@using Indotalent.Features.Payroll.Payrolls
@using Indotalent.Features.Payroll.PayrollDetails.Cqrs
@using Microsoft.AspNetCore.Components.Web
@using Microsoft.JSInterop
@using MudBlazor
@using ClosedXML.Excel
@using System.IO
@inject PayrollsService PayrollsService
@inject IDialogService DialogService
@inject ISnackbar Snackbar
@inject IJSRuntime JSRuntime

<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="() => OnBack.InvokeAsync()" />
        <div>
            <MudText Typo="Typo.h5" Style="font-weight: 900; color: #1a1a1a;">Employee Payroll List</MudText>
            <MudText Typo="Typo.body2" Style="color: #64748b;">Reviewing distribution for period: <b>@PeriodName</b></MudText>
        </div>
    </div>
</MudPaper>

<MudPaper Elevation="0" Outlined="true" Style="border-radius: 0px; overflow: hidden; background-color: #ffffff; border: 1px solid #DCEBFA;">

    <div style="padding: 24px; border-bottom: 2px solid #DCEBFA; display: flex; justify-content: space-between; align-items: center; background-color: #F0F7FF; min-height: 100px;">
        
        <div style="display: flex; align-items: center; gap: 8px;">
            <MudTextField @bind-Value="_searchString"
                          Placeholder="Search..." 
                          Adornment="Adornment.Start"
                          AdornmentIcon="@Icons.Material.Filled.Search"
                          IconSize="Size.Small"
                          Class="mt-0"
                          Variant="Variant.Outlined"
                          Margin="Margin.Dense"
                          Style="background-color: white; width: 300px; border-radius: 0px;"
                          OnKeyDown="@HandleSearchKeyDown" />
            
            <MudButton Variant="Variant.Filled"
                       Color="Color.Primary"
                       OnClick="OnSearchClick"
                       Size="Size.Small"
                       Style="text-transform: none; font-weight: 700; border-radius: 4px; height: 32.25px; box-shadow: none;">
                Search
            </MudButton>
        </div>

        <div style="display: flex; gap: 8px; align-items: center;">
            <MudButton Variant="Variant.Outlined"
                       Color="Color.Success"
                       OnClick="ExportToExcel"
                       Size="Size.Small"
                       Disabled="_isExporting"
                       StartIcon="@(_isExporting ? null : Icons.Custom.FileFormats.FileExcel)"
                       Style="border: 1px solid #e0e0e0; background:white; font-weight: 700; border-radius: 4px; text-transform: none; height: 32.25px;">
                @if (_isExporting)
                {
                    <MudProgressCircular Class="ms-n1" Size="Size.Small" Indeterminate="true" />
                }
                else
                {

                    <MudText Typo="Typo.button" Style="text-transform: none !important;">Excel</MudText>
                }
            </MudButton>

            <MudButton Variant="Variant.Outlined"
                       Color="Color.Primary"
                       OnClick="LoadDetails"
                       Size="Size.Small"
                       StartIcon="@(_loading ? null : Icons.Material.Filled.Refresh)"
                       Disabled="_loading"
                       Style="border: 1px solid #e0e0e0; background:white; font-weight: 700; border-radius: 4px; text-transform: none; height: 32.25px;">
                @if (_loading)
                {
                    <MudProgressCircular Class="ms-n1" Size="Size.Small" Indeterminate="true" />
                }
                else
                {

                    <MudText Typo="Typo.button" Style="text-transform: none !important;">Refresh</MudText>
                }
            </MudButton>

            @if (_selectedRow != null)
            {
                <MudButton Variant="Variant.Filled"
                           Color="Color.Info"
                           StartIcon="@Icons.Material.Filled.Assignment"
                           OnClick="OpenSlipPopup"
                           Size="Size.Small"
                           Style="text-transform: none; font-weight: 700; border-radius: 4px; height: 32.25px;">
                    Detail
                </MudButton>
                <MudIconButton Icon="@Icons.Material.Filled.Close" Size="Size.Small" OnClick="() => _selectedRow = null" Variant="Variant.Outlined" Style="background:white; border-radius: 0px; height: 32.25px;" />
            }
        </div>
    </div>

