@page "/einkauf/verbindungen"
@using TrafagSalesExporter.Services
@inject IPurchasingDataSourcePageService DataSourceService
@inject TrafagSalesExporter.Services.IUiTextService UiText
@inject ISnackbar Snackbar

<PageTitle>@T("Einkauf Datenquellen", "Purchasing data sources")</PageTitle>

<MudText Typo="Typo.h4" Class="mb-1">@T("Einkauf Datenquellen", "Purchasing data sources")</MudText>
<MudText Typo="Typo.body2" Class="mb-4 purchasing-muted">
    @T("Grafische SAP/OData-Anbindung fuer das Einkaufsdashboard, analog zur Finance-Quellenpflege.",
       "Graphical SAP/OData connection for the purchasing dashboard, following the finance source configuration pattern.")
</MudText>

@if (_loading)
{
    <MudProgressLinear Indeterminate="true" />
}
else
{
    <MudGrid Spacing="2" Class="mb-4">
        <MudItem xs="12" md="7">
            <MudPaper Class="pa-3" Outlined="true">
                <MudText Typo="Typo.h6" Class="mb-3">@T("Verbindung", "Connection")</MudText>
                <MudGrid Spacing="2">
                    <MudItem xs="12" sm="6">
                        <MudTextField Value="_state.Site.TSC" Label="TSC" ReadOnly="true" />
                    </MudItem>
                    <MudItem xs="12" sm="6">
                        <MudTextField Value="_state.Site.SourceSystem" Label="@T("Quellsystem", "Source system")" ReadOnly="true" />
                    </MudItem>
                    <MudItem xs="12">
                        <MudTextField @bind-Value="_state.Site.SapServiceUrl"
                                      Label="SAP Service URL Override"
                                      HelperText="@T("Leer lassen = zentrale SAP OData URL aus Settings verwenden.", "Leave empty = use central SAP OData URL from settings.")" />
                    </MudItem>
                    <MudItem xs="12" sm="6">
                        <MudTextField @bind-Value="_state.Site.UsernameOverride"
                                      Label="Username Override"
                                      HelperText="@T("Leer lassen = zentraler SAP User.", "Leave empty = central SAP user.")" />
                    </MudItem>
                    <MudItem xs="12" sm="6">
                        <MudTextField @bind-Value="_state.Site.PasswordOverride"
                                      Label="Password Override"
                                      InputType="InputType.Password"
                                      HelperText="@T("Leer lassen = zentrales SAP Passwort.", "Leave empty = central SAP password.")" />
                    </MudItem>
                    <MudItem xs="12">
                        <MudCheckBox @bind-Value="_state.Site.IsActive"
                                     Label="@T("Einkaufsquelle fuer Import aktivieren", "Activate purchasing source for import")" />
                    </MudItem>
                </MudGrid>
                <MudStack Row="true" Spacing="2" Class="mt-3">
                    <MudButton Variant="Variant.Filled" Color="Color.Primary" StartIcon="@Icons.Material.Filled.Save" OnClick="SaveAsync" Disabled="_busy">
                        @T("Speichern", "Save")
                    </MudButton>
                    <MudButton Variant="Variant.Outlined" Color="Color.Info" StartIcon="@Icons.Material.Filled.NetworkCheck" OnClick="TestConnectionAsync" Disabled="_busy">
                        @T("Verbindung testen", "Test connection")
                    </MudButton>
                    <MudButton Variant="Variant.Outlined" StartIcon="@Icons.Material.Filled.Restore" OnClick="ResetDefaultsAsync" Disabled="_busy">
                        @T("Defaults wiederherstellen", "Restore defaults")
                    </MudButton>
                </MudStack>
            </MudPaper>
        </MudItem>
        <MudItem xs="12" md="5">
            <MudPaper Class="pa-3" Outlined="true">
                <MudText Typo="Typo.h6" Class="mb-2">@T("Aktuelle Basis", "Current basis")</MudText>
                <div class="purchasing-source-row">
                    <MudIcon Icon="@Icons.Material.Filled.CloudQueue" Size="Size.Small" />
                    <span>@T("Zentrale URL", "Central URL"): <code>@Display(_state.SourceSystem?.CentralServiceUrl)</code></span>
                </div>
                <div class="purchasing-source-row">
                    <MudIcon Icon="@Icons.Material.Filled.TableChart" Size="Size.Small" />
                    <span>@T("Quellen", "Sources"): @_state.Sources.Count(x => x.IsActive)</span>
                </div>
                <div class="purchasing-source-row">
                    <MudIcon Icon="@Icons.Material.Filled.AccountTree" Size="Size.Small" />
                    <span>@T("Joins", "Joins"): @_state.Joins.Count(x => x.IsActive)</span>
                </div>
                <div class="purchasing-source-row">
                    <MudIcon Icon="@Icons.Material.Filled.Schema" Size="Size.Small" />
                    <span>@T("Mappings", "Mappings"): @_state.Mappings.Count(x => x.IsActive)</span>
                </div>
            </MudPaper>
        </MudItem>
    </MudGrid>

