@page "/objects/houses"

@using System.IdentityModel.Claims
@using Hcs.WebApp.BackgroundServices
@using Hcs.WebApp.Components.Dialogs
@using Hcs.WebApp.Services
@using Microsoft.AspNetCore.Authorization
@using Microsoft.AspNetCore.Identity
@using Microsoft.EntityFrameworkCore

@implements IDisposable

@attribute [Authorize]

@inject AuthenticationStateProvider AuthenticationStateProvider
@inject HeadquartersService HeadquartersService
@inject HouseService HouseService
@inject DialogService DialogService
@inject CampaignManagementState CampaignManagementState

<PageTitle>Жилищный фонд</PageTitle>

<AuthorizedContent Roles="@($"{AppRole.ADMINISTRATOR_TYPE},{AppRole.OPERATOR_TYPE}")">
    <Content>
        <RadzenStack>
            <RadzenRow AlignItems="AlignItems.Center">
                <RadzenColumn Size="12" SizeMD="6">
                    <RadzenText Text="Жилищный фонд" TextStyle="TextStyle.H5" class="rz-m-0" />
                </RadzenColumn>
                <RadzenColumn Size="12" SizeMD="6">
                    <RadzenStack Orientation="Orientation.Horizontal" AlignItems="AlignItems.Center" JustifyContent="JustifyContent.End" Gap="0.5rem">
                        <RadzenButton Icon="sync" Text="@syncText" Disabled="@(state != SyncedPageState.Idle)" Click="@SyncHousesAsync" ButtonStyle="ButtonStyle.Primary" />
                    </RadzenStack>
                </RadzenColumn>
            </RadzenRow>
            <RadzenRow>
                <RadzenColumn SizeMD="12">
                    <RadzenAlert Visible="@hasError" AlertStyle="AlertStyle.Danger" Variant="Variant.Flat" Shade="Shade.Lighter" AllowClose="false">
                        @errorMessage
                    </RadzenAlert>
                    <RadzenDataGrid TItem="House" Data="@houses" RowExpand="@RowExpandAsync" IsLoading="@(state != SyncedPageState.Idle)" AllowFiltering="true" AllowPaging="true" ShowPagingSummary="true" PageSizeOptions=@(new int[] { 5, 10, 20, 30 }) AllowSorting="true" ExpandMode="DataGridExpandMode.Single">
                        @* <Template Context="house">
                            <RadzenDataGrid Data="@registry.Elements" AllowFiltering="true" AllowSorting="true">
                                <Columns>
                                    <RadzenDataGridColumn Property="@nameof(RegistryElement.Code)" Title="Код" SortOrder="SortOrder.Ascending" Resizable="false" Width="100px" MaxWidth="100px" />
                                    <RadzenDataGridColumn Property="@nameof(RegistryElement.GUID)" Title="Идентификатор" />
                                    <RadzenDataGridColumn Filterable="false" Sortable="false" TextAlign="TextAlign.Center" Width="70px">
                                        <Template Context="registryElement">
                                            <RadzenButton Click="@(() => ShowElementAsync(registryElement))" @onclick:stopPropagation="true" ButtonStyle="ButtonStyle.Primary" Icon="visibility" Size="ButtonSize.Small" />
                                        </Template>
                                    </RadzenDataGridColumn>
                                </Columns>
                            </RadzenDataGrid>
                        </Template> *@
                        <Columns>
                            <RadzenDataGridColumn TItem="Registry" Property="@nameof(Registry.Number)" Title="Номер" Resizable="false" Width="100px" MaxWidth="100px" />
                            <RadzenDataGridColumn TItem="Registry" Property="@nameof(Registry.Name)" Title="Название" />
                        </Columns>
                    </RadzenDataGrid>
                </RadzenColumn>
            </RadzenRow>
        </RadzenStack>
    </Content>
</AuthorizedContent>

@code {
    SyncedPageState state;
    IEnumerable<House> houses;
    string syncText = "...";
    bool hasError;
    string errorMessage;

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

        if (firstRender)
        {
            ChangeState(SyncedPageState.Init);

            var finalState = SyncedPageState.Idle;
            var state = await AuthenticationStateProvider.GetAuthenticationStateAsync();
            if (state.User.IsOperatorOrHigher())
            {
                var operationInProgress = await HeadquartersService.HasActiveCampaignAsync(Campaign.CampaignType.ExportHousesData_15_7_0_1);
                if (operationInProgress)
                {
                    finalState = SyncedPageState.SyncWaiting;
                }

                CampaignManagementState.OnCampaignCreated += OnCampaignCreated;
                CampaignManagementState.OnCampaignEnded += OnCampaignEnded;

                houses = await HouseService.GetAllHousesAsync();
            }

            ChangeState(finalState);
        }
    }

    async Task SyncHousesAsync()
    {
        if (state == SyncedPageState.SyncWaiting) return;

        ChangeState(SyncedPageState.SyncWaiting);

        if (await HeadquartersService.HasActiveCampaignAsync(Campaign.CampaignType.ExportHousesData_15_7_0_1))
        {
            ChangeState(SyncedPageState.Idle);
        }
        else
        {
            // TODO: Use user id
            var campaign = await HeadquartersService.InitiateCampaignAsync(Campaign.CampaignType.ExportHousesData_15_7_0_1, "");
            CampaignManagementState.EnqueueCampaign(campaign);
        }
    }

    async Task RowExpandAsync(House house)
    {
        // TODO
    }

    async Task ShowElementAsync(RegistryElement registryElement)
    {
        // await DialogService.OpenAsync<ViewRegistryElement>(
        //     "Просмотр записи",
        //     new Dictionary<string, object>()
        //     {
        //         { nameof(ViewRegistryElement.RegistryElement), registryElement }
        //     },
        //     new DialogOptions()
        //     {
        //         Width = "420px",
        //         Height = "600px"
        //     });
    }

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

        this.state = state;

        SetSyncText();
        StateHasChanged();
    }

    void SetSyncText()
    {
        switch (state)
        {
            case SyncedPageState.Init:
                syncText = "...";
                break;

            case SyncedPageState.Loading:
            case SyncedPageState.Idle:
                syncText = "Синхронизировать";
                break;

            case SyncedPageState.SyncWaiting:
                syncText = "Идет синхронизация...";
                break;
        }
    }

    void OnCampaignCreated(Campaign campaign)
    {
        if (campaign.Type == Campaign.CampaignType.ExportHousesData_15_7_0_1)
        {
            InvokeAsync(() => ChangeState(SyncedPageState.SyncWaiting));
        }
    }

    void OnCampaignEnded(int campaignId, Campaign.CampaignType type, DateTime endedAt, string failureReason)
    {
        if (type == Campaign.CampaignType.ExportHousesData_15_7_0_1)
        {
            Task.Run(RefreshHouses);
        }
    }

    async Task RefreshHouses()
    {
        await InvokeAsync(() => ChangeState(SyncedPageState.Loading));

        var refreshedHouses = await HouseService.GetAllHousesAsync();

        await InvokeAsync(() =>
        {
            houses = refreshedHouses;

            ChangeState(SyncedPageState.Idle);
        });
    }

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