//
//  BaseCollectionViewController.swift
//  MTP2_iOS
//
//  Created by Muchinfo on 2021/1/11.
//  Copyright © 2021 Muchinfo. All rights reserved.
//

import UIKit
import JXSegmentedView
import IBAnimatable
import SwiftyAttributes

/// 列头宽度
var columnWidth: CGFloat = 100.0

/// 数据展示集合基类
class BaseCollectionViewController: BaseViewController {
    
    // MARK: - 属性列表
    /// 操作视图
    @IBOutlet weak var operationView: UIStackView! {
        didSet {
            operationView.isHidden = true
        }
    }
    /// 类目
    @IBOutlet weak var segmentedView: JXSegmentedView! {
        didSet {
            segmentedView.indicators = [indicator]
            segmentedView.delegate = self
        }
    }
    /// 主滚动视图
    @IBOutlet weak var scrollView: UIScrollView!
    /// 阴影视图
    @IBOutlet weak var shadowView: AnimatableView!
    /// 坐标题
    @IBOutlet weak var leftTitle: UILabel!
    /// 列头头部视图
    @IBOutlet weak var headerCollectionView: UICollectionView! {
        didSet {
            /// 设置委托代理
            headerDelegate = HeaderDelegate(self)
            headerCollectionView.dataSource = headerDelegate
            headerCollectionView.delegate = headerDelegate
            /// 设置约束
            headerCollectionView.setCollectionViewLayout(flowLayout, animated: true)
        }
    }
    /// 左侧数据列表
    @IBOutlet weak var leftTableView: UITableView! {
        didSet {
            leftDelegate = LeftDelegate(self)
            leftTableView.dataSource = leftDelegate
            leftTableView.delegate = leftDelegate
        }
    }
    /// 右侧数据列表
    @IBOutlet weak var rightTableView: UITableView! {
        didSet {
            rightDelegate = RightDelegate(self)
            rightTableView.dataSource = rightDelegate
            rightTableView.delegate = rightDelegate
        }
    }
    /// 宽度约束
    @IBOutlet weak var widthLayoutConstraint: NSLayoutConstraint! 
    
    /// 数据显示集合视图约束
    lazy var flowLayout: UICollectionViewFlowLayout = {
        /// 最小行间距，默认是0
        $0.minimumLineSpacing = 0
        /// 最小左右间距，默认是10
        $0.minimumInteritemSpacing = 0
        /// 区域内间距，默认是 UIEdgeInsetsMake(0, 0, 0, 0)
        $0.sectionInset = UIEdgeInsets(top: 0.0, left: 0, bottom: 0, right: 0)
        /// 水平滚动
        $0.scrollDirection = .horizontal
        return $0
    } (UICollectionViewFlowLayout())
    
    /// 列头数据
    var columnHeaders: [String] = [] {
        didSet {
            /// 刷新列表数据
            self.headerCollectionView.reloadData()
            /// 高度约束
            widthLayoutConstraint.constant = columnWidth*CGFloat(columnHeaders.count-1)
            /// 左侧标题
            leftTitle.text = columnHeaders.first
        }
    }
    /// 左侧数据信息
    var leftDatas: [String] = [] {
        didSet {
            /// 数据为空
            if leftDatas.count == 0, operationView == nil {
                operationView.isHidden = true
            }
            /// 刷新左侧列表数据
            leftTableView.reloadData()
        }
    }
    /// 右侧数据信息
    var rightDatas: [[String]] = []{
        didSet {
            /// 刷新左侧列表数据
            rightTableView.reloadData()
        }
    }
    /// banners
    var banners: [String] = []
    
    /// HeaderCellIdentifier
    let HeaderCellIdentifier = "Header_Cell"
    var headerDelegate: HeaderDelegate?
    /// LeftCellID
    let LeftCellID = "Left_Cell"
    var leftDelegate: LeftDelegate?
    /// RightCellID
    let RightCellID = "Right_Cell"
    var rightDelegate: RightDelegate?
    /// 执行回调
    var segmentBlock: ((_ index: Int, _ segment: JXSegmentedView) -> Void)?
    /// 操作回调
    var operatorBlock: ((_ type: OperatorType, _ takeInfo: Any?, _ row: Int?) -> Void)?
    /// 选中回调
    var selectBlock: ((_ row: Int?) -> Void)?
    /// 是否允许选中
    var canSelected: Bool = true
    /// 选中的位置
    var selectedRow: (row: Int, isExpland: Bool)? {
        didSet {            
            /// 数据为空会异常
            if leftDatas.count == 0 || rightDatas.count == 0 {
                return
            }
            
