@using Indotalent.Features.Leave.LeaveBalance
@using Indotalent.Features.Leave.LeaveBalance.Cqrs
@using Indotalent.Features.Leave.LeaveRequest.Cqrs 
@using Indotalent.Features.Leave.LeaveRequest
@using Indotalent.Features.Leave.LeaveCategory
@using Indotalent.Features.Leave.LeaveCategory.Cqrs
@using Indotalent.Shared.Utils
@using MudBlazor
@inject LeaveBalanceService LeaveBalanceService
@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;">Create Leave Balance</MudText>
            <MudText Typo="Typo.body2" Style="color: #64748b;">Initialize new leave quota for an employee.</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">Employee</MudText>
                <MudSelect T="string" @bind-Value="_model.EmployeeId" For="@(() => _model.EmployeeId)" 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)" 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="4">
                <MudText Typo="Typo.subtitle2" Class="mb-1">Year</MudText>
                <MudNumericField @bind-Value="_model.Year" Variant="Variant.Outlined" Margin="Margin.Dense" />
            </MudItem>
            <MudItem xs="12" sm="4">
                <MudText Typo="Typo.subtitle2" Class="mb-1">Entitlement (Quota)</MudText>
                <MudNumericField @bind-Value="_model.Entitlement" Variant="Variant.Outlined" Margin="Margin.Dense" />
            </MudItem>
            <MudItem xs="12" sm="4">
                <MudText Typo="Typo.subtitle2" Class="mb-1">Carry Forward</MudText>
                <MudNumericField @bind-Value="_model.CarryForward" Variant="Variant.Outlined" Margin="Margin.Dense" />
            </MudItem>
            <MudItem xs="12" sm="6">
                <MudText Typo="Typo.subtitle2" Class="mb-1">Valid From</MudText>
                <MudDatePicker @bind-Date="_validFrom" Variant="Variant.Outlined" Margin="Margin.Dense" />
            </MudItem>
            <MudItem xs="12" sm="6">
                <MudText Typo="Typo.subtitle2" Class="mb-1">Valid To</MudText>
                <MudDatePicker @bind-Date="_validTo" Variant="Variant.Outlined" Margin="Margin.Dense" />
            </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;">Cancel</MudButton>
            <MudButton Color="Color.Warning" Variant="Variant.Filled" OnClick="Submit" Disabled="_processing" Style="color:white; font-weight:700;">Create Balance</MudButton>
        </div>
    </MudForm>
</MudPaper>

@code {
    [Parameter] public EventCallback OnCancel { get; set; }
    [Parameter] public EventCallback OnSuccess { get; set; }
    private MudForm _form = default!;
    private CreateLeaveBalanceValidator _validator = new();
    private CreateLeaveBalanceRequest _model = new() { Year = DateTime.Today.Year, ValidFrom = new DateTime(DateTime.Today.Year, 1, 1), ValidTo = new DateTime(DateTime.Today.Year, 12, 31) };
    private List<EmployeeLeaveReferenceResponse> _employees = new();
    private List<GetLeaveCategoryListResponse> _categories = new();
    private bool _processing = false;
    private DateTime? _validFrom { get => _model.ValidFrom; set => _model.ValidFrom = value ?? DateTime.Today; }
    private DateTime? _validTo { get => _model.ValidTo; set => _model.ValidTo = value ?? DateTime.Today; }

    protected override async Task OnInitializedAsync()
    {
        var empRes = await LeaveRequestService.GetEmployeeReferenceAsync();
        if (empRes?.IsSuccess == true) _employees = empRes.Value ?? new();
        var catRes = await LeaveCategoryService.GetLeaveCategoryListAsync();
        if (catRes?.IsSuccess == true) _categories = catRes.Value ?? new();
    }

    private async Task Submit()
    {
        await _form.Validate(); if (!_form.IsValid) return;
        _processing = true;
        try
        {
            _model.Remaining = (_model.Entitlement + _model.CarryForward) - _model.Used;
            var res = await LeaveBalanceService.CreateLeaveBalanceAsync(_model);
            await Task.Delay(500);
            if (res?.IsSuccess == true) { Snackbar.Add("Balance created", Severity.Success); await OnSuccess.InvokeAsync(); }
        }
        finally { _processing = false; }
    }
}