// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'dart:ui' show hashValues;
import 'package:flutter/foundation.dart';
import 'package:collection/collection.dart';
import 'package:json_annotation/json_annotation.dart';

// WARNING: Changes to `@JsonSerializable` classes need to be reflected in the
// below generated file. Run `flutter packages pub run build_runner watch` to
// rebuild and watch for further changes.
part 'sk_product_wrapper.g.dart';

/// Dart wrapper around StoreKit's [SKProductsResponse](https://developer.apple.com/documentation/storekit/skproductsresponse?language=objc).
///
/// Represents the response object returned by [SKRequestMaker.startProductRequest].
/// Contains information about a list of products and a list of invalid product identifiers.
@JsonSerializable()
class SkProductResponseWrapper {
  /// Creates an [SkProductResponseWrapper] with the given product details.
  SkProductResponseWrapper(
      {@required this.products, @required this.invalidProductIdentifiers});

  /// Constructing an instance from a map from the Objective-C layer.
  ///
  /// This method should only be used with `map` values returned by [SKRequestMaker.startProductRequest].
  /// The `map` parameter must not be null.
  factory SkProductResponseWrapper.fromJson(Map<String, dynamic> map) {
    assert(map != null, 'Map must not be null.');
    return _$SkProductResponseWrapperFromJson(map);
  }

  /// Stores all matching successfully found products.
  ///
  /// One product in this list matches one valid product identifier passed to the [SKRequestMaker.startProductRequest].
  /// Will be empty if the [SKRequestMaker.startProductRequest] method does not pass any correct product identifier.
  final List<SKProductWrapper> products;

  /// Stores product identifiers in the `productIdentifiers` from [SKRequestMaker.startProductRequest] that are not recognized by the App Store.
  ///
  /// The App Store will not recognize a product identifier unless certain criteria are met. A detailed list of the criteria can be
  /// found here https://developer.apple.com/documentation/storekit/skproductsresponse/1505985-invalidproductidentifiers?language=objc.
  /// Will be empty if all the product identifiers are valid.
  final List<String> invalidProductIdentifiers;

  @override
  bool operator ==(Object other) {
    if (identical(other, this)) {
      return true;
    }
    if (other.runtimeType != runtimeType) {
      return false;
    }
    final SkProductResponseWrapper typedOther = other;
    return DeepCollectionEquality().equals(typedOther.products, products) &&
        DeepCollectionEquality().equals(
            typedOther.invalidProductIdentifiers, invalidProductIdentifiers);
  }

  @override
  int get hashCode => hashValues(this.products, this.invalidProductIdentifiers);
}

/// Dart wrapper around StoreKit's [SKProductPeriodUnit](https://developer.apple.com/documentation/storekit/skproductperiodunit?language=objc).
///
/// Used as a property in the [SKProductSubscriptionPeriodWrapper]. Minimum is a day and maximum is a year.
// The values of the enum options are matching the [SKProductPeriodUnit]'s values. Should there be an update or addition
// in the [SKProductPeriodUnit], this need to be updated to match.
enum SKSubscriptionPeriodUnit {
  /// An interval lasting one day.
  @JsonValue(0)
  day,

  /// An interval lasting one month.
  @JsonValue(1)

  /// An interval lasting one week.
  week,
  @JsonValue(2)

  /// An interval lasting one month.
  month,

  /// An interval lasting one year.
  @JsonValue(3)
  year,
}

/// Dart wrapper around StoreKit's [SKProductSubscriptionPeriod](https://developer.apple.com/documentation/storekit/skproductsubscriptionperiod?language=objc).
///
/// A period is defined by a [numberOfUnits] and a [unit], e.g for a 3 months period [numberOfUnits] is 3 and [unit] is a month.
/// It is used as a property in [SKProductDiscountWrapper] and [SKProductWrapper].
@JsonSerializable(nullable: true)
class SKProductSubscriptionPeriodWrapper {
  /// Creates an [SKProductSubscriptionPeriodWrapper] for a `numberOfUnits`x`unit` period.
  SKProductSubscriptionPeriodWrapper(
      {@required this.numberOfUnits, @required this.unit});

  /// Constructing an instance from a map from the Objective-C layer.
  ///
  /// This method should only be used with `map` values returned by [SKProductDiscountWrapper.fromJson] or [SKProductWrapper.fromJson].
  /// The `map` parameter must not be null.
  factory SKProductSubscriptionPeriodWrapper.fromJson(Map map) {
    assert(map != null, 'Map must not be null.');
    return _$SKProductSubscriptionPeriodWrapperFromJson(map);
  }

