@using LANCommander.Launcher.Data.Models
@using LANCommander.Launcher.Models
@using System.Diagnostics
@namespace LANCommander.Launcher.UI
@implements IDisposable
@inject GameService GameService
@inject LibraryService LibraryService
@inject InstallService InstallService
@inject GameClient GameClient
@inject LobbyClient LobbyClient
@inject ModalService ModalService
@inject MessageService MessageService
@inject LocalizationService LocalizationService

@if (State == PlayButtonState.Running)
{
    <Popconfirm Title="@LocalizationService.GetString("DoYouWantToStopGame")" OkText="@LocalizationService.GetString("Yes")" OnConfirm="() => Stop()">
        <Button Type="ButtonType.Primary" Size="ButtonSize.Large" Icon="@IconType.Outline.CaretRight">@LocalizationService.GetString("Running")</Button>
    </Popconfirm>
}
else if (State == PlayButtonState.Starting)
{
    <Button Type="ButtonType.Primary" Size="ButtonSize.Large" Loading="true">@LocalizationService.GetString("Starting")</Button>
}
else if (State == PlayButtonState.Stopping)
{
    <Button Type="ButtonType.Primary" Size="ButtonSize.Large" Loading="true">@LocalizationService.GetString("Stopping")</Button>
}
else
{
    <Space Direction="SpaceDirection.Horizontal">
        <SpaceItem>
            <Button Type="ButtonType.Primary" Size="ButtonSize.Large" Icon="@IconType.Outline.CaretRight" OnClick="() => Run()">@LocalizationService.GetString("Play")</Button>
        </SpaceItem>

        <SpaceItem>
            <Dropdown>
                <Overlay>
                    <Menu>
                        <LibraryItemContextMenu Model="LibraryItem" MenuExtra="MenuExtra" />
                    </Menu>
                </Overlay>

                <ChildContent>
                    <Button Type="@ButtonType.Default" Size="ButtonSize.Large" Icon="@IconType.Outline.Ellipsis" />
                </ChildContent>
            </Dropdown>
        </SpaceItem>
    </Space>
}

@code {
    [Parameter] public required Guid LibraryItemId { get; set; }
    [Parameter] public required Models.ListItem LibraryItem { get; set; }
    [Parameter] public required RenderFragment MenuExtra { get; set; }

    Timer? StateTimer;
    PlayButtonState State = PlayButtonState.Idle;

    public enum PlayButtonState
    {
        Idle,
        Starting,
        Running,
        Stopping
    }

    protected override async Task OnInitializedAsync()
    {
        StateTimer = new Timer(state => { InvokeAsync(UpdateState); }, null, 0, 250);

        InstallService.OnQueueChanged += HandleQueueChanged;
        InstallService.OnInstallComplete += HandleInstallComplete;
    }

    async Task HandleQueueChanged()
    {
        if (LibraryItem == null)
            return;

        var queueItem = InstallService.Queue.FirstOrDefault(qi => qi.Id == LibraryItem.Key);

        if (queueItem != null && (queueItem.Status == SDK.Enums.InstallStatus.Canceled ||
                                   queueItem.Status == SDK.Enums.InstallStatus.Failed))
        {
            LibraryItem = await LibraryService.GetItemAsync(LibraryItem.Key);
            await InvokeAsync(StateHasChanged);
        }
    }

    async Task HandleInstallComplete(Data.Models.Game game)
    {
        if (LibraryItem?.Key == game.Id)
        {
            LibraryItem = await LibraryService.GetItemAsync(LibraryItem.Key);
            await InvokeAsync(StateHasChanged);
        }
    }

    protected override async Task OnParametersSetAsync()
    {
        if (LibraryItem == null && LibraryItemId != Guid.Empty)
            LibraryItem = await LibraryService.GetItemAsync(LibraryItemId);
    }

    async Task UpdateState()
    {
        if (State != PlayButtonState.Starting && GameClient.IsRunning(LibraryItem.Key))
        {
            await ChangeState(PlayButtonState.Running);
        }
        else if (State == PlayButtonState.Running && !GameClient.IsRunning(LibraryItem.Key))
        {
            await ChangeState(PlayButtonState.Idle);
        }
    }

    async Task ChangeState(PlayButtonState state)
    {
        State = state;
        await InvokeAsync(StateHasChanged);
    }

    async Task Run()
    {
        var game = (Game)LibraryItem.DataItem;

        await ChangeState(PlayButtonState.Starting);

        var actions = await GameClient.GetActionsAsync(game.InstallDirectory, game.Id);

        if (actions == null || actions.Count() == 0)
        {
            MessageService.Error(LocalizationService.GetString("NoActionsFound"));

            await ChangeState(PlayButtonState.Idle);
            return;
        }

        var primaryActions = actions.Where(a => a.IsPrimaryAction && LibraryService.IsInstalled(game.Id));

        if (primaryActions.Count() == 0)
        {
            MessageService.Error(LocalizationService.GetString("NoPrimaryActionFound"));
            
            await ChangeState(PlayButtonState.Idle);
            return;
        }

        if (primaryActions.Count() == 1)
        {
            var task = GameService.Run(game, primaryActions.First());

            while (!GameClient.IsRunning(game.Id) && !task.IsCompleted)
                await Task.Delay(100);

            if (GameClient.IsRunning(game.Id))
                await ChangeState(PlayButtonState.Running);
            else
                await ChangeState(PlayButtonState.Idle);

            await task;
        }
        else
        {
            var modalOptions = new ModalOptions()
            {
                Title = LocalizationService.GetString("PlayGame", game.Title),
                Maximizable = false,
                DefaultMaximized = false,
                Closable = true,
                MaskClosable = true,
                Footer = null,
                Centered = true,
                WrapClassName = "game-actions-dialog",
                AfterClose = async () =>
                {
                    LobbyClient.ReleaseSteam();

                    await ChangeState(PlayButtonState.Idle);
                }
            };

            var model = new ActionSelectorDialogOptions
            {
                Actions = actions.Where(a => a.IsPrimaryAction),
                Game = game
            };

            var modalRef = ModalService.CreateModal<ActionSelectorDialog, ActionSelectorDialogOptions, Process>(modalOptions, model);
        }
    }

    async Task Stop()
    {
        await ChangeState(PlayButtonState.Stopping);
        
        await GameClient.Stop(LibraryItem.Key);

        await ChangeState(PlayButtonState.Idle);
    }

    public void Dispose()
    {
        StateTimer?.Dispose();
        InstallService.OnQueueChanged -= HandleQueueChanged;
        InstallService.OnInstallComplete -= HandleInstallComplete;
    }
}