namespace TaxBaik.Application.Services;

using Microsoft.Extensions.Caching.Memory;
using TaxBaik.Domain.Entities;

public record AdminDashboardSummary(
    int ThisMonthInquiries,
    int NewInquiries,
    int TotalPosts,
    int PublishedPosts,
    IReadOnlyList<Inquiry> RecentInquiries);

public class AdminDashboardService(
    InquiryService inquiryService,
    BlogService blogService,
    IMemoryCache memoryCache)
{
    private static readonly TimeSpan CacheDuration = TimeSpan.FromSeconds(30);
    public const string CacheKey = "admin-dashboard-summary";

    public async Task<AdminDashboardSummary> GetSummaryAsync(CancellationToken ct = default)
    {
        if (memoryCache.TryGetValue(CacheKey, out AdminDashboardSummary? cached) && cached != null)
            return cached;

        var recentTask = inquiryService.GetPagedAsync(1, 5, ct: ct);
        var thisMonthTask = inquiryService.CountThisMonthAsync(ct);
        var newTask = inquiryService.CountByStatusAsync("new", ct);
        var statsTask = blogService.GetStatsAsync(ct);

        var (recentInquiries, _) = await recentTask;
        var stats = await statsTask;
        var summary = new AdminDashboardSummary(
            ThisMonthInquiries: await thisMonthTask,
            NewInquiries: await newTask,
            TotalPosts: stats.TotalPosts,
            PublishedPosts: stats.PublishedPosts,
            RecentInquiries: recentInquiries.OrderByDescending(x => x.CreatedAt).Take(5).ToList());

        memoryCache.Set(CacheKey, summary, CacheDuration);
        return summary;
    }
}