ElongationConfig.swift

//
//  ElongationConfig.swift
//  ElongationPreview
//
//  Created by Abdurahim Jauzee on 09/02/2017.
//  Copyright © 2017 Ramotion. All rights reserved.
//

import UIKit

/// Whole module views configuration
public struct ElongationConfig {

    /// Empty public initializer.
    public init() {}

    /// Shared instance. Override this property to apply changes.
    public static var shared = ElongationConfig()

    // MARK: Behaviour 🔧

    /// :nodoc:
    public enum CellTouchAction {
        case collapseOnTopExpandOnBottom, collapseOnBottomExpandOnTop, collapseOnBoth, expandOnBoth, expandOnTop, expandOnBottom
    }

    /// What `elongationCell` should do on touch
    public var cellTouchAction = CellTouchAction.collapseOnTopExpandOnBottom

    /// :nodoc:
    public enum HeaderTouchAction {
        case collpaseOnBoth, collapseOnTop, collapseOnBottom, noAction
    }

    /// What `elongationHeader` should do on touch
    public var headerTouchAction = HeaderTouchAction.collapseOnTop

    /// Enable gestures on `ElongationCell` & `ElongationHeader`.
    /// These gestures will give ability to expand/dismiss the cell and detail view controller.
    /// Default value: `true`
    public var isSwipeGesturesEnabled = true

    /// Enable `UIPreviewIntearction` on `ElongationCell`.
    /// Default value: `true`
    public var forceTouchPreviewInteractionEnabled = true

    /// Enable `UILongPressGesture` on `ElongationCell`.
    /// This gesture will allow to `expand` `ElongationCell` on long tap. By default, this option will be used on devices without 3D Touch technology.
    /// Default value: `true`
    public var longPressGestureEnabled = true

    // MARK: Appearance 🎨

    /// Actual height of `topView`.
    /// Default value: `200`
    public var topViewHeight: CGFloat = 200

    /// `topView` scale value which will be used for making CGAffineTransform
    /// to `expanded` state
    /// Default value: `0.9`
    public var scaleViewScaleFactor: CGFloat = 0.9

    /// Parallax effect factor.
    /// Default value: `nil`
    public var parallaxFactor: CGFloat?

    /// Should we enable parallax effect on ElongationCell (read-only).
    /// Will be `true` if `separator` not `nil` && greater than zero
    public var isParallaxEnabled: Bool {
        switch parallaxFactor {
        case .none: return false
        case let .some(value): return value > 0
        }
    }

    /// Offset of `bottomView` against `topView`
    /// Default value: `20`
    public var bottomViewOffset: CGFloat = 20

    /// `bottomView` height value
    /// Default value: `180`
    public var bottomViewHeight: CGFloat = 180

    /// Height of custom separator line between cells in tableView
    /// Default value: `nil`
    public var separatorHeight: CGFloat?

    /// Color of custom separator
    /// Default value: `.white`
    public var separatorColor: UIColor = .white

    /// Should we create custom separator view (read-only).
    /// Will be `true` if `separator` not `nil` && greater than zero.
    public var customSeparatorEnabled: Bool {
        switch separatorHeight {
        case .none: return false
        case let .some(value): return value > 0
        }
    }

    /// Duration of `detail` view controller presentation animation
    /// Default value: `0.3`
    public var detailPresentingDuration: TimeInterval = 0.3

    /// Duration of `detail` view controller dismissing animation
    /// Default value: `0.4`
    public var detailDismissingDuration: TimeInterval = 0.4
}