//
//  LiveReservationStatusViewModel.swift
//  SodaLive
//
//  Created by klaus on 2023/08/11.
//

import Foundation
import Combine

final class LiveReservationStatusViewModel: ObservableObject {
    
    private let repository = LiveRepository()
    private var subscription = Set<AnyCancellable>()
    
    @Published var errorMessage = ""
    @Published var isShowPopup = false
    @Published var isLoading = false
    
    @Published var reservationStatusItems = [GetLiveReservationResponse]()
    @Published var selectedReservationStatusItem: GetLiveReservationResponse?
    
    let cancelReasons = [
        I18n.MyPage.Reservation.Cancel.reasonPersonalSchedule,
        I18n.MyPage.Reservation.Cancel.reasonOtherLive,
        I18n.MyPage.Reservation.Cancel.reasonUncomfortableParticipant,
        I18n.MyPage.Reservation.Cancel.reasonPriceBurden,
        I18n.MyPage.Reservation.Cancel.reasonEtc
    ]
    @Published var cancelReasonSelectedIndex = -1
    @Published var reason = ""
    
    @Published var isCancelComplete = false
    
    func getLiveReservationStatus() {
        isLoading = true
        
        repository.getReservations(isActive: true)
            .sink { result in
                switch result {
                case .finished:
                    DEBUG_LOG("finish")
                case .failure(let error):
                    ERROR_LOG(error.localizedDescription)
                }
            } receiveValue: { [unowned self] response in
                self.isLoading = false
                let responseData = response.data
                
                do {
                    let jsonDecoder = JSONDecoder()
                    let decoded = try jsonDecoder.decode(ApiResponse<[GetLiveReservationResponse]>.self, from: responseData)
                    
                    if let data = decoded.data, decoded.success {
                        self.reservationStatusItems.append(contentsOf: data)
                    } else {
                        if let message = decoded.message {
                            self.errorMessage = message
                        } else {
                            self.errorMessage = I18n.Common.commonError
                        }
                        
                        self.isShowPopup = true
                    }
                } catch {
                    self.errorMessage = I18n.Common.commonError
                    self.isShowPopup = true
                }
            }
            .store(in: &subscription)
    }
    
    func getReservation(reservationId: Int) {
        isLoading = true
        
        repository.getReservation(reservationId: reservationId)
            .sink { result in
                switch result {
                case .finished:
                    DEBUG_LOG("finish")
                case .failure(let error):
                    ERROR_LOG(error.localizedDescription)
                }
            } receiveValue: { [unowned self] response in
                self.isLoading = false
                let responseData = response.data
                
                do {
                    let jsonDecoder = JSONDecoder()
                    let decoded = try jsonDecoder.decode(ApiResponse<GetLiveReservationResponse>.self, from: responseData)
                    
                    if let data = decoded.data, decoded.success {
                        self.selectedReservationStatusItem = data
                    } else {
                        if let message = decoded.message {
                            self.errorMessage = message
                        } else {
                            self.errorMessage = I18n.Common.commonError
                        }
                        
                        self.isShowPopup = true
                    }
                } catch {
                    self.errorMessage = I18n.Common.commonError
                    self.isShowPopup = true
                }
            }
            .store(in: &subscription)
    }
    
    func cancelReservation(reservationId: Int) {
        if cancelReasonSelectedIndex < 0 || (cancelReasonSelectedIndex == self.cancelReasons.count - 1 && self.reason.trimmingCharacters(in: .whitespaces).count <= 0) {
            self.errorMessage = I18n.MyPage.Reservation.Cancel.reasonRequired
            self.isShowPopup = true
            return
        }
        
        isLoading = true
        
        let reason = cancelReasonSelectedIndex == cancelReasons.count - 1 ? self.reason : cancelReasons[cancelReasonSelectedIndex]
        repository.cancelReservation(reservationId: reservationId, reason: reason)
            .sink { result in
                switch result {
                case .finished:
                    DEBUG_LOG("finish")
                case .failure(let error):
                    ERROR_LOG(error.localizedDescription)
                }
            } receiveValue: { [unowned self] response in
                self.isLoading = false
                let responseData = response.data
                
                do {
                    let jsonDecoder = JSONDecoder()
                    let decoded = try jsonDecoder.decode(ApiResponseWithoutData.self, from: responseData)
                    
                    if decoded.success {
                        self.isCancelComplete = true
                    } else {
                        if let message = decoded.message {
                            self.errorMessage = message
                        } else {
                            self.errorMessage = I18n.Common.commonError
                        }
                        
                        self.isShowPopup = true
                    }
                } catch {
                    self.errorMessage = I18n.Common.commonError
                    self.isShowPopup = true
                }
            }
            .store(in: &subscription)
    }
}