using System.Security.Claims;
using JobsMedical.Web.Data;
using JobsMedical.Web.Models;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.EntityFrameworkCore;

namespace JobsMedical.Web.Pages.Me;

/// <summary>Job alerts (هشدار شغلی) — saved searches that notify the user on a new matching listing.</summary>
[Authorize]
public class AlertsModel : PageModel
{
    private readonly AppDbContext _db;
    public AlertsModel(AppDbContext db) => _db = db;

    public List<Role> Roles { get; private set; } = new();
    public List<City> Cities { get; private set; } = new();
    public List<JobAlert> Alerts { get; private set; } = new();
    [TempData] public string? Msg { get; set; }

    [BindProperty] public string? Label { get; set; }
    [BindProperty] public AlertScope Scope { get; set; } = AlertScope.Any;
    [BindProperty] public int? RoleId { get; set; }
    [BindProperty] public int? CityId { get; set; }
    [BindProperty] public ShiftType? ShiftType { get; set; }
    [BindProperty] public EmploymentType? EmploymentType { get; set; }
    [BindProperty] public long? MinPay { get; set; }

    private int Uid => int.Parse(User.FindFirstValue(ClaimTypes.NameIdentifier)!);

    public async Task OnGetAsync() => await LoadAsync();

    public async Task<IActionResult> OnPostCreateAsync()
    {
        if (await _db.JobAlerts.CountAsync(a => a.UserId == Uid) >= 20)
        {
            Msg = "حداکثر تعداد هشدار شغلی ساخته شده است.";
            return RedirectToPage();
        }
        _db.JobAlerts.Add(new JobAlert
        {
            UserId = Uid,
            Label = string.IsNullOrWhiteSpace(Label) ? null : Label.Trim(),
            Scope = Scope,
            RoleId = RoleId,
            CityId = CityId,
            ShiftType = Scope == AlertScope.Jobs ? null : ShiftType,
            EmploymentType = Scope == AlertScope.Shifts ? null : EmploymentType,
            MinPay = MinPay is > 0 ? MinPay : null,
        });
        await _db.SaveChangesAsync();
        Msg = "هشدار شغلی ساخته شد. به‌محض ثبت آگهی متناسب، باخبر می‌شوی.";
        return RedirectToPage();
    }

    public async Task<IActionResult> OnPostToggleAsync(int id)
    {
        var a = await _db.JobAlerts.FirstOrDefaultAsync(x => x.Id == id && x.UserId == Uid);
        if (a is not null) { a.IsActive = !a.IsActive; await _db.SaveChangesAsync(); }
        return RedirectToPage();
    }

    public async Task<IActionResult> OnPostDeleteAsync(int id)
    {
        var a = await _db.JobAlerts.FirstOrDefaultAsync(x => x.Id == id && x.UserId == Uid);
        if (a is not null) { _db.JobAlerts.Remove(a); await _db.SaveChangesAsync(); }
        return RedirectToPage();
    }

    private async Task LoadAsync()
    {
        Roles = await _db.Roles.Where(r => r.IsActive).OrderBy(r => r.SortOrder).ToListAsync();
        Cities = await _db.Cities.Where(c => c.IsActive).OrderBy(c => c.Name).ToListAsync();
        Alerts = await _db.JobAlerts.Include(a => a.Role).Include(a => a.City)
            .Where(a => a.UserId == Uid).OrderByDescending(a => a.CreatedAt).ToListAsync();
    }
}