//
//  MPPositive_LoadSearchResultsViewModel.swift
//  MusicPlayer
//
//  Created by Mr.Zhou on 2024/5/13.
//

import UIKit
///搜索结果数据管理模型
class MPPositive_SearchResultsLoadViewModel: NSObject {
    ///模块组
    var sectionLists:[MPPositive_SearchResultListViewModel]!{
        didSet{
            DispatchQueue.main.async {
                [weak self] in
                guard let self = self else {return}
                //得到了搜索结果
                if let block = resultReloadBlock {
                    block()
                }
            }
        }
    }
    var resultReloadBlock:(() -> Void)?
    //用户输入的搜索文本
    init(_ text:String){
        super.init()
        getSearchResults(text)
    }
    //根据用户输入文本内容请求搜索接口
    private func getSearchResults(_ text:String) {
        MP_HUD.loading()

        //判断是否重复搜索历史
        MPPositive_SearchTagModel.fetch(predicate: .init(format: "text==%@", text)) { results in
            if results.count == 0 {
                //不是重复搜索
                //同时新增一个搜索历史
                let tag = try? MPPositive_SearchTagModel.create()
                tag?.date = Date()
                tag?.text = text
                MPPositive_SearchTagModel.save()
            }else if let first = results.first {
                //是同一个，更改日期
                first.date = Date()
                MPPositive_SearchTagModel.save()
            }
            
        }
        MP_NetWorkManager.shared.requestSearchPreviewResults(text) { [weak self] results in
            guard let self = self else {return}
            MP_HUD.hideNow()
            sectionLists = results
        }
    }
}