//
//  LoadDataMusic.swift
//  MusicPlayer
//
//  Created by Mr.Zhou on 2024/4/1.
//

import UIKit
///音乐数据集合控制器
class MPSideA_LoadDataMusic: NSObject {
    static let shared = MPSideA_LoadDataMusic()
    ///全部音乐资源
    var alllistMusics:[MPSideA_MusicViewModel] = []
    ///用户上传资源
    var userlistMusics:[MPSideA_MusicViewModel] = []
    ///本地全部资源
    var locallistMusics:[MPSideA_MusicViewModel] = []
    ///首页展示-第0层（本地三条加一条用户最后播放数据）
    var homeZeroMusics:[MPSideA_MusicViewModel] = []
    ///首页展示-第1层（本地数据，ablum为1）
    var homeFirstMusics:[MPSideA_MusicViewModel] = []
    ///首页展示-第2层（本地数据，ablum为2）
    var homeSecondMusics:[MPSideA_MusicViewModel] = []
    ///首页展示-第3层（本地数据，ablum为3）
    var homeThirdMusics:[[MPSideA_MusicViewModel]] = []
    private override init() {
        super.init()
        if (UserDefaults.standard.bool(forKey: "FirstBulid")) == false {
            //配置本地数据
            plistDatatoModel()
            UserDefaults.standard.set(true, forKey: "FirstBulid")
            print("Create data successfully")
        }
    }
    
    /// 数据配置
    /// - Parameter complete: 当模型组配置完成后执行该事件
    public func reloadListData(completion:(() -> Void)?) {
        //重新装填数据
        MPSideA_MusicModel.fetchAll { [weak self] results in
            guard let self = self else {return}
            //清空各项数组内容
            alllistMusics = []
            userlistMusics = []
            locallistMusics = []
            homeZeroMusics = []
            homeFirstMusics = []
            homeSecondMusics = []
            homeThirdMusics = []
            results.forEach { item in
                //筛选本地与用户上传数据
                if item.isLocal == true {
                    self.locallistMusics.append(.init(item))

                }else {
                    self.userlistMusics.append(.init(item))
                }
                //全部数据
                self.alllistMusics.append(.init(item))
            }
            //分类展示数据
            homeFirstMusics = locallistMusics.filter{($0.type == .First)}
            homeSecondMusics = locallistMusics.filter{($0.type == .Second)}
            homeThirdMusics = convertToTwoArray(locallistMusics.filter{($0.type == .Third)}, raw: 3)
            //取出固定内容
            if let last = homeThirdMusics.last?.last {
                homeZeroMusics.append(last)
            }
            if let last = homeSecondMusics.last {
                homeZeroMusics.append(last)
            }
            if let last = homeFirstMusics.last {
                homeZeroMusics.append(last)
            }
            if userlistMusics.count != 0, let last = userlistMusics.last {
                homeZeroMusics.append(last)
            }
            completion?()
        }
    }
    //获取本地资源Plist，并转化为音乐模型数组
    private func plistDatatoModel() {
        let plistPath = Bundle.main.path(forResource: "Resource", ofType: "plist")!
        let dictArray = NSArray(contentsOfFile: plistPath)
        dictArray?.forEach({ (item) in
            let dict = item as! [String : AnyObject]
            let music = try? MPSideA_MusicModel.create()
            music?.identifier = dict["identifier"] as? String
            music?.title = dict["title"] as? String
            music?.duration = dict["duration"] as! Double
            music?.cover = UIImage(named: dict["cover"] as! String)!.pngData()!
            music?.author = dict["author"] as? String
            music?.album = dict["album"] as! Int16
            music?.isLocal = dict["isLocal"] as! Bool
            music?.path = dict["path"] as! String
            music?.creationTime = Date().timeZone()
        })
        MPSideA_MusicModel.save()
    }
    
    /// 将一维音乐数组转为二维音乐数组
    /// - Parameters:
    ///   - array: 原音乐数组
    ///   - raw: 分割个数
    /// - Returns: 返回的二维数组
    private func convertToTwoArray(_ array:[MPSideA_MusicViewModel], raw:Int) -> [[MPSideA_MusicViewModel]] {
        let twoDArray = stride(from: 0, to: array.count, by: raw).map { (index) -> [MPSideA_MusicViewModel] in
            if (index + raw) > array.count {
                return Array(array[index...])
            } else {
                return Array(array[index..<index + raw])
            }
        }
        return twoDArray
    }
}