//
//  MoleculeStackView.swift
//  MVMCoreUI
//
//  Created by Scott Pfeil on 2/11/19.
//  Copyright © 2019 Verizon Wireless. All rights reserved.
//

import UIKit

public class MoleculeStackView: MFView {
    var spacingBlock: ((Any) -> UIEdgeInsets)?
    var moleculesArray: [UIView]?
    var useMargins: Bool = false

    public override init(frame: CGRect) {
        super.init(frame: frame)
    }
    
    public init(withJSON json: [AnyHashable: Any]?, delegateObject: DelegateObject?, additionalData: [AnyHashable : Any]?) {
        super.init(frame: CGRect.zero)
        setWithJSON(json, delegateObject: delegateObject, additionalData: additionalData)
    }
    
    public convenience init(withJSON json: [AnyHashable: Any]?, delegateObject: DelegateObject?, spacingBlock: ((Any) -> UIEdgeInsets)?) {
        self.init(withJSON: json, delegateObject: delegateObject, additionalData: nil)
        self.spacingBlock = spacingBlock
    }
    
    public required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    public override func setupView() {
        super.setupView()
        translatesAutoresizingMaskIntoConstraints = false
        backgroundColor = .clear
        self.setContentHuggingPriority(UILayoutPriority.required, for: NSLayoutConstraint.Axis.vertical)
        self.setContentCompressionResistancePriority(UILayoutPriority.required, for: NSLayoutConstraint.Axis.vertical)
    }
    
    public override func updateView(_ size: CGFloat) {
        super.updateView(size)
        for view in subviews {
            if let mvmView = view as? MVMCoreViewProtocol {
                mvmView.updateView(size)
            }
        }
    }
    
    open override func setWithJSON(_ json: [AnyHashable: Any]?, delegateObject: DelegateObject?, additionalData: [AnyHashable: Any]?) {
        super.setWithJSON(json, delegateObject: delegateObject, additionalData: additionalData)
        guard let molecules = json?.arrayForKey("molecules") as? [[String: Any]] else {
            return
        }
        
        // Create the molecules and set the json.
        var moleculesArray = [] as [UIView]
        for moleculeJSON in molecules {
            if let name = moleculeJSON.optionalStringForKey("moleculeName"), let molecule = MVMCoreUIMoleculeMappingObject.shared()?.getMoleculeForName(name) {
                molecule.setWithJSON(moleculeJSON, delegateObject: delegateObject, additionalData: additionalData)
                moleculesArray.append(molecule)
            }
        }
        
        guard moleculesArray.count > 0 else {
            return
        }
        
        if let spacingBlock = spacingBlock {
            MVMCoreUIStackableViewController.populateView(self, withUIArray: moleculesArray, useMargins: useMargins, withSpacingBlock: spacingBlock)
        } else {
            MVMCoreUIStackableViewController.populateView(self, withUIArray: moleculesArray, useMargins: useMargins) { (object) -> UIEdgeInsets in
                if object as AnyObject? === moleculesArray.first {
                    return UIEdgeInsets.zero
                } else {
                    return UIEdgeInsets.init(top: PaddingTwo, left: 0, bottom: 0, right: 0)
                }
            }
        }
    }
}