@page "/session/{SessionId:guid}/history"
@using GmRelay.Web.Services
@using GmRelay.Web.Services.Portfolio
@using Microsoft.AspNetCore.Authorization
@using Microsoft.AspNetCore.Components.Authorization
@attribute [Authorize]
@inject AuthorizedSessionService SessionService
@inject AuthorizedPortfolioService PortfolioService
@inject AuthenticationStateProvider AuthStateProvider
@inject NavigationManager Navigation

<PageTitle>История изменений — GM-Relay</PageTitle>

<div class="page-container">
    <ul class="gm-breadcrumb animate-fade-in">
        <li><a href="/">Главная</a></li>
        <li><a href="/group/@groupId">Группа</a></li>
        <li class="active">История изменений</li>
    </ul>

    <div class="page-header animate-fade-in">
        <h2>📜 История изменений</h2>
        @if (sessionTitle is not null)
        {
            <p style="color: var(--text-muted); margin-top: 0.25rem;">@sessionTitle</p>
        }
        @if (groupId is not null && session is not null && session.ScheduledAt < DateTime.UtcNow)
        {
            <div style="margin-top: 0.75rem;">
                <button type="button" class="btn-gm btn-gm-primary" disabled="@isCreatingDraft" @onclick="AddToPortfolio">
                    @(isCreatingDraft ? "⏳ Создаём..." : "➕ Добавить в портфолио")
                </button>
            </div>
        }
    </div>

    @if (entries is null)
    {
        <div class="glass-card" style="padding: 2rem;">
            <div class="skeleton skeleton-text" style="width: 50%; margin-bottom: 1.5rem;"></div>
            <div class="skeleton skeleton-text" style="width: 100%; height: 2.5rem; margin-bottom: 1.5rem;"></div>
        </div>
    }
    else if (entries.Count == 0)
    {
        <div class="glass-card animate-slide-up" style="padding: 2rem; text-align: center;">
            <p style="color: var(--text-muted);">История изменений пуста. Значимые изменения (время, ссылка, название, участники) будут отображаться здесь.</p>
        </div>
    }
    else
    {
        <div class="glass-card animate-slide-up">
            <div class="table-responsive">
                <table class="gm-table">
                    <thead>
                        <tr>
                            <th>Время</th>
                            <th>Актор</th>
                            <th>Тип изменения</th>
                            <th>Было</th>
                            <th>Стало</th>
                        </tr>
                    </thead>
                    <tbody>
                        @foreach (var entry in entries)
                        {
                            <tr>
                                <td>@entry.ChangedAt.ToString("dd.MM.yyyy HH:mm") UTC</td>
                                <td>@entry.ActorName (@entry.ActorExternalUserId)</td>
                                <td>
                                    <span class="status-badge @(GetBadgeClass(entry.ChangeType))">
                                        @GetChangeTypeLabel(entry.ChangeType)
                                    </span>
                                </td>
                                <td style="max-width: 200px; overflow-wrap: break-word; color: var(--text-muted);">@(entry.OldValue ?? "—")</td>
                                <td style="max-width: 200px; overflow-wrap: break-word;">@(entry.NewValue ?? "—")</td>
                            </tr>
                        }
                    </tbody>
                </table>
            </div>
        </div>
    }
</div>

@code {
    [Parameter] public Guid SessionId { get; set; }
    private List<SessionAuditLogEntry>? entries;
    private string? sessionTitle;
    private Guid? groupId;
    private WebSession? session;
    private bool isCreatingDraft;

    protected override async Task OnInitializedAsync()
    {
        var authState = await AuthStateProvider.GetAuthenticationStateAsync();
        if (!authState.User.TryGetPlatformIdentity(out var platform, out var externalUserId))
        {
            Navigation.NavigateTo("/access-denied");
            return;
        }

        session = await SessionService.GetSessionForCurrentUserAsync(SessionId);
        if (session is null)
        {
            Navigation.NavigateTo("/access-denied");
            return;
        }

        sessionTitle = session.Title;
        groupId = session.GroupId;
        entries = await SessionService.GetSessionHistoryForCurrentUserAsync(SessionId);
    }

    private async Task AddToPortfolio()
    {
        if (groupId is null)
        {
            return;
        }

        isCreatingDraft = true;

        try
        {
            var portfolioId = await PortfolioService.CreateDraftForCurrentUserAsync(groupId.Value, SessionId);
            Navigation.NavigateTo($"/portfolio/manage/{portfolioId}");
        }
        catch (SessionAccessDeniedException)
        {
            Navigation.NavigateTo("/access-denied");
        }
        catch
        {
            isCreatingDraft = false;
        }
    }

    private string GetChangeTypeLabel(string changeType) => changeType switch
    {
        "Title" => "Название",
        "Time" => "Время",
        "Link" => "Ссылка",
        "MaxPlayers" => "Лимит мест",
        "Status" => "Статус",
        "WaitlistPromote" => "Продвижение из листа ожидания",
        "PlayerRemoved" => "Исключение игрока",
        "BatchRescheduled" => "Перенос батча",
        "Cancelled" => "Отмена",
        _ => changeType
    };

    private string GetBadgeClass(string changeType) => changeType switch
    {
        "Cancelled" or "PlayerRemoved" => "status-danger",
        "WaitlistPromote" => "status-success",
        "BatchRescheduled" or "Time" => "status-warning",
        _ => "status-info"
    };
}