using System;
using System.Collections.Generic;
using System.Linq;
using LanMontainDesktop.ComponentSystem.Extensions;

namespace LanMontainDesktop.ComponentSystem;

public sealed class ComponentRegistry
{
    private readonly Dictionary<string, DesktopComponentDefinition> _definitions;

    public ComponentRegistry(IEnumerable<DesktopComponentDefinition> definitions)
    {
        _definitions = definitions
            .Where(d => !string.IsNullOrWhiteSpace(d.Id))
            .GroupBy(d => d.Id, StringComparer.OrdinalIgnoreCase)
            .ToDictionary(g => g.Key, g => g.Last(), StringComparer.OrdinalIgnoreCase);
    }

    public static ComponentRegistry CreateDefault()
    {
        var builtIn = new[]
        {
            new DesktopComponentDefinition(
                BuiltInComponentIds.Clock,
                "Clock",
                "Clock",
                "Status",
                MinWidthCells: 3,
                MinHeightCells: 1,
                AllowStatusBarPlacement: true,
                AllowDesktopPlacement: false),
            new DesktopComponentDefinition(
                BuiltInComponentIds.DesktopClock,
                "Clock",
                "Clock",
                "Clock",
                MinWidthCells: 2,
                MinHeightCells: 2,
                AllowStatusBarPlacement: false,
                AllowDesktopPlacement: true),
            new DesktopComponentDefinition(
                BuiltInComponentIds.DesktopWeatherClock,
                "Weather Clock",
                "Clock",
                "Clock",
                MinWidthCells: 2,
                MinHeightCells: 1,
                AllowStatusBarPlacement: false,
                AllowDesktopPlacement: true),
            new DesktopComponentDefinition(
                BuiltInComponentIds.DesktopTimer,
                "Timer",
                "Timer",
                "Clock",
                MinWidthCells: 2,
                MinHeightCells: 2,
                AllowStatusBarPlacement: false,
                AllowDesktopPlacement: true),
            new DesktopComponentDefinition(
                BuiltInComponentIds.DesktopWeather,
                "Weather",
                "WeatherSunny",
                "Weather",
                MinWidthCells: 2,
                MinHeightCells: 2,
                AllowStatusBarPlacement: false,
                AllowDesktopPlacement: true),
            new DesktopComponentDefinition(
                BuiltInComponentIds.DesktopHourlyWeather,
                "Hourly Weather",
                "WeatherSunny",
                "Weather",
                MinWidthCells: 4,
                MinHeightCells: 2,
                AllowStatusBarPlacement: false,
                AllowDesktopPlacement: true),
            new DesktopComponentDefinition(
                BuiltInComponentIds.DesktopMultiDayWeather,
                "Multi-day Weather",
                "WeatherSunny",
                "Weather",
                MinWidthCells: 4,
                MinHeightCells: 2,
                AllowStatusBarPlacement: false,
                AllowDesktopPlacement: true),
            new DesktopComponentDefinition(
                BuiltInComponentIds.DesktopExtendedWeather,
                "Extended Weather",
                "WeatherSunny",
                "Weather",
                MinWidthCells: 4,
                MinHeightCells: 4,
                AllowStatusBarPlacement: false,
                AllowDesktopPlacement: true),
            new DesktopComponentDefinition(
                BuiltInComponentIds.DesktopClassSchedule,
                "Class Schedule",
                "CalendarDate",
                "Date",
                MinWidthCells: 2,
                MinHeightCells: 4,
                AllowStatusBarPlacement: false,
                AllowDesktopPlacement: true,
                ResizeMode: DesktopComponentResizeMode.Free),
            new DesktopComponentDefinition(
                BuiltInComponentIds.DesktopMusicControl,
                "Music Control",
                "Play",
                "Media",
                MinWidthCells: 4,
                MinHeightCells: 2,
                AllowStatusBarPlacement: false,
                AllowDesktopPlacement: true),
            new DesktopComponentDefinition(
                BuiltInComponentIds.DesktopAudioRecorder,
