/*************************************************************************/
/*  in_app_store.mm                                                      */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
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#ifdef STOREKIT_ENABLED

#include "in_app_store.h"

extern "C" {
#import <Foundation/Foundation.h>
#import <StoreKit/StoreKit.h>
};

bool auto_finish_transactions = true;
NSMutableDictionary *pending_transactions = [NSMutableDictionary dictionary];
static NSArray *latestProducts;

@interface SKProduct (LocalizedPrice)

@property(nonatomic, readonly) NSString *localizedPrice;
@end

//----------------------------------//
// SKProduct extension
//----------------------------------//
@implementation SKProduct (LocalizedPrice)
- (NSString *)localizedPrice {
	NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
	[numberFormatter setFormatterBehavior:NSNumberFormatterBehavior10_4];
	[numberFormatter setNumberStyle:NSNumberFormatterCurrencyStyle];
	[numberFormatter setLocale:self.priceLocale];
	NSString *formattedString = [numberFormatter stringFromNumber:self.price];
	return formattedString;
}

@end

InAppStore *InAppStore::instance = NULL;

void InAppStore::_bind_methods() {
	ClassDB::bind_method(D_METHOD("request_product_info"), &InAppStore::request_product_info);
	ClassDB::bind_method(D_METHOD("restore_purchases"), &InAppStore::restore_purchases);
	ClassDB::bind_method(D_METHOD("purchase"), &InAppStore::purchase);

	ClassDB::bind_method(D_METHOD("get_pending_event_count"), &InAppStore::get_pending_event_count);
	ClassDB::bind_method(D_METHOD("pop_pending_event"), &InAppStore::pop_pending_event);
	ClassDB::bind_method(D_METHOD("finish_transaction"), &InAppStore::finish_transaction);
	ClassDB::bind_method(D_METHOD("set_auto_finish_transaction"), &InAppStore::set_auto_finish_transaction);
};

@interface ProductsDelegate : NSObject <SKProductsRequestDelegate> {
};

@end

@implementation ProductsDelegate

- (void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response {
	NSArray *products = response.products;
	latestProducts = products;

	Dictionary ret;
	ret["type"] = "product_info";
	ret["result"] = "ok";
	PackedStringArray titles;
	PackedStringArray descriptions;
	PackedFloat32Array prices;
	PackedStringArray ids;
	PackedStringArray localized_prices;
	PackedStringArray currency_codes;

	for (NSUInteger i = 0; i < [products count]; i++) {
		SKProduct *product = [products objectAtIndex:i];

		const char *str = [product.localizedTitle UTF8String];
		titles.push_back(String::utf8(str != NULL ? str : ""));

		str = [product.localizedDescription UTF8String];
		descriptions.push_back(String::utf8(str != NULL ? str : ""));
		prices.push_back([product.price doubleValue]);
		ids.push_back(String::utf8([product.productIdentifier UTF8String]));
		localized_prices.push_back(String::utf8([product.localizedPrice UTF8String]));
		currency_codes.push_back(String::utf8([[[product priceLocale] objectForKey:NSLocaleCurrencyCode] UTF8String]));
	};
	ret["titles"] = titles;
	ret["descriptions"] = descriptions;
	ret["prices"] = prices;
	ret["ids"] = ids;
	ret["localized_prices"] = localized_prices;
	ret["currency_codes"] = currency_codes;

	PackedStringArray invalid_ids;

	for (NSString *ipid in response.invalidProductIdentifiers) {
		invalid_ids.push_back(String::utf8([ipid UTF8String]));
	};
	ret["invalid_ids"] = invalid_ids;

	InAppStore::get_singleton()->_post_event(ret);
};

@end

Error InAppStore::request_product_info(Dictionary p_params) {
	ERR_FAIL_COND_V(!p_params.has("product_ids"), ERR_INVALID_PARAMETER);

	PackedStringArray pids = p_params["product_ids"];
	printf("************ request product info! %i\n", pids.size());

	NSMutableArray *array = [[NSMutableArray alloc] initWithCapacity:pids.size()];
	for (int i = 0; i < pids.size(); i++) {
		printf("******** adding %s to product list\n", pids[i].utf8().get_data());
		NSString *pid = [[NSString alloc] initWithUTF8String:pids[i].utf8().get_data()];
		[array addObject:pid];
	};

	NSSet *products = [[NSSet alloc] initWithArray:array];
	SKProductsRequest *request = [[SKProductsRequest alloc] initWithProductIdentifiers:products];

	ProductsDelegate *delegate = [[ProductsDelegate alloc] init];

	request.delegate = delegate;
	[request start];

	return OK;
};

Error InAppStore::restore_purchases() {
	printf("restoring purchases!\n");
	[[SKPaymentQueue defaultQueue] restoreCompletedTransactions];

	return OK;
};

@interface TransObserver : NSObject <SKPaymentTransactionObserver> {
};
@end

@implementation TransObserver

- (void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions {
	printf("transactions updated!\n");
	for (SKPaymentTransaction *transaction in transactions) {
		switch (transaction.transactionState) {
			case SKPaymentTransactionStatePurchased: {
				printf("status purchased!\n");
				String pid = String::utf8([transaction.payment.productIdentifier UTF8String]);
				String transactionId = String::utf8([transaction.transactionIdentifier UTF8String]);
				InAppStore::get_singleton()->_record_purchase(pid);
				Dictionary ret;
				ret["type"] = "purchase";
				ret["result"] = "ok";
				ret["product_id"] = pid;
				ret["transaction_id"] = transactionId;

