using Microsoft.EntityFrameworkCore;
using BudgetApp.Data;

namespace BudgetApp.Services;

public class AccountService
{
    private readonly ApplicationDbContext _db;

    public AccountService(ApplicationDbContext db)
    {
        _db = db;
    }

    public async Task<List<Account>> GetAccountsAsync(string userId)
    {
        return await _db.Accounts
            .Where(a => a.UserId == userId)
            .OrderBy(a => a.Name)
            .ToListAsync();
    }

    public async Task<Account?> GetAccountAsync(int id, string userId)
    {
        return await _db.Accounts
            .FirstOrDefaultAsync(a => a.Id == id && a.UserId == userId);
    }

    public async Task CreateAccountAsync(Account account)
    {
        _db.Accounts.Add(account);
        await _db.SaveChangesAsync();
    }

    public async Task UpdateAccountAsync(Account account)
    {
        _db.Accounts.Update(account);
        await _db.SaveChangesAsync();
    }

    public async Task UpdateBalanceAsync(int id, string userId, decimal newBalance)
    {
        var account = await _db.Accounts
            .FirstOrDefaultAsync(a => a.Id == id && a.UserId == userId);
        if (account is not null)
        {
            account.CurrentBalance = newBalance;
            await _db.SaveChangesAsync();
        }
    }

    public async Task UpdateAccountDetailsAsync(int id, string userId, string name, string color, string currencyCode)
    {
        var account = await _db.Accounts
            .FirstOrDefaultAsync(a => a.Id == id && a.UserId == userId);
        if (account is not null)
        {
            account.Name = name;
            account.Color = color;
            account.CurrencyCode = currencyCode;
            await _db.SaveChangesAsync();
        }
    }

    public async Task DeleteAccountAsync(int id, string userId)
    {
        var account = await _db.Accounts
            .FirstOrDefaultAsync(a => a.Id == id && a.UserId == userId);
        if (account is not null)
        {
            _db.Accounts.Remove(account);
            await _db.SaveChangesAsync();
        }
    }
}