            if let index = selectedRow {
                /// 刷新某一行
                leftTableView.reloadRows(at: [IndexPath(row: index.row, section: 0)], with: .automatic)
                /// 刷新某一行
                rightTableView.reloadRows(at: [IndexPath(row: index.row, section: 0)], with: .automatic)
            } else {
                /// 不为空
                if operationView != nil {
                    /// 每次更新都隐藏
                    operationView.isHidden = true
                }
                /// 重置选中行
                if let cell = leftTableView.visibleCells.first(where: { (obj) -> Bool in
                    return (obj as? LeftCell)?.isExpland ?? false
                }) as? LeftCell {
                    cell.isExpland = false
                }
                if let cell = rightTableView.visibleCells.first(where: { (obj) -> Bool in
                    return (obj as? RightCell)?.isExpland ?? false
                }) as? RightCell {
                    cell.isExpland = false
                }
                /// 重新刷新数据
                leftTableView.reloadData()
                rightTableView.reloadData()
            }
        }
    }
    /// 正常高度
    let normalTableHeight: CGFloat = 55.0
    /// 展开时高度
    let explaneTableHeight: CGFloat = 95.0

    // MARK: - 生命周期
    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
        /// 不需要返回按钮
        addBackBarButtonItem(true)
    }
    
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        /// 允许横屏
        let app = UIApplication.shared.delegate as? AppDelegate
        app?.isRotation = true
        
        /// 侦听横竖屏切换
        NotificationCenter.default.addObserver(self, selector: #selector(orientationDidChange(interfaceOrientation:)), name: UIDevice.orientationDidChangeNotification, object: nil)
    }
    
    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        /// 清空数据
        selectedRow = nil
    }
    
    override func viewDidDisappear(_ animated: Bool) {
        super.viewDidDisappear(animated)
        
        /// 允许横屏
        let app = UIApplication.shared.delegate as? AppDelegate
        app?.isRotation = true
        
        /// 移出侦听
        NotificationCenter.default.removeObserver(self)
    }
    
    // MARK: - 交互相关
    /// onTapGestureRecognizer
    /// - Parameter sender: sender
    @IBAction fileprivate func onTapGestureRecognizer(_ sender: UITapGestureRecognizer) {
        let point = sender.location(in: rightTableView)
        /// 异常
        guard let index = rightTableView.indexPathForRow(at: point) else { return }
        /// 执行回调
        rightTableView.delegate?.tableView?(rightTableView, didSelectRowAt: index)
    }
    
    /// orientationDidChange
    /// - Parameter interfaceOrientation: interfaceOrientation
    @objc func orientationDidChange(interfaceOrientation: UIInterfaceOrientation) {
        if segmentedView != nil {
            /// 横竖屏切换时 重新计算
            segmentedView.width = self.view.width
            segmentedView.reloadData()
        }
    }
}

// MARK: - JXSegmentedViewDelegate
extension BaseCollectionViewController: JXSegmentedViewDelegate {
    func segmentedView(_ segmentedView: JXSegmentedView, didSelectedItemAt index: Int) {
        /// 清空数据
        selectedRow = nil
        /// 执行回调
        if let block = self.segmentBlock { block(index, segmentedView) }
    }
}

// MARK: - ColunmTitles、 UITableViewDelegate & UITableViewDataSource
class HeaderDelegate: NSCoder, UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {
    
    var owner: BaseCollectionViewController
    init(_ owner: BaseCollectionViewController) {
        self.owner = owner
    }
    
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return self.owner.columnHeaders.count-1
    }
    
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: self.owner.HeaderCellIdentifier, for: indexPath) as! HeaderCell
        cell.headerTitle.text = owner.columnHeaders[indexPath.row+1]
        return cell
    }
    
    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        return CGSize(width: columnWidth, height: 35.0)
    }
    
    func scrollViewDidScroll(_ scrollView: UIScrollView) {
        self.owner.scrollView.contentOffset.x = scrollView.contentOffset.x
    }
    
    func scrollViewWillBeginDragging(_ scrollView: UIScrollView) {}
    
    func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {}
}

// MARK: - 左边 UITableViewDelegate & UITableViewDataSource
class LeftDelegate: NSCoder, UITableViewDelegate, UITableViewDataSource {
    
    var owner: BaseCollectionViewController
    init(_ owner: BaseCollectionViewController) {
        self.owner = owner
    }
    
