using System;
using System.Windows.Forms;
using DevExpress.XtraEditors;
using LFP_Manager.DataStructure;
using LFP_Manager.Function;

namespace LFP_Manager.Forms
{
    public partial class FmxChangePassword : XtraForm
    {
        private CommConfig Config;

        public FmxChangePassword(CommConfig aConfig)
        {
            InitializeComponent();
            Config = aConfig;

            cbPasswordType.Properties.Items.Clear();
            cbPasswordType.Properties.Items.Add("Anti-Theft Enable Password");
            cbPasswordType.Properties.Items.Add("Anti-Theft Disable Password");
            cbPasswordType.SelectedIndex = 0;
        }

        private void CbPasswordType_SelectedIndexChanged(object sender, EventArgs e)
        {
            teCurrentPassword.Text = string.Empty;
            teNewPassword.Text = string.Empty;
            teConfirmPassword.Text = string.Empty;
            teCurrentPassword.Focus();
        }

        private void CeShowPassword_CheckedChanged(object sender, EventArgs e)
        {
            char pChar = ceShowPassword.Checked ? '\0' : '*';
            teCurrentPassword.Properties.PasswordChar = pChar;
            teNewPassword.Properties.PasswordChar = pChar;
            teConfirmPassword.Properties.PasswordChar = pChar;
        }

        private void BtnCancel_Click(object sender, EventArgs e)
        {
            this.DialogResult = DialogResult.Cancel;
            this.Close();
        }

        private void BtnOk_Click(object sender, EventArgs e)
        {
            string currentInput = teCurrentPassword.Text;
            string newInput = teNewPassword.Text;
            string confirmInput = teConfirmPassword.Text;

            bool isEnablePw = (cbPasswordType.SelectedIndex == 0);
            string actualCurrentPw = isEnablePw ? Config.EnablePassword : Config.DisablePassword;

            // 1. 현재 비밀번호 확인
            if (currentInput != actualCurrentPw)
            {
                MessageBox.Show("Current password is incorrect.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                teCurrentPassword.Focus();
                teCurrentPassword.SelectAll();
                return;
            }

            // 2. 새 비밀번호 공백 확인
            if (string.IsNullOrWhiteSpace(newInput))
            {
                MessageBox.Show("New password cannot be empty.", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                teNewPassword.Focus();
                return;
            }

            // 3. 새 비밀번호와 현재 비밀번호 동일 여부 확인
            if (newInput == actualCurrentPw)
            {
                MessageBox.Show("New password cannot be the same as current password.", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                teNewPassword.Focus();
                teNewPassword.SelectAll();
                return;
            }

            // 4. 새 비밀번호 일치 확인
            if (newInput != confirmInput)
            {
                MessageBox.Show("New password and confirm password do not match.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
                teConfirmPassword.Focus();
                teConfirmPassword.SelectAll();
                return;
            }

            // 5. 비밀번호 업데이트 및 ini 파일 저장 (자동 암호화)
            if (isEnablePw)
            {
                Config.EnablePassword = newInput;
            }
            else
            {
                Config.DisablePassword = newInput;
            }

            try
            {
                csIniControlFunction.IniSave(Application.ExecutablePath, Config);
                string pwTypeName = isEnablePw ? "Anti-Theft Enable Password" : "Anti-Theft Disable Password";
                MessageBox.Show(string.Format("{0} has been changed successfully.", pwTypeName), "Success", MessageBoxButtons.OK, MessageBoxIcon.Information);
                this.DialogResult = DialogResult.OK;
                this.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(string.Format("Failed to save password: {0}", ex.Message), "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
    }
}