//
//  settings.swift
//  Memory
//
//  Created by Serhiy Mytrovtsiy on 11/07/2020.
//  Using Swift 5.0.
//  Running on macOS 10.15.
//
//  Copyright © 2020 Serhiy Mytrovtsiy. All rights reserved.
//

import Cocoa
import StatsKit
import ModuleKit

internal class Settings: NSView, Settings_v {
    private var updateIntervalValue: Int = 1
    private var numberOfProcesses: Int = 8
    
    private let title: String
    
    public var callback: (() -> Void) = {}
    public var callbackWhenUpdateNumberOfProcesses: (() -> Void) = {}
    public var setInterval: ((_ value: Int) -> Void) = {_ in }
    
    public init(_ title: String) {
        self.title = title
        self.updateIntervalValue = Store.shared.int(key: "\(self.title)_updateInterval", defaultValue: self.updateIntervalValue)
        self.numberOfProcesses = Store.shared.int(key: "\(self.title)_processes", defaultValue: self.numberOfProcesses)
        
        super.init(frame: CGRect(
            x: 0,
            y: 0,
            width: Constants.Settings.width - (Constants.Settings.margin*2),
            height: 0
        ))
        
        self.wantsLayer = true
        self.canDrawConcurrently = true
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    public func load(widgets: [widget_t]) {
        self.subviews.forEach{ $0.removeFromSuperview() }
        
        let rowHeight: CGFloat = 30
        let num: CGFloat = 1
        
        self.addSubview(SelectTitleRow(
            frame: NSRect(x: Constants.Settings.margin, y: Constants.Settings.margin + (rowHeight + Constants.Settings.margin) * num, width: self.frame.width - (Constants.Settings.margin*2), height: rowHeight),
            title: LocalizedString("Update interval"),
            action: #selector(changeUpdateInterval),
            items: ReaderUpdateIntervals.map{ "\($0) sec" },
            selected: "\(self.updateIntervalValue) sec"
        ))
        
        self.addSubview(SelectTitleRow(
            frame: NSRect(x: Constants.Settings.margin, y: Constants.Settings.margin, width: self.frame.width - (Constants.Settings.margin*2), height: rowHeight),
            title: LocalizedString("Number of top processes"),
            action: #selector(changeNumberOfProcesses),
            items: NumbersOfProcesses.map{ "\($0)" },
            selected: "\(self.numberOfProcesses)"
        ))
        
        self.setFrameSize(NSSize(width: self.frame.width, height: (rowHeight*(num+1)) + (Constants.Settings.margin*(2+num))))
    }
    
    @objc private func changeUpdateInterval(_ sender: NSMenuItem) {
        if let value = Int(sender.title.replacingOccurrences(of: " sec", with: "")) {
            self.updateIntervalValue = value
            Store.shared.set(key: "\(self.title)_updateInterval", value: value)
            self.setInterval(value)
        }
    }
    
    @objc private func changeNumberOfProcesses(_ sender: NSMenuItem) {
        if let value = Int(sender.title) {
            self.numberOfProcesses = value
            Store.shared.set(key: "\(self.title)_processes", value: value)
            self.callbackWhenUpdateNumberOfProcesses()
        }
    }
}