using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.EntityFrameworkCore;
using DrSousan.Api.Data;
using DrSousan.Api.Models;

namespace DrSousan.Api.Pages.Blog;

public class BlogIndexModel : PageModel
{
    private readonly AppDbContext _db;
    private const int PageSize = 10;

    public BlogIndexModel(AppDbContext db) => _db = db;

    public List<BlogPost>     Posts      { get; private set; } = new();
    public List<BlogCategory> Categories { get; private set; } = new();
    public int  CurrentPage   { get; private set; } = 1;
    public int  TotalPages    { get; private set; } = 1;
    public int  TotalPosts    { get; private set; } = 0;
    public string? ActiveCat  { get; private set; }

    public async Task<IActionResult> OnGetAsync(int page = 1, string? category = null)
    {
        CurrentPage = page < 1 ? 1 : page;
        ActiveCat   = category;

        var q = _db.BlogPosts.Include(p => p.Category).Where(p => p.IsPublished);

        if (!string.IsNullOrEmpty(category))
            q = q.Where(p => p.Category != null && p.Category.Slug == category);

        TotalPosts = await q.CountAsync();
        TotalPages = Math.Max(1, (int)Math.Ceiling(TotalPosts / (double)PageSize));

        if (CurrentPage > TotalPages) CurrentPage = TotalPages;

        Posts = await q
            .OrderByDescending(p => p.PublishedAt)
            .Skip((CurrentPage - 1) * PageSize)
            .Take(PageSize)
            .ToListAsync();

        Categories = await _db.BlogCategories
            .Include(c => c.Posts)
            .ToListAsync();

        ViewData["SiteName"] = await GetSiteNameAsync();
        ViewData["Title"]    = "وبلاگ | دکتر سوسن آل‌طه";

        return Page();
    }

    private async Task<string> GetSiteNameAsync()
    {
        var s = await _db.SiteSettings
            .FirstOrDefaultAsync(x => x.Section == "hero" && x.Key == "name");
        return s?.Value ?? "دکتر سوسن آل‌طه";
    }
}