//
//  EQNBaseContainerTableViewCell.swift
//  Earthquake Network
//
//  Created by Andrea Busi on 14/06/24.
//  Copyright © 2024 Earthquake Network. All rights reserved.
//

import UIKit


class EQNBaseContainerTableViewCell: UITableViewCell {
    
    static let DefaultVerticalSpacing: CGFloat = 10.0
    static let DefaultPadding: CGFloat = 8.0
    
    lazy var containerView: UIView = {
        let view = UIView(frame: .zero)
        view.translatesAutoresizingMaskIntoConstraints = false
        view.backgroundColor = .white
        view.layer.cornerRadius = AppTheme.shared.cardCornerRadius
        view.layer.masksToBounds = false
        
        // add shadow
        view.layer.shadowColor = UIColor.black.cgColor
        view.layer.shadowOpacity = 0.5
        view.layer.shadowOffset = CGSize(width: 0, height: 2)
        view.layer.shadowRadius = 2
        return view
    }()
    
    private lazy var headerLabel: UILabel = {
        let label = EQNEdgeInsetLabel()
        label.translatesAutoresizingMaskIntoConstraints = false
        label.backgroundColor = AppTheme.Colors.lightBlue
        label.font = .systemFont(ofSize: 17.0, weight: .medium)
        label.textColor = .white
        return label
    }()
    
    private lazy var emptyTopView: UIView = {
        let view = UIView(frame: .zero)
        view.backgroundColor = .clear
        return view
    }()

    var topView: UIView {
        isHeaderVisible ? headerLabel : emptyTopView
    }
    
    var isHeaderVisible: Bool { true }
    var headerText: String { "" }
    
    // MARK: - Init
    
    override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
        setupUI()
        updateUI()
    }
    
    required init?(coder: NSCoder) {
        super.init(coder: coder)
        setupUI()
        updateUI()
    }

    // MARK: - Internal
    
    func setupUI() {
        selectionStyle = .default
        backgroundColor = .clear
        
        contentView.addSubview(containerView)
        
        containerView.topAnchor.constraint(equalTo: contentView.topAnchor, constant: 4.0).isActive = true
        containerView.trailingAnchor.constraint(equalTo: contentView.trailingAnchor, constant: -8.0).isActive = true
        containerView.leadingAnchor.constraint(equalTo: contentView.leadingAnchor, constant: 8.0).isActive = true
        containerView.bottomAnchor.constraint(equalTo: contentView.bottomAnchor, constant: -4.0).isActive = true
        
        if isHeaderVisible {
            containerView.addSubview(headerLabel)
            headerLabel.topAnchor.constraint(equalTo: containerView.topAnchor).isActive = true
            headerLabel.leadingAnchor.constraint(equalTo: containerView.leadingAnchor).isActive = true
            headerLabel.heightAnchor.constraint(equalToConstant: 26.0).isActive = true
        } else {
            containerView.addSubview(emptyTopView)
            emptyTopView.topAnchor.constraint(equalTo: containerView.topAnchor).isActive = true
            emptyTopView.leadingAnchor.constraint(equalTo: containerView.leadingAnchor).isActive = true
            emptyTopView.trailingAnchor.constraint(equalTo: containerView.trailingAnchor).isActive = true
            emptyTopView.heightAnchor.constraint(equalToConstant: 0.0).isActive = true
        }
    }
    
    func updateUI() {
        // setup titles, colors and UI stuff here
        headerLabel.text = headerText
    }
}