using Fitness_core_BE.Interfaces;
using Fitness_core_BE.Models;
using Microsoft.EntityFrameworkCore;

namespace Fitness_core_BE.Repos
{
    public class PairingCodeRepo : IPairingCodeRepo
    {
        // Central: created by platform Admin (no TenantId claim) and redeemed by an anonymous
        // agent enroll call (no tenant context at all yet). See CentralDbContext.PairingCodes.
        private readonly CentralDbContext _dbContext;

        public PairingCodeRepo(CentralDbContext dbContext)
        {
            _dbContext = dbContext;
        }

        public async Task<PairingCode> AddAsync(PairingCode pairingCode)
        {
            await _dbContext.PairingCodes.AddAsync(pairingCode);
            return pairingCode;
        }

        // Active = not used and not expired.
        public async Task<PairingCode?> GetActiveByCodeAsync(string code)
        {
            var now = DateTime.UtcNow;
            return await _dbContext.PairingCodes
                .FirstOrDefaultAsync(p => p.Code == code && !p.IsUsed && p.ExpiresAt > now);
        }

        public Task MarkUsedAsync(PairingCode pairingCode)
        {
            pairingCode.IsUsed = true;
            _dbContext.PairingCodes.Update(pairingCode);
            return Task.CompletedTask;
        }
    }
}