// Copyright (C) 2016 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.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Windows.Forms;

namespace KancolleSniffer
{
    public class AntiAirPanel : Panel
    {
        private const int LineHeight = 16;
        private readonly List<ShipLabel[]> _labelList = new List<ShipLabel[]>();
        private readonly List<Panel> _panelList = new List<Panel>();
        private readonly List<Record> _table = new List<Record>();

        public void Update(Sniffer sniffer)
        {
            CreateTable(sniffer);
            SuspendLayout();
            CreateLabels();
            SetRecords();
            ResumeLayout();
        }

        private class Record
        {
            public string Fleet { get; set; }
            public string Ship { get; set; }
            public int Id { get; set; }
            public string Rate { get; set; }
            public string Diff { get; set; }

            public Record()
            {
                Fleet = Ship = Rate = Diff = "";
            }
        }

        private void CreateTable(Sniffer sniffer)
        {
            _table.Clear();
            var fn = new[] {"第一艦隊", "第二艦隊", "第三艦隊", "第四艦隊"};
            for (var f = 0; f < fn.Length; f++)
            {
                var ships = sniffer.GetShipStatuses(f);
                var rawForFleet = ships.Sum(ship => ship.EffectiveAntiAirForFleet);
                var forFleet = new[] {1.0, 1.2, 1.6}.Select(r => (int)(rawForFleet * r) * 2 / 1.3).ToArray();
                _table.Add(new Record {Fleet = fn[f] + " : " + string.Join("/", forFleet.Select(x => x.ToString("f1")))});
                foreach (var ship in ships)
                {
                    var rate = ship.EffectiveAntiAirForShip / 4.0;
                    var diff = forFleet.Select(x => (x + ship.EffectiveAntiAirForShip) / 10.0);
                    _table.Add(new Record
                    {
                        Ship = ship.Name + " Lv" + ship.Level +
                               " : " + ship.EffectiveAntiAirForShip.ToString("d"),
                        Id = ship.Id,
                    });
                    _table.Add(new Record
                    {
                        Rate = "割合: " + rate.ToString("f1") + "% ",
                        Diff = "固定: " + string.Join("/", diff.Select(d => d.ToString("f1")))
                    });
                }
            }
        }

        private void CreateLabels()
        {
            for (var i = _labelList.Count; i < _table.Count; i++)
                CreateLabels(i);
        }

        private void CreateLabels(int i)
        {
            var y = 1 + LineHeight * i;
            var lbp = new Panel
            {
                Location = new Point(0, y),
                Size = new Size(ListForm.PanelWidth, LineHeight),
                BackColor = ShipLabels.ColumnColors[(i + 1) % 2],
                Visible = false
            };
            lbp.Scale(ShipLabel.ScaleFactor);
            lbp.Tag = lbp.Location.Y;
            var labels = new[]
            {
                new ShipLabel {Location = new Point(1, 3), AutoSize = true},
                new ShipLabel {Location = new Point(10, 3), AutoSize = true},
                new ShipLabel {Location = new Point(35, 3), AutoSize = true},
                new ShipLabel {Location = new Point(100, 3), AutoSize = true},
            };
            _labelList.Add(labels);
            _panelList.Add(lbp);
            // ReSharper disable once CoVariantArrayConversion
            lbp.Controls.AddRange(labels);
            Controls.Add(lbp);
            foreach (var label in labels)
            {
                label.Scale();
                label.PresetColor =
                    label.BackColor = ShipLabels.ColumnColors[(i + 1) % 2];
            }
        }

        private void SetRecords()
        {
            for (var i = 0; i < _table.Count; i++)
                SetRecord(i);
            for (var i = _table.Count; i < _panelList.Count; i++)
                _panelList[i].Visible = false;
        }

        private void SetRecord(int i)
        {
            var lbp = _panelList[i];
            if (!lbp.Visible)
                lbp.Location = new Point(lbp.Left, (int)lbp.Tag + AutoScrollPosition.Y);
            var column = _table[i];
            var labels = _labelList[i];
            labels[0].Text = column.Fleet;
            labels[1].SetName(column.Ship);
            labels[2].Text = column.Rate;
            labels[3].Text = column.Diff;
            lbp.Visible = true;
        }

        public void ShowShip(int id)
        {
            var i = _table.FindIndex(e => e.Id == id);
            if (i == -1)
                return;
            var y = (int)Math.Round(ShipLabel.ScaleFactor.Height * LineHeight * i);
            AutoScrollPosition = new Point(0, y);
        }
    }
}