//
//  GroupQRView.swift
//  Paiai_iOS
//
//  Created by FFIB on 2019/2/18.
//  Copyright © 2019 FFIB. All rights reserved.
//

import UIKit
import PaiaiUIKit

class GroupQRView: NiblessView {

    private var group_name: String
    private var group_avatar: String
    private var groupQR: String

    lazy var groupAvatarImageView: UIImageView = {
        let imageView = UIImageView()

        imageView.image = UIImage(named: group_avatar)

        return imageView
    }()

    lazy var groupNameLabel: UILabel = {
        let label = UILabel()

        label.text = group_name
        label.font = UIFont.systemFont(ofSize: 17)

        return label
    }()

    lazy var qrImageView: UIImageView = {
        let imageView = UIImageView()

        imageView.image = UIImage(qr: groupQR)

        return imageView
    }()

    lazy var qrLabel: UILabel = {
        let label = UILabel()

        label.text = "扫描二维码加入群"
        label.textColor = UIColor(gray: 153)
        label.font = UIFont.systemFont(ofSize: 14)

        return label
    }()

    init(group_name: String, group_avatar: String, groupQR: String) {
        self.group_name = group_name
        self.group_avatar = group_avatar
        self.groupQR = groupQR

        super.init(frame: CGRect.zero)
    }

    override func didMoveToWindow() {
        super.didMoveToWindow()
        constructViewHierarchy()
        activateConstraints()
        backgroundColor = UIColor.white
    }

    private func constructViewHierarchy() {
        addSubview(groupAvatarImageView)
        addSubview(groupNameLabel)
        addSubview(qrImageView)
        addSubview(qrLabel)
    }
}

fileprivate extension GroupQRView {
    func activateConstraints() {
        activateConstraintsContent()
        activateConstraintsQRImageView()
        activateConstraintsQRLabel()
        activateConstraintsGroupAvatarImageView()
        activateConstraintsGroupNameLabel()
    }

    func activateConstraintsContent() {
        guard let superView = superview else { return }

        translatesAutoresizingMaskIntoConstraints = false

        NSLayoutConstraint.activate([
            widthAnchor.constraint(equalToConstant: 300),
            centerXAnchor.constraint(equalTo: superView.centerXAnchor),
            centerYAnchor.constraint(equalTo: superView.centerYAnchor)
        ])
    }

    func activateConstraintsGroupAvatarImageView() {
        groupAvatarImageView.translatesAutoresizingMaskIntoConstraints = false

        NSLayoutConstraint.activate([
            groupAvatarImageView.widthAnchor.constraint(equalToConstant: 50),
            groupAvatarImageView.heightAnchor.constraint(equalToConstant: 50),
            groupAvatarImageView.centerXAnchor.constraint(equalTo: centerXAnchor),
            groupAvatarImageView.topAnchor.constraint(equalTo: topAnchor, constant: 12)
        ])
    }

    func activateConstraintsGroupNameLabel() {
        groupNameLabel.translatesAutoresizingMaskIntoConstraints = false

        NSLayoutConstraint.activate([
            groupNameLabel.centerXAnchor.constraint(equalTo: centerXAnchor),
            groupNameLabel.topAnchor.constraint(equalTo: groupAvatarImageView.bottomAnchor, constant: 6)
        ])

    }

    func activateConstraintsQRImageView() {
        qrImageView.translatesAutoresizingMaskIntoConstraints = false

        NSLayoutConstraint.activate([
            qrImageView.widthAnchor.constraint(equalToConstant: 250),
            qrImageView.centerXAnchor.constraint(equalTo: centerXAnchor),
            qrImageView.widthAnchor.constraint(equalTo: qrImageView.heightAnchor),
            qrImageView.topAnchor.constraint(equalTo: groupNameLabel.bottomAnchor, constant: 12)
        ])
    }

    func activateConstraintsQRLabel() {
        qrLabel.translatesAutoresizingMaskIntoConstraints = false

        NSLayoutConstraint.activate([
            qrLabel.centerXAnchor.constraint(equalTo: centerXAnchor),
            qrLabel.bottomAnchor.constraint(equalTo: bottomAnchor, constant: -12),
            qrLabel.topAnchor.constraint(equalTo: qrImageView.bottomAnchor, constant: 6)
        ])
    }
}