                "Recorder",
                "MicOn",
                "Media",
                MinWidthCells: 2,
                MinHeightCells: 2,
                AllowStatusBarPlacement: false,
                AllowDesktopPlacement: true),
            new DesktopComponentDefinition(
                BuiltInComponentIds.DesktopDailyPoetry,
                "Daily Poetry",
                "Book",
                "Info",
                MinWidthCells: 4,
                MinHeightCells: 2,
                AllowStatusBarPlacement: false,
                AllowDesktopPlacement: true),
            new DesktopComponentDefinition(
                BuiltInComponentIds.DesktopDailyArtwork,
                "Daily Artwork",
                "Image",
                "Info",
                MinWidthCells: 4,
                MinHeightCells: 2,
                AllowStatusBarPlacement: false,
                AllowDesktopPlacement: true),
            new DesktopComponentDefinition(
                BuiltInComponentIds.DesktopWhiteboard,
                "Blackboard Portrait",
                "Edit",
                "Board",
                MinWidthCells: 2,
                MinHeightCells: 4,
                AllowStatusBarPlacement: false,
                AllowDesktopPlacement: true,
                ResizeMode: DesktopComponentResizeMode.Free),
            new DesktopComponentDefinition(
                BuiltInComponentIds.DesktopBlackboardLandscape,
                "Blackboard Landscape",
                "Edit",
                "Board",
                MinWidthCells: 4,
                MinHeightCells: 2,
                AllowStatusBarPlacement: false,
                AllowDesktopPlacement: true,
                ResizeMode: DesktopComponentResizeMode.Free),
            new DesktopComponentDefinition(
                BuiltInComponentIds.Date,
                "Calendar",
                "Calendar",
                "Date",
                MinWidthCells: 4,
                MinHeightCells: 2,
                AllowStatusBarPlacement: false,
                AllowDesktopPlacement: true),
            new DesktopComponentDefinition(
                BuiltInComponentIds.MonthCalendar,
                "Month Calendar",
                "CalendarMonth",
                "Date",
                MinWidthCells: 2,
                MinHeightCells: 2,
                AllowStatusBarPlacement: false,
                AllowDesktopPlacement: true),
            new DesktopComponentDefinition(
                BuiltInComponentIds.LunarCalendar,
                "Lunar Calendar",
                "Calendar",
                "Date",
                MinWidthCells: 2,
                MinHeightCells: 2,
                AllowStatusBarPlacement: false,
                AllowDesktopPlacement: true),
            new DesktopComponentDefinition(
                BuiltInComponentIds.HolidayCalendar,
                "Holiday Countdown",
                "Calendar",
                "Date",
                MinWidthCells: 2,
                MinHeightCells: 2,
                AllowStatusBarPlacement: false,
                AllowDesktopPlacement: true)
        };

        return new ComponentRegistry(builtIn);
    }

    public ComponentRegistry RegisterExtensions(IEnumerable<IComponentExtensionProvider> providers)
    {
        var merged = _definitions.Values.ToList();
        foreach (var provider in providers)
        {
            var externalDefinitions = provider.GetComponents();
            if (externalDefinitions is null)
            {
                continue;
            }

            merged.AddRange(externalDefinitions);
        }

        return new ComponentRegistry(merged);
    }

    public bool TryGetDefinition(string componentId, out DesktopComponentDefinition definition)
    {
        return _definitions.TryGetValue(componentId, out definition!);
    }

    public bool IsKnownComponent(string componentId)
    {
        return _definitions.ContainsKey(componentId);
    }

    public bool AllowsStatusBarPlacement(string componentId)
    {
        return _definitions.TryGetValue(componentId, out var definition) && definition.AllowStatusBarPlacement;
    }

    public IReadOnlyList<DesktopComponentDefinition> GetAll()
    {
        return _definitions.Values.OrderBy(d => d.Category).ThenBy(d => d.DisplayName).ToList();
    }
}