//
//  AKExcelDateManager.swift
//  YunYingSwift
//
//  Created by AlasKu on 17/2/10.
//  Copyright © 2017年 innostic. All rights reserved.
//

import UIKit

class AKExcelDataManager: NSObject {
    
    //MARK: - Properties
    
    /// excelView
    var excelView : AKExcelView?
    /// AllExcel Data
    var dataArray : [[String]]?
    /// freezeCollection Width
    var freezeWidth : CGFloat = 0
    /// freezeColectionView cells Size
    var freezeItemSize = [String]()
    /// slideCollectionView Cells Size
    var slideItemSize = [String]()
    /// slideCollectionView Cells Size
    var slideWidth : CGFloat = 0
    /// headFreezeCollectionView Data
    var headFreezeData = [String]()
    /// headSlideCollectionView Data
    var headSlideData = [String]()
    /// contentFreezeCollectionView Data
    var contentFreezeData = [[String]]()
    /// contentSlideCollectionView Data
    var contentSlideData = [[String]]()
    /// 支持颜色
    var contentSlideDataTextColor = [[UIColor]]()
    /// slideItemOffSetX
    var slideItemOffSetX = [CGFloat]()
    
    private func resetData() {
        dataArray?.removeAll()
        freezeWidth = 0
        freezeItemSize.removeAll()
        slideItemSize.removeAll()
        slideWidth = 0
        headFreezeData.removeAll()
        headSlideData.removeAll()
        contentFreezeData.removeAll()
        contentSlideData.removeAll()
        contentSlideDataTextColor.removeAll()
        slideItemOffSetX.removeAll()
    }
    
    //MARK: - Private Method
    private func loadData() {
        
        var arrM = [[String]]()
        
        if let headerTitles = excelView?.headerTitles {
            arrM.append(headerTitles)
        }
        
        if let contentData = excelView?.contentData {
            for model in contentData {
                arrM.append(model.valuesFor(excelView?.properties))
            }
        }
        dataArray = arrM
    }
    
    private func configData() {
        guard let excelView = excelView,
            let dataArray = dataArray,
            dataArray.count > (excelView.headerTitles == nil ? 0 : 1) else { return }
        
        if let _ = excelView.headerTitles {
            headFreezeData = dataArray[0].prefix(upTo: excelView.leftFreezeColumn).compactMap({ $0 })
            headSlideData = dataArray[0].suffix(from: excelView.leftFreezeColumn).compactMap({ $0 })
            contentFreezeData = dataArray[1..<dataArray.count].compactMap({ $0.prefix(upTo: excelView.leftFreezeColumn).compactMap({ $0 }) })
            contentSlideData = dataArray[1..<dataArray.count].compactMap({ $0.suffix(from: excelView.leftFreezeColumn).compactMap({ $0 }) })
        } else {
            contentFreezeData = dataArray.prefix(upTo: excelView.leftFreezeColumn).compactMap({ $0 })
            contentSlideData = dataArray.suffix(from: excelView.leftFreezeColumn).compactMap({ $0 })
        }
    }
    
    private func caculateWidths() {
        guard let excelView = excelView,
            let dataArray = dataArray,
            dataArray.count > (excelView.headerTitles == nil ? 0 : 1) else { return }
        
        var fItemSize = [String]()
        var sItemSize = [String]()
        
        let col = dataArray.first!.count // 标题那一行或者数据第一行
        
        for i in 0 ..< col {
            
            var colW = CGFloat()
            for j in 0 ..< dataArray.count {
                
                let value = dataArray[j][i]
                
                var size = value.getTextSize(font: excelView.contentTextFontSize, size: CGSize(width: excelView.itemMaxWidth, height: excelView.itemHeight))
                if j == 0 && excelView.headerTitles != nil {
                    size = value.getTextSize(font: excelView.headerTextFontSize, size: CGSize(width: excelView.itemMaxWidth, height: excelView.itemHeight))
                }
                
                if let columnWidthSetting = excelView.columnWidthSetting,
                    let setWidth = columnWidthSetting[i] {
                    
                    size = CGSize(width: setWidth, height: excelView.itemHeight)
                }
                
                let targetWidth = size.width + 2 * excelView.textMargin
                
                // 若这个字符串宽度大于上一个单元格的宽度,目的是为了统一每一列的宽度
                if targetWidth >= colW {
                    colW = targetWidth
                }
                
                colW = max(excelView.itemMinWidth, min(excelView.itemMaxWidth, colW))
            }
            // 滑动scroll节点
            slideItemOffSetX.append(slideWidth)
            
            if i < excelView.leftFreezeColumn {
                fItemSize.append(NSCoder.string(for: CGSize(width: colW, height: excelView.itemHeight - 1)))
                freezeWidth += colW + 1 // 这里加1的原因是为了解决浮点数计算误差
                dPrint("fItemSize is \(NSCoder.string(for: CGSize(width: colW, height: excelView.itemHeight - 1)))")
                dPrint("fItemSize is \(freezeWidth)")
            } else {
                sItemSize.append(NSCoder.string(for: CGSize(width: colW, height: excelView.itemHeight - 1)))
                slideWidth += colW + 1 // 这里加1的原因是为了解决浮点数计算误差
                dPrint("sItemSize is \(NSCoder.string(for: CGSize(width: colW, height: excelView.itemHeight - 1)))")
                dPrint("slideWidth is \(slideWidth)")
            }
        }
        freezeItemSize = fItemSize
        slideItemSize = sItemSize
    }
    
    //MARK: - Public Method
    
    func caculateData() {
        resetData()
        loadData()
        configData()
        caculateWidths()
    }
}

//MARK: - String Extension
extension String {
    
    func getTextSize(font:UIFont,size:CGSize) -> CGSize {
        
        let dic = NSDictionary(object: font, forKey: NSAttributedString.Key.font as NSCopying)
        
        let stringSize = self.boundingRect(with: size, options: .usesLineFragmentOrigin, attributes: dic as? [NSAttributedString.Key : Any] , context:nil).size
        
        return stringSize
    }
}


extension NSObject
{
    func propertyNames() -> [String] {
        
        return Mirror(reflecting: self).children.compactMap { $0.label }
    }
    
    func valueFor(_ property:String) -> String? {
        
        var value : String?
        for case let (label?, anyValue) in Mirror(reflecting:self).children {
            if label.isEqual(property) {
                value = anyValue as? String
            }
        }
        return value
    }
    
    func valuesFor(_ properties:[String]?) -> [String] {
        
        if let pros = properties {
            var arrM = [String]()
            for pro in pros {
                arrM.append(valueFor(pro)!)
            }
            return arrM
        }
        
        var values = [String]()
        for case let (_?, anyValue) in Mirror(reflecting:self).children {
            
            values.append(anyValue as? String ?? "")
        }
        return values
    }
}