using Fitness_core_BE.Models;

namespace Fitness_core_BE.Interfaces
{
    public interface ICustomerSubscriptionRepository
    {
        Task AddCustomerSubscriptionAsync(
            CustomerSubscription subscription,
            CustomerSubItem initialSubItem,
            SubscriptionMember primaryMember,
            IReadOnlyCollection<SubscriptionInstallment> installments,
            CancellationToken ct = default);
        Task<CustomerPlan?> GetPlanByIdAsync(Guid customerPlanId, CancellationToken ct = default);
        Task<bool> IsActiveCustomerAsync(Guid customerId, CancellationToken ct = default);
        Task<List<CustomerSubItem>> GetSubItemsAsync(
            Guid subscriptionId,
            bool activeOnly,
            bool newestFirst,
            CancellationToken ct = default);
        Task AddSubItemAsync(CustomerSubItem subItem, CancellationToken ct = default);
        Task<CustomerInvoice?> GetLatestInvoiceAsync(Guid subscriptionId, CancellationToken ct = default);
        Task<decimal> GetApprovedPaymentTotalAsync(Guid invoiceId, CancellationToken ct = default);
        Task<CustomerCards?> GetCardByIdAsync(Guid cardId, CancellationToken ct = default);
        Task<CustomerSubscription?> GetCustomerSubscriptionById(Guid subscriptionId);
        Task<List<CustomerSubscription>> GetCustomerSubscriptionsByCustomerId(Guid customerId);
        /// <summary>True for an ordinary plan (no CustomerPlanClass links) or a class-linked
        /// plan with GrantsGymAccess == true.</summary>
        Task<bool> PlanGrantsGymAccessAsync(Guid customerPlanId, CancellationToken ct = default);

        /// <summary>The customer's active subscription whose plan grants gym access, if any --
        /// at most one can exist (enforced by HasActiveGymAccessPlanAsync at assignment time).
        /// Primary-only, same as the old GetActiveSubscriptionByCustomerId this replaces.</summary>
        Task<CustomerSubscription?> GetActiveGymAccessSubscriptionAsync(Guid customerId);

        /// <summary>The customer's active subscription on this exact plan, if any -- the
        /// idempotency check for re-assigning a class-only plan (which, unlike a gym plan,
        /// doesn't block on ANY other active plan, only a duplicate of itself).</summary>
        Task<CustomerSubscription?> GetActiveSubscriptionForPlanAsync(Guid customerId, Guid customerPlanId);

        /// <summary>The subscription that covers booking a specific class, preferring one with
        /// quota left this cycle. Null if none of the customer's active subscriptions link to
        /// this class at all.</summary>
        Task<CustomerSubscription?> GetActiveSubscriptionForClassAsync(Guid customerId, Guid facilityClassId);

        // Whether this customer is currently an active member (primary OR secondary/group) of
        // ANY gym-access subscription at this gym -- a class-only subscription never counts, so
        // unlimited concurrent class-only subscriptions are allowed. "One customer, one
        // GYM-ACCESS plan at a time" is enforced everywhere a gym plan gets assigned, not just
        // the primary path.
        Task<bool> HasActiveGymAccessPlanAsync(Guid customerId, CancellationToken ct = default);

        Task<SubscriptionMember> AddSubscriptionMemberAsync(SubscriptionMember member);
        Task<int> GetActiveMemberCountAsync(Guid subscriptionId);
        Task<SubscriptionMember?> GetSubscriptionMemberAsync(Guid subscriptionMemberId);
        Task<SubscriptionMember?> GetActiveSubscriptionMemberByCustomerAsync(Guid subscriptionId, Guid customerId);
        Task<List<CustomerSubscription>> GetSubscriptionsForCustomerAsync(Guid customerId);
        Task<List<SubscriptionInstallment>> GetInstallmentsAsync(Guid subscriptionId);

        // Renewal-approval workflow (SubscriptionRenewalApprovalService.ApproveAsync): advances
        // RenewalDate only -- ExpiryDate is never touched again after creation.
        Task AdvanceRenewalDateAsync(Guid subscriptionId, DateTime newRenewalDate, CancellationToken ct = default);

        // Removes the subscription's current-cycle installment rows before a fresh schedule is
        // added for the newly-approved cycle. Hard delete, not soft-deactivate: a unique index on
        // (FKSubscriptionId, InstallmentNo) means a soft-deactivated row would still collide with
        // the new cycle's schedule restarting at InstallmentNo 1 on the same subscription.
        Task DeactivatePriorInstallmentsAsync(Guid subscriptionId, CancellationToken ct = default);
        Task AddInstallmentsAsync(IReadOnlyCollection<SubscriptionInstallment> installments, CancellationToken ct = default);
    }
}