@page "/campaigns"

@using Hcs.WebApp.BackgroundServices
@using Hcs.WebApp.Services
@using Microsoft.AspNetCore.Authorization

@implements IDisposable

@attribute [Authorize]

@inject AuthenticationStateProvider AuthenticationStateProvider
@inject HeadquartersService HeadquartersService
@inject CampaignManagementState CampaignManagementState
@inject EventsAggregator EventsAggregator

<PageTitle>Кампании</PageTitle>

<AuthorizedContent Roles="@($"{AppRole.ADMINISTRATOR_TYPE},{AppRole.OPERATOR_TYPE}")">
    <Content>
        <RadzenStack>
            <RadzenRow AlignItems="AlignItems.Center">
                <RadzenColumn Size="12" SizeMD="12">
                    <RadzenText Text="Кампании" TextStyle="TextStyle.H5" class="rz-m-0" />
                </RadzenColumn>
            </RadzenRow>
            <RadzenRow>
                <RadzenColumn SizeMD="12">
                    <div>
                        <RadzenDataGrid @ref="@campaignsDataGrid" TItem="Campaign" Data="@campaigns" RowExpand="@RowExpandAsync" RowCollapse="@RowCollapse" IsLoading="@(state != PageState.Idle)" CellRender="@OnCellRender" AllowFiltering="true" AllowPaging="true" ShowPagingSummary="true" PageSizeOptions=@(new int[] { 5, 10, 20, 30 }) AllowSorting="true" AllowColumnResize="true" ExpandMode="DataGridExpandMode.Single">
                            <Template Context="campaign">
                                <RadzenDataGrid @ref="@operationsDataGrid" Data="@campaign.Operations" CellRender="@OnCellRender" AllowFiltering="true" AllowPaging="true" ShowPagingSummary="true" PageSizeOptions=@(new int[] { 5, 10, 20, 30 }) AllowSorting="true" AllowColumnResize="true">
                                    <Columns>
                                        <RadzenDataGridColumn Property="@nameof(Operation.Id)" Title="ID" SortOrder="SortOrder.Descending" Resizable="false" Width="100px" MaxWidth="100px" />
                                        <RadzenDataGridColumn Property="@nameof(Operation.Type)" Title="Тип операции" />
                                        <RadzenDataGridColumn Property="@nameof(Operation.CreatedAt)" Title="Дата создания" Resizable="false" Width="150px" MaxWidth="150px" />
                                        <RadzenDataGridColumn Property="@nameof(Operation.StartedAt)" Title="Дата начала" Resizable="false" Width="150px" MaxWidth="150px" />
                                        <RadzenDataGridColumn Property="@nameof(Operation.EndedAt)" Title="Дата окончания" Resizable="false" Width="150px" MaxWidth="150px" />
                                        <RadzenDataGridColumn Property="@nameof(Operation.MessageGuid)" Title="ID сообщения" />
                                        <RadzenDataGridColumn Property="@nameof(Operation.FailureReason)" Title="Причина ошибки" />
                                    </Columns>
                                </RadzenDataGrid>
                            </Template>
                            <Columns>
                                <RadzenDataGridColumn TItem="Campaign" Property="@nameof(Campaign.Id)" Title="ID" SortOrder="SortOrder.Descending" Resizable="false" Width="100px" MaxWidth="100px" />
                                <RadzenDataGridColumn TItem="Campaign" Property="@nameof(Campaign.Type)" Title="Тип кампании" />
                                <RadzenDataGridColumn Title="Прогресс" Filterable="false" Sortable="false" Resizable="false" Width="70px" MaxWidth="70px">
                                    <Template Context="campaign">
                                        <RadzenProgressBar ProgressBarStyle="@(campaign.EndedAt.HasValue ? (string.IsNullOrEmpty(campaign.FailureReason) ? ProgressBarStyle.Success : ProgressBarStyle.Danger) : ProgressBarStyle.Primary)" Value="@campaign.Progress" ShowValue="false" />
                                    </Template>
                                </RadzenDataGridColumn>
                                <RadzenDataGridColumn TItem="Campaign" Property="@nameof(Campaign.CreatedAt)" Title="Дата создания" Resizable="false" Width="150px" MaxWidth="150px" />
                                <RadzenDataGridColumn TItem="Campaign" Property="@nameof(Campaign.StartedAt)" Title="Дата начала" Resizable="false" Width="150px" MaxWidth="150px" />
                                <RadzenDataGridColumn TItem="Campaign" Property="@nameof(Campaign.EndedAt)" Title="Дата окончания" Resizable="false" Width="150px" MaxWidth="150px" />
                                <RadzenDataGridColumn TItem="Campaign" Property="@nameof(Campaign.FailureReason)" Title="Причина ошибки" />
                            </Columns>
                        </RadzenDataGrid>
                    </div>
                </RadzenColumn>
            </RadzenRow>
        </RadzenStack>
    </Content>
</AuthorizedContent>

