//
//  ToastView.swift
//  PaiAi
//
//  Created by mac on 16/7/21.
//  Copyright © 2016年 FFIB. All rights reserved.
//

import UIKit

class ToastView: UIView {
    
    fileprivate(set) var option: ToastOption
    fileprivate(set) var toastType: Toast.ToastType = .text("")
    fileprivate(set) var contentView: UIView = UIView()
    
    fileprivate var _constraints: [NSLayoutConstraint] = []
    
    override init(frame: CGRect) {
        option = .default
        super.init(frame: CGRect.zero)
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    convenience init(option: ToastOption, type: Toast.ToastType) {
        self.init(frame: CGRect.zero)
        self.option = option
        
        switch type {
        case let .text(text):
            contentView = ToastTextView(text: text, option: option)
        default:
            break
        }
        
        initProperty()
    }
    
    private func initProperty() {
        alpha = 0
        layer.cornerRadius = 5
        backgroundColor = option.backgroundColor
    }
    
    override func didMoveToWindow() {
        switch toastType {
        case .text:
            constructViewHierarchyText()
            activateConstraintsText()
        default:
            break
        }
    }
}

/// text
fileprivate extension ToastView {
    func constructViewHierarchyText() {
        addSubview(contentView)
    }
    
    func activateConstraintsText() {
        activateContraintsToastView()
        activateContraintsToastTextView()
    }
    
    func activateContraintsToastView() {
        guard let v = superview else { return }
        translatesAutoresizingMaskIntoConstraints = false
        
        NSLayoutConstraint.activate([
            contentView.centerXAnchor.constraint(equalTo: v.centerXAnchor),
            contentView.centerYAnchor.constraint(equalTo: v.centerYAnchor)
        ])
    }
    
    func activateContraintsToastTextView() {
        let windowSize = UIScreen.main.bounds.size
        contentView.translatesAutoresizingMaskIntoConstraints = false
        
        let textConstraints = [
            contentView.topAnchor.constraint(equalTo: topAnchor, constant: 6),
            contentView.bottomAnchor.constraint(equalTo: bottomAnchor, constant: -6),
            contentView.leadingAnchor.constraint(equalTo: leadingAnchor, constant: 6),
            contentView.trailingAnchor.constraint(equalTo: trailingAnchor, constant: -6),
            contentView.widthAnchor.constraint(lessThanOrEqualToConstant: windowSize.width - 40)
        ]
        
        NSLayoutConstraint.activate(textConstraints)
        
        _constraints += textConstraints
    }
}