  /// The number of [unit] units in this period.
  ///
  /// Must be greater than 0.
  final int numberOfUnits;

  /// The time unit used to specify the length of this period.
  final SKSubscriptionPeriodUnit unit;

  @override
  bool operator ==(Object other) {
    if (identical(other, this)) {
      return true;
    }
    if (other.runtimeType != runtimeType) {
      return false;
    }
    final SKProductSubscriptionPeriodWrapper typedOther = other;
    return typedOther.numberOfUnits == numberOfUnits && typedOther.unit == unit;
  }

  @override
  int get hashCode => hashValues(this.numberOfUnits, this.unit);
}

/// Dart wrapper around StoreKit's [SKProductDiscountPaymentMode](https://developer.apple.com/documentation/storekit/skproductdiscountpaymentmode?language=objc).
///
/// This is used as a property in the [SKProductDiscountWrapper].
// The values of the enum options are matching the [SKProductDiscountPaymentMode]'s values. Should there be an update or addition
// in the [SKProductDiscountPaymentMode], this need to be updated to match.
enum SKProductDiscountPaymentMode {
  /// Allows user to pay the discounted price at each payment period.
  @JsonValue(0)
  payAsYouGo,

  /// Allows user to pay the discounted price upfront and receive the product for the rest of time that was paid for.
  @JsonValue(1)
  payUpFront,

  /// User pays nothing during the discounted period.
  @JsonValue(2)
  freeTrail,
}

/// Dart wrapper around StoreKit's [SKProductDiscount](https://developer.apple.com/documentation/storekit/skproductdiscount?language=objc).
///
/// It is used as a property in [SKProductWrapper].
@JsonSerializable(nullable: true)
class SKProductDiscountWrapper {
  /// Creates an [SKProductDiscountWrapper] with the given discount details.
  SKProductDiscountWrapper(
      {@required this.price,
      @required this.priceLocale,
      @required this.numberOfPeriods,
      @required this.paymentMode,
      @required this.subscriptionPeriod});

  /// Constructing an instance from a map from the Objective-C layer.
  ///
  /// This method should only be used with `map` values returned by [SKProductWrapper.fromJson].
  /// The `map` parameter must not be null.
  factory SKProductDiscountWrapper.fromJson(Map map) {
    assert(map != null, 'Map must not be null.');
    return _$SKProductDiscountWrapperFromJson(map);
  }

  /// The discounted price, in the currency that is defined in [priceLocale].
  final String price;

  /// Includes locale information about the price, e.g. `$` as the currency symbol for US locale.
  final SKPriceLocaleWrapper priceLocale;

  /// The object represent the discount period length.
  ///
  /// The value must be >= 0.
  final int numberOfPeriods;

  /// The object indicates how the discount price is charged.
  final SKProductDiscountPaymentMode paymentMode;

  /// The object represents the duration of single subscription period for the discount.
  ///
  /// The [subscriptionPeriod] of the discount is independent of the product's [subscriptionPeriod],
  /// and their units and duration do not have to be matched.
  final SKProductSubscriptionPeriodWrapper subscriptionPeriod;

  @override
  bool operator ==(Object other) {
    if (identical(other, this)) {
      return true;
    }
    if (other.runtimeType != runtimeType) {
      return false;
    }
    final SKProductDiscountWrapper typedOther = other;
    return typedOther.price == price &&
        typedOther.priceLocale == priceLocale &&
        typedOther.numberOfPeriods == numberOfPeriods &&
        typedOther.paymentMode == paymentMode &&
        typedOther.subscriptionPeriod == subscriptionPeriod;
  }

  @override
  int get hashCode => hashValues(this.price, this.priceLocale,
      this.numberOfPeriods, this.paymentMode, this.subscriptionPeriod);
}

/// Dart wrapper around StoreKit's [SKProduct](https://developer.apple.com/documentation/storekit/skproduct?language=objc).
///
/// A list of [SKProductWrapper] is returned in the [SKRequestMaker.startProductRequest] method, and
/// should be stored for use when making a payment.
@JsonSerializable(nullable: true)
class SKProductWrapper {
  /// Creates an [SKProductWrapper] with the given product details.
  SKProductWrapper({
    @required this.productIdentifier,
    @required this.localizedTitle,
    @required this.localizedDescription,
    @required this.priceLocale,
    @required this.subscriptionGroupIdentifier,
    @required this.price,
    @required this.subscriptionPeriod,
    @required this.introductoryPrice,
  });

