@page "/admin/blog"
@attribute [Authorize]
@inject IApiClient ApiClient
@inject IJSRuntime JS

<PageTitle>블로그 관리</PageTitle>
<section class="admin-page-hero">
    <div>
        <div class="admin-eyebrow">Content</div>
        <h1 class="admin-page-title">블로그 관리</h1>
        <p class="admin-page-subtitle">검색 유입 콘텐츠의 발행 상태와 성과를 관리합니다.</p>
    </div>
    <button type="button" class="site-button primary" @onclick='() => NavTo("/taxbaik/admin/blog/create")'>새 포스트 작성</button>
</section>

<div class="admin-surface mb-4">
    <div class="admin-summary-bar">
        <span>전체 포스트: @($"{totalPosts}개")</span>
        <span>페이지 @currentPage / @totalPages</span>
    </div>
</div>

<div class="admin-surface">
    @if (isLoading)
    {
        <Skeleton Count="6" CssClass="taxbaik-skeleton-grid" />
    }
    else
    {
        <div class="admin-table-wrap">
            <table class="admin-table">
                <thead>
                    <tr>
                        <th>제목</th>
                        <th>발행</th>
                        <th>조회수</th>
                        <th>작성일</th>
                        <th></th>
                    </tr>
                </thead>
                <tbody>
                    @foreach (var post in posts)
                    {
                        <tr>
                            <td>@post.Title</td>
                            <td><label><input type="checkbox" checked="@post.IsPublished" @onchange="@(async e => await TogglePublish(post, (bool)e.Value!))" /> 발행</label></td>
                            <td>@post.ViewCount</td>
                            <td>@post.CreatedAt.ToString("yyyy-MM-dd")</td>
                            <td>
                                <div class="admin-row-actions">
                                    <a class="site-button secondary" href="@($"/taxbaik/admin/blog/{post.Id}/edit")">수정</a>
                                    <button type="button" class="admin-icon-button danger" @onclick="@(async () => await DeletePost(post.Id))">✕</button>
                                </div>
                            </td>
                        </tr>
                    }
                </tbody>
            </table>
        </div>
    }
</div>

<div class="admin-pagination">
    <button type="button" class="site-button secondary" disabled="@(currentPage <= 1 || isLoading)" @onclick="PreviousPage">이전</button>
    <button type="button" class="site-button secondary" disabled="@(currentPage >= totalPages || isLoading)" @onclick="NextPage">다음</button>
</div>

@code {
    [CascadingParameter] private Task<AuthenticationState>? AuthStateTask { get; set; }
    private List<TaxBaik.Domain.Entities.BlogPost> posts = [];
    private bool isLoading = true;
    private int currentPage = 1;
    private int totalPages = 1;
    private int totalPosts = 0;
    private const int PageSize = 20;

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

    private string NavTo(string url) => url;

    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;
        }
        finally
        {
            isLoading = false;
        }
    }

    private async Task PreviousPage() { if (currentPage > 1) { currentPage--; await LoadPosts(); } }
    private async Task NextPage() { if (currentPage < totalPages) { 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;
            await JS.InvokeVoidAsync("alert", "발행 상태 변경에 실패했습니다.");
            return;
        }
        await JS.InvokeVoidAsync("alert", "발행 상태가 변경되었습니다.");
    }

    private async Task DeletePost(int postId)
    {
        await ApiClient.DeleteAsync($"blog/{postId}");
        await JS.InvokeVoidAsync("alert", "포스트가 삭제되었습니다.");
        await LoadPosts();
    }

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