//
//  MaterialShowcaseInstructionView.swift
//  MaterialShowcase
//
//  Created by Andrei Tulai on 2017-11-16.
//  Copyright © 2017 Aromajoin. All rights reserved.
//

import Foundation
import UIKit

public class MaterialShowcaseInstructionView: UIView {
    
    internal static let PRIMARY_TEXT_SIZE: CGFloat = 20
    internal static let SECONDARY_TEXT_SIZE: CGFloat = 15
    internal static let BUTTON_TEXT_SIZE: CGFloat = 0.8*SECONDARY_TEXT_SIZE
    internal static let PRIMARY_TEXT_COLOR = UIColor.white
    internal static let SECONDARY_TEXT_COLOR = UIColor.white.withAlphaComponent(0.87)
    internal static let PRIMARY_DEFAULT_TEXT = "Awesome action"
    internal static let SECONDARY_DEFAULT_TEXT = "Tap here to do some awesome thing"
    internal static let BUTTON_DEFAULT_TEXT = "OK"
    internal static let BUTTON_DEFAULT_TEXT_COLOR = UIColor.white
    internal static let BUTTON_DEFAULT_BG_COLOR = UIColor.red
    internal static let BUTTON_DEFAULT_VISABLE = true
    internal static let BUTTON_DEFAULT_RADIUS: CGFloat = 16
    
    public var primaryLabel: UILabel!
    public var secondaryLabel: UILabel!
    public var buttonLabel: UIButton!
    
    // Text
    public var primaryText: String!
    public var secondaryText: String!
    public var primaryTextColor: UIColor!
    public var secondaryTextColor: UIColor!
    public var primaryTextSize: CGFloat!
    public var secondaryTextSize: CGFloat!
    public var buttonTextSize: CGFloat!
    public var primaryTextFont: UIFont?
    public var secondaryTextFont: UIFont?
    public var primaryTextAlignment: NSTextAlignment!
    public var secondaryTextAlignment: NSTextAlignment!
    
    // Button
    public var buttonVisable: Bool!
    public var buttonText: String!
    public var buttonTextColor: UIColor!
    public var buttonBGColor: UIColor!
    public var buttomRadius: CGFloat!
    
    // Other props
    var controller: MaterialShowcaseController!
    
    public init() {
        // Create frame
        let frame = CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: 0)
        super.init(frame: frame)
        
        configure()
    }
    
    public required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    /// Initializes default view properties
    fileprivate func configure() {
        setDefaultProperties()
    }
    
    fileprivate func setDefaultProperties() {
        // Text
        primaryText = MaterialShowcaseInstructionView.PRIMARY_DEFAULT_TEXT
        secondaryText = MaterialShowcaseInstructionView.SECONDARY_DEFAULT_TEXT
        buttonText = MaterialShowcaseInstructionView.BUTTON_DEFAULT_TEXT
        primaryTextColor = MaterialShowcaseInstructionView.PRIMARY_TEXT_COLOR
        secondaryTextColor = MaterialShowcaseInstructionView.SECONDARY_TEXT_COLOR
        primaryTextSize = MaterialShowcaseInstructionView.PRIMARY_TEXT_SIZE
        secondaryTextSize = MaterialShowcaseInstructionView.SECONDARY_TEXT_SIZE
        buttonTextSize = MaterialShowcaseInstructionView.BUTTON_TEXT_SIZE
        
        // Button
        buttonVisable = MaterialShowcaseInstructionView.BUTTON_DEFAULT_VISABLE
        buttonText = MaterialShowcaseInstructionView.BUTTON_DEFAULT_TEXT
        buttonTextColor = MaterialShowcaseInstructionView.BUTTON_DEFAULT_TEXT_COLOR
        buttonBGColor = MaterialShowcaseInstructionView.BUTTON_DEFAULT_BG_COLOR
        buttomRadius = MaterialShowcaseInstructionView.BUTTON_DEFAULT_RADIUS
    }
    
