//
//  GroupMemberListVM.swift
//  QuickLocation
//
//  Created by 八条 on 2026/6/29.
//

import RxSwift
import RxRelay
import RxDataSources
import ObjectMapper

struct DrivingEventItem: IdentifiableType, Equatable {
    typealias Identity = String
    let identity: String
    let title: String
    let iconName: String
    let count: Int

    init(title: String, iconName: String, count: Int = 0) {
        self.identity = title
        self.title = title
        self.iconName = iconName
        self.count = count
    }
}

typealias DrivingEventSection = SectionModel<String, DrivingEventItem>
typealias ScheduleRecordSection = SectionModel<String, ScheduleRecordModel>

class GroupMemberListVM {

    let groupKey: String
    var groupModel: GroupInfoModel?

    struct Output {
        var sectionedItems: Observable<[GroupMemberListSectionModel]>
        var drivingSectionedItems: Observable<[DrivingEventSection]>
        var scheduleSectionedItems: Observable<[ScheduleRecordSection]>
    }

    let output: Output

    var memberId: String = ""
    
    private let sectionedItems = PublishSubject<[GroupMemberListSectionModel]>()
    private let drivingItemsRelay = BehaviorRelay<[DrivingEventItem]>(value: GroupMemberListVM.defaultDrivingEvents)
    private let scheduleItemsRelay = BehaviorRelay<[ScheduleRecordModel]>(value: [])

    private var memberList: [GroupMemberModel] = []
    
    private static let defaultDrivingEvents: [DrivingEventItem] = [
        DrivingEventItem(title: "急加速", iconName: "GroupMemberList/1"),
        DrivingEventItem(title: "急转向", iconName: "GroupMemberList/3"),
        DrivingEventItem(title: "急刹", iconName: "GroupMemberList/5"),
        DrivingEventItem(title: "手机干扰", iconName: "GroupMemberList/7"),
        DrivingEventItem(title: "超速", iconName: "GroupMemberList/2"),
        DrivingEventItem(title: "低速", iconName: "GroupMemberList/4"),
        DrivingEventItem(title: "频繁变道", iconName: "GroupMemberList/6"),
        DrivingEventItem(title: "长时间驾驶", iconName: "GroupMemberList/8")
    ]

    // 是否当前用户
    func isCurrentUser(id: String) -> Bool {
        id == AppContextManager.shared.userId
    }

    // 是否圈主
    func isGroupOwn(id: String) -> Bool {
        guard let model = groupModel else { return false }
        return model.group_key.contains(id)
    }

    func loadData(_ list: [GroupMemberModel]) {
        var tempmemberList = list
        tempmemberList.moveToFirst { $0.is_online == true }
        tempmemberList.moveToFirst { $0.user_id == AppContextManager.shared.userId }
        tempmemberList.moveToFirst { isGroupOwn(id: $0.user_id) }
        memberList = tempmemberList
        memberId = memberList.first?.user_id ?? ""
        sectionedItems.onNext(memberList.mapSection())
    }

    /// 获取成员在列表中的行号
    func rowOf(userId: String) -> Int? {
        memberList.firstIndex(where: { $0.user_id == userId })
    }

    /// 加载行程记录
    func loadScheduleRecords(_ list: [ScheduleRecordModel]) {
        scheduleItemsRelay.accept(list)
    }

    /// 更新驾驶事件统计
    func updateDrivingStats(_ stats: DrivingStatsModel) {
        let items = Self.defaultDrivingEvents.enumerated().map { i, item in
            let count: Int
            switch i {
            case 0: count = stats.hard_acceleration
            case 1: count = stats.sharp_turn
            case 2: count = stats.hard_braking
            case 3: count = stats.signal_loss
            case 4: count = stats.speeding
            case 5: count = stats.low_speeding
            case 6: count = stats.frequent_lane_change
            case 7: count = stats.long_driving
            default: count = 0
            }
            return DrivingEventItem(title: item.title, iconName: item.iconName, count: count)
        }
        drivingItemsRelay.accept(items)
    }

    init(groupKey: String) {
        self.groupKey = groupKey
        output = Output(
            sectionedItems: sectionedItems.asObservable(),
            drivingSectionedItems: drivingItemsRelay.map { $0.mapSection() }.asObservable(),
            scheduleSectionedItems: scheduleItemsRelay.map { $0.mapSection() }.asObservable()
        )
    }
}