@code {
    PageState state;
    RadzenDataGrid<Campaign> campaignsDataGrid;
    RadzenDataGrid<Operation> operationsDataGrid;
    IEnumerable<Campaign>? campaigns;
    Campaign? expandedCampaign;

    protected override async Task OnAfterRenderAsync(bool firstRender)
    {
        await base.OnAfterRenderAsync(firstRender);

        if (firstRender)
        {
            ChangeState(PageState.Loading);

            var state = await AuthenticationStateProvider.GetAuthenticationStateAsync();
            if (state.User.IsOperatorOrHigher())
            {
                campaigns = await HeadquartersService.GetCampaignsAsync();

                CampaignManagementState.OnCampaignCreated += OnCampaignCreated;
                CampaignManagementState.OnCampaignStarted += OnCampaignStarted;
                CampaignManagementState.OnCampaignProgressStep += OnCampaignProgressStep;
                CampaignManagementState.OnCampaignEnded += OnCampaignEnded;

                EventsAggregator.OnOperationStarted += OnOperationStarted;
                EventsAggregator.OnOperationExecuted += OnOperationExecuted;
                EventsAggregator.OnOperationEnded += OnOperationEnded;
            }

            ChangeState(PageState.Idle);
        }
    }

    async Task RowExpandAsync(Campaign campaign)
    {
        expandedCampaign = campaign;

        if (campaign.Operations == null)
        {
            campaign.Operations = await HeadquartersService.GetOperationsAsync(campaign.Id);
        }
    }

    void RowCollapse(Campaign campaign)
    {
        if (expandedCampaign != null && expandedCampaign.Id == campaign.Id)
        {
            expandedCampaign = null;
        }

        campaign.Operations = null;
    }

    void OnCellRender(DataGridCellRenderEventArgs<Campaign> args)
    {
        if (args.Column.Property == nameof(Campaign.FailureReason))
        {
            args.Attributes.Add("class", "white-text");
            args.Attributes.Add("style", $"background-color: {(!string.IsNullOrEmpty(args.Data.FailureReason) ? "var(--rz-danger)" : "var(--rz-base-background-color)")};");
        }
    }

    void OnCellRender(DataGridCellRenderEventArgs<Operation> args)
    {
        if (args.Column.Property == nameof(Operation.FailureReason))
        {
            args.Attributes.Add("class", "white-text");
            args.Attributes.Add("style", $"background-color: {(!string.IsNullOrEmpty(args.Data.FailureReason) ? "var(--rz-danger)" : "var(--rz-base-background-color)")};");
        }
    }

    void ChangeState(PageState state)
    {
        if (this.state == state) return;

        this.state = state;

        StateHasChanged();
    }

    void OnCampaignCreated(Campaign campaign)
    {
        Task.Run(RefreshCampaigns);
    }

    async Task RefreshCampaigns()
    {
        await InvokeAsync(() => ChangeState(PageState.Loading));

        var refreshedCampaigns = await HeadquartersService.GetCampaignsAsync();

        await InvokeAsync(() =>
        {
            campaigns = refreshedCampaigns;
            expandedCampaign = null;

