@using System.Diagnostics
@using LANCommander.Launcher.Data.Models
@using LANCommander.Launcher.Models
@using LANCommander.Launcher.Services.Extensions
@using System.ComponentModel.DataAnnotations
@inherits FeedbackComponent<Models.ListItem, string>
@inject InstallService InstallService
@inject SDK.Client Client

<div style="padding: 16px;">
    <Row Gutter="16">
        <Col Span="12">
            <Statistic Title="Download Size" Value="@ByteSizeLib.ByteSize.FromBytes(GetDownloadSize()).ToString()" Style="text-align: center;" />
        </Col>
        <Col Span="12">
            <Statistic Title="Space Required" Value="@ByteSizeLib.ByteSize.FromBytes(GetSpaceRequired()).ToString()" Style="text-align: center;" />
        </Col>
    </Row>


    @if (Addons.Any())
    {
        <Divider Text="Addons" />

        <CheckboxButtonGroup DataSource="Addons" KeySelector="a => a.Id" LabelSelector="a => a.Title" Direction="DirectionVHType.Vertical" />
    }

    @if (Settings.Games.InstallDirectories.Length > 1)
    {
        <Divider Text="Install Location" />
        <RadioGroup @bind-Value="SelectedDirectory" ButtonStyle="RadioButtonStyle.Solid" Size="large" Class="install-dialog-directory-selector radio-group-vertical radio-group-block">
            @foreach (var directory in Settings.Games.InstallDirectories)
            {
                <Radio RadioButton Value="@directory">
                    <GridRow>
                        <GridCol Flex="@("auto")">
                            @directory
                        </GridCol>
                        <GridCol>
                            @ByteSizeLib.ByteSize.FromBytes(GetFreeSpace(directory))
                        </GridCol>
                    </GridRow>
                </Radio>
            }
        </RadioGroup>
    }
</div>


<Flex Gap="middle" Style="padding: 16px; padding-top: 0px" Justify="flex-end">
    @if (GetOperation() != InstallOperation.None)
    {
        <Button Type="@ButtonType.Primary" OnClick="Install">@GetOperation()</Button>
    }

    <Button OnClick="() => Close()">Close</Button>
</Flex>

@code {
    Settings Settings = SettingService.GetSettings();

    string SelectedDirectory = "";

    List<SDK.Models.Game> Addons = new();

    SDK.Models.Game RemoteGame;
    Data.Models.Game Game;

    Guid[] SelectedAddonIds = new Guid[] { };

    enum InstallOperation
    {
        None,
        Install,
        Move,
        Modify,
    }

    protected override async Task OnInitializedAsync()
    {
        Game = Options.DataItem as Game;

        if (Game.Installed)
            SelectedDirectory = Settings.Games.InstallDirectories.FirstOrDefault(d => Game.InstallDirectory.StartsWith(d));

        if (String.IsNullOrWhiteSpace(SelectedDirectory))
            SelectedDirectory = Settings.Games.InstallDirectories.First();

        RemoteGame = await Client.Games.GetAsync(Options.Key);

        if (RemoteGame.DependentGames != null)
        {
            var dependentGames = new List<SDK.Models.Game>();

            foreach (var dependentGame in RemoteGame.DependentGames)
            {
                dependentGames.Add(await Client.Games.GetAsync(dependentGame));
            }

            Addons = dependentGames.Where(g => g.Type.IsIn(SDK.Enums.GameType.Expansion, SDK.Enums.GameType.Mod)).OrderByTitle(g => g.Title ?? g.SortTitle).ToList();
        }
        else
            Addons = new List<SDK.Models.Game>();
    }

    async Task Close()
    {
        await CloseFeedbackAsync();
    }

    async Task Install()
    {
        var game = Options.DataItem as Game;

        InstallService.Add(game, SelectedDirectory, SelectedAddonIds);

        await CloseFeedbackAsync();
    }

    InstallOperation GetOperation()
    {
        if (!Game.Installed)
            return InstallOperation.Install;

        if (Game.DependentGames.Any(g => !g.Installed && SelectedAddonIds.Contains(g.Id)))
            return InstallOperation.Modify;

        if (!Game.InstallDirectory.StartsWith(SelectedDirectory))
            return InstallOperation.Move;

        return InstallOperation.None;
    }

    void OnAddonsSelectedChange(string[] selectedIds)
    {
        try
        {
            SelectedAddonIds = selectedIds.Select(id => Guid.Parse(id)).ToArray();
        }
        catch (Exception ex)
        {
            SelectedAddonIds = new Guid[] { };
        }
    }

    long GetDownloadSize()
    {
        long size = 0;

        if (RemoteGame != null && RemoteGame.Archives.Any())
        {
            size += RemoteGame.Archives.OrderByDescending(a => a.CreatedOn).First().CompressedSize;

            size += Addons.Where(a => SelectedAddonIds.Contains(a.Id)).Sum(a => a.Archives.OrderByDescending(arc => arc.CreatedOn).First().CompressedSize);
        }

        return size;
    }

    long GetSpaceRequired()
    {
        long size = 0;

        if (RemoteGame != null && RemoteGame.Archives.Any())
        {
            size += RemoteGame.Archives.OrderByDescending(a => a.CreatedOn).First().UncompressedSize;

            size += Addons.Where(a => SelectedAddonIds.Contains(a.Id)).Sum(a => a.Archives.OrderByDescending(arc => arc.CreatedOn).First().UncompressedSize);
        }

        return size;
    }

    long GetFreeSpace(string path)
    {
        var root = Path.GetPathRoot(path);
        var drive = new DriveInfo(path);

        return drive.AvailableFreeSpace;
    }
}