platform-ios/RainbowPlanet/RainbowPlanet/Modules/PublishModule/PublishAddTopic/Controller/PublishAddTopicController.swift

//
//  PublishAddTopicController.swift
//  RainbowPlanet
//
//  Created by Christopher on 2019/6/17.
//  Copyright © 2019 RainbowPlanet. All rights reserved.
//

import UIKit
import RxSwift
import SwiftyJSON
import Photos

class PublishAddTopicController: BaseViewController {
    
    // 话题组のModelArr
    var communityTopicModels = Array<CommunityTopicModel>()
    
    // 话题组下子话题のModelArr
    var topicListModels = Array<CommunityTopicDataModel>()
   
    // 选中的话题
    var selTopicModelArr: Array<CommunityTopicDataModel>?
    
    typealias SelTopicsClosure = (_ topicMdlArr: Array<CommunityTopicDataModel>) -> Void
    var selTopicsClosure : SelTopicsClosure?
    
    
    override func viewDidLoad() {
        super.viewDidLoad()
        setupViews()
        setupData()
    }
    
    override func setupViews() {
        self.view.backgroundColor = kffffffColor
        
        navigationBar.title = "添加话题"
        updateFinishButtonStatus()
        navigationBar.onClickRightButton = {
            [weak self] in
            if let selTopicsClosure = self?.selTopicsClosure {
                selTopicsClosure(self!.selTopicModelArr!)
            }
            self?.navigationController?.popViewController(animated: true)
        }
        
        view.addSubview(tableView)
        tableView.snp.makeConstraints { (make) in
            make.top.equalToSuperview().offset(kNavBarTotalHeight)
            make.left.right.bottom.equalToSuperview()
        }
    }
    
    override func setupData() {
        // 话题组
        communityTopicCategoryApi(page:1)
        // 子话题
        communityTopicsApi(isSuggest: 1, categoryId: 0, page: 1)
    }
    
    lazy var tableView: UITableView = {
        let tableView = UITableView(frame: CGRect.zero, style: UITableView.Style.grouped)
        tableView.separatorStyle = .none
        tableView.backgroundColor = kffffffColor
        tableView.dataSource = self
        tableView.delegate = self
        tableView.estimatedRowHeight = 0.000001
        tableView.estimatedSectionFooterHeight = 0.000001
        tableView.estimatedSectionHeaderHeight = 0.000001
        return tableView
    }()
    
}

// MARK: - tableView dataSource && delegate
extension PublishAddTopicController : UITableViewDelegate, UITableViewDataSource {
    
    func numberOfSections(in tableView: UITableView) -> Int {
        return 2
    }
    
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        switch section {
        case 0:
            return 1
        case 1:
            return topicListModels.count
        default:
            return 1
        }
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        switch indexPath.section {
        case 0:
            let picCell = PublishTopicTypeCell.cellWith(tableView: tableView, indexPath: indexPath)
            picCell.topicModels = communityTopicModels
            picCell.chooseTopicBlock = {
                [weak self] (topicId, indexRow) in
                if indexRow == 0 {
                    // 推荐
                    self?.communityTopicsApi(isSuggest: 1, categoryId: topicId, page: 1)
                } else {
                    // 其他
                    self?.communityTopicsApi(isSuggest: 0, categoryId: topicId, page: 1)
                }
            }
            return picCell
        case 1:
            let titleCell = PublishTopicItemCell.cellWith(tableView: tableView, indexPath: indexPath)
            titleCell.subTopicModel = topicListModels[indexPath.row]
            titleCell.isChoosed = topicListModels[indexPath.row].isSelected
            return titleCell
        default:
            return UITableViewCell()
        }
    }
    
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        let selTopicMdl: CommunityTopicDataModel = topicListModels[indexPath.row]
        
        if selTopicModelArr!.count >= 5 && selTopicMdl.isSelected == false {
            SwiftProgressHUD.shared().showText("最多只能选择5个话题")
            return
        }
        
        if selTopicMdl.isSelected {
            // 点击的已被选中，移除
            selTopicMdl.isSelected = false
            for (index, topicMdl) in selTopicModelArr!.enumerated() {
                if selTopicMdl.id == topicMdl.id {
                    selTopicModelArr!.remove(at: index)
                    break
                }
            }
        } else {
            // 未被选中过，添加选中
            selTopicMdl.isSelected = true
            selTopicModelArr!.append(selTopicMdl)
        }
        tableView.reloadData()
        
