@using Indotalent.Features.Leave.LeaveRequest
@using Indotalent.Features.Leave.LeaveRequest.Cqrs
@using Indotalent.Features.Leave.LeaveCategory
@using Indotalent.Features.Leave.LeaveCategory.Cqrs
@using Indotalent.Shared.Utils
@using MudBlazor
@inject LeaveRequestService LeaveRequestService
@inject LeaveCategoryService LeaveCategoryService
@inject ISnackbar Snackbar

<MudPaper Elevation="0" Square="true" Class="pa-6 mb-3 d-flex align-center justify-space-between" Style="border: 1px solid #DCEBFA;">
    <div class="d-flex align-center gap-4">
        <MudIconButton Icon="@Icons.Material.Filled.ArrowBack" OnClick="() => OnCancel.InvokeAsync()" />
        <div>
            <MudText Typo="Typo.h5" Style="font-weight: 900; color: #1a1a1a;">Apply for Leave</MudText>
            <MudText Typo="Typo.body2" Style="color: #64748b;">Submit a new leave application for approval.</MudText>
        </div>
    </div>
</MudPaper>

<MudPaper Elevation="0" Outlined="true" Class="pa-8" Style="border-radius: 0px; border: 1px solid #DCEBFA;">
    <MudForm @ref="_form" Model="_model">
        <MudGrid Spacing="3">
            <MudItem xs="12" sm="6">
                <MudText Typo="Typo.subtitle2" Class="mb-1">Select Employee</MudText>
                <MudSelect T="string" @bind-Value="_model.EmployeeId"
                           For="@(() => _model.EmployeeId)"
                           Validation="@(_validator.ValidateValue())"
                           Variant="Variant.Outlined" Margin="Margin.Dense"
                           AnchorOrigin="Origin.BottomLeft" TransformOrigin="Origin.TopLeft">
                    @foreach (var emp in _employees)
                    {
                        <MudSelectItem Value="@emp.Id">@emp.FullName (@emp.Code)</MudSelectItem>
                    }
                </MudSelect>
            </MudItem>
            <MudItem xs="12" sm="6">
                <MudText Typo="Typo.subtitle2" Class="mb-1">Leave Type</MudText>
                <MudSelect T="string" @bind-Value="_model.LeaveCategoryId"
                           For="@(() => _model.LeaveCategoryId)"
                           Validation="@(_validator.ValidateValue())"
                           Variant="Variant.Outlined" Margin="Margin.Dense"
                           AnchorOrigin="Origin.BottomLeft" TransformOrigin="Origin.TopLeft">
                    @foreach (var cat in _categories)
                    {
                        <MudSelectItem Value="@cat.Id">@cat.Name</MudSelectItem>
                    }
                </MudSelect>
            </MudItem>
            <MudItem xs="12" sm="3">
                <MudText Typo="Typo.subtitle2" Class="mb-1">Start Date</MudText>
                <MudDatePicker @bind-Date="_startDate" Variant="Variant.Outlined" Margin="Margin.Dense" Editable="true" />
            </MudItem>
            <MudItem xs="12" sm="3">
                <MudText Typo="Typo.subtitle2" Class="mb-1">End Date</MudText>
                <MudDatePicker @bind-Date="_endDate" Variant="Variant.Outlined" Margin="Margin.Dense" Editable="true" />
            </MudItem>
            <MudItem xs="12" sm="6">
                <MudText Typo="Typo.subtitle2" Class="mb-1">Total Days</MudText>
                <MudNumericField @bind-Value="_model.Days" Variant="Variant.Outlined" Margin="Margin.Dense" FullWidth="true" ReadOnly="true" />
            </MudItem>
            <MudItem xs="12">
                <MudText Typo="Typo.subtitle2" Class="mb-1">Reason</MudText>
                <MudTextField @bind-Value="_model.Reason"
                              For="@(() => _model.Reason)"
                              Validation="@(_validator.ValidateValue())"
                              Variant="Variant.Outlined" Margin="Margin.Dense" FullWidth="true" Lines="3" />
            </MudItem>
        </MudGrid>

        <div class="d-flex justify-end gap-2 mt-8">
            <MudButton OnClick="() => OnCancel.InvokeAsync()" Variant="Variant.Outlined" Disabled="_processing" Style="border: 1px solid #e0e0e0; border-radius: 4px; text-transform: none; font-weight: 700;">Cancel</MudButton>
            <MudButton Color="Color.Primary" Variant="Variant.Filled" OnClick="Submit" Disabled="_processing" Style="border-radius: 4px; text-transform: none; font-weight: 700;">
                @if (_processing)
                {
                    <MudProgressCircular Class="ms-n1" Size="Size.Small" Indeterminate="true" />
                    <MudText Class="ms-2">Submitting...</MudText>
                }
                else
                {
                    <MudText>Submit Application</MudText>
                }
            </MudButton>
        </div>
    </MudForm>
</MudPaper>

@code {
    [Parameter] public EventCallback OnCancel { get; set; }
    [Parameter] public EventCallback OnSuccess { get; set; }

    private MudForm _form = default!;
    private CreateLeaveRequestValidator _validator = new();
    private CreateLeaveRequestRequest _model = new() { StartDate = DateTime.Today, EndDate = DateTime.Today };
    private List<GetLeaveCategoryListResponse> _categories = new();
    private List<EmployeeLeaveReferenceResponse> _employees = new();
    private bool _processing = false;

    private DateTime? _startDate { get => _model.StartDate; set { _model.StartDate = value ?? DateTime.Today; CalculateDays(); } }
    private DateTime? _endDate { get => _model.EndDate; set { _model.EndDate = value ?? DateTime.Today; CalculateDays(); } }

    protected override async Task OnInitializedAsync()
    {
        var catRes = await LeaveCategoryService.GetLeaveCategoryListAsync();
        if (catRes != null && catRes.IsSuccess) _categories = catRes.Value ?? new();

        var empRes = await LeaveRequestService.GetEmployeeReferenceAsync();
        if (empRes != null && empRes.IsSuccess) _employees = empRes.Value ?? new();

        CalculateDays();
    }

    private void CalculateDays()
    {
        _model.Days = (_model.EndDate - _model.StartDate).TotalDays + 1;
        if (_model.Days < 0) _model.Days = 0;
    }

    private async Task Submit()
    {
        await _form.Validate();
        if (!_form.IsValid) return;
        _processing = true;
        try
        {
            var response = await LeaveRequestService.CreateLeaveRequestAsync(_model);
            await Task.Delay(500);
            if (response != null && response.IsSuccess)
            {
                Snackbar.Add("Leave request submitted", Severity.Success);
                await OnSuccess.InvokeAsync();
            }
        }
        finally { _processing = false; }
    }
}