@page "/admin/contracts"
@using TaxBaik.Web.Services.AdminClients
@inject IContractBrowserClient ContractClient
@inject IClientBrowserClient ClientClient
@inject ISnackbar Snackbar
@inject IDialogService DialogService
@attribute [Authorize]

<PageTitle>계약 관리</PageTitle>

<section class="admin-page-hero">
    <div>
        <MudText Typo="Typo.caption" Class="admin-eyebrow">CRM & 세무관리</MudText>
        <MudText Typo="Typo.h4" Class="admin-page-title">계약 관리</MudText>
        <MudText Typo="Typo.body2" Class="admin-page-subtitle">고객 계약과 월 정기수익을 함께 관리합니다.</MudText>
        @if (mrr > 0)
        {
            <MudText Typo="Typo.body2" Class="mt-2">
                월 정기수익:
                <MudChip Size="Size.Small" Color="Color.Primary" Variant="Variant.Filled">₩@mrr.ToString("N0")</MudChip>
            </MudText>
        }
    </div>
    <MudButton Variant="Variant.Filled" Color="Color.Primary" OnClick="OpenCreateDialog" StartIcon="@Icons.Material.Filled.Add">
        새 계약 추가
    </MudButton>
</section>

<MudPaper Class="admin-surface" Elevation="0">
    @if (contracts is null)
    {
        <MudProgressLinear Indeterminate="true" />
    }
    else if (contracts.Count == 0)
    {
        <MudAlert Severity="Severity.Info" Class="mt-4">
            <MudIcon Icon="@Icons.Material.Filled.Description" Class="me-2" />
            계약이 없습니다.
        </MudAlert>
    }
    else
    {
        <MudDataGrid T="Contract"
            Items="@contracts"
            Dense="true"
            Hover="true"
            Striped="true"
            Virtualize="true"
            RowsPerPage="30"
            Class="admin-grid">
            <Columns>
                <PropertyColumn Property="x => x.Id" Title="ID" Sortable="true" />
                <TemplateColumn Title="고객">
                    <CellTemplate>
                        @if (clientMap.TryGetValue(context.Item.ClientId, out var clientName))
                        {
                            <MudLink Href="@($"/taxbaik/admin/clients/{context.Item.ClientId}")" Color="Color.Primary">
                                @clientName
                            </MudLink>
                        }
                    </CellTemplate>
                </TemplateColumn>
                <PropertyColumn Property="x => x.ContractNumber" Title="계약번호" />
                <PropertyColumn Property="x => x.ServiceType" Title="서비스 유형" />
                <PropertyColumn Property="x => x.MonthlyFee" Title="월 수수료" Format="C" />
                <TemplateColumn Title="계약기간">
                    <CellTemplate>
                        @context.Item.StartDate.ToString("yyyy-MM-dd")
                        @if (context.Item.EndDate.HasValue)
                        {
                            <span>~@context.Item.EndDate.Value.ToString("yyyy-MM-dd")</span>
                        }
                    </CellTemplate>
                </TemplateColumn>
                <TemplateColumn Title="상태">
                    <CellTemplate>
                        @{
                            var isActive = !context.Item.EndDate.HasValue || context.Item.EndDate.Value >= DateTime.Today;
                        }
                        @if (isActive)
                        {
                            <MudChip Size="Size.Small" Color="Color.Success" Variant="Variant.Filled">활성</MudChip>
                        }
                        else
                        {
                            <MudChip Size="Size.Small" Color="Color.Default" Variant="Variant.Outlined">만료</MudChip>
                        }
                    </CellTemplate>
                </TemplateColumn>
                <TemplateColumn Title="작업" Sortable="false">
                    <CellTemplate>
                        <MudButtonGroup Size="Size.Small" Variant="Variant.Outlined">
                            <MudIconButton Icon="@Icons.Material.Filled.Delete" Color="Color.Error"
                                OnClick="@(async () => await DeleteContract(context.Item.Id))" />
                        </MudButtonGroup>
                    </CellTemplate>
                </TemplateColumn>
            </Columns>
        </MudDataGrid>
    }
</MudPaper>

