using System.Diagnostics;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using turf_tasker.Data;
using turf_tasker.Models;

namespace turf_tasker.Controllers;

public class HomeController : Controller
{
    private readonly ApplicationDbContext _context;

    // Step 2.1: Inject the database context
    public HomeController(ApplicationDbContext context)
    {
        _context = context;
    }

    // Step 2.2: Make the Index action async
    public async Task<IActionResult> Index()
    {
        // Step 2.3: Query for the last mow event to get its date and pattern
        var lastMowEvent = await _context.LawnCareEvents
            .Where(e => e.EventType == LawnCareEventType.Mowing)
            .OrderByDescending(e => e.EventDate)
            .FirstOrDefaultAsync();

        // Step 2.4: Query for the last water and fertilize dates
        var lastWaterDate = await _context.LawnCareEvents
            .Where(e => e.EventType == LawnCareEventType.Watering)
            .OrderByDescending(e => e.EventDate)
            .Select(e => (DateTime?)e.EventDate) // Select just the date
            .FirstOrDefaultAsync();

        var lastFertilizeDate = await _context.LawnCareEvents
            .Where(e => e.EventType == LawnCareEventType.Fertilizing)
            .OrderByDescending(e => e.EventDate)
            .Select(e => (DateTime?)e.EventDate)
            .FirstOrDefaultAsync();

        // Determine the next mowing pattern
        MowingPattern? nextPattern = MowingPattern.Vertical; // Default
        if (lastMowEvent?.MowingPattern != null)
        {
            // This logic cycles through the enum values
            int currentPatternValue = (int)lastMowEvent.MowingPattern;
            int nextPatternValue = (currentPatternValue + 1) % 4; // 4 patterns total
            nextPattern = (MowingPattern)nextPatternValue;
        }

        // Step 2.5: Create the ViewModel and populate it
        var viewModel = new DashboardViewModel
        {
            LastMowDate = lastMowEvent?.EventDate,
            LastWaterDate = lastWaterDate,
            LastFertilizeDate = lastFertilizeDate,
            NextMowingPattern = nextPattern
        };

        // Step 2.6: Pass the populated ViewModel to the view
        return View(viewModel);
    }

    public IActionResult Privacy()
    {
        return View();
    }

    [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
    public IActionResult Error()
    {
        return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });
    }
}