    <MudTabs Elevation="1" Rounded="false" PanelClass="pt-4">
        <MudTabPanel Text="@T("Quellen", "Sources")" Icon="@Icons.Material.Filled.Hub">
            <MudStack Row="true" Justify="Justify.SpaceBetween" AlignItems="AlignItems.Center" Class="mb-2">
                <MudText Typo="Typo.h6">@T("OData Entity Sets", "OData entity sets")</MudText>
                <MudButton Variant="Variant.Outlined" StartIcon="@Icons.Material.Filled.Add" OnClick="AddSource">@T("Quelle", "Source")</MudButton>
            </MudStack>
            <MudTable Items="_state.Sources" Dense="true" Hover="true" Striped="true">
                <HeaderContent>
                    <MudTh>Alias</MudTh>
                    <MudTh>Entity Set</MudTh>
                    <MudTh>@T("Primaer", "Primary")</MudTh>
                    <MudTh>@T("Aktiv", "Active")</MudTh>
                    <MudTh></MudTh>
                </HeaderContent>
                <RowTemplate>
                    <MudTd><MudTextField @bind-Value="context.Alias" Dense="true" /></MudTd>
                    <MudTd><MudTextField @bind-Value="context.EntitySet" Dense="true" /></MudTd>
                    <MudTd><MudCheckBox @bind-Value="context.IsPrimary" Dense="true" /></MudTd>
                    <MudTd><MudCheckBox @bind-Value="context.IsActive" Dense="true" /></MudTd>
                    <MudTd><MudIconButton Icon="@Icons.Material.Filled.Delete" Color="Color.Error" Size="Size.Small" OnClick="() => RemoveSource(context)" /></MudTd>
                </RowTemplate>
            </MudTable>
        </MudTabPanel>

        <MudTabPanel Text="@T("Join-Fluss", "Join flow")" Icon="@Icons.Material.Filled.AccountTree">
            <MudGrid Spacing="2" Class="mb-3">
                @foreach (var join in _state.Joins.Where(x => x.IsActive))
                {
                    <MudItem xs="12" sm="6" lg="3">
                        <MudPaper Class="pa-3 purchasing-flow" Outlined="true">
                            <MudText Typo="Typo.subtitle2">@join.LeftAlias -> @join.RightAlias</MudText>
                            <MudText Typo="Typo.caption">@join.LeftKeys = @join.RightKeys</MudText>
                        </MudPaper>
                    </MudItem>
                }
            </MudGrid>
            <MudStack Row="true" Justify="Justify.SpaceBetween" AlignItems="AlignItems.Center" Class="mb-2">
                <MudText Typo="Typo.h6">@T("Joins", "Joins")</MudText>
                <MudButton Variant="Variant.Outlined" StartIcon="@Icons.Material.Filled.Add" OnClick="AddJoin">@T("Join", "Join")</MudButton>
            </MudStack>
            <MudTable Items="_state.Joins" Dense="true" Hover="true" Striped="true">
                <HeaderContent>
                    <MudTh>@T("Links", "Left")</MudTh>
                    <MudTh>Left Keys</MudTh>
                    <MudTh>@T("Rechts", "Right")</MudTh>
                    <MudTh>Right Keys</MudTh>
                    <MudTh>@T("Typ", "Type")</MudTh>
                    <MudTh>@T("Aktiv", "Active")</MudTh>
                    <MudTh></MudTh>
                </HeaderContent>
                <RowTemplate>
                    <MudTd><MudTextField @bind-Value="context.LeftAlias" Dense="true" /></MudTd>
                    <MudTd><MudTextField @bind-Value="context.LeftKeys" Dense="true" /></MudTd>
                    <MudTd><MudTextField @bind-Value="context.RightAlias" Dense="true" /></MudTd>
                    <MudTd><MudTextField @bind-Value="context.RightKeys" Dense="true" /></MudTd>
                    <MudTd><MudTextField @bind-Value="context.JoinType" Dense="true" /></MudTd>
                    <MudTd><MudCheckBox @bind-Value="context.IsActive" Dense="true" /></MudTd>
                    <MudTd><MudIconButton Icon="@Icons.Material.Filled.Delete" Color="Color.Error" Size="Size.Small" OnClick="() => RemoveJoin(context)" /></MudTd>
                </RowTemplate>
            </MudTable>
        </MudTabPanel>