    <MudTable Items="@GetPagedData()" Hover="true" Elevation="0" Dense="true" T="GetPayrollDetailListByProcessIdResponse" OnRowClick="@((args) => _selectedRow = args.Item)" Loading="@_loading">
        <HeaderContent>
            <MudTh Style="width: 50px; border-bottom: 2px solid #DCEBFA;"></MudTh>
            <MudTh Style="font-weight: 900; color: #1a1a1a; text-transform: uppercase; font-size: 0.75rem;">NIK</MudTh>
            <MudTh Style="font-weight: 900; color: #1a1a1a; text-transform: uppercase; font-size: 0.75rem;">Employee Name</MudTh>
            <MudTh Style="font-weight: 900; color: #1a1a1a; text-transform: uppercase; font-size: 0.75rem; text-align: right;">Basic Salary</MudTh>
            <MudTh Style="font-weight: 900; color: #1a1a1a; text-transform: uppercase; font-size: 0.75rem; text-align: right;">Incomes</MudTh>
            <MudTh Style="font-weight: 900; color: #1a1a1a; text-transform: uppercase; font-size: 0.75rem; text-align: right;">Deductions</MudTh>
            <MudTh Style="font-weight: 900; color: #1a1a1a; text-transform: uppercase; font-size: 0.75rem; text-align: right;">Take Home Pay</MudTh>
        </HeaderContent>
        <RowTemplate>
            <MudTd>
                <MudCheckBox T="bool" Value="@(_selectedRow?.Id == context.Id)" Color="Color.Primary" Dense="true" Size="Size.Small" ReadOnly="true" />
            </MudTd>
            <MudTd>@context.EmployeeCode</MudTd>
            <MudTd Style="font-weight: 700;">@context.EmployeeName</MudTd>
            <MudTd Style="text-align: right;">@context.BasicSalary.ToString("N0")</MudTd>
            <MudTd Style="text-align: right; color: #2E7D32;">@context.TotalIncome.ToString("N0")</MudTd>
            <MudTd Style="text-align: right; color: #C62828;">(@context.TotalDeduction.ToString("N0"))</MudTd>
            <MudTd Style="text-align: right;">
                <MudChip T="string" Color="Color.Primary" Size="Size.Small" Style="font-weight: 900; border-radius: 0px;">
                    @context.TakeHomePay.ToString("N0")
                </MudChip>
            </MudTd>
        </RowTemplate>
    </MudTable>

    <div style="display: flex; justify-content: space-between; align-items: center; padding: 12px 24px; background-color: #F0F7FF; border-top: 2px solid #DCEBFA;">
        <div style="display: flex; align-items: center; gap: 12px;">
            <MudText Typo="Typo.caption" Style="font-weight: 700; color: #0D47A1;">Rows per page:</MudText>
            <MudSelect T="int" Value="@_top" ValueChanged="OnPageSizeChanged" Dense="true" Margin="Margin.Dense" Style="width: 80px; background-color: white; font-size: 12px; font-weight: 600;" Variant="Variant.Outlined" Class="mt-0 custom-select-dense">
                <MudSelectItem Value="5" />
                <MudSelectItem Value="10" />
                <MudSelectItem Value="50" />
                <MudSelectItem Value="500" />
                <MudSelectItem Value="1000" />
            </MudSelect>
            <MudText Typo="Typo.caption" Style="color: #1E88E5; margin-left: 12px;">
                Showing @(GetFilteredData().Count() == 0 ? 0 : _skip + 1)-@Math.Min(_skip + _top, GetFilteredData().Count()) of @GetFilteredData().Count()
            </MudText>
        </div>