        updateFinishButtonStatus()
    }
    
    func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
        switch indexPath.section {
        case 0:
            return 90
        case 1:
            return 50
        default:
            return 50
        }
    }
    
    func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
        if section == 0 {
            return 44
        } else {
            return 0
        }
    }
    
    func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
        if section == 0 {
            let headerView = PublishTopicHeaderView(frame: CGRect.zero)
            headerView.selTopicModels = selTopicModelArr
            headerView.deleteTransClosure = {
                [weak self] (index) in
                // 移除选中 -> 校正列表选中状态 -> 刷新table -> 刷新完成btn
                self?.selTopicModelArr!.remove(at: index)
                self?.fixTopicSelectedStatus()
                self?.tableView.reloadData()
                self?.updateFinishButtonStatus()
            }
            headerView.layoutIfNeeded()
            headerView.reloadData()
            return headerView
        } else {
            return nil
        }
        
    }
    
    func tableView(_ tableView: UITableView, heightForFooterInSection section: Int) -> CGFloat {
        return 0.000001
    }
    
    func tableView(_ tableView: UITableView, viewForFooterInSection section: Int) -> UIView? {
        return nil
    }
    
}

// MARK: -
extension PublishAddTopicController {
    
    /// 话题组
    ///
    /// - Parameters:
    ///   - isSuggest: 是否推荐
    ///   - page: 分页
    func communityTopicCategoryApi(page:Int) {
        SwiftMoyaNetWorkServiceCommunity.shared().communityTopicCategoryApi(isSuggest: 0, page: page) {   [weak self] (communityTopicCategoryModel) -> (Void) in
            let topicCategoryModel = communityTopicCategoryModel as? CommunityTopicCategoryModel
            if topicCategoryModel?.pagination?.currentPage ?? 1  <= topicCategoryModel?.pagination?.totalPages ?? 1 {
                if topicCategoryModel?.pagination?.currentPage == 1{
                    self?.communityTopicModels.removeAll()
                }
                self?.communityTopicModels = (self?.communityTopicModels)! + (topicCategoryModel?.data!)!
                self?.tableView.reloadData()
                if  self?.communityTopicModels.count ?? 0 >= topicCategoryModel?.pagination?.total ?? 0 {
//                    self?.collectionView.isHiddenFooter(true)
                }
            }else {
//                self?.collectionView.endFooterNoMoreData()
            }
        }
    }
    
    /// 话题列表
    ///
    /// - Parameter page: 分页
    func communityTopicsApi(isSuggest:Int, categoryId:Int, page:Int) {
        SwiftMoyaNetWorkServiceCommunity.shared().communityTopicsApi(categoryId: categoryId, isSuggest: isSuggest, name: "", page: page) {
            [weak self] (communityTopicsModel) -> (Void) in
            let communityTopicsModel = communityTopicsModel as? CommunityTopicsModel
            if communityTopicsModel?.pagination?.currentPage ?? 1  <= communityTopicsModel?.pagination?.totalPages ?? 1 {
                if communityTopicsModel?.pagination?.currentPage == 1{
                    self?.topicListModels.removeAll()
                }
                self?.topicListModels = (self?.topicListModels)! + (communityTopicsModel?.data!)!
                // 更新选中状态
                self?.fixTopicSelectedStatus()
                self?.tableView.reloadData()
                if  self?.topicListModels.count ?? 0 >= communityTopicsModel?.pagination?.total ?? 0 {
                    self?.tableView.isHiddenFooter(true)
                }
            }else {
                self?.tableView.endFooterNoMoreData()
            }
        }
    }
    
    // 校正选中状态
    func fixTopicSelectedStatus() {
        for topicMdl in topicListModels {
            topicMdl.isSelected = false
            for selTopicMdl in selTopicModelArr! {
                if topicMdl.id == selTopicMdl.id {
                    topicMdl.isSelected = true
                    break
                }
            }
        }
    }
    
    func updateFinishButtonStatus() {
        let selCount = selTopicModelArr!.count
        if selCount == 0 {
            navigationBar.wr_setRightButton(title: "完成(\(selCount)/5)", titleColor: k999999Color)
            navigationBar.rightButton.isUserInteractionEnabled = false
        } else {
            navigationBar.wr_setRightButton(title: "完成(\(selCount)/5)", titleColor: k7AD489Color)
            navigationBar.rightButton.isUserInteractionEnabled = true
        }
    }
    
}