				NSData *receipt = nil;
				int sdk_version = [[[UIDevice currentDevice] systemVersion] intValue];

				NSBundle *bundle = [NSBundle mainBundle];
				// Get the transaction receipt file path location in the app bundle.
				NSURL *receiptFileURL = [bundle appStoreReceiptURL];

				// Read in the contents of the transaction file.
				receipt = [NSData dataWithContentsOfURL:receiptFileURL];

				NSString *receipt_to_send = nil;
				if (receipt != nil) {
					receipt_to_send = [receipt base64EncodedStringWithOptions:0];
				}
				Dictionary receipt_ret;
				receipt_ret["receipt"] = String::utf8(receipt_to_send != nil ? [receipt_to_send UTF8String] : "");
				receipt_ret["sdk"] = sdk_version;
				ret["receipt"] = receipt_ret;

				InAppStore::get_singleton()->_post_event(ret);

				if (auto_finish_transactions) {
					[[SKPaymentQueue defaultQueue] finishTransaction:transaction];
				} else {
					[pending_transactions setObject:transaction forKey:transaction.payment.productIdentifier];
				}

			}; break;
			case SKPaymentTransactionStateFailed: {
				printf("status transaction failed!\n");
				String pid = String::utf8([transaction.payment.productIdentifier UTF8String]);
				Dictionary ret;
				ret["type"] = "purchase";
				ret["result"] = "error";
				ret["product_id"] = pid;
				ret["error"] = String::utf8([transaction.error.localizedDescription UTF8String]);
				InAppStore::get_singleton()->_post_event(ret);
				[[SKPaymentQueue defaultQueue] finishTransaction:transaction];
			} break;
			case SKPaymentTransactionStateRestored: {
				printf("status transaction restored!\n");
				String pid = String::utf8([transaction.originalTransaction.payment.productIdentifier UTF8String]);
				InAppStore::get_singleton()->_record_purchase(pid);
				Dictionary ret;
				ret["type"] = "restore";
				ret["result"] = "ok";
				ret["product_id"] = pid;
				InAppStore::get_singleton()->_post_event(ret);
				[[SKPaymentQueue defaultQueue] finishTransaction:transaction];
			} break;
			default: {
				printf("status default %i!\n", (int)transaction.transactionState);
			}; break;
		};
	};
};

@end

Error InAppStore::purchase(Dictionary p_params) {
	ERR_FAIL_COND_V(![SKPaymentQueue canMakePayments], ERR_UNAVAILABLE);
	if (![SKPaymentQueue canMakePayments])
		return ERR_UNAVAILABLE;

	printf("purchasing!\n");
	ERR_FAIL_COND_V(!p_params.has("product_id"), ERR_INVALID_PARAMETER);

	NSString *pid = [[NSString alloc] initWithUTF8String:String(p_params["product_id"]).utf8().get_data()];

	SKProduct *product = nil;

	if (latestProducts) {
		for (SKProduct *storedProduct in latestProducts) {
			if ([storedProduct.productIdentifier isEqualToString:pid]) {
				product = storedProduct;
				break;
			}
		}
	}

	if (!product) {
		return ERR_INVALID_PARAMETER;
	}

	SKPayment *payment = [SKPayment paymentWithProduct:product];
	SKPaymentQueue *defq = [SKPaymentQueue defaultQueue];
	[defq addPayment:payment];
	printf("purchase sent!\n");

	return OK;
};

int InAppStore::get_pending_event_count() {
	return pending_events.size();
};

Variant InAppStore::pop_pending_event() {
	Variant front = pending_events.front()->get();
	pending_events.pop_front();

	return front;
};

void InAppStore::_post_event(Variant p_event) {
	pending_events.push_back(p_event);
};

void InAppStore::_record_purchase(String product_id) {
	String skey = "purchased/" + product_id;
	NSString *key = [[NSString alloc] initWithUTF8String:skey.utf8().get_data()];
	[[NSUserDefaults standardUserDefaults] setBool:YES forKey:key];
	[[NSUserDefaults standardUserDefaults] synchronize];
};

InAppStore *InAppStore::get_singleton() {
	return instance;
};

InAppStore::InAppStore() {
	ERR_FAIL_COND(instance != NULL);
	instance = this;
	auto_finish_transactions = false;

	TransObserver *observer = [[TransObserver alloc] init];
	[[SKPaymentQueue defaultQueue] addTransactionObserver:observer];
	//pending_transactions = [NSMutableDictionary dictionary];
};

void InAppStore::finish_transaction(String product_id) {
	NSString *prod_id = [NSString stringWithCString:product_id.utf8().get_data() encoding:NSUTF8StringEncoding];

	if ([pending_transactions objectForKey:prod_id]) {
		[[SKPaymentQueue defaultQueue] finishTransaction:[pending_transactions objectForKey:prod_id]];
		[pending_transactions removeObjectForKey:prod_id];
	}
};

void InAppStore::set_auto_finish_transaction(bool b) {
	auto_finish_transactions = b;
}

InAppStore::~InAppStore() {}

#endif