//
//  MineViewController.swift
//  QuickLocation
//
//  Created based on Lanhu design: 我的
//

import UIKit
import RxSwift
import RxCocoa
import RxDataSources
import ObjectMapper

final class MineViewController: BaseViewController {

    override var isNavigationBarHidden: Bool { true }
    override var preferredStatusBarStyle: UIStatusBarStyle { .default }

    fileprivate var rootView: MineView!

    private var tableView: UITableView {
        rootView.settingsTableView
    }

    private let viewModel = MineViewModel()
    private var groupKey: String = ""
    private var groupModel: GroupModel?
    private var photoWallMembers: [GroupMemberModel] = []

    override func loadView() {
        rootView = MineView(frame: UIScreen.main.bounds)
        view = rootView
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        bindViewModel()
        reactiveAction()
        viewModel.loadMenuData()
    }

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        requestUserInfo()
        requestGroupMembers()
    }

    private func bindViewModel() {
        viewModel.output.sectionedItems
            .bind(to: tableView.rx.items(dataSource: dataSource))
            .disposed(by: disposeBag)

        tableView.rx.modelSelected(MineMenuItem.self)
            .subscribe(viewModel.cellAction.inputs)
            .disposed(by: disposeBag)
    }

    private func reactiveAction() {
        rootView.vipActivateButton.rx.tap
            .subscribe(onNext: { _ in
                AppRouter.push(Route.vipRecharge)
            })
            .disposed(by: disposeBag)

        rootView.photoWall.onTapMember = { [weak self] member in
            self?.openMemberInfo(selectedUserId: member.user_id)
        }

        rootView.onQuickTap = { [weak self] title in
            self?.viewModel.handleMenu(MineMenuItem(icon: "", title: title))
        }
    }

    private lazy var dataSource: RxTableViewSectionedReloadDataSource<MineListSectionModel> = {
        RxTableViewSectionedReloadDataSource<MineListSectionModel>(
            configureCell: { (dataSource, tableView, indexPath, model) in
                let cell: MineMenuCell = tableView.dequeueReusableCell(for: indexPath)
                cell.configure(model)
                let isLast = indexPath.row == dataSource[indexPath.section].items.count - 1
                cell.showDivider = !isLast
                return cell
            })
    }()

    private func requestUserInfo() {
        UserService.userInfo().subscribe { response in
            guard let model = response.model else { return }
            if AppContextManager.shared.saveAccount(model) {
                self.rootView.setupData(model)
            }
        }.disposed(by: disposeBag)
    }

    private func requestGroupMembers() {
        let cached = AppContextManager.shared.defaultGroupKey
        if !cached.isEmpty {
            groupKey = cached
            loadPhotoWallMembers(groupKey: cached)
        }
        GroupService.groupInfo().subscribe(onNext: { [weak self] response in
            guard let self = self, let model = response.model else { return }
            self.groupModel = model
            let key = model.default_group_key
            guard !key.isEmpty else {
                if self.groupKey.isEmpty {
                    self.reloadPhotoWall(members: [], groupKey: "")
                }
                return
            }
            if self.groupKey != key {
                self.groupKey = key
                self.loadPhotoWallMembers(groupKey: key)
            }
        }).disposed(by: disposeBag)
    }

    private func loadPhotoWallMembers(groupKey: String) {
        GroupService.groupUsers(groupKey: groupKey)
            .subscribe(onNext: { [weak self] response in
                guard response.isValid(for: groupKey) else {
                    DLToast.showError(text: response.message ?? "获取圈子成员失败")
                    return
                }
                self?.reloadPhotoWall(
                    members: response.list,
                    groupKey: groupKey,
                    groupInfo: response.model
                )
            }, onError: { error in
                DLToast.showError(text: error.localizedDescription)
            })
            .disposed(by: disposeBag)
    }

    private func reloadPhotoWall(
        members: [GroupMemberModel],
        groupKey: String,
        groupInfo: GroupInfoModel? = nil
    ) {
        let sorted = viewModel.sortedMembers(members, groupKey: groupKey)
        photoWallMembers = sorted
        let ownerId = sorted.first {
            GroupOwnerMatcher.matches(userId: $0.user_id, groupKey: groupKey)
        }?.user_id ?? ""
        let currentGroup = groupInfo ?? groupModel?.groups.first {
            $0.group_key == groupKey
        }
        rootView.photoWall.reload(
            members: sorted,
            ownerUserId: ownerId,
            preferUserId: AppContextManager.shared.userId,
            isCoupleGroup: currentGroup?.isCoupleGroup == true
        )
    }

    private func openMemberInfo(selectedUserId: String) {
        let members = photoWallMembers.map { $0.toJSON() }
        guard !members.isEmpty else { return }
        var userInfo: [String: Any] = [
            "members": members,
            "userId": selectedUserId,
            "groupKey": groupKey
        ]
        if let group = groupModel {
            userInfo["groupJson"] = group.toJSON()
        }
        AppRouter.push(Route.memberInfo, userInfo: userInfo)
    }
}