@page "/applications"
@rendermode @(new InteractiveServerRenderMode())
@inject Services.ApiClientService ApiClient
@inject IJSRuntime JSRuntime

<PageTitle>内容管理 - DRS9 信息发布系统</PageTitle>

<h3 class="mb-4">内容管理</h3>

<div class="card">
    <div class="card-header d-flex justify-content-between align-items-center">
        <span><i class="bi bi-grid"></i> 内容列表</span>
        <button class="btn btn-primary btn-sm" @onclick="ShowAddModal">
            <i class="bi bi-plus-lg"></i> 添加内容
        </button>
    </div>
    <div class="card-body">
        @if (_applications == null)
        {
            <div class="text-center py-4">
                <div class="spinner-border text-primary" role="status"></div>
            </div>
        }
        else if (_applications.Count == 0)
        {
            <div class="text-center text-muted py-4">
                <i class="bi bi-inbox fs-1 d-block mb-3"></i>
                <p>暂无内容，点击上方按钮添加</p>
            </div>
        }
        else
        {
            <div class="row">
                @foreach (var app in _applications)
                {
                    <div class="col-md-4 mb-3">
                        <div class="card h-100">
                            <div class="card-body">
                                <div class="d-flex align-items-start">
                                    <div class="content-icon @GetAppTypeClass(app.Type)">
                                        <i class="bi @GetAppIcon(app.Type)"></i>
                                    </div>
                                    <div class="flex-grow-1">
                                        <h6 class="mb-1">@app.Name</h6>
                                        <p class="text-muted mb-2 small">@app.Type</p>
                                        <p class="mb-2 small">@app.Description</p>
                                    </div>
                                </div>
                            </div>
                            <div class="card-footer d-flex justify-content-end gap-2">
                                <button class="btn btn-sm btn-outline-primary" @onclick="@(() => EditApp(app))">
                                    <i class="bi bi-pencil"></i> 编辑
                                </button>
                                <button class="btn btn-sm btn-outline-danger" @onclick="@(() => DeleteApp(app))">
                                    <i class="bi bi-trash"></i> 删除
                                </button>
                            </div>
                        </div>
                    </div>
                }
            </div>
        }
    </div>
</div>

<!-- 添加/编辑 Modal -->
@if (_showModal)
{
    <div class="modal fade show d-block" style="background-color: rgba(0,0,0,0.5)" tabindex="-1" @onclick="CloseModal">
        <div class="modal-dialog" @onclick:stopPropagation="true">
            <div class="modal-content">
                <div class="modal-header">
                    <h5 class="modal-title">@(_editingApp?.Id == null ? "添加内容" : "编辑内容")</h5>
                    <button type="button" class="btn-close" @onclick="CloseModal"></button>
                </div>
                <div class="modal-body">
                    @if (!string.IsNullOrEmpty(_errorMessage))
                    {
                        <div class="alert alert-danger" role="alert">
                            @_errorMessage
                        </div>
                    }
                    <div class="mb-3">
                        <label class="form-label">内容名称</label>
                        <input type="text" class="form-control" @bind="_appName" />
                    </div>
                    <div class="mb-3">
                        <label class="form-label">内容类型</label>
                        <select class="form-select" @bind="_appType" disabled="@(_editingApp != null)">
                            <option value="">请选择...</option>
                            <option value="Dashboard">Dashboard</option>
                            <option value="WebRotator">WebRotator</option>
                            <option value="Image">Image</option>
                            <option value="Video">Video</option>
                        </select>
                        @if (_editingApp != null)
                        {
                            <small class="text-muted">内容类型创建后不可修改</small>
                        }
                    </div>
                    <div class="mb-3">
                        <label class="form-label">内容 URL</label>
                        <input type="url" class="form-control" @bind="_appContentUrl" placeholder="https://..." />
                    </div>
                    <div class="mb-3">
                        <label class="form-label">描述</label>
                        <textarea class="form-control" @bind="_appDescription" rows="3"></textarea>
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-secondary" @onclick="CloseModal">取消</button>
                    <button type="button" class="btn btn-primary" @onclick="SaveApp">保存</button>
                </div>
            </div>
        </div>
    </div>
}

@code {
    private List<ApplicationDto> _applications = new();
    private ApplicationDto? _editingApp;
    private string _appName = "";
    private string _appType = "";
    private string _appContentUrl = "";
    private string _appDescription = "";
    private bool _showModal = false;
    private string _errorMessage = "";

    protected override async Task OnInitializedAsync()
    {
        _applications = await ApiClient.GetApplicationsAsync();
    }

    private void ShowAddModal()
    {
        _editingApp = null;
        _appName = "";
        _appType = "";
        _appContentUrl = "";
        _appDescription = "";
        _errorMessage = "";
        _showModal = true;
    }

    private void EditApp(ApplicationDto app)
    {
        _editingApp = app;
        _appName = app.Name;
        _appType = app.Type;
        _appContentUrl = app.ContentUrl;
        _appDescription = app.Description ?? "";
        _errorMessage = "";
        _showModal = true;
    }

    private void CloseModal()
    {
        _showModal = false;
        _editingApp = null;
        _errorMessage = "";
    }

    private async Task SaveApp()
    {
        // Validate inputs
        if (string.IsNullOrWhiteSpace(_appName))
        {
            _errorMessage = "请输入内容名称";
            return;
        }
        if (string.IsNullOrWhiteSpace(_appType))
        {
            _errorMessage = "请选择内容类型";
            return;
        }
        if (string.IsNullOrWhiteSpace(_appContentUrl))
        {
            _errorMessage = "请输入内容 URL";
            return;
        }

        bool success;
        if (_editingApp == null)
        {
            success = await ApiClient.CreateApplicationAsync(new ApplicationCreateRequest
            {
                Name = _appName,
                Type = _appType,
                ContentUrl = _appContentUrl,
                Description = _appDescription
            });
        }
        else
        {
            success = await ApiClient.UpdateApplicationAsync(_editingApp.Id, new ApplicationUpdateRequest
            {
                Name = _appName,
                Description = _appDescription,
                ContentUrl = _appContentUrl
            });
        }

        if (success)
        {
            CloseModal();
            _applications = await ApiClient.GetApplicationsAsync();
            await JSRuntime.InvokeVoidAsync("alert", "保存成功");
        }
        else
        {
            _errorMessage = "保存失败，请检查输入数据或稍后重试";
        }
    }

    private async Task DeleteApp(ApplicationDto app)
    {
        if (await JSRuntime.InvokeAsync<bool>("confirm", $"确定要删除内容 '{app.Name}' 吗？"))
        {
            var success = await ApiClient.DeleteApplicationAsync(app.Id);
            if (success)
            {
                _applications = await ApiClient.GetApplicationsAsync();
                await JSRuntime.InvokeVoidAsync("alert", "删除成功");
            }
            else
            {
                await JSRuntime.InvokeVoidAsync("alert", "删除失败");
            }
        }
    }

    private string GetAppTypeClass(string type) => type switch
    {
        "Dashboard" => "dashboard",
        "WebRotator" => "web",
        "Image" => "image",
        "Video" => "video",
        _ => ""
    };

    private string GetAppIcon(string type) => type switch
    {
        "Dashboard" => "bi-bar-chart",
        "WebRotator" => "bi-arrow-repeat",
        "Image" => "bi-image",
        "Video" => "bi-play-circle",
        _ => "bi-file-earmark"
    };
}