using Fitness_core_BE.Infra.Tenancy;
using Fitness_core_BE.Infra.UoW;
using Fitness_core_BE.Models;
using Fitness_core_BE.Repos;

namespace Fitness_core_BE.Services
{
    // The per-client overdue-lock algorithm, extracted verbatim from OverdueLockJob so the
    // admin "trigger now" endpoint (AdminBackgroundJobsController) can call the exact same code
    // path instead of duplicating it. Pure extraction -- no change to the locking logic itself.
    // Mirrors the SubscriptionRenewalRunner/SubscriptionRenewalJob split.
    public class OverdueLockRunner(ILogger<OverdueLockRunner> logger)
    {
        private readonly ILogger<OverdueLockRunner> _logger = logger;

        public async Task RunForClientAsync(Client client, DateTime now, TenantSchemaIterator iterator, CancellationToken ct)
        {
            await using var schemaCtx = await iterator.OpenSchemaForClientAsync(client.ClientId, ct);
            if (schemaCtx == null)
            {
                _logger.LogWarning(
                    "OverdueLockJob: client {ClientId} has a lock policy but no provisioned tenant schema; skipping.",
                    client.ClientId);
                return;
            }

            var repository = new OverdueLockRepository(schemaCtx.Tenant, schemaCtx.Central);
            var accessDeviceService = new AccessDeviceService(
                new EFUnitOfWork(schemaCtx.Central, schemaCtx.Tenant),
                new AccessDeviceRepo(schemaCtx.Tenant, schemaCtx.Central),
                new AttendanceRepository(schemaCtx.Tenant),
                new DeviceCommandRepo(schemaCtx.Tenant),
                new PairingCodeRepo(schemaCtx.Central));

            var effectiveDays = client.LockAfterDaysOverdue ?? Client.DefaultLockAfterDaysOverdue;
            var thresholdDate = now.AddDays(-effectiveDays);

            var overdueCustomerIds = await repository.GetOverdueCustomerIdsAsync(
                client.ClientId, thresholdDate, ct);

            foreach (var customerId in overdueCustomerIds)
            {
                var customer = await repository.GetCustomerByIdAsync(customerId, ct);
                if (customer == null)
                    continue;
                var alreadyLocked = await repository.IsCustomerAccessDisabledAsync(
                    client.ClientId, customer.FKUserId, ct);
                if (alreadyLocked)
                    continue;

                await accessDeviceService.SetCustomerAccessAsync(
                    client.ClientId, customerId, enabled: false, reason: "Overdue");
                _logger.LogInformation("Auto-locked customer {CustomerId} for client {ClientId} (overdue).", customerId, client.ClientId);
            }

            // Auto-unlock members who were locked for being overdue but are no longer
            // (paid, or their overdue invoice fell out of scope) — never touches manual locks.
            var lockedOverdueCustomerIds =
                await repository.GetCustomersLockedForOverdueAsync(client.ClientId, ct);

            foreach (var customerId in lockedOverdueCustomerIds.Except(overdueCustomerIds))
            {
                await accessDeviceService.SetCustomerAccessAsync(
                    client.ClientId, customerId, enabled: true, reason: null);
                _logger.LogInformation("Auto-unlocked customer {CustomerId} for client {ClientId} (no longer overdue).", customerId, client.ClientId);
            }
        }
    }
}