@page "/design/external-systems"
@using ZB.MOM.WW.ScadaBridge.Security
@using ZB.MOM.WW.ScadaBridge.Commons.Entities.ExternalSystems
@using ZB.MOM.WW.ScadaBridge.Commons.Entities.InboundApi
@using ZB.MOM.WW.ScadaBridge.Commons.Interfaces.Repositories
@attribute [Authorize(Policy = AuthorizationPolicies.RequireDesign)]
@inject IExternalSystemRepository ExternalSystemRepository
@inject IInboundApiRepository InboundApiRepository
@inject NavigationManager NavigationManager
@inject IDialogService Dialog

<div class="container-fluid mt-3">
    <div class="d-flex justify-content-between align-items-center mb-3">
        <h4 class="mb-0">Integration Definitions</h4>
    </div>

    <ToastNotification @ref="_toast" />

    @if (_loading)
    {
        <LoadingSpinner IsLoading="true" />
    }
    else if (_errorMessage != null)
    {
        <div class="alert alert-danger">@_errorMessage</div>
    }
    else
    {
        <ul class="nav nav-tabs mb-3" role="tablist">
            <li class="nav-item" role="presentation">
                <button class="nav-link @(_tab == "extsys" ? "active" : "")"
                        role="tab"
                        aria-selected="@(_tab == "extsys" ? "true" : "false")"
                        aria-controls="int-tab-extsys"
                        @onclick='() => _tab = "extsys"'>
                    External Systems <span class="badge bg-secondary">@_externalSystems.Count</span>
                </button>
            </li>
            <li class="nav-item" role="presentation">
                <button class="nav-link @(_tab == "dbconn" ? "active" : "")"
                        role="tab"
                        aria-selected="@(_tab == "dbconn" ? "true" : "false")"
                        aria-controls="int-tab-dbconn"
                        @onclick='() => _tab = "dbconn"'>
                    Database Connections <span class="badge bg-secondary">@_dbConnections.Count</span>
                </button>
            </li>
            <li class="nav-item" role="presentation">
                <button class="nav-link @(_tab == "inbound" ? "active" : "")"
                        role="tab"
                        aria-selected="@(_tab == "inbound" ? "true" : "false")"
                        aria-controls="int-tab-inbound"
                        @onclick='() => _tab = "inbound"'>
                    Inbound API Methods <span class="badge bg-secondary">@_apiMethods.Count</span>
                </button>
            </li>
        </ul>

        @if (_tab == "extsys")
        {
            <div role="tabpanel" id="int-tab-extsys">@RenderExternalSystems()</div>
        }
        else if (_tab == "dbconn")
        {
            <div role="tabpanel" id="int-tab-dbconn">@RenderDbConnections()</div>
        }
        else if (_tab == "inbound")
        {
            <div role="tabpanel" id="int-tab-inbound">@RenderInboundApiMethods()</div>
        }
    }
</div>

@code {
    private bool _loading = true;
    private string? _errorMessage;
    private string _tab = "extsys";

    // External Systems
    private List<ExternalSystemDefinition> _externalSystems = new();
    private string _extsysSearch = "";
    private IEnumerable<ExternalSystemDefinition> FilteredExternalSystems =>
        string.IsNullOrWhiteSpace(_extsysSearch)
            ? _externalSystems
            : _externalSystems.Where(es => es.Name?.Contains(_extsysSearch, StringComparison.OrdinalIgnoreCase) ?? false);

    // Database Connections
    private List<DatabaseConnectionDefinition> _dbConnections = new();
    private string _dbConnSearch = "";
    private IEnumerable<DatabaseConnectionDefinition> FilteredDbConnections =>
        string.IsNullOrWhiteSpace(_dbConnSearch)
            ? _dbConnections
            : _dbConnections.Where(dc => dc.Name?.Contains(_dbConnSearch, StringComparison.OrdinalIgnoreCase) ?? false);

    // Inbound API Methods
    private List<ApiMethod> _apiMethods = new();
    private string _apiMethodSearch = "";
    private IEnumerable<ApiMethod> FilteredApiMethods =>
        string.IsNullOrWhiteSpace(_apiMethodSearch)
            ? _apiMethods
            : _apiMethods.Where(m => m.Name?.Contains(_apiMethodSearch, StringComparison.OrdinalIgnoreCase) ?? false);

    private ToastNotification _toast = default!;

    protected override async Task OnInitializedAsync()
    {
        await LoadAllAsync();
    }

    private async Task LoadAllAsync()
    {
        _loading = true;
        try
        {
            _externalSystems = (await ExternalSystemRepository.GetAllExternalSystemsAsync()).ToList();
            _dbConnections = (await ExternalSystemRepository.GetAllDatabaseConnectionsAsync()).ToList();
            _apiMethods = (await InboundApiRepository.GetAllApiMethodsAsync()).ToList();
        }
        catch (Exception ex) { _errorMessage = ex.Message; }
        _loading = false;
    }