        <div style="display: flex; gap: 8px; align-items: center;">
            <MudIconButton Icon="@Icons.Material.Filled.FirstPage" Size="Size.Small" OnClick="@(() => OnPageChanged(1))" Disabled="@(_currentPage == 1)" Style="@(_currentPage == 1 ? "background-color: #f1f5f9; color: #cbd5e1; border: none;" : "background-color: white; border: 1px solid #DCEBFA; color: #0D47A1;")" Class="rounded-0" />
            <MudButton OnClick="@(() => OnPageChanged(_currentPage - 1))" Disabled="@(_currentPage == 1)" Variant="Variant.Text" StartIcon="@Icons.Material.Filled.ChevronLeft" Size="Size.Small" Style="@(_currentPage == 1 ? "text-transform: none; font-weight: 700; color: #cbd5e1;" : "text-transform: none; font-weight: 700; color: #0D47A1;")">Prev</MudButton>
            <MudText Typo="Typo.caption" Style="font-weight: 700; margin: 0 10px; color: #1a1a1a;">Page @_currentPage of @(_totalPage == 0 ? 1 : _totalPage)</MudText>
            <MudButton OnClick="@(() => OnPageChanged(_currentPage + 1))" Disabled="@(_currentPage == _totalPage || _totalPage == 0)" Variant="Variant.Text" EndIcon="@Icons.Material.Filled.ChevronRight" Size="Size.Small" Style="@(_currentPage == _totalPage || _totalPage == 0 ? "text-transform: none; font-weight: 700; color: #cbd5e1;" : "text-transform: none; font-weight: 700; color: #0D47A1;")">Next</MudButton>
            <MudIconButton Icon="@Icons.Material.Filled.LastPage" Size="Size.Small" OnClick="@(() => OnPageChanged(_totalPage))" Disabled="@(_currentPage == _totalPage || _totalPage == 0)" Style="@(_currentPage == _totalPage || _totalPage == 0 ? "background-color: #f1f5f9; color: #cbd5e1; border: none;" : "background-color: white; border: 1px solid #DCEBFA; color: #0D47A1;")" Class="rounded-0" />
        </div>
    </div>
</MudPaper>

<style>
    .mud-input-outlined-border { border-radius: 0px !important; }
    .custom-select-dense .mud-input-control { margin-top: 0 !important; }
    .custom-select-dense .mud-input-slot { padding-top: 4px !important; padding-bottom: 4px !important; padding-left: 8px !important; font-size: 12px !important; }
</style>

<script>
    function downloadFile(fileName, contentType, base64String) {
        const link = document.createElement('a');
        link.download = fileName;
        link.href = `data:${contentType};base64,${base64String}`;
        document.body.appendChild(link);
        link.click();
        document.body.removeChild(link);
    }
</script>

@code {
    [Parameter] public string ProcessId { get; set; } = string.Empty;
    [Parameter] public string PeriodName { get; set; } = string.Empty;
    [Parameter] public EventCallback OnBack { get; set; }

    private List<GetPayrollDetailListByProcessIdResponse> _details = new();
    private GetPayrollDetailListByProcessIdResponse? _selectedRow;
    private string _searchString = "";
    private int _skip = 0;
    private int _top = 5;
    private int _totalPage => GetFilteredData().Count() == 0 ? 0 : (int)Math.Ceiling((double)GetFilteredData().Count() / (_top == 0 ? 1 : _top));
    private int _currentPage => (_top >= GetFilteredData().Count() || _top == 0) ? 1 : (_skip / _top) + 1;
    private bool _loading = false;
    private bool _isExporting = false;

    protected override async Task OnParametersSetAsync()
    {
        if (!string.IsNullOrEmpty(ProcessId)) await LoadDetails();
    }

