//
//  CombinedView.swift
//  Stats
//
//  Created by Serhiy Mytrovtsiy on 09/01/2023
//  Using Swift 5.0
//  Running on macOS 13.1
//
//  Copyright © 2023 Serhiy Mytrovtsiy. All rights reserved.
//

import Cocoa
import Kit

class CombinedView {
    private var menuBarItem: NSStatusItem? = nil
    private var view: NSView = NSView(frame: NSRect(x: 0, y: 0, width: 100, height: Constants.Widget.height))
    
    private var status: Bool {
        Store.shared.bool(key: "CombinedModules", defaultValue: false)
    }
    private var spacing: CGFloat {
        CGFloat(Int(Store.shared.string(key: "CombinedModules_spacing", defaultValue: "")) ?? 0)
    }
    
    init() {
        modules.forEach { (m: Module) in
            m.menuBar.callback = { [weak self] in
                if let s = self?.status, s {
                    DispatchQueue.main.async(execute: {
                        self?.recalculate()
                    })
                }
            }
        }
        
        if self.status {
            self.enable()
        }
        
        NotificationCenter.default.addObserver(self, selector: #selector(listenForOneView), name: .toggleOneView, object: nil)
        NotificationCenter.default.addObserver(self, selector: #selector(listenForModuleRearrrange), name: .moduleRearrange, object: nil)
    }
    
    deinit {
        NotificationCenter.default.removeObserver(self, name: .toggleOneView, object: nil)
    }
    
    public func enable() {
        self.menuBarItem = NSStatusBar.system.statusItem(withLength: 0)
        self.menuBarItem?.autosaveName = "CombinedModules"
        self.menuBarItem?.button?.addSubview(self.view)
        
        self.menuBarItem?.button?.target = self
        self.menuBarItem?.button?.action = #selector(self.openSettings)
        self.menuBarItem?.button?.sendAction(on: [.leftMouseDown, .rightMouseDown])
        
        DispatchQueue.main.async(execute: {
            self.recalculate()
        })
    }
    
    public func disable() {
        if let item = self.menuBarItem {
            NSStatusBar.system.removeStatusItem(item)
        }
        self.menuBarItem = nil
    }
    
    private func recalculate() {
        self.view.subviews.forEach({ $0.removeFromSuperview() })
        
        var w: CGFloat = 0
        var i: Int = 0
        modules.filter({ $0.enabled }).sorted(by: { $0.combinedPosition < $1.combinedPosition }).forEach { (m: Module) in
            self.view.addSubview(m.menuBar.view)
            self.view.subviews[i].setFrameOrigin(NSPoint(x: w, y: 0))
            w += m.menuBar.view.frame.width + self.spacing
            i += 1
        }
        self.view.setFrameSize(NSSize(width: w, height: self.view.frame.height))
        self.menuBarItem?.length = w
    }
    
    @objc private func openSettings() {
        NotificationCenter.default.post(name: .toggleSettings, object: nil, userInfo: ["module": "Dashboard"])
    }
    
    @objc private func listenForOneView(_ notification: Notification) {
        guard notification.userInfo?["module"] == nil else { return }
        
        if self.status {
            self.enable()
        } else {
            self.disable()
        }
    }
    
    @objc private func listenForModuleRearrrange() {
        self.recalculate()
    }
}