@page "/admin/tax-filing-schedules"
@using TaxBaik.Web.Services.AdminClients
@inject ITaxFilingScheduleBrowserClient TaxFilingClient
@inject IClientBrowserClient ClientClient
@inject ISnackbar Snackbar
@inject IDialogService DialogService
@attribute [Authorize]

<PageTitle>신고 일정</PageTitle>

<section class="admin-page-hero">
    <div>
        <MudText Typo="Typo.caption" Class="admin-eyebrow">CRM & 세무관리</MudText>
        <MudText Typo="Typo.h4" Class="admin-page-title">신고 일정</MudText>
        <MudText Typo="Typo.body2" Class="admin-page-subtitle">고객별 마감일과 처리 상태를 한 화면에서 관리합니다.</MudText>
    </div>
    <MudButton Variant="Variant.Filled"
               Color="Color.Primary"
               OnClick="OpenCreateDialog"
               StartIcon="@Icons.Material.Filled.Add">
        새 일정 추가
    </MudButton>
</section>

<MudPaper Class="admin-surface" Elevation="0">
    @if (schedules is null)
    {
        <MudProgressLinear Indeterminate="true" />
    }
    else if (schedules.Count == 0)
    {
        <MudAlert Severity="Severity.Info" Class="mt-4">
            <MudIcon Icon="@Icons.Material.Filled.EventBusy" Class="me-2" />
            신고 일정이 없습니다.
        </MudAlert>
    }
    else
    {
        <MudDataGrid T="TaxFilingSchedule"
                     Items="@schedules"
                     Dense="true"
                     Hover="true"
                     Striped="true"
                     Virtualize="true"
                     RowsPerPage="30"
                     Class="admin-grid">
            <Columns>
                <PropertyColumn Property="x => x.Id" Title="ID" Sortable="true" />
                <TemplateColumn Title="고객">
                    <CellTemplate>
                        @if (clientMap.TryGetValue(context.Item.ClientId, out var clientName))
                        {
                            <MudLink Href="@($"/taxbaik/admin/clients/{context.Item.ClientId}")" Color="Color.Primary">
                                @clientName
                            </MudLink>
                        }
                    </CellTemplate>
                </TemplateColumn>
                <PropertyColumn Property="x => x.FilingType" Title="신고 유형" />
                <TemplateColumn Title="마감일">
                    <CellTemplate>
                        @{
                            var daysLeft = (context.Item.DueDate.Date - DateTime.Today).Days;
                            var statusColor = daysLeft < 0 ? Color.Error : daysLeft <= 7 ? Color.Warning : Color.Success;
                        }
                        <MudChip Size="Size.Small" Color="@statusColor" Variant="Variant.Filled">
                            @context.Item.DueDate.ToString("yyyy-MM-dd")
                            @if (daysLeft >= 0)
                            {
                                <span class="ms-1">(D-@daysLeft)</span>
                            }
                            else
                            {
                                <span class="ms-1">(마감 @Math.Abs(daysLeft)일 경과)</span>
                            }
                        </MudChip>
                    </CellTemplate>
                </TemplateColumn>
                <PropertyColumn Property="x => x.FilingYear" Title="신고연도" />
                <TemplateColumn Title="상태">
                    <CellTemplate>
                        @if (context.Item.Status == "completed")
                        {
                            <MudChip Size="Size.Small" Color="Color.Success" Variant="Variant.Filled">완료</MudChip>
                        }
                        else
                        {
                            <MudChip Size="Size.Small" Color="Color.Default" Variant="Variant.Outlined">대기</MudChip>
                        }
                    </CellTemplate>
                </TemplateColumn>
                <TemplateColumn Title="작업" Sortable="false">
                    <CellTemplate>
                        <MudButtonGroup Size="Size.Small" Variant="Variant.Outlined">
                            @if (context.Item.Status != "completed")
                            {
                                <MudIconButton Icon="@Icons.Material.Filled.CheckCircle"
                                               Color="Color.Success"
                                               OnClick="@(async () => await CompleteSchedule(context.Item.Id))"
                                               Title="완료" />
                            }
                            <MudIconButton Icon="@Icons.Material.Filled.Delete"
                                           Color="Color.Error"
                                           OnClick="@(async () => await DeleteSchedule(context.Item.Id))"
                                           Title="삭제" />
                        </MudButtonGroup>
                    </CellTemplate>
                </TemplateColumn>
            </Columns>
        </MudDataGrid>
    }
</MudPaper>

