//
//  CommonPopup.swift
//  Wallet
//
//  Created by Igor on 23.03.2021.
//  Copyright © 2021 AM. All rights reserved.
//

import UIKit

enum Popup {

    private enum Constants {
        enum PopupWithLoader {
            static let titleSize: CGFloat = 16
            static let loaderSize: CGFloat = 65
            static let stackSpacing: CGFloat = 55
            static let stackHorizontal: CGFloat = 24
            static let stackVertical: CGFloat = 80
        }
    }
    
    @discardableResult static func show(
        title: String? = nil,
        text: String? = nil,
        image: UIImage? = nil,
        description: String? = nil,
        views: [UIView] = [],
        buttons: [CommonButtonAction] = [],
        buttonsActions: [((UIViewController) -> Void)?] = [],
        spacing: CGFloat = 12,
        in parent: UIViewController = .topController(),
        animated: Bool = true,
        _ completion: (() -> Void)? = nil
    ) -> UIViewController {
        var subviews = [UIView]()
        if let image = image {
            let imgView = UIImageView(image: image)
            imgView.contentMode = .center
            subviews.append(imgView)
        }
        if let description = description {
            subviews.append(.label(text: description, style: .regular, size: 14, color: Asset.textGranite.color, numberOfLines: 0))
        }

        for (index, view) in views.enumerated() {
            if index != 0 {
                subviews.append(.view(height: spacing))
            }
            subviews.append(view)
        }

        var ctrl: UIViewController!

        if buttons.count > 0 {
            subviews.append(.view(height: 24))
            for (index, button) in buttons.enumerated() {
                if index != 0 {
                    subviews.append(.view(height: 16))
                }
                if index < buttonsActions.count, let action = buttonsActions[index] {
                    button.action = .action() { [weak button] _ in
                        button?.isUserInteractionEnabled = false
                        action(ctrl)
                        button?.isUserInteractionEnabled = true
                    }
                } else {
                    button.action = .action() { _ in Popup.hide(in: parent) }
                }
                subviews.append(button)
            }
        }

        subviews.append(.view(height: 12))
        ctrl = CommonControllerPopup(title: title, text: text, views: subviews, spacing: 0, completion: completion)
        parent.present(ctrl, animated: true)
        return ctrl
    }

    @discardableResult
    static func show(
        title: String? = nil,
        text: String? = nil,
        image: UIImage? = nil,
        description: String? = nil,
        views: [UIView] = [],
        submit: String? = nil,
        submitStyle: UIButton.Style = .primary,
        cancel: String? = nil,
        cancelStyle: UIButton.Style = .primary,
        cancelSize: UIButton.Size = .large,
        submitEnabled: Bool = true,
        spacing: CGFloat = 12,
        in parent: UIViewController = .topController(),
        animated: Bool = true,
        _ submitCompletion: ((UIViewController) -> Void)? = nil,
        _ completion: (() -> Void)? = nil
    ) -> UIViewController {

        var buttons: [CommonButtonAction] = []
        var buttonsActions: [((UIViewController) -> Void)?] = []

        if let submit = submit {
            buttons.append(.button(style: submitStyle, title: submit, isEnabled: submitEnabled, action: {}))
            buttonsActions.append(submitCompletion)
        }

        if let cancel = cancel {
            buttons.append(.button(style: cancelStyle, title: cancel, image: nil, size: cancelSize, action: {}))
            buttonsActions.append(nil)
        }

        return show(title: title, text: text, image: image, description: description, views: views,
             buttons: buttons, buttonsActions: buttonsActions,
             spacing: spacing, in: parent, animated: animated, completion)
    }
    
    static func showWithLoader(in controller: UIViewController, 
                               with title: String) {
        let label = UILabel()
        label.numberOfLines = 0
        label.attributedText = title.attributed(style: .regular, size: Constants.PopupWithLoader.titleSize, alignment: .center)
        let loader = CommonViewLoading(showImmediatelyWithSize: Constants.PopupWithLoader.loaderSize)
        let views: [UIView] = [loader, label]
        let popup = CommonControllerPopup(views: views, 
                                          spacing: Constants.PopupWithLoader.stackSpacing, 
                                          leftSpace: Constants.PopupWithLoader.stackHorizontal, 
                                          rightSpace: Constants.PopupWithLoader.stackHorizontal, 
                                          topSpace: Constants.PopupWithLoader.stackVertical, 
                                          bottomSpace: Constants.PopupWithLoader.stackVertical)
        
        controller.present(popup, animated: true)
    }

    static func show(
        content: UIViewController,
        in parent: UIViewController = .topController(),
        contentScrollIsEnabled: Bool = true,
        animated: Bool = true,
        _ completion: (() -> Void)? = nil
    ) { 
        let popupController = CommonControllerPopup(contentViewController: content, 
                                                  contentScrollIsEnabled: contentScrollIsEnabled, 
                                                  completion: completion)
        parent.present(popupController, animated: animated)
    }
    
    static func hide(in parent: UIViewController = .topController(), completion: (() -> Void)? = nil) { 
        parent.dismiss(animated: true) { completion?() }
    }
}