<!-- Create Dialog -->
<MudDialog @bind-IsVisible="isDialogOpen" Options="new DialogOptions { MaxWidth = MaxWidth.Small, FullWidth = true }">
    <TitleContent>
        <MudText Typo="Typo.h6">새 계약 추가</MudText>
    </TitleContent>
    <DialogContent>
        <MudForm @ref="form">
            <MudSelect T="int" @bind-Value="contractForm.ClientId" Label="고객" Required="true" Variant="Variant.Outlined" FullWidth="true" Class="mb-4">
                @foreach (var client in clients)
                {
                    <MudSelectItem Value="@client.Id">@client.CompanyName</MudSelectItem>
                }
            </MudSelect>
            <MudTextField T="string" @bind-Value="contractForm.ContractNumber" Label="계약번호" Variant="Variant.Outlined" FullWidth="true" Class="mb-4" Required="true" />
            <MudTextField T="string" @bind-Value="contractForm.ServiceType" Label="서비스 유형" Variant="Variant.Outlined" FullWidth="true" Class="mb-4" Required="true" />
            <MudDatePicker @bind-Date="contractForm.StartDate" Label="계약 시작일" Variant="Variant.Outlined" FullWidth="true" Class="mb-4" Required="true" />
            <MudNumericField T="decimal?" @bind-Value="contractForm.MonthlyFee" Label="월 수수료" Variant="Variant.Outlined" FullWidth="true" Class="mb-4" />
        </MudForm>
    </DialogContent>
    <DialogActions>
        <MudButton OnClick="CloseDialog">취소</MudButton>
        <MudButton Color="Color.Primary" OnClick="SaveContract">저장</MudButton>
    </DialogActions>
</MudDialog>

@code {
    private List<Contract>? contracts;
    private List<Client> clients = [];
    private Dictionary<int, string> clientMap = new();
    private decimal mrr = 0;
    private MudForm? form;
    private bool isDialogOpen;
    private ContractForm contractForm = new();

    protected override async Task OnInitializedAsync()
    {
        await LoadData();
    }

    private async Task LoadData()
    {
        try
        {
            contracts = await ContractClient.GetAllAsync();
            var (clientItems, _) = await ClientClient.GetPagedAsync();
            clients = clientItems.ToList();
            clientMap = clients.ToDictionary(c => c.Id, c => c.CompanyName ?? "");
            mrr = await ContractClient.GetMonthlyRecurringRevenueAsync();
        }
        catch (Exception ex)
        {
            Snackbar.Add($"데이터 로드 실패: {ex.Message}", Severity.Error);
        }
    }

    private void OpenCreateDialog()
    {
        contractForm = new();
        isDialogOpen = true;
    }

    private async Task SaveContract()
    {
        try
        {
            var newId = await ContractClient.CreateAsync(
                contractForm.ClientId,
                contractForm.ContractNumber,
                contractForm.ServiceType,
                contractForm.StartDate ?? DateTime.Now,
                contractForm.MonthlyFee);

            if (newId > 0)
            {
                Snackbar.Add("계약이 추가되었습니다.", Severity.Success);
                CloseDialog();
                await LoadData();
            }
        }
        catch (Exception ex)
        {
            Snackbar.Add($"저장 실패: {ex.Message}", Severity.Error);
        }
    }

    private async Task DeleteContract(int id)
    {
        var parameters = new DialogParameters
        {
            { "Title", "삭제 확인" },
            { "Message", "이 계약을 삭제하시겠습니까?" }
        };

        var dialog = await DialogService.ShowAsync<ConfirmDialog>("", parameters);
        var result = await dialog.Result;

        if (result?.Canceled ?? true)
            return;

        try
        {
            await ContractClient.DeleteAsync(id);
            Snackbar.Add("계약이 삭제되었습니다.", Severity.Success);
            await LoadData();
        }
        catch (Exception ex)
        {
            Snackbar.Add($"삭제 실패: {ex.Message}", Severity.Error);
        }
    }

    private void CloseDialog()
    {
        isDialogOpen = false;
        contractForm = new();
    }

    private class ContractForm
    {
        public int ClientId { get; set; }
        public string ContractNumber { get; set; } = "";
        public string ServiceType { get; set; } = "";
        public DateTime? StartDate { get; set; }
        public decimal? MonthlyFee { get; set; }
    }
}