using System.Text.Json;
using Tiku.Domain.Common;

namespace Tiku.Domain.Commerce;

public sealed class Product : AuditableTenantEntity
{
    public Guid? RegionId { get; set; }
    public string? LegacyId { get; set; }
    public string Title { get; set; } = string.Empty;
    public string? LegacyPriceText { get; set; }
    public string? Link { get; set; }
    public ProductType Type { get; set; } = ProductType.Material;
    public JsonElement Tags { get; set; } = JsonDefaults.Array();
    public int SortOrder { get; set; }
    public string? Cover { get; set; }
    public string? PreviewIframe { get; set; }
    public JsonElement DetailImages { get; set; } = JsonDefaults.Array();
}

public sealed class SvipPlan : AuditableTenantEntity
{
    public Guid? RegionId { get; set; }
    public string? LegacyId { get; set; }
    public string Name { get; set; } = string.Empty;
    public int PriceCents { get; set; }
    public int? OriginalPriceCents { get; set; }
    public int Days { get; set; }
    public string? Description { get; set; }
    public string? PerDayLabel { get; set; }
    public string? Badge { get; set; }
    public bool Recommended { get; set; }
    public bool CouponOnly { get; set; }
    public string? VpProductId { get; set; }
    public bool VpEnabled { get; set; }
    public int SortOrder { get; set; }
    public bool IsActive { get; set; } = true;
}

public sealed class Order : AuditableTenantEntity
{
    public Guid? UserId { get; set; }
    public Guid? PlanId { get; set; }
    public Guid? RegionId { get; set; }
    public string? LegacyId { get; set; }
    public string? LegacyUserId { get; set; }
    public string? LegacyPlanId { get; set; }
    public string? LegacyRegionId { get; set; }
    public string OrderNo { get; set; } = string.Empty;
    public OrderStatus Status { get; set; } = OrderStatus.Pending;
    public string? ProductType { get; set; }
    public string? ProductName { get; set; }
    public int AmountCents { get; set; }
    public string? PayMethod { get; set; }
    public string? PayProvider { get; set; }
    public string? TradeNo { get; set; }
    public int? Days { get; set; }
    public DateTimeOffset? PaidAt { get; set; }
    public JsonElement RawPayload { get; set; } = JsonDefaults.Object();
}

public sealed class OrderItem : AuditableTenantEntity
{
    public Guid OrderId { get; set; }
    public string? LegacyId { get; set; }
    public string ItemType { get; set; } = string.Empty;
    public Guid? ItemId { get; set; }
    public string Name { get; set; } = string.Empty;
    public int Quantity { get; set; } = 1;
    public int UnitAmountCents { get; set; }
    public int TotalAmountCents { get; set; }
    public JsonElement Metadata { get; set; } = JsonDefaults.Object();
}

public sealed class Payment : AuditableTenantEntity
{
    public Guid OrderId { get; set; }
    public string? LegacyId { get; set; }
    public string? LegacyOrderId { get; set; }
    public string Provider { get; set; } = string.Empty;
    public string? Method { get; set; }
    public PaymentStatus Status { get; set; } = PaymentStatus.Pending;
    public int AmountCents { get; set; }
    public string? ProviderTradeNo { get; set; }
    public DateTimeOffset? PaidAt { get; set; }
    public JsonElement RawPayload { get; set; } = JsonDefaults.Object();
}

public sealed class PaymentEvent : Entity
{
    public Guid TenantId { get; set; }
    public Guid? PaymentId { get; set; }
    public string Provider { get; set; } = string.Empty;
    public string EventType { get; set; } = string.Empty;
    public string? EventId { get; set; }
    public bool? SignatureValid { get; set; }
    public JsonElement Payload { get; set; } = JsonDefaults.Object();
    public DateTimeOffset? ProcessedAt { get; set; }
    public string? Error { get; set; }
    public DateTimeOffset CreatedAt { get; set; } = DateTimeOffset.UtcNow;
}

public sealed class Entitlement : Entity
{
    public Guid TenantId { get; set; }
    public Guid UserId { get; set; }
    public string EntitlementType { get; set; } = "svip";
    public EntitlementScopeType ScopeType { get; set; } = EntitlementScopeType.Tenant;
    public Guid? ScopeId { get; set; }
    public string SourceType { get; set; } = "migration";
    public Guid? SourceId { get; set; }
    public string? LegacySourceId { get; set; }
    public DateTimeOffset StartsAt { get; set; } = DateTimeOffset.UtcNow;
    public DateTimeOffset? ExpiresAt { get; set; }
    public EntitlementStatus Status { get; set; } = EntitlementStatus.Active;
    public JsonElement Metadata { get; set; } = JsonDefaults.Object();
    public DateTimeOffset CreatedAt { get; set; } = DateTimeOffset.UtcNow;
}

