using System;
using System.Drawing;
using System.Windows.Forms;
using DevExpress.XtraEditors;

namespace Lskj.Control
{
    /// <summary>
    /// 带标题的时间输入控件，使用上下按钮调整时间。
    /// </summary>
    public class LabelTimeEdit : BaseUserControl
    {
        private readonly Panel plLeft;
        private readonly Panel plRight;
        private readonly Label lblText;
        private readonly TimeEdit txtEdit;
        private string formatString = "HH:mm:ss";

        public LabelTimeEdit()
        {
            plLeft = new Panel();
            plRight = new Panel();
            lblText = new Label();
            txtEdit = new TimeEdit();

            SuspendLayout();
            plLeft.SuspendLayout();
            plRight.SuspendLayout();
            ((System.ComponentModel.ISupportInitialize)txtEdit.Properties).BeginInit();

            plLeft.BackColor = Color.Transparent;
            plLeft.Controls.Add(lblText);
            plLeft.Dock = DockStyle.Left;
            plLeft.Size = new Size(40, 21);

            lblText.AutoSize = true;
            lblText.Location = new Point(5, 4);
            lblText.Text = "名称";

            plRight.Controls.Add(txtEdit);
            plRight.Dock = DockStyle.Fill;
            plRight.Location = new Point(40, 0);

            txtEdit.Dock = DockStyle.Fill;
            txtEdit.EditValue = null;
            txtEdit.Properties.Buttons.Clear();
            txtEdit.Properties.Buttons.Add(new DevExpress.XtraEditors.Controls.EditorButton(
                DevExpress.XtraEditors.Controls.ButtonPredefines.Combo));
            txtEdit.Properties.TimeEditStyle = DevExpress.XtraEditors.Repository.TimeEditStyle.SpinButtons;

            AutoScaleMode = AutoScaleMode.None;
            BackColor = Color.Transparent;
            Controls.Add(plRight);
            Controls.Add(plLeft);
            Size = new Size(162, 21);

            ((System.ComponentModel.ISupportInitialize)txtEdit.Properties).EndInit();
            plRight.ResumeLayout(false);
            plLeft.ResumeLayout(false);
            plLeft.PerformLayout();
            ResumeLayout(false);
        }

        /// <summary>
        /// 时间编辑器。
        /// </summary>
        public TimeEdit TextEdit
        {
            get { return txtEdit; }
        }

        public override string LabelText
        {
            get { return lblText.Text; }
            set
            {
                lblText.Text = value;
                if (FontSize > 0)
                {
                    plLeft.AutoSize = false;
                    lblText.AutoSize = false;
                    lblText.Dock = DockStyle.Fill;
                    lblText.Location = new Point(0, 0);
                    lblText.TextAlign = ContentAlignment.MiddleLeft;
                    txtEdit.Properties.AutoHeight = false;
                    plLeft.Width = value.Length * GetCharWidth();
                    GetCharWidthMultilingual(lblText, lblText.Text, plLeft);
                }
                else
                {
                    plLeft.Width = lblText.Width + PaddingLeft;
                }
            }
        }

        public override float FontSize
        {
            get { return base.FontSize; }
            set
            {
                base.FontSize = value;
                if (value > 0)
                {
                    lblText.Font = new Font(lblText.Font.FontFamily, value);
                    txtEdit.Font = new Font(txtEdit.Font.FontFamily, value);
                }
            }
        }

        public override string EditText
        {
            get { return txtEdit.EditValue == null ? string.Empty : txtEdit.Text; }
            set
            {
                TimeSpan timeValue;
                txtEdit.EditValue = TryGetTime(value, out timeValue)
                    ? (object)DateTime.Today.Add(timeValue)
                    : null;
            }
        }

        public override string NullText
        {
            get { return txtEdit.Properties.NullValuePrompt; }
            set
            {
                if (!string.IsNullOrEmpty(value))
                {
                    txtEdit.Properties.NullValuePromptShowForEmptyValue = true;
                    txtEdit.Properties.NullValuePrompt = value;
                }
                base.NullText = value;
            }
        }

