import Foundation
import UIKit
import Display
import Postbox
import TelegramCore
import TelegramPresentationData
import TelegramUIPreferences
import AccountContext
import AnimatedStickerNode
import AppBundle

public final class VoiceChatAccountHeaderActionSheetItem: ActionSheetItem {
    let title: String
    let text: String
    
    public init(title: String, text: String) {
        self.title = title
        self.text = text
    }
    
    public func node(theme: ActionSheetControllerTheme) -> ActionSheetItemNode {
        return VoiceChatAccountHeaderActionSheetItemNode(theme: theme, title: self.title, text: self.text)
    }
    
    public func updateNode(_ node: ActionSheetItemNode) {
    }
}

private final class VoiceChatAccountHeaderActionSheetItemNode: ActionSheetItemNode {
    private let theme: ActionSheetControllerTheme
    
    private let iconBackgroundNode: ASImageNode
    private let iconNode: ASImageNode
    private let titleNode: ImmediateTextNode
    private let textNode: ImmediateTextNode
    
    private let accessibilityArea: AccessibilityAreaNode
    
    init(theme: ActionSheetControllerTheme, title: String, text: String) {
        self.theme = theme
        
        let titleFont = Font.bold(floor(theme.baseFontSize))
        let textFont = Font.regular(floor(theme.baseFontSize * 13.0 / 17.0))
        
        self.iconBackgroundNode = ASImageNode()
        self.iconBackgroundNode.displaysAsynchronously = false
        self.iconBackgroundNode.displayWithoutProcessing = true
        self.iconBackgroundNode.image = generateImage(CGSize(width: 72.0, height: 72.0), contextGenerator: { size, context in
            let bounds = CGRect(origin: CGPoint(), size: size)
            context.clear(bounds)
            context.addPath(UIBezierPath(ovalIn: bounds).cgPath)
            context.clip()
            
            var locations: [CGFloat] = [0.0, 1.0]
            let colorsArray: NSArray = [UIColor(rgb: 0x2a9ef1).cgColor, UIColor(rgb: 0x72d5fd).cgColor]
            let colorSpace = CGColorSpaceCreateDeviceRGB()
            let gradient = CGGradient(colorsSpace: colorSpace, colors: colorsArray, locations: &locations)!
            
            context.drawLinearGradient(gradient, start: CGPoint(), end: CGPoint(x: 0.0, y: size.height), options: CGGradientDrawingOptions())
        })
        
        self.iconNode = ASImageNode()
        self.iconNode.displaysAsynchronously = false
        self.iconNode.displayWithoutProcessing = true
        self.iconNode.image = generateTintedImage(image: UIImage(bundleImageName: "Call/Accounts"), color: UIColor.white)
        
        self.titleNode = ImmediateTextNode()
        self.titleNode.displaysAsynchronously = false
        self.titleNode.maximumNumberOfLines = 0
        self.titleNode.textAlignment = .center
        self.titleNode.isAccessibilityElement = false
        
        self.textNode = ImmediateTextNode()
        self.textNode.displaysAsynchronously = false
        self.textNode.maximumNumberOfLines = 0
        self.textNode.textAlignment = .center
        self.textNode.isAccessibilityElement = false
        
        self.accessibilityArea = AccessibilityAreaNode()
        
        super.init(theme: theme)
                
        self.addSubnode(self.iconBackgroundNode)
        self.addSubnode(self.iconNode)
        self.addSubnode(self.titleNode)
        self.addSubnode(self.textNode)
        self.addSubnode(self.accessibilityArea)
       
        self.titleNode.attributedText = NSAttributedString(string: title, font: titleFont, textColor: theme.primaryTextColor)
        self.textNode.attributedText = NSAttributedString(string: text, font: textFont, textColor: theme.secondaryTextColor)
            
        self.accessibilityArea.accessibilityLabel = text
        self.accessibilityArea.accessibilityTraits = .staticText
    }
    
    public override func updateLayout(constrainedSize: CGSize, transition: ContainedViewLayoutTransition) -> CGSize {
        let titleSize = self.titleNode.updateLayout(CGSize(width: constrainedSize.width - 80.0, height: .greatestFiniteMagnitude))
        let textSize = self.textNode.updateLayout(CGSize(width: constrainedSize.width - 80.0, height: .greatestFiniteMagnitude))
        
        let topInset: CGFloat = 20.0
        let titleSpacing: CGFloat = 10.0
        let textSpacing: CGFloat = 6.0
        let bottomInset: CGFloat = 14.0
        
        let iconSize = CGSize(width: 72.0, height: 72.0)
        let iconFrame = CGRect(origin: CGPoint(x: floor((constrainedSize.width - iconSize.width) / 2.0), y: topInset), size: iconSize)
        self.iconBackgroundNode.frame = iconFrame
        if let image = self.iconNode.image {
            self.iconNode.frame = CGRect(origin: CGPoint(x: iconFrame.minX + floorToScreenPixels((iconSize.width - image.size.width) / 2.0), y: iconFrame.minY + floorToScreenPixels((iconSize.height - image.size.height) / 2.0)), size: image.size)
        }
        
        self.titleNode.frame = CGRect(origin: CGPoint(x: floor((constrainedSize.width - titleSize.width) / 2.0), y: topInset + iconSize.height + titleSpacing), size: titleSize)
        
        self.textNode.frame = CGRect(origin: CGPoint(x: floor((constrainedSize.width - textSize.width) / 2.0), y: topInset + iconSize.height + titleSpacing + titleSize.height + textSpacing), size: textSize)
        
        let size = CGSize(width: constrainedSize.width, height: topInset + iconSize.height + titleSpacing + titleSize.height + textSpacing + textSize.height + bottomInset)
        self.accessibilityArea.frame = CGRect(origin: CGPoint(), size: size)
               
        self.updateInternalLayout(size, constrainedSize: constrainedSize)
        return size
    }
}