    private async Task LoadDetails()
    {
        _loading = true;
        _selectedRow = null;
        StateHasChanged();
        var response = await PayrollsService.GetPayrollDetailListByProcessIdAsync(ProcessId);
        if (response != null && response.IsSuccess)
        {
            _details = response.Value ?? new();
        }
        _loading = false;
        StateHasChanged();
    }

    private IEnumerable<GetPayrollDetailListByProcessIdResponse> GetFilteredData()
    {
        if (string.IsNullOrWhiteSpace(_searchString)) return _details;
        return _details.Where(x =>
            (x.EmployeeCode?.Contains(_searchString, StringComparison.OrdinalIgnoreCase) ?? false) ||
            (x.EmployeeName?.Contains(_searchString, StringComparison.OrdinalIgnoreCase) ?? false)
        );
    }

    private IEnumerable<GetPayrollDetailListByProcessIdResponse> GetPagedData() => GetFilteredData().Skip(_skip).Take(_top);

    private void OnSearchClick() { _skip = 0; StateHasChanged(); }
    private void HandleSearchKeyDown(KeyboardEventArgs e) { if (e.Key == "Enter") OnSearchClick(); }
    private void OnPageChanged(int page) { _skip = (page - 1) * _top; _selectedRow = null; StateHasChanged(); }
    private void OnPageSizeChanged(int size) { _top = size; _skip = 0; _selectedRow = null; StateHasChanged(); }

    private async Task OpenSlipPopup()
    {
        if (_selectedRow == null) return;
        
        var response = await PayrollsService.GetPayrollSlipByIdAsync(_selectedRow.Id!);
        if (response != null && response.IsSuccess)
        {
            var parameters = new DialogParameters<_PayrollSlipDialog>
            {
                { x => x.Data, response.Value },
                { x => x.PeriodName, PeriodName }
            };

            var options = new DialogOptions { MaxWidth = MaxWidth.Medium, FullWidth = true, CloseButton = true };
            await DialogService.ShowAsync<_PayrollSlipDialog>("", parameters, options);
        }
    }

    private async Task ExportToExcel()
    {
        _isExporting = true;
        StateHasChanged();
        try
        {
            await Task.Delay(500);
            using var workbook = new XLWorkbook();
            var worksheet = workbook.Worksheets.Add("EmployeePayroll");
            worksheet.Cell(1, 1).Value = "NIK";
            worksheet.Cell(1, 2).Value = "Employee Name";
            worksheet.Cell(1, 3).Value = "Basic Salary";
            worksheet.Cell(1, 4).Value = "Total Income";
            worksheet.Cell(1, 5).Value = "Total Deduction";
            worksheet.Cell(1, 6).Value = "Take Home Pay";
            var headerRange = worksheet.Range(1, 1, 1, 6);
            headerRange.Style.Font.Bold = true;
            headerRange.Style.Fill.BackgroundColor = XLColor.FromHtml("#0D47A1");
            headerRange.Style.Font.FontColor = XLColor.White;
            int row = 2;
            foreach (var item in GetFilteredData())
            {
                worksheet.Cell(row, 1).Value = item.EmployeeCode;
                worksheet.Cell(row, 2).Value = item.EmployeeName;
                worksheet.Cell(row, 3).Value = item.BasicSalary;
                worksheet.Cell(row, 4).Value = item.TotalIncome;
                worksheet.Cell(row, 5).Value = item.TotalDeduction;
                worksheet.Cell(row, 6).Value = item.TakeHomePay;
                row++;
            }
            worksheet.Columns().AdjustToContents();
            using var stream = new MemoryStream();
            workbook.SaveAs(stream);
            await JSRuntime.InvokeVoidAsync("downloadFile", $"Payroll_Detail_{PeriodName}.xlsx", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", Convert.ToBase64String(stream.ToArray()));
            Snackbar.Add("Excel exported successfully", Severity.Success);
        }
        catch (Exception ex) { Snackbar.Add($"Export failed: {ex.Message}", Severity.Error); }
        finally { _isExporting = false; StateHasChanged(); }
    }
}