<MudDialog @bind-IsVisible="isDialogOpen" Options="new DialogOptions { MaxWidth = MaxWidth.Small, FullWidth = true }">
    <TitleContent>
        <MudText Typo="Typo.h6">새 신고 일정 추가</MudText>
    </TitleContent>
    <DialogContent>
        <MudForm @ref="form">
            <MudSelect T="int?"
                       @bind-Value="scheduleForm.ClientId"
                       Label="고객"
                       Required="true"
                       Variant="Variant.Outlined"
                       FullWidth="true"
                       Class="mb-4"
                       RequiredError="고객을 선택하세요.">
                @foreach (var client in clients)
                {
                    <MudSelectItem Value="@((int?)client.Id)">@GetClientDisplayName(client)</MudSelectItem>
                }
            </MudSelect>
            <MudSelect T="string" @bind-Value="scheduleForm.FilingType" Label="신고 유형" Variant="Variant.Outlined" FullWidth="true" Class="mb-4" Required="true">
                <MudSelectItem Value="@("종합소득세")">종합소득세</MudSelectItem>
                <MudSelectItem Value="@("부가가치세")">부가가치세</MudSelectItem>
                <MudSelectItem Value="@("법인세")">법인세</MudSelectItem>
                <MudSelectItem Value="@("원천세")">원천세</MudSelectItem>
                <MudSelectItem Value="@("종합부동산세")">종합부동산세</MudSelectItem>
                <MudSelectItem Value="@("양도소득세")">양도소득세</MudSelectItem>
                <MudSelectItem Value="@("상속·증여세")">상속·증여세</MudSelectItem>
                <MudSelectItem Value="@("세무조정")">세무조정</MudSelectItem>
            </MudSelect>
            <MudDatePicker @bind-Date="scheduleForm.DueDate" Label="마감일" Variant="Variant.Outlined" FullWidth="true" Class="mb-4" Required="true" />
            <MudNumericField T="int" @bind-Value="scheduleForm.FilingYear" Label="신고연도" Variant="Variant.Outlined" FullWidth="true" Class="mb-4" Required="true" />
        </MudForm>
    </DialogContent>
    <DialogActions>
        <MudButton OnClick="CloseDialog">취소</MudButton>
        <MudButton Color="Color.Primary" OnClick="SaveSchedule">저장</MudButton>
    </DialogActions>
</MudDialog>

@code {
    [CascadingParameter]
    private Task<AuthenticationState>? AuthStateTask { get; set; }

    private List<TaxFilingSchedule>? schedules;
    private List<Client> clients = [];
    private Dictionary<int, string> clientMap = new();
    private MudForm? form;
    private bool isDialogOpen;
    private TaxFilingScheduleForm scheduleForm = new();
 
    protected override async Task OnAfterRenderAsync(bool firstRender)
    {
        if (firstRender)
        {
            if (AuthStateTask != null)
            {
                var authState = await AuthStateTask;
                if (authState.User.Identity?.IsAuthenticated == true)
                {
                    await LoadData();
                    StateHasChanged();
                }
            }
        }
    }

    private async Task LoadData()
    {
        try
        {
            schedules = await TaxFilingClient.GetAllAsync();
            var (clientItems, _) = await ClientClient.GetPagedAsync(pageSize: 1000);
            clients = clientItems.ToList();
            clientMap = clients.ToDictionary(c => c.Id, GetClientDisplayName);
        }
        catch (Exception ex)
        {
            Snackbar.Add($"데이터 로드 실패: {ex.Message}", Severity.Error);
        }
    }

    private void OpenCreateDialog()
    {
        scheduleForm = new TaxFilingScheduleForm
        {
            FilingYear = DateTime.Now.Year,
            DueDate = DateTime.Today,
            ClientId = clients.FirstOrDefault()?.Id
        };
        isDialogOpen = true;
    }

    private async Task SaveSchedule()
    {
        if (form != null)
        {
            await form.Validate();
            if (!form.IsValid)
            {
                Snackbar.Add("필수 항목을 입력해주세요.", Severity.Warning);
                return;
            }
        }

        try
        {
            if (scheduleForm.ClientId == null) return;
            var newId = await TaxFilingClient.CreateAsync(
                scheduleForm.ClientId.Value,
                scheduleForm.FilingType,
                scheduleForm.DueDate ?? DateTime.Today,
                scheduleForm.FilingYear);

            if (newId > 0)
            {
                Snackbar.Add("신고 일정이 추가되었습니다.", Severity.Success);
                CloseDialog();
                await LoadData();
            }
            else
            {
                Snackbar.Add("등록에 실패했습니다.", Severity.Error);
            }
        }
        catch (Exception ex)
        {
            Snackbar.Add($"저장 실패: {ex.Message}", Severity.Error);
        }
    }

    private async Task CompleteSchedule(int id)
    {
        try
        {
            await TaxFilingClient.MarkCompletedAsync(id);
            Snackbar.Add("신고 일정이 완료 처리되었습니다.", Severity.Success);
            await LoadData();
        }
        catch (Exception ex)
        {
            Snackbar.Add($"처리 실패: {ex.Message}", Severity.Error);
        }
    }

    private async Task DeleteSchedule(int id)
    {
        var parameters = new DialogParameters
        {
            { "Title", "삭제 확인" },
            { "Message", "이 신고 일정을 삭제하시겠습니까?" }
        };

        var dialog = await DialogService.ShowAsync<ConfirmDialog>("", parameters);
        var result = await dialog.Result;
        if (result?.Canceled ?? true)
            return;

        try
        {
            await TaxFilingClient.DeleteAsync(id);
            Snackbar.Add("신고 일정이 삭제되었습니다.", Severity.Success);
            await LoadData();
        }
        catch (Exception ex)
        {
            Snackbar.Add($"삭제 실패: {ex.Message}", Severity.Error);
        }
    }

    private void CloseDialog()
    {
        isDialogOpen = false;
        scheduleForm = new();
    }

    private static string GetClientDisplayName(Client client)
        => !string.IsNullOrWhiteSpace(client.CompanyName)
            ? client.CompanyName
            : !string.IsNullOrWhiteSpace(client.Name)
                ? client.Name
                : $"Client #{client.Id}";
    private class TaxFilingScheduleForm
    {
        public int? ClientId { get; set; }
        public string FilingType { get; set; } = "";
        public DateTime? DueDate { get; set; }
        public int FilingYear { get; set; } = DateTime.Now.Year;
    }
}