    // ==== External Systems ====
    private RenderFragment RenderExternalSystems() => __builder =>
    {
        <div class="d-flex justify-content-between align-items-center mb-2">
            <h5 class="mb-0">External Systems</h5>
            <button class="btn btn-primary btn-sm" @onclick='() => NavigationManager.NavigateTo("/design/external-systems/create")'>Add External System</button>
        </div>

        @if (_externalSystems.Count == 0)
        {
            <div class="text-center py-5 text-muted">
                <p class="mb-3">No external systems configured.</p>
                <button class="btn btn-primary btn-sm"
                        @onclick='() => NavigationManager.NavigateTo("/design/external-systems/create")'>
                    Add your first external system
                </button>
            </div>
        }
        else
        {
            <div class="mb-3" style="max-width: 320px;">
                <input class="form-control form-control-sm"
                       placeholder="Filter by name…"
                       @bind="_extsysSearch" @bind:event="oninput" />
            </div>

            @if (!FilteredExternalSystems.Any())
            {
                <p class="text-muted small">No external systems match the filter.</p>
            }

            <div class="row g-3">
                @foreach (var es in FilteredExternalSystems)
                {
                    <div class="col-lg-6 col-12" @key="es.Id">
                        <div class="card h-100">
                            <div class="card-body">
                                <div class="d-flex justify-content-between align-items-start mb-2">
                                    <h5 class="card-title mb-0">@es.Name</h5>
                                    <div class="d-flex gap-1">
                                        <button class="btn btn-outline-primary btn-sm" @onclick='() => NavigationManager.NavigateTo($"/design/external-systems/{es.Id}/edit")'>Edit</button>
                                        <div class="dropdown">
                                            <button class="btn btn-outline-secondary btn-sm"
                                                    data-bs-toggle="dropdown"
                                                    aria-expanded="false"
                                                    aria-label="@($"More actions for {es.Name}")">⋮</button>
                                            <ul class="dropdown-menu dropdown-menu-end">
                                                <li><button class="dropdown-item text-danger" @onclick="() => DeleteExtSys(es)">Delete</button></li>
                                            </ul>
                                        </div>
                                    </div>
                                </div>
                                <p class="small text-muted text-truncate mb-1" title="@es.EndpointUrl">@es.EndpointUrl</p>
                                <div>
                                    <span class="badge bg-secondary me-1">@es.AuthType</span>
                                    <span class="badge bg-light text-dark me-1">Max @es.MaxRetries retries</span>
                                    <span class="badge bg-light text-dark">Delay @es.RetryDelay.TotalSeconds s</span>
                                </div>
                            </div>
                        </div>
                    </div>
                }
            </div>
        }
    };

    private async Task DeleteExtSys(ExternalSystemDefinition es)
    {
        if (!await Dialog.ConfirmAsync("Delete External System", $"Delete '{es.Name}'?", danger: true)) return;
        try { await ExternalSystemRepository.DeleteExternalSystemAsync(es.Id); await ExternalSystemRepository.SaveChangesAsync(); _toast.ShowSuccess("Deleted."); await LoadAllAsync(); }
        catch (Exception ex) { _toast.ShowError(ex.Message); }
    }

    // ==== Database Connections ====
    private RenderFragment RenderDbConnections() => __builder =>
    {
        <div class="d-flex justify-content-between align-items-center mb-2">
            <h5 class="mb-0">Database Connections</h5>
            <button class="btn btn-primary btn-sm" @onclick='() => NavigationManager.NavigateTo("/design/db-connections/create")'>Add Database Connection</button>
        </div>

        @if (_dbConnections.Count == 0)
        {
            <div class="text-center py-5 text-muted">
                <p class="mb-3">No database connections configured.</p>
                <button class="btn btn-primary btn-sm"
                        @onclick='() => NavigationManager.NavigateTo("/design/db-connections/create")'>
                    Add your first database connection
                </button>
            </div>
        }
        else
        {
            <div class="mb-3" style="max-width: 320px;">
                <input class="form-control form-control-sm"
                       placeholder="Filter by name…"
                       @bind="_dbConnSearch" @bind:event="oninput" />
            </div>

            @if (!FilteredDbConnections.Any())
            {
                <p class="text-muted small">No database connections match the filter.</p>
            }