        public override bool ReadOnly
        {
            get { return base.ReadOnly; }
            set
            {
                base.ReadOnly = value;
                txtEdit.Properties.ReadOnly = value;
                txtEdit.Enabled = !value;
                lblText.ForeColor = value ? ReadOnlyLabelForceColor : Required ? RequiredLabelForceColor : DefaultLabelForceColor;
            }
        }

        public override bool Required
        {
            get { return base.Required; }
            set
            {
                base.Required = value;
                if (value)
                {
                    lblText.ForeColor = RequiredLabelForceColor;
                }
            }
        }

        public override Color BackgroundColor
        {
            get { return txtEdit.Properties.Appearance.BackColor; }
            set { txtEdit.Properties.Appearance.BackColor = value; }
        }

        public override Color ForeColor
        {
            get { return txtEdit.Properties.Appearance.ForeColor; }
            set { txtEdit.Properties.Appearance.ForeColor = value; }
        }

        public override bool ContentBold
        {
            get { return txtEdit.Properties.Appearance.Font.Bold; }
            set
            {
                Font oldFont = txtEdit.Properties.Appearance.Font;
                txtEdit.Properties.Appearance.Font = new Font(oldFont.FontFamily, oldFont.Size, value ? FontStyle.Bold : FontStyle.Regular);
            }
        }

        /// <summary>
        /// 设置时间的显示和输入格式。
        /// </summary>
        public void TimeFormat(string value)
        {
            if (string.IsNullOrWhiteSpace(value))
            {
                return;
            }

            formatString = value;
            txtEdit.Properties.DisplayFormat.FormatString = value;
            txtEdit.Properties.EditFormat.FormatString = value;
            txtEdit.Properties.DisplayFormat.FormatType = DevExpress.Utils.FormatType.Custom;
            txtEdit.Properties.EditFormat.FormatType = DevExpress.Utils.FormatType.Custom;
            txtEdit.Properties.Mask.EditMask = value;
            txtEdit.Properties.Mask.UseMaskAsDisplayFormat = true;
            txtEdit.Properties.TimeFormat = value.IndexOf("ss", StringComparison.OrdinalIgnoreCase) >= 0
                ? DevExpress.XtraEditors.Controls.TimeFormat.HourMinSec
                : DevExpress.XtraEditors.Controls.TimeFormat.HourMin;
        }

        /// <summary>
        /// 按控件显示精度比较当前值和原值，避免 DateTime/TimeSpan 字符串格式差异造成误判。
        /// </summary>
        public bool IsSameTime(string value)
        {
            TimeSpan oldTime;
            TimeSpan currentTime;
            bool hasOldTime = TryGetTime(value, out oldTime);
            bool hasCurrentTime = TryGetTime(EditText, out currentTime);
            if (!hasOldTime || !hasCurrentTime)
            {
                return !hasOldTime && !hasCurrentTime;
            }

            if (formatString.IndexOf("ss", StringComparison.OrdinalIgnoreCase) >= 0)
            {
                return oldTime.Hours == currentTime.Hours &&
                       oldTime.Minutes == currentTime.Minutes &&
                       oldTime.Seconds == currentTime.Seconds;
            }

            return oldTime.Hours == currentTime.Hours && oldTime.Minutes == currentTime.Minutes;
        }

        private static bool TryGetTime(string value, out TimeSpan timeValue)
        {
            timeValue = TimeSpan.Zero;
            if (string.IsNullOrWhiteSpace(value))
            {
                return false;
            }

            if (TimeSpan.TryParse(value, out timeValue))
            {
                return true;
            }

            DateTime dateValue;
            if (DateTime.TryParse(value, out dateValue))
            {
                timeValue = dateValue.TimeOfDay;
                return true;
            }

            return false;
        }
    }
}