    /// Configures and adds primary label view
    private func addPrimaryLabel() {
        primaryLabel = UILabel()
        
        if let font = primaryTextFont {
            primaryLabel.font = font
        } else {
            primaryLabel.font = UIFont.boldSystemFont(ofSize: primaryTextSize)
        }
        primaryLabel.textColor = primaryTextColor
        primaryLabel.textAlignment = self.primaryTextAlignment ?? .left
        primaryLabel.numberOfLines = 0
        primaryLabel.lineBreakMode = NSLineBreakMode.byWordWrapping
        primaryLabel.text = primaryText
        primaryLabel.font = UIFont(name: "SukhumvitSet-Bold", size: primaryTextSize)
        
        //    // Calculate x position
        //    let xPosition = backgroundView.frame.minX > 0 ?
        //      backgroundView.frame.minX + LABEL_MARGIN : LABEL_MARGIN
        //
        //    // Calculate y position
        //    var yPosition: CGFloat!
        //
        //    if getTargetPosition(target: targetView, container: containerView) == .above {
        //      yPosition = center.y + TEXT_CENTER_OFFSET
        //    } else {
        //      yPosition = center.y - TEXT_CENTER_OFFSET - LABEL_DEFAULT_HEIGHT * 2
        //    }
        
        primaryLabel.frame = CGRect(x: 0,
                                    y: 0,
                                    width: getWidth(),
                                    height: 0)
        primaryLabel.sizeToFitHeight()
        addSubview(primaryLabel)
    }
    
    /// Configures and adds secondary label view
    private func addSecondaryLabel() {
        secondaryLabel = UILabel()
        if let font = secondaryTextFont {
            secondaryLabel.font = font
        } else {
            secondaryLabel.font = UIFont.systemFont(ofSize: secondaryTextSize)
        }
        secondaryLabel.textColor = secondaryTextColor
        secondaryLabel.textAlignment = self.secondaryTextAlignment ?? .left
        secondaryLabel.lineBreakMode = NSLineBreakMode.byWordWrapping
        secondaryLabel.text = secondaryText
        secondaryLabel.numberOfLines = 3
        secondaryLabel.font = UIFont(name: "SukhumvitSet-Medium", size: secondaryTextSize)
        secondaryLabel.frame = CGRect(x: 0,
                                      y: primaryLabel.frame.height + 4,
                                      width: getWidth(),
                                      height: 0)
        secondaryLabel.sizeToFitHeight()
        addSubview(secondaryLabel)
        if !buttonVisable {
            frame = CGRect(x: frame.minX, y: frame.minY, width: getWidth(), height: primaryLabel.frame.height + secondaryLabel.frame.height)
        }
    }
    
    private func addButtonLabel() {
        buttonLabel = UIButton()
        buttonLabel.frame = CGRect(x: 0,
                                   y: primaryLabel.frame.height + secondaryLabel.frame.height + 16,
                                   width: getWidth(),
                                   height: 0)
        buttonLabel.setTitle("   " + buttonText + "   ", for: .normal)
        buttonLabel.sizeToFit()
        buttonLabel.isEnabled = true
        buttonLabel.setTitleColor(buttonTextColor, for: .normal)
        buttonLabel.titleLabel?.font = UIFont.boldSystemFont(ofSize: buttonTextSize)
        buttonLabel.titleLabel?.font = UIFont(name: "SukhumvitSet-Bold", size: buttonTextSize)
        buttonLabel.backgroundColor = buttonBGColor
        buttonLabel.titleLabel?.textAlignment = .left
        buttonLabel.layer.cornerRadius = buttomRadius
        addSubview(buttonLabel)
        frame = CGRect(x: frame.minX, y: frame.minY, width: getWidth(), height: primaryLabel.frame.height + secondaryLabel.frame.height + buttonLabel.frame.height + 20)
    }
    
    //Calculate width per device
    private func getWidth() -> CGFloat{
        //superview was left side
        if (self.superview?.frame.origin.x)! < CGFloat(0) {
            return frame.width - (frame.minX/2)
        } else if ((self.superview?.frame.origin.x)! + (self.superview?.frame.size.width)! >
            UIScreen.main.bounds.width) { //superview was right side
            return (frame.width - frame.minX)/2
        }
        return (frame.width - frame.minX)
    }
    
    /// Overrides this to add subviews. They will be drawn when calling show()
    public override func layoutSubviews() {
        super.layoutSubviews()
        addPrimaryLabel()
        addSecondaryLabel()
        if buttonVisable {
            addButtonLabel()
        }
        
        subviews.forEach({$0.isUserInteractionEnabled = true})
    }
}