            <div class="row g-3">
                @foreach (var dc in FilteredDbConnections)
                {
                    <div class="col-lg-6 col-12" @key="dc.Id">
                        <div class="card h-100">
                            <div class="card-body">
                                <div class="d-flex justify-content-between align-items-start mb-2">
                                    <h5 class="card-title mb-0">@dc.Name</h5>
                                    <div class="d-flex gap-1">
                                        <button class="btn btn-outline-primary btn-sm" @onclick='() => NavigationManager.NavigateTo($"/design/db-connections/{dc.Id}/edit")'>Edit</button>
                                        <div class="dropdown">
                                            <button class="btn btn-outline-secondary btn-sm"
                                                    data-bs-toggle="dropdown"
                                                    aria-expanded="false"
                                                    aria-label="@($"More actions for {dc.Name}")">⋮</button>
                                            <ul class="dropdown-menu dropdown-menu-end">
                                                <li><button class="dropdown-item text-danger" @onclick="() => DeleteDbConn(dc)">Delete</button></li>
                                            </ul>
                                        </div>
                                    </div>
                                </div>
                                @* Connection strings carry credentials — never rendered here (not even for admins). Shown only on the create/edit form. *@
                                <p class="small text-muted fst-italic mb-1">Connection string hidden — edit to view</p>
                                <div>
                                    <span class="badge bg-light text-dark me-1">Max @dc.MaxRetries retries</span>
                                    <span class="badge bg-light text-dark">Delay @dc.RetryDelay.TotalSeconds s</span>
                                </div>
                            </div>
                        </div>
                    </div>
                }
            </div>
        }
    };

    private async Task DeleteDbConn(DatabaseConnectionDefinition dc)
    {
        if (!await Dialog.ConfirmAsync("Delete DB Connection", $"Delete '{dc.Name}'?", danger: true)) return;
        try { await ExternalSystemRepository.DeleteDatabaseConnectionAsync(dc.Id); await ExternalSystemRepository.SaveChangesAsync(); _toast.ShowSuccess("Deleted."); await LoadAllAsync(); }
        catch (Exception ex) { _toast.ShowError(ex.Message); }
    }

    // ==== Inbound API Methods ====
    private RenderFragment RenderInboundApiMethods() => __builder =>
    {
        <div class="d-flex justify-content-between align-items-center mb-2">
            <h5 class="mb-0">Inbound API Methods</h5>
            <button class="btn btn-primary btn-sm" @onclick='() => NavigationManager.NavigateTo("/design/api-methods/create")'>Add API Method</button>
        </div>

        @if (_apiMethods.Count == 0)
        {
            <div class="text-center py-5 text-muted">
                <p class="mb-3">No API methods configured.</p>
                <button class="btn btn-primary btn-sm"
                        @onclick='() => NavigationManager.NavigateTo("/design/api-methods/create")'>
                    Add your first API method
                </button>
            </div>
        }
        else
        {
            <div class="mb-3" style="max-width: 320px;">
                <input class="form-control form-control-sm"
                       placeholder="Filter by name…"
                       @bind="_apiMethodSearch" @bind:event="oninput" />
            </div>

            @if (!FilteredApiMethods.Any())
            {
                <p class="text-muted small">No API methods match the filter.</p>
            }

            <div class="row g-3">
                @foreach (var m in FilteredApiMethods)
                {
                    var preview = m.Script.Length > 80 ? m.Script[..80] + "…" : m.Script;
                    <div class="col-lg-6 col-12" @key="m.Id">
                        <div class="card h-100">
                            <div class="card-body">
                                <div class="d-flex justify-content-between align-items-start mb-2">
                                    <div>
                                        <h5 class="card-title mb-1">@m.Name</h5>
                                        <code class="small">POST /api/@m.Name</code>
                                    </div>
                                    <div class="d-flex gap-1">
                                        <button class="btn btn-outline-primary btn-sm" @onclick='() => NavigationManager.NavigateTo($"/design/api-methods/{m.Id}/edit")'>Edit</button>
                                        <div class="dropdown">
                                            <button class="btn btn-outline-secondary btn-sm"
                                                    data-bs-toggle="dropdown"
                                                    aria-expanded="false"
                                                    aria-label="@($"More actions for {m.Name}")">⋮</button>
                                            <ul class="dropdown-menu dropdown-menu-end">
                                                <li><button class="dropdown-item text-danger" @onclick="() => DeleteApiMethod(m)">Delete</button></li>
                                            </ul>
                                        </div>
                                    </div>
                                </div>
                                <pre class="small text-muted font-monospace mb-2"
                                     style="white-space: pre-wrap; word-break: break-all;"
                                     title="@m.Script">@preview</pre>
                                <span class="badge bg-light text-dark">Timeout @m.TimeoutSeconds s</span>
                            </div>
                        </div>
                    </div>
                }
            </div>
        }
    };

    private async Task DeleteApiMethod(ApiMethod m)
    {
        if (!await Dialog.ConfirmAsync("Delete", $"Delete API method '{m.Name}'?", danger: true)) return;
        try { await InboundApiRepository.DeleteApiMethodAsync(m.Id); await InboundApiRepository.SaveChangesAsync(); _toast.ShowSuccess("Deleted."); await LoadAllAsync(); }
        catch (Exception ex) { _toast.ShowError(ex.Message); }
    }

}