using System;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;
using NHSE.Core;
using NHSE.Sprites;

namespace NHSE.WinForms
{
    public partial class BuildingEditor : Form
    {
        private readonly IReadOnlyList<Building> Buildings;
        private readonly MainSave SAV;
        private static readonly IReadOnlyDictionary<string, string[]> HelpDictionary = StructureUtil.GetStructureHelpList();

        private readonly Bitmap Map;
        private readonly int[] Scale1;
        private readonly int[] ScaleX;
        private readonly MapTerrainStructure Manager;
        private const int scale = 4;

        public BuildingEditor(MainSave sav)
        {
            InitializeComponent();
            this.TranslateInterface(GameInfo.CurrentLanguage);
            Manager = new MapTerrainStructure(sav);
            SAV = sav;
            Buildings = Manager.Buildings;

            Scale1 = new int[Manager.Terrain.MapWidth * Manager.Terrain.MapHeight];
            ScaleX = new int[Scale1.Length * scale * scale];
            Map = new Bitmap(Manager.Terrain.MapWidth * scale, Manager.Terrain.MapHeight * scale);
            NUD_PlazaX.Value = sav.EventPlazaLeftUpX;
            NUD_PlazaY.Value = sav.EventPlazaLeftUpZ;

            foreach (var obj in Manager.Buildings)
                LB_Items.Items.Add(obj.ToString());

            LB_Items.SelectedIndex = 0;
            foreach (var entry in HelpDictionary)
                CB_StructureType.Items.Add(entry.Key);
            CB_StructureType.SelectedIndex = 0;

            DialogResult = DialogResult.Cancel;
        }

        private void B_Cancel_Click(object sender, EventArgs e) => Close();

        private void B_Save_Click(object sender, EventArgs e)
        {
            SAV.EventPlazaLeftUpX = (uint)NUD_PlazaX.Value;
            SAV.EventPlazaLeftUpZ = (uint)NUD_PlazaY.Value;

            DialogResult = DialogResult.OK;
            SAV.Buildings = Manager.Buildings;
            Close();
        }

        private int Index;
        private bool Loading;

        private void DrawMap(in int index)
        {
            var font = B_Save.Font;
            Manager.PlazaX = (ushort) NUD_PlazaX.Value;
            Manager.PlazaY = (ushort) NUD_PlazaY.Value;
            PB_Map.Image = TerrainSprite.GetMapWithBuildings(Manager, font, Scale1, ScaleX, Map, scale, index);
        }

        private void LB_Items_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (LB_Items.SelectedIndex < 0)
                return;
            LoadIndex(LB_Items.SelectedIndex);
            DrawMap(Index);
        }

        private void LoadIndex(int index)
        {
            Loading = true;
            Index = index;
            var b = Buildings[index];
            NUD_BuildingType.Value = (int)b.BuildingType;
            NUD_X.Value = b.X;
            NUD_Y.Value = b.Y;
            NUD_Angle.Value = b.Angle;
            NUD_Bit.Value = b.Bit;
            NUD_Type.Value = b.Type;
            NUD_TypeArg.Value = b.TypeArg;
            NUD_UniqueID.Value = b.UniqueID;
            Loading = false;
        }

        private void NUD_BuildingType_ValueChanged(object sender, EventArgs e)
        {
            if (Loading || !(sender is NumericUpDown n))
                return;

            var b = Buildings[Index];
            if (sender == NUD_BuildingType)
                b.BuildingType = (BuildingType)n.Value;
            else if (sender == NUD_X)
                b.X = (ushort)n.Value;
            else if (sender == NUD_Y)
                b.Y = (ushort)n.Value;
            else if (sender == NUD_Angle)
                b.Angle = (byte)n.Value;
            else if (sender == NUD_Bit)
                b.Bit = (sbyte)n.Value;
            else if (sender == NUD_Type)
                b.Type = (ushort)n.Value;
            else if (sender == NUD_TypeArg)
                b.TypeArg = (byte)n.Value;
            else if (sender == NUD_UniqueID)
                b.UniqueID = (ushort)n.Value;

            LB_Items.Items[Index] = Buildings[Index].ToString();
            DrawMap(Index);
        }

        private void CB_StructureType_SelectedIndexChanged(object sender, EventArgs e)
        {
            var name = CB_StructureType.Text;
            var values = HelpDictionary[name];
            CB_StructureValues.Items.Clear();
            foreach (var item in values)
                CB_StructureValues.Items.Add(item);
            CB_StructureValues.SelectedIndex = 0;
        }

        private void NUD_PlazaCoordinate_ValueChanged(object sender, EventArgs e) => DrawMap(Index);

        private void B_DumpAll_Click(object sender, EventArgs e) => MapDumpHelper.DumpBuildings(Buildings);

        private void B_ImportAll_Click(object sender, EventArgs e)
        {
            if (!MapDumpHelper.ImportBuildings(Buildings))
                return;

            for (int i = 0; i < Buildings.Count; i++)
                LB_Items.Items[i] = Buildings[i].ToString();
            LB_Items.SelectedIndex = 0;
            DrawMap(0);
            System.Media.SystemSounds.Asterisk.Play();
        }
    }
}