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return self.owner.leftDatas.count
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: owner.LeftCellID, for: indexPath) as! LeftCell
        /// 所在的行数
        cell.rowNum = indexPath.row
        /// 执行回调
        cell.operatorBlock = { (_ type: OperatorType, _ takeInfo: Any?, _ row: Int?) in
            if let block = self.owner.operatorBlock { block(type, takeInfo, row) }
        }
        cell.model = owner.leftDatas[indexPath.row]
        return cell
    }
    
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        /// 防止数据为空异常
        if owner.leftDatas.count == 0 || owner.rightDatas.count == 0 { return }
        /// 先清除选中状态
        owner.leftTableView.visibleCells.filter({($0 as? LeftCell)?.isExpland == true}).forEach { (obj) in
            (obj as? LeftCell)?.isExpland = false
        }
        owner.rightTableView.visibleCells.filter({($0 as? RightCell)?.isExpland == true}).forEach { (obj) in
            (obj as? RightCell)?.isExpland = false
        }
        
        if let selected = owner.selectedRow, indexPath.row == selected.row {
            owner.selectedRow = (row: indexPath.row, !(selected.isExpland))
        } else {
            owner.selectedRow = (row: indexPath.row, true)
        }
        /// 执行选中回调
        if let select = owner.selectBlock { select(indexPath.row) }
    }
    
    func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
        if let index = owner.selectedRow {
            return (index.row == indexPath.row && index.isExpland == true && owner.canSelected) ? owner.explaneTableHeight : owner.normalTableHeight
        }
        return owner.normalTableHeight
    }
    
    func scrollViewDidScroll(_ scrollView: UIScrollView) {
        owner.rightTableView.contentOffset.y = scrollView.contentOffset.y
        /// 执行回调
        if let bk = owner.selectBlock, let index = owner.selectedRow, index.isExpland {
            bk(index.row)
        }
    }
    
    func scrollViewWillBeginDragging(_ scrollView: UIScrollView) {}
    
    func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {}
}

// MARK: - 右边 UITableViewDelegate & UITableViewDataSource
class RightDelegate: NSCoder, UITableViewDelegate, UITableViewDataSource {
    
    var owner: BaseCollectionViewController
    init(_ owner: BaseCollectionViewController) {
        self.owner = owner
    }
    
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return owner.rightDatas.count
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: self.owner.RightCellID, for: indexPath) as! RightCell
        cell.rowNum = indexPath.row
        cell.model = owner.rightDatas[indexPath.row]
        cell.operatorBlock = { (_ type: OperatorType, _ takeInfo: Any?, _ row: Int?) in
            /// 执行回调
            if let block = self.owner.operatorBlock { block(type, takeInfo, row) }
        }
        return cell
    }
    
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        /// 防止数据为空异常
        if owner.leftDatas.count == 0 || owner.rightDatas.count == 0 { return }
        
        /// 先清除选中状态
        owner.leftTableView.visibleCells.filter({($0 as? LeftCell)?.isExpland == true}).forEach { (obj) in
            (obj as? LeftCell)?.isExpland = false
        }
        owner.rightTableView.visibleCells.filter({($0 as? RightCell)?.isExpland == true}).forEach { (obj) in
            (obj as? RightCell)?.isExpland = false
        }
        
        if let selected = owner.selectedRow, indexPath.row == selected.row {
            owner.selectedRow = (row: indexPath.row, !(selected.isExpland))
        } else {
            owner.selectedRow = (row: indexPath.row, true)
        }
        /// 执行选中回调
        if let select = owner.selectBlock { select(indexPath.row) }
    }
    
    func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
        if let index = owner.selectedRow {
            return (index.row == indexPath.row && index.isExpland == true && owner.canSelected) ? owner.explaneTableHeight : owner.normalTableHeight
        }
        return owner.normalTableHeight
    }
    
    func scrollViewDidScroll(_ scrollView: UIScrollView) {
        owner.leftTableView.contentOffset.y = scrollView.contentOffset.y
        /// 执行回调
        if let bk = owner.selectBlock, let index = owner.selectedRow, index.isExpland {
            bk(index.row)
        }
    }
    
    func scrollViewWillBeginDragging(_ scrollView: UIScrollView) {}
    func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {}
}


