//
//  RemoveMemberViewModel.swift
//  QuickLocation
//
//  Created by 八条 on 2026/6/12.
//

import RxSwift
import RxCocoa
import RxDataSources
import ObjectMapper

typealias RemoveMemberListSectionModel = SectionModel<String, GroupMemberModel>

class RemoveMemberViewModel {
    
    let groupId: String
    
    var groupModel: GroupInfoModel?
    
    struct Output {
        var sectionedItems: Observable<[ReviewMemberListSectionModel]>
    }
    
    let output: Output
    
    private var disposeBag = DisposeBag()
    private let sectionedItems = PublishSubject<[ReviewMemberListSectionModel]>()
    private var list: [GroupMemberModel] = []
    
    var selectedMembers = BehaviorRelay<[String]>(value: [])
    
    lazy var cellAction: Action<GroupMemberModel, Void> = { this in
        return Action { model in
            let memberId = model.user_id
            guard !self.groupId.contains(memberId) else { return .empty() }

            var current = this.selectedMembers.value
            if let idx = current.firstIndex(of: memberId) {
                current.remove(at: idx)
            } else {
                current.append(memberId)
            }
            this.selectedMembers.accept(current)
            self.sectionedItems.onNext(self.list.mapSection())
            return .empty()
        }
    }(self)
    
    func isSelected(id: String) -> Bool {
        (self.selectedMembers.value.first(where: { $0 == id }) != nil)
    }
    
    func loadData(_ list: [GroupMemberModel]) {
        self.list = list
        sectionedItems.onNext(list.mapSection())
    }
    
    init(groupId: String) {
        self.groupId = groupId
        output = Output(
            sectionedItems: sectionedItems.asObservable()
        )
    }
}