        <MudTabPanel Text="@T("Mapping", "Mapping")" Icon="@Icons.Material.Filled.Schema">
            <MudStack Row="true" Justify="Justify.SpaceBetween" AlignItems="AlignItems.Center" Class="mb-2">
                <MudText Typo="Typo.h6">@T("Zielfelder", "Target fields")</MudText>
                <MudButton Variant="Variant.Outlined" StartIcon="@Icons.Material.Filled.Add" OnClick="AddMapping">@T("Mapping", "Mapping")</MudButton>
            </MudStack>
            <MudTable Items="_state.Mappings" Dense="true" Hover="true" Striped="true">
                <HeaderContent>
                    <MudTh>@T("Ziel", "Target")</MudTh>
                    <MudTh>@T("Quelle", "Source")</MudTh>
                    <MudTh>@T("Pflicht", "Required")</MudTh>
                    <MudTh>@T("Aktiv", "Active")</MudTh>
                    <MudTh></MudTh>
                </HeaderContent>
                <RowTemplate>
                    <MudTd><MudTextField @bind-Value="context.TargetField" Dense="true" /></MudTd>
                    <MudTd><MudTextField @bind-Value="context.SourceExpression" Dense="true" /></MudTd>
                    <MudTd><MudCheckBox @bind-Value="context.IsRequired" Dense="true" /></MudTd>
                    <MudTd><MudCheckBox @bind-Value="context.IsActive" Dense="true" /></MudTd>
                    <MudTd><MudIconButton Icon="@Icons.Material.Filled.Delete" Color="Color.Error" Size="Size.Small" OnClick="() => RemoveMapping(context)" /></MudTd>
                </RowTemplate>
            </MudTable>
        </MudTabPanel>
    </MudTabs>
}

@code {
    private PurchasingDataSourceState _state = new();
    private bool _loading = true;
    private bool _busy;

    protected override async Task OnInitializedAsync()
    {
        _state = await DataSourceService.LoadAsync();
        _loading = false;
    }

    private async Task SaveAsync()
    {
        await RunAsync(async () =>
        {
            _state = await DataSourceService.SaveAsync(_state);
            Snackbar.Add(T("Einkaufsdatenquellen gespeichert.", "Purchasing data sources saved."), Severity.Success);
        });
    }

    private async Task ResetDefaultsAsync()
    {
        await RunAsync(async () =>
        {
            _state = await DataSourceService.ResetDefaultsAsync();
            Snackbar.Add(T("Einkaufsdatenquellen auf Defaults gesetzt.", "Purchasing data sources restored to defaults."), Severity.Info);
        });
    }

    private async Task TestConnectionAsync()
    {
        await RunAsync(async () =>
        {
            var result = await DataSourceService.TestConnectionAsync(_state);
            Snackbar.Add(result.Message, result.Success ? Severity.Success : result.Warning ? Severity.Warning : Severity.Error);
        });
    }

    private async Task RunAsync(Func<Task> action)
    {
        if (_busy)
            return;

        _busy = true;
        try
        {
            await action();
        }
        catch (Exception ex)
        {
            Snackbar.Add(ex.Message, Severity.Error);
        }
        finally
        {
            _busy = false;
        }
    }

    private void AddSource()
        => _state.Sources.Add(new SapSourceDefinition { Alias = "NEW", EntitySet = "NewEntitySet", IsActive = true, SortOrder = (_state.Sources.Count + 1) * 10 });

    private void AddJoin()
        => _state.Joins.Add(new SapJoinDefinition { LeftAlias = "EKKO", RightAlias = "NEW", LeftKeys = "Key", RightKeys = "Key", JoinType = "Left", IsActive = true, SortOrder = (_state.Joins.Count + 1) * 10 });

    private void AddMapping()
        => _state.Mappings.Add(new SapFieldMapping { TargetField = "NewField", SourceExpression = "Alias.Field", IsActive = true, SortOrder = (_state.Mappings.Count + 1) * 10 });

    private void RemoveSource(SapSourceDefinition source) => _state.Sources.Remove(source);
    private void RemoveJoin(SapJoinDefinition join) => _state.Joins.Remove(join);
    private void RemoveMapping(SapFieldMapping mapping) => _state.Mappings.Remove(mapping);

    private string T(string german, string english) => UiText.Text(german, english);
    private static string Display(string? value) => string.IsNullOrWhiteSpace(value) ? "-" : value;
}

<style>
    .purchasing-muted {
        color: var(--mud-palette-text-secondary);
    }

    .purchasing-flow {
        min-height: 86px;
    }

    .purchasing-source-row {
        display: grid;
        grid-template-columns: 26px minmax(0, 1fr);
        align-items: center;
        gap: 8px;
        padding: 7px 0;
        border-bottom: 1px solid var(--mud-palette-lines-default);
    }

    .purchasing-source-row:last-child {
        border-bottom: 0;
    }
</style>