public sealed class CodeBatch : AuditableTenantEntity
{
    public Guid? RegionId { get; set; }
    public Guid? CreatedBy { get; set; }
    public string? LegacyId { get; set; }
    public string Name { get; set; } = string.Empty;
    public string? SaleType { get; set; }
    public string? Channel { get; set; }
    public string? CampaignName { get; set; }
    public int DefaultUnitPriceCents { get; set; }
    public int CostPriceCents { get; set; }
    public int TotalCount { get; set; }
    public int? Days { get; set; }
    public string? LegacyRegionId { get; set; }
    public DateTimeOffset? IssuedAt { get; set; }
    public string? Remark { get; set; }
    public decimal? CommissionRate { get; set; }
}

public sealed class ActivationCode : AuditableTenantEntity
{
    public Guid? UsedBy { get; set; }
    public Guid? AgentUserId { get; set; }
    public Guid? BatchId { get; set; }
    public Guid? UsedRegionId { get; set; }
    public Guid? CouponRedemptionId { get; set; }
    public string? LegacyId { get; set; }
    public string Code { get; set; } = string.Empty;
    public int Days { get; set; }
    public bool IsUsed { get; set; }
    public DateTimeOffset? UsedAt { get; set; }
    public string? SaleType { get; set; }
    public int? UnitPriceCents { get; set; }
    public string? SoldTo { get; set; }
    public string? CouponCode { get; set; }
    public string? Remark { get; set; }
}

public sealed class Coupon : AuditableTenantEntity
{
    public Guid? PlanId { get; set; }
    public string? LegacyId { get; set; }
    public string Code { get; set; } = string.Empty;
    public DiscountType? DiscountType { get; set; }
    public decimal? DiscountValue { get; set; }
    public DateTimeOffset? ValidFrom { get; set; }
    public DateTimeOffset? ValidTo { get; set; }
    public int? MaxUses { get; set; }
    public int UsedCount { get; set; }
    public string? Source { get; set; }
    public string? Remark { get; set; }
}

public sealed class CouponRedemption : AuditableTenantEntity
{
    public Guid? CouponId { get; set; }
    public Guid? UserId { get; set; }
    public Guid? PlanId { get; set; }
    public Guid? OrderId { get; set; }
    public Guid? RegionId { get; set; }
    public string? LegacyId { get; set; }
    public string? CouponCode { get; set; }
    public CouponRedemptionStatus Status { get; set; } = CouponRedemptionStatus.Claimed;
    public int? DiscountAppliedCents { get; set; }
    public string? Source { get; set; }
    public string? Remark { get; set; }
    public DateTimeOffset? ClaimedAt { get; set; }
    public DateTimeOffset? UsedAt { get; set; }
}

public sealed class TenantPaymentAccount : AuditableTenantEntity
{
    public string Provider { get; set; } = string.Empty;
    public TenantPaymentMode Mode { get; set; } = TenantPaymentMode.PlatformCollect;
    public string? DisplayName { get; set; }
    public TenantPaymentAccountStatus Status { get; set; } = TenantPaymentAccountStatus.Disabled;
    public JsonElement ConfigPublic { get; set; } = JsonDefaults.Object();
}

public sealed class TenantSubscription : AuditableTenantEntity
{
    public string PlanCode { get; set; } = string.Empty;
    public TenantSubscriptionStatus Status { get; set; } = TenantSubscriptionStatus.Trial;
    public DateTimeOffset? StartsAt { get; set; }
    public DateTimeOffset? ExpiresAt { get; set; }
    public string? BillingCycle { get; set; } = "yearly";
    public int AmountCents { get; set; }
    public JsonElement Metadata { get; set; } = JsonDefaults.Object();
}

public sealed class TenantUsageRecord : Entity
{
    public Guid TenantId { get; set; }
    public string MetricKey { get; set; } = string.Empty;
    public decimal MetricValue { get; set; }
    public DateOnly PeriodStart { get; set; }
    public DateOnly PeriodEnd { get; set; }
    public JsonElement Metadata { get; set; } = JsonDefaults.Object();
    public DateTimeOffset CreatedAt { get; set; } = DateTimeOffset.UtcNow;
}

public enum ProductType { Material, Course, Service, Link, Other }
public enum OrderStatus { Pending, Paid, Failed, Closed, Refunded }
public enum PaymentStatus { Pending, Paid, Failed, Cancelled, Refunded }
public enum EntitlementScopeType { Tenant, Region, Module, Subject, QuestionBank }
public enum EntitlementStatus { Active, Revoked, Expired }
public enum DiscountType { Percent, Fixed }
public enum CouponRedemptionStatus { Claimed, Used, Expired, Cancelled }
public enum TenantPaymentMode { PlatformCollect, TenantCollect, ServiceProvider }
public enum TenantPaymentAccountStatus { Active, Disabled, Pending }
public enum TenantSubscriptionStatus { Trial, Active, PastDue, Cancelled }