//
//  GroupDetailViewController.swift
//  Paiai_iOS
//
//  Created by FFIB on 16/4/5.
//  Copyright © 2016年 FFIB. All rights reserved.
//

import UIKit
import RxSwift
import RxCocoa
import PaiaiUIKit
import PaiaiDataKit

final class GroupDetailViewController: UIViewController {

    @IBOutlet weak var groupNameLabel: UILabel!
    // MARK: Storyboard property
    @IBOutlet weak var groupMemberCountLabel: UILabel!
    @IBOutlet weak var groupMemeberView: GroupDetailMemeberView!
    @IBOutlet weak var groupLockSwitch: UISwitch!
    @IBOutlet weak var groupLockTip: UILabel!

    var viewModel: GroupDetailViewModel!
    let disposeBag = DisposeBag()

    override func viewDidLoad() {
        super.viewDidLoad()
        binding()
        viewModel.reload()
        navigationItem.title = "群资料"
        setRightBarButtonItems()
    }

    func setRightBarButtonItems() {
        let item = UIBarButtonItem(image: UIImage(named: "navigation-right"), target: self, action: #selector(quit))
        navigationItem.setRightItem(item)
    }

    @objc func quit() {
        let alert = AlertController(title: "退出群", message: "退出后将不再能看到群内照片")
        alert.addAlertAction(AlertAction(title: "取消", style: .cancel))
        alert.addAlertAction(AlertAction(title: "确定", handler: { _ in
            self.viewModel.quit()
        }))
        presentController(alert)
    }
}

/// binding UI
fileprivate extension GroupDetailViewController {
    func binding() {
        bindViewModelToGroupName()
        bindViewModelToGroupMemberCount()
        bindViewModelToGroupMemeber()
        bindViewModelToGroupLock()
        bindViewModelToGroupLockSwitch()
        bindGroupLockSwitchToGroupLockTip()
    }

    func bindViewModelToGroupName() {
        viewModel.group_name.bind(to: groupNameLabel.rx.text).disposed(by: disposeBag)
    }

    func bindViewModelToGroupMemberCount() {
        viewModel.groupMemberCount.bind(to: groupMemberCountLabel.rx.text).disposed(by: disposeBag)
    }

    func bindViewModelToGroupMemeber() {
        viewModel.groupMembers.subscribe(onNext: { self.setupGroupMember(groupMemebers: $0) }).disposed(by: disposeBag)
    }

    func bindViewModelToGroupLock() {
        viewModel.group_lock.bind(to: groupLockSwitch.rx.value).disposed(by: disposeBag)
    }

    func bindViewModelToGroupLockSwitch() {
        viewModel.isAdmin.map { !$0 }.bind(to: groupLockSwitch.rx.isHidden).disposed(by: disposeBag)
    }

    func bindGroupLockSwitchToGroupLockTip() {
        groupLockSwitch.rx.value.subscribe(onNext: {[weak self] (val) in
            guard let `self` = self else { return }
            self.groupLockTip.text = val ? "群已锁定,不再允许新成员加入" : "群未锁定,可以邀请新成员加入"
        }).disposed(by: disposeBag)
    }

    private func setupGroupMember(groupMemebers: [GroupMemberItem]) {
        groupMemeberView.avatars = groupMemebers.compactMap { $0.avatar }
    }
}

/// storyboard action
extension GroupDetailViewController {
    @IBAction func navigateToGroupMember(_ sender: UITapGestureRecognizer) {
        viewModel.navigateToGroupMember()
    }

    @IBAction func navigateToGroupNameModification(_ sender: UITapGestureRecognizer) {
        viewModel.navigateToGroupNameModification()
    }

    @IBAction func presentGroupQR(_ sender: UITapGestureRecognizer) {
        let groupItem = viewModel.item.value.group
        let qrView = GroupQRView(group_name: groupItem.group_name,
                                 group_avatar: "Group\(groupItem.group_default_avatar)",
                                 groupQR: "https:pai.ai/g/\(groupItem.group_id)")
        let alert = AlertViewController(style: .custom(qrView, AlertAnimator()))
        presentController(alert)
    }

    @IBAction func changeSwitch() {
        viewModel.toggle(isLock: groupLockSwitch.isOn)
    }
}

extension GroupDetailViewController: NavigationBackViewController {}

extension GroupDetailViewController: Storyboarded {
    static func instantiate() -> GroupDetailViewController {
        return UIStoryboard.groupDetail.instantiateViewController(type: GroupDetailViewController.self)
    }
}