using System;
using System.Linq;
using System.Collections.Generic;
using Bit.Core.Models.Business;
using Bit.Core.Models.Table;

namespace Bit.Core.Models.Api
{
    public class SubscriptionResponseModel : ResponseModel
    {
        public SubscriptionResponseModel(User user, SubscriptionInfo subscription, UserLicense license)
            : base("subscription")
        {
            Subscription = subscription.Subscription != null ? new BillingSubscription(subscription.Subscription) : null;
            UpcomingInvoice = subscription.UpcomingInvoice != null ?
                new BillingSubscriptionUpcomingInvoice(subscription.UpcomingInvoice) : null;
            StorageName = user.Storage.HasValue ? Utilities.CoreHelpers.ReadableBytesSize(user.Storage.Value) : null;
            StorageGb = user.Storage.HasValue ? Math.Round(user.Storage.Value / 1073741824D, 2) : 0; // 1 GB
            MaxStorageGb = user.MaxStorageGb;
            License = license;
            Expiration = License.Expires;
            UsingInAppPurchase = subscription.UsingInAppPurchase;
        }

        public SubscriptionResponseModel(User user, UserLicense license = null)
            : base("subscription")
        {
            StorageName = user.Storage.HasValue ? Utilities.CoreHelpers.ReadableBytesSize(user.Storage.Value) : null;
            StorageGb = user.Storage.HasValue ? Math.Round(user.Storage.Value / 1073741824D, 2) : 0; // 1 GB
            MaxStorageGb = user.MaxStorageGb;
            Expiration = user.PremiumExpirationDate;

            if (license != null)
            {
                License = license;
            }
        }

        public string StorageName { get; set; }
        public double? StorageGb { get; set; }
        public short? MaxStorageGb { get; set; }
        public BillingSubscriptionUpcomingInvoice UpcomingInvoice { get; set; }
        public BillingSubscription Subscription { get; set; }
        public UserLicense License { get; set; }
        public DateTime? Expiration { get; set; }
        public bool UsingInAppPurchase { get; set; }
    }

    public class BillingSubscription
    {
        public BillingSubscription(SubscriptionInfo.BillingSubscription sub)
        {
            Status = sub.Status;
            TrialStartDate = sub.TrialStartDate;
            TrialEndDate = sub.TrialEndDate;
            PeriodStartDate = sub.PeriodStartDate;
            PeriodEndDate = sub.PeriodEndDate;
            CancelledDate = sub.CancelledDate;
            CancelAtEndDate = sub.CancelAtEndDate;
            Cancelled = sub.Cancelled;
            if (sub.Items != null)
            {
                Items = sub.Items.Select(i => new BillingSubscriptionItem(i));
            }
        }

        public DateTime? TrialStartDate { get; set; }
        public DateTime? TrialEndDate { get; set; }
        public DateTime? PeriodStartDate { get; set; }
        public DateTime? PeriodEndDate { get; set; }
        public DateTime? CancelledDate { get; set; }
        public bool CancelAtEndDate { get; set; }
        public string Status { get; set; }
        public bool Cancelled { get; set; }
        public IEnumerable<BillingSubscriptionItem> Items { get; set; } = new List<BillingSubscriptionItem>();

        public class BillingSubscriptionItem
        {
            public BillingSubscriptionItem(SubscriptionInfo.BillingSubscription.BillingSubscriptionItem item)
            {
                Name = item.Name;
                Amount = item.Amount;
                Interval = item.Interval;
                Quantity = item.Quantity;
                SponsoredSubscriptionItem = item.SponsoredSubscriptionItem;
            }

            public string Name { get; set; }
            public decimal Amount { get; set; }
            public int Quantity { get; set; }
            public string Interval { get; set; }
            public bool SponsoredSubscriptionItem { get; set; }
        }
    }

    public class BillingSubscriptionUpcomingInvoice
    {
        public BillingSubscriptionUpcomingInvoice(SubscriptionInfo.BillingUpcomingInvoice inv)
        {
            Amount = inv.Amount;
            Date = inv.Date;
        }

        public decimal Amount { get; set; }
        public DateTime? Date { get; set; }
    }
}