@using Indotalent.ConfigBackEnd.Extensions
@using Indotalent.Features.Leave.LeaveBalance
@using Indotalent.Features.Leave.LeaveBalance.Cqrs
@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 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;">@(ReadOnly ? "Balance Details" : "Adjust Balance")</MudText>
            <MudText Typo="Typo.body2" Style="color: #64748b;">Review or modify employee leave quota for the specified period.</MudText>
        </div>
    </div>
</MudPaper>

<MudPaper Elevation="0" Outlined="true" Class="pa-8" Style="border-radius: 0px; border: 1px solid #DCEBFA;">
    @if (_isInitialLoading)
    {
        <div class="d-flex flex-column align-center justify-center pa-10">
            <MudProgressCircular Color="Color.Info" Indeterminate="true" Size="Size.Large" />
            <MudText Typo="Typo.body2" Class="mt-4">Loading balance configuration...</MudText>
        </div>
    }
    else
    {
        <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"
                               ReadOnly="ReadOnly"
                               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"
                               ReadOnly="ReadOnly"
                               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" ReadOnly="ReadOnly" Variant="Variant.Outlined" Margin="Margin.Dense" />
                </MudItem>
                <MudItem xs="12" sm="4">
                    <MudText Typo="Typo.subtitle2" Class="mb-1">Entitlement (Base Quota)</MudText>
                    <MudNumericField @bind-Value="_model.Entitlement" ReadOnly="ReadOnly" 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" ReadOnly="ReadOnly" Variant="Variant.Outlined" Margin="Margin.Dense" />
                </MudItem>

                <MudItem xs="12" sm="6">
                    <MudText Typo="Typo.subtitle2" Class="mb-1">Validity Period (From)</MudText>
                    <MudDatePicker @bind-Date="_validFrom" ReadOnly="ReadOnly" Variant="Variant.Outlined" Margin="Margin.Dense" />
                </MudItem>
                <MudItem xs="12" sm="6">
                    <MudText Typo="Typo.subtitle2" Class="mb-1">Validity Period (To)</MudText>
                    <MudDatePicker @bind-Date="_validTo" ReadOnly="ReadOnly" Variant="Variant.Outlined" Margin="Margin.Dense" />
                </MudItem>

                <MudItem xs="12" Class="mt-4">
                    <MudText Typo="Typo.button" Color="Color.Info" Style="font-weight: 800;">Calculation Summary</MudText>
                    <MudDivider Class="mt-2 mb-4" />
                </MudItem>
                <MudItem xs="12" sm="4">
                    <MudText Typo="Typo.subtitle2" Class="mb-1">Used (Days)</MudText>
                    <MudNumericField @bind-Value="_model.Used" ReadOnly="true" Variant="Variant.Filled" Margin="Margin.Dense" />
                </MudItem>
                <MudItem xs="12" sm="4">
                    <MudText Typo="Typo.subtitle2" Class="mb-1">Pending (Days)</MudText>
                    <MudNumericField @bind-Value="_model.Pending" ReadOnly="true" Variant="Variant.Filled" Margin="Margin.Dense" />
                </MudItem>
                <MudItem xs="12" sm="4">
                    <MudText Typo="Typo.subtitle2" Class="mb-1">Remaining Balance</MudText>
                    <MudNumericField Value="@((_model.Entitlement + _model.CarryForward) - _model.Used - _model.Pending)"
                                     ReadOnly="true" Variant="Variant.Filled" Margin="Margin.Dense"
                                     Style="font-weight: 900; color: #2e7d32;" />
                </MudItem>

                <MudItem xs="12" Class="mt-4">
                    <MudText Typo="Typo.button" Color="Color.Primary" Style="font-weight: 800;">Audit History</MudText>
                    <MudDivider Class="mt-2 mb-4" />
                </MudItem>
                <MudItem xs="12" sm="6">
                    <MudGrid Spacing="2">
                        <MudItem xs="12">
                            <MudText Typo="Typo.subtitle2" Class="mb-1">Created By</MudText>
                            <MudText Typo="Typo.body2" Style="color: #1a1a1a; font-weight: 600;">@(!string.IsNullOrEmpty(_model.CreatedBy) ? _model.CreatedBy : "System")</MudText>
                        </MudItem>
                        <MudItem xs="12">
                            <MudText Typo="Typo.subtitle2" Class="mb-1">Updated By</MudText>
                            <MudText Typo="Typo.body2" Style="color: #1a1a1a; font-weight: 600;">@(!string.IsNullOrEmpty(_model.UpdatedBy) ? _model.UpdatedBy : "-")</MudText>
                        </MudItem>
                    </MudGrid>
                </MudItem>
                <MudItem xs="12" sm="6">
                    <MudGrid Spacing="2">
                        <MudItem xs="12">
                            <MudText Typo="Typo.subtitle2" Class="mb-1">Created At</MudText>
                            <MudText Typo="Typo.body2" Style="color: #1a1a1a; font-weight: 600;">@DateTimeExtensions.ToString(_model.CreatedAt)</MudText>
                        </MudItem>
                        <MudItem xs="12">
                            <MudText Typo="Typo.subtitle2" Class="mb-1">Updated At</MudText>
                            <MudText Typo="Typo.body2" Style="color: #1a1a1a; font-weight: 600;">@DateTimeExtensions.ToString(_model.UpdatedAt)</MudText>
                        </MudItem>
                    </MudGrid>
                </MudItem>
            </MudGrid>

            <div class="d-flex justify-end gap-2 mt-10">
                <MudButton OnClick="() => OnCancel.InvokeAsync()" Variant="Variant.Outlined" Disabled="_processing" Style="border: 1px solid #e0e0e0; border-radius: 4px; text-transform: none; font-weight: 700;">@(ReadOnly ? "Back to List" : "Cancel")</MudButton>
                @if (!ReadOnly)
                {
                    <MudButton Color="Color.Info" Variant="Variant.Filled" OnClick="Submit" Disabled="_processing" Style="border-radius: 4px; text-transform: none; font-weight: 700; color: white;">
                        @if (_processing)
                        {
                            <MudProgressCircular Size="Size.Small" Indeterminate="true" />
                        }
                        else
                        {
                            <MudText>Save Adjustments</MudText>
                        }
                    </MudButton>
                }
            </div>
        </MudForm>
    }
</MudPaper>

@code {
    [Parameter] public UpdateLeaveBalanceRequest Data { get; set; } = new();
    [Parameter] public bool ReadOnly { get; set; } = false;
    [Parameter] public EventCallback OnCancel { get; set; }
    [Parameter] public EventCallback OnSuccess { get; set; }

    private MudForm _form = default!;
    private UpdateLeaveBalanceValidator _validator = new();
    private UpdateLeaveBalanceRequest _model = new();
    private List<EmployeeLeaveReferenceResponse> _employees = new();
    private List<GetLeaveCategoryListResponse> _categories = new();
    private bool _processing = false;
    private bool _isInitialLoading = true;

    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()
    {
        _isInitialLoading = true;
        try
        {
            _model = Data;
            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();
        }
        finally { _isInitialLoading = false; }
    }

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