  /// Constructing an instance from a map from the Objective-C layer.
  ///
  /// This method should only be used with `map` values returned by [SkProductResponseWrapper.fromJson].
  /// The `map` parameter must not be null.
  factory SKProductWrapper.fromJson(Map map) {
    assert(map != null, 'Map must not be null.');
    return _$SKProductWrapperFromJson(map);
  }

  /// The unique identifier of the product.
  final String productIdentifier;

  /// The localizedTitle of the product.
  ///
  /// It is localized based on the current locale.
  final String localizedTitle;

  /// The localized description of the product.
  ///
  /// It is localized based on the current locale.
  final String localizedDescription;

  /// Includes locale information about the price, e.g. `$` as the currency symbol for US locale.
  final SKPriceLocaleWrapper priceLocale;

  /// The subscription group identifier.
  ///
  /// A subscription group is a collection of subscription products.
  /// Check [SubscriptionGroup](https://developer.apple.com/app-store/subscriptions/) for more details about subscription group.
  final String subscriptionGroupIdentifier;

  /// The price of the product, in the currency that is defined in [priceLocale].
  final String price;

  /// The object represents the subscription period of the product.
  ///
  /// Can be [null] is the product is not a subscription.
  final SKProductSubscriptionPeriodWrapper subscriptionPeriod;

  /// The object represents the duration of single subscription period.
  ///
  /// This is only available if you set up the introductory price in the App Store Connect, otherwise it will be null.
  /// Programmer is also responsible to determine if the user is eligible to receive it. See https://developer.apple.com/documentation/storekit/in-app_purchase/offering_introductory_pricing_in_your_app?language=objc
  /// for more details.
  /// The [subscriptionPeriod] of the discount is independent of the product's [subscriptionPeriod],
  /// and their units and duration do not have to be matched.
  final SKProductDiscountWrapper introductoryPrice;

  @override
  bool operator ==(Object other) {
    if (identical(other, this)) {
      return true;
    }
    if (other.runtimeType != runtimeType) {
      return false;
    }
    final SKProductWrapper typedOther = other;
    return typedOther.productIdentifier == productIdentifier &&
        typedOther.localizedTitle == localizedTitle &&
        typedOther.localizedDescription == localizedDescription &&
        typedOther.priceLocale == priceLocale &&
        typedOther.subscriptionGroupIdentifier == subscriptionGroupIdentifier &&
        typedOther.price == price &&
        typedOther.subscriptionPeriod == subscriptionPeriod &&
        typedOther.introductoryPrice == introductoryPrice;
  }

  @override
  int get hashCode => hashValues(
      this.productIdentifier,
      this.localizedTitle,
      this.localizedDescription,
      this.priceLocale,
      this.subscriptionGroupIdentifier,
      this.price,
      this.subscriptionPeriod,
      this.introductoryPrice);
}

/// Object that indicates the locale of the price
///
/// It is a thin wrapper of [NSLocale](https://developer.apple.com/documentation/foundation/nslocale?language=objc).
// TODO(cyanglaz): NSLocale is a complex object, want to see the actual need of getting this expanded.
//                 Matching android to only get the currencySymbol for now.
//                 https://github.com/flutter/flutter/issues/26610
@JsonSerializable()
class SKPriceLocaleWrapper {
  /// Creates a new price locale for `currencySymbol` and `currencyCode`.
  SKPriceLocaleWrapper(
      {@required this.currencySymbol, @required this.currencyCode});

  /// Constructing an instance from a map from the Objective-C layer.
  ///
  /// This method should only be used with `map` values returned by [SKProductWrapper.fromJson] and [SKProductDiscountWrapper.fromJson].
  /// The `map` parameter must not be null.
  factory SKPriceLocaleWrapper.fromJson(Map map) {
    assert(map != null, 'Map must not be null.');
    return _$SKPriceLocaleWrapperFromJson(map);
  }

  ///The currency symbol for the locale, e.g. $ for US locale.
  final String currencySymbol;

  ///The currency code for the locale, e.g. USD for US locale.
  final String currencyCode;

  @override
  bool operator ==(Object other) {
    if (identical(other, this)) {
      return true;
    }
    if (other.runtimeType != runtimeType) {
      return false;
    }
    final SKPriceLocaleWrapper typedOther = other;
    return typedOther.currencySymbol == currencySymbol &&
        typedOther.currencyCode == currencyCode;
  }

  @override
  int get hashCode => hashValues(this.currencySymbol, this.currencyCode);
}