// Copyright (C) 2017 Kazuhiro Fujieda <fujieda@users.osdn.me>
// 
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

using System;
using System.Drawing;
using System.Linq;
using System.Windows.Forms;
using KancolleSniffer.Model;
using static System.Math;
// ReSharper disable CoVariantArrayConversion

namespace KancolleSniffer.View
{
    public class RepairListForMain : Panel
    {
        private const int PanelPadding = 5;
        private const int LineHeight = 15;
        private RepairListLabels[] _repairLabels;
        private ShipStatus[] _repairList = new ShipStatus[0];
        private ListScroller _listScroller;

        private class RepairListLabels
        {
            public ShipLabel Fleet { get; set; }
            public ShipLabel Name { get; set; }
            public ShipLabel Time { get; set; }
            public ShipLabel Damage { get; set; }
            public ShipLabel BackGround { private get; set; }

            public ShipLabel[] Labels => new[] {Fleet, Damage, Time, Name, BackGround};
        }

        public void CreateLabels(EventHandler onClick)
        {
            _repairLabels = new RepairListLabels[Lines];
            SuspendLayout();
            for (var i = 0; i < _repairLabels.Length; i++)
            {
                var y = PanelPadding + 1 + i * LineHeight;
                const int height = 12;
                _repairLabels[i] = new RepairListLabels
                {
                    Fleet = new ShipLabel {Location = new Point(0, y), Size = new Size(11, height)},
                    Damage = new ShipLabel {Location = new Point(119, y), Size = new Size(5, height - 1)},
                    Time = new ShipLabel {Location = new Point(75, y), AutoSize = true},
                    Name = new ShipLabel {Location = new Point(9, y), AutoSize = true},
                    BackGround = new ShipLabel
                    {
                        Location = new Point(0, y - 1),
                        Size = new Size(Width, height + 2)
                    }
                };
                Controls.AddRange(_repairLabels[i].Labels);
                foreach (var label in _repairLabels[i].Labels)
                {
                    label.Scale();
                    label.PresetColor = label.BackColor = ShipLabel.ColumnColors[(i + 1) % 2];
                    label.Click += onClick;
                }
            }
            ResumeLayout();
            SetupListScroller();
        }

        private int Lines
        {
            get
            {
                var baseHeight = (Parent.ClientRectangle.Height - Location.Y) / ShipLabel.ScaleFactor.Height;
                return (int)Round((baseHeight - PanelPadding * 2) / LineHeight);
            }
        }

        private void SetupListScroller()
        {
            _listScroller = new ListScroller(this, _repairLabels[0].Labels, _repairLabels.Last().Labels)
            {
                Lines = _repairLabels.Length,
                Padding = PanelPadding
            };
            _listScroller.Update += ShowRepairList;
        }

        public void SetRepairList(ShipStatus[] list)
        {
            _repairList = list;
            _listScroller.DataCount = list.Length;
            SetPanelHeight();
            if (list.Length == 0)
            {
                SetPanelHeight();
                ClearLabels(0);
                ClearLabels(1);
                _repairLabels[0].Name.SetName("なし");
                return;
            }
            _listScroller.Position = Min(_listScroller.Position, Max(0, _repairList.Length - _repairLabels.Length));
            ShowRepairList();
        }

        private void SetPanelHeight()
        {
            var lines = Min(Max(1, _repairList.Length), _repairLabels.Length);
            Size = new Size(Width,
                (int)Round(ShipLabel.ScaleFactor.Height * lines * LineHeight + PanelPadding * 2));
        }

        private void ShowRepairList()
        {
            for (var i = 0; i < Min(_repairList.Length, _repairLabels.Length); i++)
            {
                var s = _repairList[i + _listScroller.Position];
                var labels = _repairLabels[i];
                labels.Fleet.SetFleet(s);
                labels.Name.SetName(s, ShipNameWidth.RepairList);
                labels.Time.SetRepairTime(s);
                labels.Damage.BackColor = ShipLabel.DamageColor(s, labels.Damage.PresetColor);
            }
            if (_repairList.Length < _repairLabels.Length)
                ClearLabels(_repairList.Length);
            _listScroller.DrawMark();
        }

        private void ClearLabels(int i)
        {
            var labels = _repairLabels[i];
            labels.Fleet.Text = "";
            labels.Name.SetName("");
            labels.Time.Text = "";
            labels.Damage.BackColor = labels.Damage.PresetColor;
        }
    }
}