@page "/admin/contracts"
@using TaxBaik.Web.Services.AdminClients
@inject IContractBrowserClient ContractClient
@inject IClientBrowserClient ClientClient
@inject IJSRuntime JS
@attribute [Authorize]

<PageTitle>계약 관리</PageTitle>

<section class="admin-page-hero">
    <div>
        <div class="admin-eyebrow">CRM & 세무관리</div>
        <h1 class="admin-page-title">계약 관리</h1>
        <p class="admin-page-subtitle">고객 계약과 월 정기수익을 함께 관리합니다.</p>
        @if (mrr > 0)
        {
            <p class="admin-page-subtitle mt-2">월 정기수익: <strong>₩@mrr.ToString("N0")</strong></p>
        }
    </div>
    <button type="button" class="site-button primary" @onclick="OpenCreateDialog">새 계약 추가</button>
</section>

<div class="admin-surface">
    @if (contracts is null)
    {
        <Skeleton Count="5" CssClass="taxbaik-skeleton-grid" />
    }
    else if (contracts.Count == 0)
    {
        <div class="muted">계약이 없습니다.</div>
    }
    else
    {
        <div class="admin-table-wrap">
            <table class="admin-table">
                <thead>
                    <tr>
                        <th>ID</th>
                        <th>고객</th>
                        <th>계약번호</th>
                        <th>서비스 유형</th>
                        <th>월 수수료</th>
                        <th>계약기간</th>
                        <th>상태</th>
                        <th>작업</th>
                    </tr>
                </thead>
                <tbody>
                    @foreach (var item in contracts)
                    {
                        var isActive = !item.EndDate.HasValue || item.EndDate.Value >= DateTime.Today;
                        <tr>
                            <td>@item.Id</td>
                            <td>@(clientMap.TryGetValue(item.ClientId, out var clientName) ? clientName : "")</td>
                            <td>@item.ContractNumber</td>
                            <td>@item.ServiceType</td>
                            <td>@(item.MonthlyFee?.ToString("C") ?? "—")</td>
                            <td>@item.StartDate@if (item.EndDate.HasValue){<span>~ @item.EndDate.Value</span>}</td>
                            <td><span class="status-pill @(isActive ? "success" : "muted")">@(isActive ? "활성" : "만료")</span></td>
                            <td><button type="button" class="admin-icon-button danger" @onclick="@(async () => await DeleteContract(item.Id))">✕</button></td>
                        </tr>
                    }
                </tbody>
            </table>
        </div>
    }
</div>

<dialog class="admin-dialog" open="@isDialogOpen">
    <form class="admin-dialog-card" @onsubmit="SaveContract" @onsubmit:preventDefault="true">
        <h3>새 계약 추가</h3>
        <label>고객
            <select class="admin-input" @bind="ClientIdText">
                <option value="">선택하세요</option>
                @foreach (var client in clients)
                {
                    <option value="@client.Id.ToString()">@GetClientDisplayName(client)</option>
                }
            </select>
        </label>
        <label>계약번호 <input class="admin-input" @bind="contractForm.ContractNumber" /></label>
        <label>서비스 유형
            <select class="admin-input" @bind="contractForm.ServiceType">
                <option value="개인 기장대리">개인 기장대리</option>
                <option value="법인 기장대리">법인 기장대리</option>
                <option value="세무조정 대행">세무조정 대행</option>
                <option value="양도세 신고대리">양도세 신고대리</option>
                <option value="상속·증여 자문">상속·증여 자문</option>
                <option value="세무조사 대응">세무조사 대응</option>
            </select>
        </label>
        <label>계약 시작일 <input class="admin-input" type="text" placeholder="2026-06-29" @bind="StartDateText" /></label>
        <label>월 수수료 <input class="admin-input" type="text" placeholder="100000" @bind="MonthlyFeeText" /></label>
        <div class="admin-dialog-actions">
            <button type="button" class="site-button secondary" @onclick="CloseDialog">취소</button>
            <button type="submit" class="site-button primary">저장</button>
        </div>
    </form>
</dialog>

@code {
    [CascadingParameter] private Task<AuthenticationState>? AuthStateTask { get; set; }
    private List<Contract>? contracts;
    private List<Client> clients = [];
    private Dictionary<int, string> clientMap = new();
    private decimal mrr = 0;
    private bool isDialogOpen;
    private ContractForm contractForm = new();
    private string ClientIdText { get => contractForm.ClientId > 0 ? contractForm.ClientId.ToString() : ""; set => contractForm.ClientId = int.TryParse(value, out var id) ? id : 0; }
    private string StartDateText { get => contractForm.StartDate?.ToString("yyyy-MM-dd") ?? ""; set => contractForm.StartDate = DateTime.TryParse(value, out var dt) ? dt : null; }
    private string MonthlyFeeText { get => contractForm.MonthlyFee?.ToString() ?? ""; set => contractForm.MonthlyFee = decimal.TryParse(value, out var amount) ? amount : null; }

    protected override async Task OnAfterRenderAsync(bool firstRender)
    {
        if (firstRender && AuthStateTask != null)
        {
            var authState = await AuthStateTask;
            if (authState.User.Identity?.IsAuthenticated == true)
            {
                await LoadData();
                StateHasChanged();
            }
        }
    }

    private async Task LoadData()
    {
        try
        {
            contracts = await ContractClient.GetAllAsync();
            var (clientItems, _) = await ClientClient.GetPagedAsync(pageSize: 1000);
            clients = clientItems.ToList();
            clientMap = clients.ToDictionary(c => c.Id, GetClientDisplayName);
            mrr = await ContractClient.GetMonthlyRecurringRevenueAsync();
        }
        catch (Exception ex)
        {
            await JS.InvokeVoidAsync("alert", $"데이터 로드 실패: {ex.Message}");
        }
    }

    private void OpenCreateDialog()
    {
        contractForm = new ContractForm { ClientId = clients.FirstOrDefault()?.Id ?? 0, StartDate = DateTime.Today };
        isDialogOpen = true;
    }

    private async Task SaveContract()
    {
        try
        {
            if (contractForm.ClientId <= 0)
            {
                await JS.InvokeVoidAsync("alert", "고객을 선택하세요.");
                return;
            }

            var newId = await ContractClient.CreateAsync(contractForm.ClientId, contractForm.ContractNumber, contractForm.ServiceType, contractForm.StartDate ?? DateTime.Today, contractForm.MonthlyFee);
            if (newId > 0)
            {
                await JS.InvokeVoidAsync("alert", "계약이 추가되었습니다.");
                CloseDialog();
                await LoadData();
            }
        }
        catch (Exception ex)
        {
            await JS.InvokeVoidAsync("alert", $"저장 실패: {ex.Message}");
        }
    }

    private async Task DeleteContract(int id)
    {
        if (!await JS.InvokeAsync<bool>("confirm", "이 계약을 삭제하시겠습니까?")) return;
        try
        {
            await ContractClient.DeleteAsync(id);
            await JS.InvokeVoidAsync("alert", "계약이 삭제되었습니다.");
            await LoadData();
        }
        catch (Exception ex)
        {
            await JS.InvokeVoidAsync("alert", $"삭제 실패: {ex.Message}");
        }
    }

    private void CloseDialog() { isDialogOpen = false; contractForm = new(); }
    private static string GetClientDisplayName(Client client) => !string.IsNullOrWhiteSpace(client.CompanyName) ? client.CompanyName : !string.IsNullOrWhiteSpace(client.Name) ? client.Name : $"Client #{client.Id}";
    private sealed 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; } }
}