@page "/admin/blog"
@attribute [Authorize]
@inject IApiClient ApiClient
@inject ISnackbar Snackbar

<PageTitle>블로그 관리</PageTitle>

<section class="admin-page-hero">
    <div>
        <MudText Typo="Typo.caption" Class="admin-eyebrow">Content</MudText>
        <MudText Typo="Typo.h4" Class="admin-page-title">블로그 관리</MudText>
        <MudText Typo="Typo.body2" Class="admin-page-subtitle">검색 유입 콘텐츠의 발행 상태와 성과를 관리합니다.</MudText>
    </div>
    <MudButton Variant="Variant.Filled" Color="Color.Primary" StartIcon="@Icons.Material.Filled.EditNote"
        Href="/taxbaik/admin/blog/create">새 포스트 작성</MudButton>
</section>

<div class="d-flex pa-4 gap-4 align-center">
    <MudTextField @bind-Value="searchQuery" Placeholder="블로그 제목 또는 본문 검색..." Adornment="Adornment.Start" 
                  AdornmentIcon="@Icons.Material.Filled.Search" IconSize="Size.Medium" Class="flex-grow-1" Immediate="true" Clearable="true" />
</div>

<MudPaper Class="admin-surface mb-4" Elevation="0">
    <MudStack Row="true" AlignItems="AlignItems.Center" Justify="Justify.SpaceBetween">
        <MudText Typo="Typo.subtitle1">@($"검색 결과 {FilteredPosts.Count()}개 / 전체 포스트 {totalPosts}개")</MudText>
        <MudText Typo="Typo.body2">페이지 @currentPage / @totalPages</MudText>
    </MudStack>
</MudPaper>

<MudDataGrid Items="@FilteredPosts" Striped="true" Hoverable="true" Loading="@isLoading" Class="admin-grid">
    <Columns>
        <PropertyColumn Property="x => x.Title" Title="제목" />
        <PropertyColumn Property="x => x.IsPublished" Title="발행">
            <CellTemplate Context="cell">
                <MudCheckBox T="bool" Value="@cell.Item.IsPublished"
                    ValueChanged="@(async (bool value) => await TogglePublish(cell.Item, value))" />
            </CellTemplate>
        </PropertyColumn>
        <PropertyColumn Property="x => x.ViewCount" Title="조회수" />
        <PropertyColumn Property="x => x.CreatedAt" Title="작성일" Format="yyyy-MM-dd" />
        <TemplateColumn>
            <CellTemplate Context="cell">
                <MudButton Variant="Variant.Outlined" Size="Size.Small" Color="Color.Primary"
                    Href="@($"/taxbaik/admin/blog/{cell.Item.Id}/edit")">수정하기</MudButton>
                <MudButton Variant="Variant.Text" Size="Size.Small" Color="Color.Error"
                    @onclick="@(async () => await DeletePost(cell.Item.Id))">삭제</MudButton>
            </CellTemplate>
        </TemplateColumn>
    </Columns>
</MudDataGrid>

<MudStack Row="true" Justify="Justify.Center" Class="mt-4" Spacing="2">
    <MudButton Variant="Variant.Outlined" Disabled="@(currentPage <= 1 || isLoading)" @onclick="PreviousPage">이전</MudButton>
    <MudButton Variant="Variant.Outlined" Disabled="@(currentPage >= totalPages || isLoading)" @onclick="NextPage">다음</MudButton>
</MudStack>

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

    private List<TaxBaik.Domain.Entities.BlogPost> posts = [];
    private string searchQuery = "";
    private bool isLoading = true;
    private int currentPage = 1;
    private int totalPages = 1;
    private int totalPosts = 0;
    private const int PageSize = 20;

    private IEnumerable<TaxBaik.Domain.Entities.BlogPost> FilteredPosts => posts?
        .Where(p => string.IsNullOrEmpty(searchQuery) || 
                    p.Title.Contains(searchQuery, StringComparison.OrdinalIgnoreCase) || 
                    (p.Content != null && p.Content.Contains(searchQuery, StringComparison.OrdinalIgnoreCase))) ?? Enumerable.Empty<TaxBaik.Domain.Entities.BlogPost>();

    protected override async Task OnAfterRenderAsync(bool firstRender)
    {
        if (firstRender)
        {
            if (AuthStateTask != null)
            {
                var authState = await AuthStateTask;
                if (authState.User.Identity?.IsAuthenticated == true)
                {
                    await LoadPosts();
                    StateHasChanged();
                }
            }
        }
    }

    private async Task LoadPosts()
    {
        isLoading = true;
        try
        {
            var result = await ApiClient.GetAsync<PagedBlogResponse>($"blog/admin?page={currentPage}&pageSize={PageSize}");
            posts = result?.Data ?? [];
            totalPosts = result?.Total ?? 0;
            totalPages = Math.Max(1, (int)Math.Ceiling(totalPosts / (double)PageSize));
        }
        catch
        {
            posts = [];
            totalPosts = 0;
            totalPages = 1;
        }
        isLoading = false;
    }

    private async Task PreviousPage()
    {
        if (currentPage <= 1)
            return;

        currentPage--;
        await LoadPosts();
    }

    private async Task NextPage()
    {
        if (currentPage >= totalPages)
            return;

        currentPage++;
        await LoadPosts();
    }

    private async Task TogglePublish(TaxBaik.Domain.Entities.BlogPost post, bool isPublished)
    {
        var previous = post.IsPublished;
        post.IsPublished = isPublished;
        var result = await ApiClient.PutAsync<TaxBaik.Domain.Entities.BlogPost>($"blog/{post.Id}", new
        {
            post.Title,
            post.Content,
            post.CategoryId,
            post.Tags,
            post.SeoTitle,
            post.SeoDescription,
            post.ThumbnailUrl,
            IsPublished = isPublished,
            post.AuthorId
        });

        if (result == null)
        {
            post.IsPublished = previous;
            Snackbar.Add("발행 상태 변경에 실패했습니다.", Severity.Error);
            return;
        }

        Snackbar.Add("발행 상태가 변경되었습니다.", Severity.Success);
    }

    private async Task DeletePost(int postId)
    {
        await ApiClient.DeleteAsync($"blog/{postId}");
        Snackbar.Add("포스트가 삭제되었습니다.", Severity.Success);
        await LoadPosts();
    }

    private class PagedBlogResponse
    {
        public List<TaxBaik.Domain.Entities.BlogPost> Data { get; set; } = [];
        public int Total { get; set; }
    }
}