            ChangeState(PageState.Idle);
        });
    }

    void OnCampaignStarted(int campaignId, DateTime startedAt)
    {
        InvokeAsync(() =>
        {
            var targetCampaign = campaigns?.FirstOrDefault(x => x.Id == campaignId);
            if (targetCampaign != null)
            {
                targetCampaign.StartedAt = startedAt;

                campaignsDataGrid.Reload();
            }

            if (expandedCampaign != null && expandedCampaign.Id == campaignId)
            {
                campaignsDataGrid.CollapseAll();
            }
        });
    }

    void OnCampaignProgressStep(int campaignId, int step, int progress)
    {
        InvokeAsync(() =>
        {
            var targetCampaign = campaigns?.FirstOrDefault(x => x.Id == campaignId);
            if (targetCampaign != null)
            {
                targetCampaign.Step = step;
                targetCampaign.Progress = progress;

                campaignsDataGrid.Reload();

                if (expandedCampaign != null && expandedCampaign.Id == campaignId)
                {
                    campaignsDataGrid.CollapseAll();
                }
            }
        });
    }

    void OnCampaignEnded(int campaignId, Campaign.CampaignType type, DateTime endedAt, string failureReason)
    {
        InvokeAsync(() =>
        {
            var targetCampaign = campaigns?.FirstOrDefault(x => x.Id == campaignId);
            if (targetCampaign != null)
            {
                targetCampaign.EndedAt = endedAt;
                targetCampaign.FailureReason = failureReason;

                campaignsDataGrid.Reload();
            }

            if (expandedCampaign != null && expandedCampaign.Id == campaignId)
            {
                campaignsDataGrid.CollapseAll();
            }
        });
    }

    void OnOperationStarted(int operationId, int campaignId, DateTime startedAt)
    {
        InvokeAsync(() =>
        {
            if (expandedCampaign != null && expandedCampaign.Id == campaignId)
            {
                var targetOperation = expandedCampaign.Operations?.FirstOrDefault(x => x.Id == operationId);
                if (targetOperation != null)
                {
                    targetOperation.StartedAt = startedAt;

                    operationsDataGrid.Reload();
                }
            }
        });
    }

    void OnOperationExecuted(int operationId, int campaignId, string messageGuid)
    {
        InvokeAsync(() =>
        {
            if (expandedCampaign != null && expandedCampaign.Id == campaignId)
            {
                var targetOperation = expandedCampaign.Operations?.FirstOrDefault(x => x.Id == operationId);
                if (targetOperation != null)
                {
                    targetOperation.MessageGuid = messageGuid;

                    operationsDataGrid.Reload();
                }
            }
        });
    }

    void OnOperationEnded(int operationId, int campaignId, DateTime endedAt, string failureReason)
    {
        InvokeAsync(() =>
        {
            if (expandedCampaign != null && expandedCampaign.Id == campaignId)
            {
                var targetOperation = expandedCampaign.Operations?.FirstOrDefault(x => x.Id == operationId);
                if (targetOperation != null)
                {
                    targetOperation.EndedAt = endedAt;
                    targetOperation.FailureReason = failureReason;

                    operationsDataGrid.Reload();
                }
            }
        });
    }

    public void Dispose()
    {
        CampaignManagementState.OnCampaignCreated -= OnCampaignCreated;
        CampaignManagementState.OnCampaignStarted -= OnCampaignStarted;
        CampaignManagementState.OnCampaignProgressStep -= OnCampaignProgressStep;
        CampaignManagementState.OnCampaignEnded -= OnCampaignEnded;

        EventsAggregator.OnOperationStarted -= OnOperationStarted;
        EventsAggregator.OnOperationExecuted -= OnOperationExecuted;
        EventsAggregator.OnOperationEnded -= OnOperationEnded;
    }
}