using Microsoft.EntityFrameworkCore;
using PowderCoating.Core.Entities;
using PowderCoating.Core.Enums;
using PowderCoating.Core.Interfaces.Repositories;
using PowderCoating.Infrastructure.Data;

namespace PowderCoating.Infrastructure.Repositories;

/// <summary>
/// Typed repository for <see cref="Bill"/> that provides domain-specific multi-level
/// include queries previously expressed inline in <c>BillsController</c>.
/// </summary>
public class BillRepository : Repository<Bill>, IBillRepository
{
    public BillRepository(ApplicationDbContext context) : base(context) { }

    /// <inheritdoc/>
    public async Task<Bill?> LoadForViewAsync(int id)
    {
        return await _context.Bills
            .Where(b => b.Id == id && !b.IsDeleted)
            .Include(b => b.Vendor)
            .Include(b => b.APAccount)
            .Include(b => b.LineItems.Where(li => !li.IsDeleted))
                .ThenInclude(li => li.Account)
            .Include(b => b.LineItems.Where(li => !li.IsDeleted))
                .ThenInclude(li => li.Job)
            .Include(b => b.Payments.Where(p => !p.IsDeleted))
                .ThenInclude(p => p.BankAccount)
            .FirstOrDefaultAsync();
    }

    /// <inheritdoc/>
    public async Task<Bill?> LoadForEditAsync(int id)
    {
        return await _context.Bills
            .Where(b => b.Id == id && !b.IsDeleted)
            .Include(b => b.LineItems.Where(li => !li.IsDeleted))
            .FirstOrDefaultAsync();
    }

    /// <inheritdoc/>
    public async Task<List<Bill>> GetForIndexAsync(string? statusFilter, string? searchTerm, decimal? searchAmount)
    {
        var query = _context.Bills
            .Include(b => b.Vendor)
            .Include(b => b.LineItems.Where(li => !li.IsDeleted))
            .Where(b => !b.IsDeleted);

        if (statusFilter == "Unpaid")
            query = query.Where(b => b.Status == BillStatus.Open || b.Status == BillStatus.PartiallyPaid);
        else if (statusFilter == "Overdue")
            query = query.Where(b => b.Status != BillStatus.Paid && b.Status != BillStatus.Voided &&
                                     b.DueDate.HasValue && b.DueDate.Value.Date < DateTime.Today);

        if (!string.IsNullOrEmpty(searchTerm))
        {
            var term = searchTerm;
            query = query.Where(b =>
                b.BillNumber.Contains(term) ||
                b.Vendor.CompanyName.Contains(term) ||
                (b.VendorInvoiceNumber != null && b.VendorInvoiceNumber.Contains(term)) ||
                (b.Memo != null && b.Memo.Contains(term)) ||
                b.LineItems.Any(li => li.Description.Contains(term)) ||
                (searchAmount.HasValue && (b.Total == searchAmount.Value || b.AmountPaid == searchAmount.Value)));
        }

        return await query.OrderByDescending(b => b.BillDate).ToListAsync();
    }

    /// <inheritdoc/>
    public async Task<string?> GetLastBillNumberAsync(string prefix)
    {
        return await _context.Bills
            .IgnoreQueryFilters()
            .Where(b => b.BillNumber.StartsWith(prefix))
            .OrderByDescending(b => b.BillNumber)
            .Select(b => b.BillNumber)
            .FirstOrDefaultAsync();
    }

    /// <inheritdoc/>
    public async Task<string?> GetLastPaymentNumberAsync(string prefix)
    {
        return await _context.BillPayments
            .IgnoreQueryFilters()
            .Where(p => p.PaymentNumber.StartsWith(prefix))
            .OrderByDescending(p => p.PaymentNumber)
            .Select(p => p.PaymentNumber)
            .FirstOrDefaultAsync();
    }
}