlg.RestoreDirectory = true;
                dlg.Filter = "設定ファイル(*.ini)|*.ini";
                if (!string.IsNullOrEmpty(initialFolderPath))
                {
                    // 最初に見せるフォルダ（デスクトップなど）
                    dlg.InitialDirectory = initialFolderPath;
                }

                // ダイアログを表示して「OK」が押されたら処理
                if (dlg.ShowDialog() == DialogResult.Cancel) return string.Empty;

                // 選択されたファイルのパスを取得
                return dlg.FileName;
            }
        }

        public static object ReadValue(object value, string name, object iNI_KEY_ITAKUSAKI_MEI, string v)
        {
            throw new NotImplementedException();
        }
    }
}