//
//  ScheduleDetailVM.swift
//  QuickLocation
//
//  Created by 八条 on 2026/6/25.
//

import RxSwift
import RxCocoa
import RxDataSources

enum SchedulePointDetailItem {
    case point(model: SchedulePointModel)
    case event(model: SchedulePointEventModel)
}

typealias SchedulePointDetailSectionModel = SectionModel<String, SchedulePointDetailItem>

struct ScheduleDetailViewModel {
    
    struct Output {
        var sectionedItems: Observable<[ViewedListSectionModel]>
        var pointSectionedItems: Observable<[SchedulePointDetailSectionModel]>
    }
    
    let output: Output
    
    private let sectionedItems = PublishSubject<[ViewedListSectionModel]>()
    private let pointSectionedItems = PublishSubject<[SchedulePointDetailSectionModel]>()
    
    let routeId: String
    let scheduModel: ScheduleModel?
    
    func loadViewedData(_ list: [ViewedModel]) {
        sectionedItems.onNext(list.mapSection())
    }
    
    func loadPointData() {
        guard let model = scheduModel else { return }
        
        var sectionModels: [SchedulePointDetailSectionModel] = []
        var items: [SchedulePointDetailItem] = []
        
        for point in model.points {
            items.append(.point(model: point))
            for event in point.events {
                items.append(.event(model: event))
            }
            sectionModels.append(SchedulePointDetailSectionModel(model: point.id, items: items))
            items = []
        }
        
        pointSectionedItems.onNext(sectionModels)
    }
    
    // MARK: - init
    init(routeId: String, model: ScheduleModel?) {
        self.routeId = routeId
        self.scheduModel = model
        output = Output(
            sectionedItems: sectionedItems.asObservable(),
            pointSectionedItems: pointSectionedItems.asObservable()
        )
    }
}