import Foundation
import UIKit
import TelegramCore
import AsyncDisplayKit
import TelegramPresentationData
import TelegramUIPreferences
import AccountContext
import ContextUI

enum InstantPageShape {
    case rect
    case ellipse
    case roundLine
}

public final class InstantPageShapeItem: InstantPageItem {
    public var frame: CGRect
    let shapeFrame: CGRect
    let shape: InstantPageShape
    let color: UIColor
    
    public let medias: [InstantPageMedia] = []
    public let wantsNode: Bool = false
    public let separatesTiles: Bool = false
    
    init(frame: CGRect, shapeFrame: CGRect, shape: InstantPageShape, color: UIColor) {
        self.frame = frame
        self.shapeFrame = shapeFrame
        self.shape = shape
        self.color = color
    }
    
    public func drawInTile(context: CGContext) {
        context.setFillColor(self.color.cgColor)
        
        switch self.shape {
            case .rect:
                context.fill(self.shapeFrame.offsetBy(dx: self.frame.minX, dy: self.frame.minY))
            case .ellipse:
                context.fillEllipse(in: self.shapeFrame.offsetBy(dx: self.frame.minX, dy: self.frame.minY))
            case .roundLine:
                if self.shapeFrame.size.width < self.shapeFrame.size.height {
                    let radius = self.shapeFrame.size.width / 2.0
                    var shapeFrame = self.shapeFrame.offsetBy(dx: self.frame.minX, dy: self.frame.minY)
                    shapeFrame.origin.y += radius
                    shapeFrame.size.height -= radius + radius
                    context.fill(shapeFrame)
                    context.fillEllipse(in: CGRect(x: shapeFrame.minX, y: shapeFrame.minY - radius, width: radius + radius, height: radius + radius))
                    context.fillEllipse(in: CGRect(x: shapeFrame.minX, y: shapeFrame.maxY - radius, width: radius + radius, height: radius + radius))
                } else {
                    context.fill(self.shapeFrame.offsetBy(dx: self.frame.minX, dy: self.frame.minY))
                }
        }
    }
    
    public func matchesAnchor(_ anchor: String) -> Bool {
        return false
    }
    
    public func matchesNode(_ node: InstantPageNode) -> Bool {
        return false
    }
    
    public func node(context: AccountContext, strings: PresentationStrings, nameDisplayOrder: PresentationPersonNameOrder, theme: InstantPageTheme, sourceLocation: InstantPageSourceLocation, openMedia: @escaping (InstantPageMedia) -> Void, longPressMedia: @escaping (InstantPageMedia) -> Void, activatePinchPreview: ((PinchSourceContainerNode) -> Void)?, pinchPreviewFinished: ((InstantPageNode) -> Void)?, openPeer: @escaping (EnginePeer) -> Void, openUrl: @escaping (InstantPageUrlItem) -> Void, updateWebEmbedHeight: @escaping (CGFloat) -> Void, updateDetailsExpanded: @escaping (Bool) -> Void, currentExpandedDetails: [Int : Bool]?, getPreloadedResource: @escaping (String) -> Data?) -> InstantPageNode? {
        return nil
    }
    
    public func linkSelectionRects(at point: CGPoint) -> [CGRect] {
        return []
    }
    
    public func distanceThresholdGroup() -> Int? {
        return nil
    }
    
    public func distanceThresholdWithGroupCount(_ count: Int) -> CGFloat {
        return 0.0
    }
}