//
//  MainService.swift
//  Wallet
//
//  Created by Igor on 05.03.2021.
//  Copyright © 2021 AM. All rights reserved.
//

import UIKit
import Alamofire
import EosioSwift
import WalletNetwork
import class Resolver.ResolverScope
import struct Resolver.Injected

final class RuntimeConfiguration {
    var serverTimeDiff: Double = 0
    var currentTimestamp: Double { Date().timeIntervalSince1970 + serverTimeDiff }
    var dealsActiveOnly = true
}

extension Main {
    final class Service {

        struct Socket2Msg: Decodable {
            let payload: Socket2MsgPayload

            init(json: String) throws {
                self = try JSONDecoder().decode(Self.self, from: Data(json.utf8))
            }
        }
        struct Socket2MsgPayload: Decodable {
            let data: Socket2MsgPayloadData
        }
        struct Socket2MsgPayloadData: Decodable {
            let notifications: Socket2MsgNotification
        }
        struct Socket2MsgNotification: Decodable {
            let notificationType: String
            let state: String
            let payload: String
            let previousUid: String
            let currentUid: String

            var order: P2POrder? {
                try? JSONDecoder().decode(P2POrder.self, from: Data(payload.utf8))
            }
            var deal: P2PDeal? {
                try? JSONDecoder().decode(P2PDeal.self, from: Data(payload.utf8))
            }
            var balance: P2PBalance? {
                try? JSONDecoder().decode(P2PBalance.self, from: Data(payload.utf8))
            }
        }

        @Injected var runtimeConfiguration: RuntimeConfiguration
        @Injected var ordersService: P2POrdersService
        @Injected var dealsService: P2PMyDealsService
        @Injected var p2pBalancesService: P2PBalancesService
        @Injected var p2pListsService: P2PListsService

        init() {
            self.loadServerTime()
            Accounts().messageShelf.activeBook?.fetch()
            ResolverScope.userSession.reset()
            self.p2pListsService.fetch(completion: { _ in })
        }

        var previousUid: String?

        func processSocket(info: [AnyHashable: Any]?) {
            guard let info = info as? [String: String] else {
                return
            }
                if let json = info["data"] {
                    if let socketMsg = try? Socket2Msg(json: json) {
//                        print(previousUid)
//                        print(socketMsg.payload.data.notifications.previousUid)
//                        print(socketMsg.payload.data.notifications.currentUid)

                        if let previousUid = previousUid,
                           previousUid != socketMsg.payload.data.notifications.previousUid {
                            reloadP2PData(username: Accounts().current?.name ?? "")
                        }
                        previousUid = socketMsg.payload.data.notifications.currentUid

                        switch socketMsg.payload.data.notifications.notificationType.uppercased() {
                        case "P2P_ORDERS":
                            switch socketMsg.payload.data.notifications.state.uppercased() {
                            case "CREATED", "UPDATED":
                                if !ordersService.updateOrCreate(order: socketMsg.payload.data.notifications.order) {
                                    reloadP2PData(username: Accounts().current?.name ?? "")
                                }
                            case "DELETED":
                                if !ordersService.delete(order: socketMsg.payload.data.notifications.order) {
                                    reloadP2PData(username: Accounts().current?.name ?? "")
                                }
                            default:
                                break
                            }
                        case "P2P_DEALS":
                            switch socketMsg.payload.data.notifications.state.uppercased() {
                            case "CREATED", "UPDATED":
                                if !dealsService.updateOrCreate(deal: socketMsg.payload.data.notifications.deal) {
                                    reloadP2PData(username: Accounts().current?.name ?? "")
                                }
                            case "DELETED":
                                if !dealsService.delete(deal: socketMsg.payload.data.notifications.deal) {
                                    reloadP2PData(username: Accounts().current?.name ?? "")
                                }
                            default:
                                break
                            }
                        case "P2P_I_PAID":
                            if !dealsService.updateOrCreate(deal: socketMsg.payload.data.notifications.deal) {
                                reloadP2PData(username: Accounts().current?.name ?? "")
                            }
                        case "P2P_DEPOSITS":
                            if !p2pBalancesService.updateOrCreate(balance: socketMsg.payload.data.notifications.balance) {
                                reloadP2PData(username: Accounts().current?.name ?? "")
                            }
                        case "CHATS":
                            Accounts().messageShelf.activeBook?.fetch()
                        default:
                            break
                        }
                    }
                }
        }
        
        func reloadP2PData(username: String) {
//            ordersService.fetch(username: username) { _ in }
//            dealsService.fetch(username: username) { _ in }
//            p2pBalancesService.fetch(username: username) { _ in }

            ordersService.fetch(username: username) {
                if $0 == nil {
                    self.dealsService.fetch(username: username) {
                        if $0 == nil {
                            self.p2pBalancesService.fetch(username: username) {
                                if $0 == nil {
                                } else {
                                    delayed(5, { self.reloadP2PData(username: username) })
                                }
                            }
                        } else {
                            delayed(5, { self.reloadP2PData(username: username) })
                        }
                    }
                } else {
                    delayed(5, { self.reloadP2PData(username: username) })
                }
            }
        }

        func loadServerTime() {
            let environment = ApplicationEnvironment.shared().current
            
            guard let node = environment.node, 
                    let url = URL(string: node) else {
                return
            }
            
            EosioRpcProvider(endpoint: url, headers: environment.headers).getInfo(completion: { [weak self] result in
                switch result {
                case let .success(response):
    //                self?.runtimeConfiguration.serverTime = response.headBlockTime.asISODate() ?? Date()
                    self?.runtimeConfiguration.serverTimeDiff = (response.headBlockTime.asISODate() ?? Date()).timeIntervalSince1970 - Date().timeIntervalSince1970
                case .failure:
                    break
                }
            })
        }
        
        func loadNews() async -> [GetNewsGraphQLRequest.News] {
            let variables = GetNewsGraphQLRequest.Variables(langCode: Common.Model.Language.current.rawValue)

            let environment = ApplicationEnvironment.shared().current
            let news = try? await AF.request(
                environment.backend.urlPath,
                method: .post,
                parameters: GetNewsGraphQLRequest(variables: variables),
                encoder: JSONParameterEncoder.default,
                headers: HTTPHeaders(environment.headers)
            )
                .serializingDecodable(GraphQLResponse<GetNewsGraphQLRequest.ResponseData>.self)
                .value.data?.getNews ?? []

            print((news ?? []).filter { $0.deviceType.lowercased() == "ios" || $0.deviceType.lowercased() == "any" })

            return news?.filter({ $0.deviceType.lowercased() == "ios" || $0.deviceType.lowercased() == "any" }) ?? []
        }
    }
}