// MARK: - UIScrollViewDelegate
extension BaseCollectionViewController: UIScrollViewDelegate {
    /// scrollViewDidScroll
    /// - Parameter scrollView: scrollView
    func scrollViewDidScroll(_ scrollView: UIScrollView) {
        /// contentOffset.x
        headerCollectionView.contentOffset.x = scrollView.contentOffset.x
        /// 左侧
        if scrollView.contentOffset.x<=0 { headerCollectionView.contentOffset.x = 0.0 }
        /// 执行回调
        if let bk = selectBlock, let index = selectedRow, index.isExpland {
            bk(index.row)
        }
    }
    
    func scrollViewWillBeginDragging(_ scrollView: UIScrollView) {}
    func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {}
}

// MARK: - HeaderCell
class HeaderCell: UICollectionViewCell {
    @IBOutlet weak var headerTitle: UILabel!
}

// MARK: - RightCell
class RightCell: BaseTableViewCell<[String]> {
    /// 滚动视图
    @IBOutlet weak var stackView: UIStackView!
    /// 列头头部视图
    @IBOutlet weak var collectionView: UICollectionView! {
        didSet {
            /// 设置委托代理
            collectionView.dataSource = self
            collectionView.delegate = self
            /// 设置约束
            collectionView.setCollectionViewLayout(flowLayout, animated: true)
            /// 刷新数据
            collectionView.reloadData()
        }
    }
    /// 数据显示集合视图约束
    lazy var flowLayout: UICollectionViewFlowLayout = {
        /// 最小行间距，默认是0
        $0.minimumLineSpacing = 0
        /// 最小左右间距，默认是10
        $0.minimumInteritemSpacing = 0
        /// 区域内间距，默认是 UIEdgeInsetsMake(0, 0, 0, 0)
        $0.sectionInset = UIEdgeInsets(top: 0.0, left: 0, bottom: 0, right: 0)
        /// 水平滚动
        $0.scrollDirection = .horizontal
        return $0
    } (UICollectionViewFlowLayout())
    /// CellIdentifier
    fileprivate let CellIdentifier = "Collection_Cell"
    /// 操作回调
    var operatorBlock: ((_ type: OperatorType, _ takeInfo: Any?, _ row: Int?) -> Void)?
    /// 上层视图
    var father: BaseCollectionViewController?
    
    /// 数据模型
    override var model: [String]? {
        didSet {
            /// 异常
            guard let _ = model else { return }
            /// 刷新列表数据
            self.collectionView.reloadData()
        }
    }
}

// MARK: - UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout
extension RightCell: UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return self.model?.count ?? 0
    }
    
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: CellIdentifier, for: indexPath) as! RightContentCell
        let titles = (self.model?[indexPath.item] ?? "\n").components(separatedBy: "\n")
        cell.titleLabel.text = titles.first?.isBlank()
        if titles.count > 1 {
            cell.detailLabel.text = titles.last?.isBlank()
        }
        cell.detailLabel.isHidden = titles.count <= 1
        return cell
    }
    
    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        return CGSize(width: columnWidth, height: 55.0)
    }
    
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        /// 执行回调
        if let bk = operatorBlock { bk(.detail, nil, rowNum) }
    }
}

// MARK: - RightContentCell
class RightContentCell: UICollectionViewCell {
    /// titleLabel
    @IBOutlet weak var titleLabel: UILabel!
    /// detailLabel
    @IBOutlet weak var detailLabel: UILabel!
}

// MARK: - LeftCell
class LeftCell: BaseTableViewCell<Any> {
    /// 箭头
    @IBOutlet weak var arrow: AnimatableImageView!
    /// titleLabel
    @IBOutlet weak var titleLabel: UILabel!
    /// detailLabel
    @IBOutlet weak var detailLabel: UILabel!
    
    /// 是否拓展
    override var isExpland: Bool {
        didSet {
            arrow.image = UIImage(named: isExpland ? "arrow_up" : "arrow_down")
        }
    }
    
    /// 数据Model
    override var model: Any? {
        didSet {
            /// 异常
            guard let obj = model as? String else {
                return
            }
            /// 数据显示
            let titles = obj.components(separatedBy: "\n")
            titleLabel.text = titles.first?.isBlank()
            if titles.count > 1 { detailLabel.text = titles.last?.isBlank() }
            detailLabel.isHidden = titles.count <= 1
        }
    }
    /// 操作回调
    var operatorBlock: ((_ type: OperatorType, _ takeInfo: Any?, _ row: Int?) -> Void)?
}